diff --git a/Makefile.am b/Makefile.am
new file mode 100644
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,66 @@
+ACLOCAL_AMFLAGS = -I m4
+
+AM_CPPFLAGS = -I$(top_srcdir)
+LDADD = $(top_builddir)/lemon/libemon.la
+
+EXTRA_DIST = \
+	m4/lx_check_cplex.m4 \
+	m4/lx_check_glpk.m4 \
+	m4/lx_check_soplex.m4
+
+pkgconfigdir = $(libdir)/pkgconfig
+lemondir = $(pkgincludedir)
+bitsdir = $(lemondir)/bits
+conceptdir = $(lemondir)/concepts
+pkgconfig_DATA =
+lib_LTLIBRARIES =
+lemon_HEADERS =
+bits_HEADERS =
+concept_HEADERS =
+noinst_HEADERS =
+noinst_PROGRAMS =
+bin_PROGRAMS =
+check_PROGRAMS =
+TESTS =
+XFAIL_TESTS =
+
+include lemon/Makefile.am
+include test/Makefile.am
+include doc/Makefile.am
+include demo/Makefile.am
+include benchmark/Makefile.am
+include tools/Makefile.am
+
+MRPROPERFILES = \
+	aclocal.m4 \
+	config.h.in \
+	config.h.in~ \
+	configure \
+	Makefile.in \
+	build-aux/config.guess \
+	build-aux/config.sub \
+	build-aux/depcomp \
+	build-aux/install-sh \
+	build-aux/ltmain.sh \
+	build-aux/missing \
+	doc/Makefile.in \
+	doc/doxygen.log \
+	Makefile.in \
+	lemon/Makefile.in \
+	test/Makefile.in \
+	benchmark/Makefile.in \
+	demo/Makefile.in
+
+mrproper:
+	$(MAKE) $(AM_MAKEFLAGS) maintainer-clean
+	-rm -f $(MRPROPERFILES)
+
+dist-bz2: dist
+	zcat $(PACKAGE)-$(VERSION).tar.gz | \
+	bzip2 --best -c > $(PACKAGE)-$(VERSION).tar.bz2
+
+distcheck-bz2: distcheck
+	zcat $(PACKAGE)-$(VERSION).tar.gz | \
+	bzip2 --best -c > $(PACKAGE)-$(VERSION).tar.bz2
+
+.PHONY: mrproper dist-bz2 distcheck-bz2
diff --git a/benchmark/Makefile b/benchmark/Makefile
new file mode 100644
--- /dev/null
+++ b/benchmark/Makefile
@@ -0,0 +1,2 @@
+all:
+	$(MAKE) -C ..
diff --git a/benchmark/Makefile.am b/benchmark/Makefile.am
new file mode 100644
--- /dev/null
+++ b/benchmark/Makefile.am
@@ -0,0 +1,10 @@
+EXTRA_DIST += \
+        benchmark/Makefile
+
+if WANT_BENCHMARK
+
+noinst_HEADERS +=
+
+noinst_PROGRAMS +=
+
+endif WANT_BENCHMARK
diff --git a/configure.ac b/configure.ac
new file mode 100644
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,156 @@
+dnl Process this file with autoconf to produce a configure script.
+
+dnl Version information.
+m4_define([lemon_version_major], [0])
+m4_define([lemon_version_minor], [6])
+m4_define([lemon_version_micro], [90])
+m4_define([lemon_version_nano], [])
+m4_define([lemon_version_tag], [hg])
+m4_define([lemon_hg_revision], [m4_normalize(esyscmd([hg tip |grep ^changeset |cut -d ':' -f 3]))])
+m4_define([lemon_version], [lemon_version_major().lemon_version_minor()ifelse(lemon_version_micro(), [], [], [.lemon_version_micro()])ifelse(lemon_version_nano(), [], [], [.lemon_version_nano()])ifelse(lemon_version_tag(), [], [], lemon_version_tag(), [hg], [[_]lemon_version_tag()[]lemon_hg_revision()], [[_]lemon_version_tag()])])
+
+AC_PREREQ([2.59])
+AC_INIT([LEMON], [lemon_version()], [etik-ol@cs.elte.hu], [lemon])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_MACRO_DIR([m4])
+AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])
+AC_CONFIG_SRCDIR([lemon/list_graph.h])
+AC_CONFIG_HEADERS([config.h lemon/config.h])
+
+lx_cmdline_cxxflags_set=${CXXFLAGS+set}
+
+dnl Checks for programs.
+AC_PROG_CXX
+AC_PROG_CXXCPP
+AC_PROG_INSTALL
+AC_DISABLE_SHARED
+AC_PROG_LIBTOOL
+
+if test x"$lx_cmdline_cxxflags_set" != x"set" -a "$GXX" = yes; then
+  CXXFLAGS="$CXXFLAGS -Wall -W -Wall -W -Wunused -Wformat=2 -Wctor-dtor-privacy -Wnon-virtual-dtor -Wno-char-subscripts -Wwrite-strings -Wno-char-subscripts -Wreturn-type -Wcast-qual -Wcast-align -Wsign-promo -Woverloaded-virtual -Woverloaded-virtual -ansi -fno-strict-aliasing -Wold-style-cast -Wno-unknown-pragmas"
+fi
+
+AC_CHECK_PROG([doxygen_found],[doxygen],[yes],[no])
+
+dnl Checks for libraries.
+LX_CHECK_GLPK
+LX_CHECK_CPLEX
+LX_CHECK_SOPLEX
+
+dnl Enable/disable installing the documentation
+AC_ARG_ENABLE([doc],
+AS_HELP_STRING([--enable-doc@<:@=yes|no|full@:>@], [build the documentation (full enables internal documentation too) @<:@default=yes@:>@])
+AS_HELP_STRING([--disable-doc], [do not build the documentation]),
+              [], [enable_doc=yes])
+
+AC_MSG_CHECKING([whether to build the documention])
+case "$enable_doc" in
+  yes)
+    DOXYGEN_INTERNAL_DOCS=NO
+    AC_MSG_RESULT([yes])
+    ;;
+  full)
+    DOXYGEN_INTERNAL_DOCS=YES
+    AC_MSG_RESULT([full])
+    ;;
+  no)
+    DOXYGEN_INTERNAL_DOCS=NO
+    AC_MSG_RESULT([no])
+    ;;
+  *)
+    AC_MSG_ERROR([bad value $enable_doc for option --enable-doc])
+    ;;
+esac
+AC_SUBST(DOXYGEN_INTERNAL_DOCS)
+AM_CONDITIONAL([WANT_DOC], [test x"$enable_doc" != x"no"])
+
+dnl Disable/enable building the demo programs
+AC_ARG_ENABLE([demo],
+AS_HELP_STRING([--enable-demo], [build the demo programs])
+AS_HELP_STRING([--disable-demo], [do not build the demo programs @<:@default@:>@]),
+              [], [enable_demo=no])
+AC_MSG_CHECKING([whether to build the demo programs])
+if test x"$enable_demo" != x"no"; then
+  AC_MSG_RESULT([yes])
+else
+  AC_MSG_RESULT([no])
+fi
+AM_CONDITIONAL([WANT_DEMO], [test x"$enable_demo" != x"no"])
+
+dnl Disable/enable building the binary tools
+AC_ARG_ENABLE([tools],
+AS_HELP_STRING([--enable-tools], [build additional tools @<:@default@:>@])
+AS_HELP_STRING([--disable-tools], [do not build additional tools]),
+              [], [enable_tools=yes])
+AC_MSG_CHECKING([whether to build the additional tools])
+if test x"$enable_tools" != x"no"; then
+  AC_MSG_RESULT([yes])
+else
+  AC_MSG_RESULT([no])
+fi
+AM_CONDITIONAL([WANT_TOOLS], [test x"$enable_tools" != x"no"])
+
+dnl Disable/enable building the benchmarks
+AC_ARG_ENABLE([benchmark],
+AS_HELP_STRING([--enable-benchmark], [build the benchmarks])
+AS_HELP_STRING([--disable-benchmark], [do not build the benchmarks @<:@default@:>@]),
+              [], [enable_benchmark=no])
+AC_MSG_CHECKING([whether to build the benchmarks])
+if test x"$enable_benchmark" != x"no"; then
+  AC_MSG_RESULT([yes])
+else
+  AC_MSG_RESULT([no])
+fi
+AM_CONDITIONAL([WANT_BENCHMARK], [test x"$enable_benchmark" != x"no"])
+
+dnl Checks for header files.
+AC_CHECK_HEADERS(limits.h sys/time.h sys/times.h unistd.h)
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_C_INLINE
+AC_TYPE_SIZE_T
+AC_HEADER_TIME
+AC_STRUCT_TM
+
+dnl Checks for library functions.
+AC_HEADER_STDC
+AC_CHECK_FUNCS(gettimeofday times ctime_r)
+
+AC_CONFIG_FILES([
+Makefile
+doc/Doxyfile
+lemon/lemon.pc
+])
+
+AC_OUTPUT
+
+echo
+echo '****************************** SUMMARY ******************************'
+echo
+echo Package version............... : $PACKAGE-$VERSION
+echo
+echo C++ compiler.................. : $CXX
+echo C++ compiles flags............ : $CXXFLAGS
+echo
+echo GLPK support.................. : $lx_glpk_found
+echo CPLEX support................. : $lx_cplex_found
+echo SOPLEX support................ : $lx_soplex_found
+echo
+echo build benchmarks.............. : $enable_benchmark
+echo build demo programs........... : $enable_demo
+echo build additional tools........ : $enable_tools
+echo
+echo The packace will be installed in
+echo -n '  '
+echo $prefix.
+echo
+echo The documentation will be installed in
+echo -n '  '
+eval echo ${datadir}/doc/$PACKAGE.
+echo
+echo '*********************************************************************'
+
+echo
+echo configure complete, now type \'make\' and then \'make install\'.
+echo
diff --git a/demo/Makefile b/demo/Makefile
new file mode 100644
--- /dev/null
+++ b/demo/Makefile
@@ -0,0 +1,2 @@
+all:
+	$(MAKE) -C ..
diff --git a/demo/Makefile.am b/demo/Makefile.am
new file mode 100644
--- /dev/null
+++ b/demo/Makefile.am
@@ -0,0 +1,8 @@
+EXTRA_DIST += \
+	demo/Makefile
+
+if WANT_DEMO
+
+noinst_PROGRAMS +=
+
+endif WANT_DEMO
diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
new file mode 100644
--- /dev/null
+++ b/doc/Doxyfile.in
@@ -0,0 +1,1227 @@
+# Doxyfile 1.4.2
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project
+#
+# All text after a hash (#) is considered a comment and will be ignored
+# The format is:
+#       TAG = value [value, ...]
+# For lists items can also be appended using:
+#       TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (" ")
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded 
+# by quotes) that should identify the project.
+
+PROJECT_NAME           = @PACKAGE_NAME@
+
+# The PROJECT_NUMBER tag can be used to enter a project or revision number. 
+# This could be handy for archiving the generated documentation or 
+# if some version control system is used.
+
+PROJECT_NUMBER         = @PACKAGE_VERSION@
+
+# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
+# base path where the generated documentation will be put. 
+# If a relative path is entered, it will be relative to the location 
+# where doxygen was started. If left blank the current directory will be used.
+
+OUTPUT_DIRECTORY       = 
+
+# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create 
+# 4096 sub-directories (in 2 levels) under the output directory of each output 
+# format and will distribute the generated files over these directories. 
+# Enabling this option can be useful when feeding doxygen a huge amount of 
+# source files, where putting all generated files in the same directory would 
+# otherwise cause performance problems for the file system.
+
+CREATE_SUBDIRS         = NO
+
+# The OUTPUT_LANGUAGE tag is used to specify the language in which all 
+# documentation generated by doxygen is written. Doxygen will use this 
+# information to generate all constant output in the proper language. 
+# The default language is English, other supported languages are: 
+# Brazilian, Catalan, Chinese, Chinese-Traditional, Croatian, Czech, Danish, 
+# Dutch, Finnish, French, German, Greek, Hungarian, Italian, Japanese, 
+# Japanese-en (Japanese with English messages), Korean, Korean-en, Norwegian, 
+# Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovene, Spanish, 
+# Swedish, and Ukrainian.
+
+OUTPUT_LANGUAGE        = English
+
+# This tag can be used to specify the encoding used in the generated output. 
+# The encoding is not always determined by the language that is chosen, 
+# but also whether or not the output is meant for Windows or non-Windows users. 
+# In case there is a difference, setting the USE_WINDOWS_ENCODING tag to YES 
+# forces the Windows encoding (this is the default for the Windows binary), 
+# whereas setting the tag to NO uses a Unix-style encoding (the default for 
+# all platforms other than Windows).
+
+USE_WINDOWS_ENCODING   = NO
+
+# If the BRIEF_MEMBER_DESC tag is set to YES (the default) Doxygen will 
+# include brief member descriptions after the members that are listed in 
+# the file and class documentation (similar to JavaDoc). 
+# Set to NO to disable this.
+
+BRIEF_MEMBER_DESC      = YES
+
+# If the REPEAT_BRIEF tag is set to YES (the default) Doxygen will prepend 
+# the brief description of a member or function before the detailed description. 
+# Note: if both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the 
+# brief descriptions will be completely suppressed.
+
+REPEAT_BRIEF           = NO
+
+# This tag implements a quasi-intelligent brief description abbreviator 
+# that is used to form the text in various listings. Each string 
+# in this list, if found as the leading text of the brief description, will be 
+# stripped from the text and the result after processing the whole list, is 
+# used as the annotated text. Otherwise, the brief description is used as-is. 
+# If left blank, the following values are used ("$name" is automatically 
+# replaced with the name of the entity): "The $name class" "The $name widget" 
+# "The $name file" "is" "provides" "specifies" "contains" 
+# "represents" "a" "an" "the"
+
+ABBREVIATE_BRIEF       = 
+
+# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then 
+# Doxygen will generate a detailed section even if there is only a brief 
+# description.
+
+ALWAYS_DETAILED_SEC    = NO
+
+# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all 
+# inherited members of a class in the documentation of that class as if those 
+# members were ordinary class members. Constructors, destructors and assignment 
+# operators of the base classes will not be shown.
+
+INLINE_INHERITED_MEMB  = NO
+
+# If the FULL_PATH_NAMES tag is set to YES then Doxygen will prepend the full 
+# path before files name in the file list and in the header files. If set 
+# to NO the shortest path that makes the file name unique will be used.
+
+FULL_PATH_NAMES        = YES
+
+# If the FULL_PATH_NAMES tag is set to YES then the STRIP_FROM_PATH tag 
+# can be used to strip a user-defined part of the path. Stripping is 
+# only done if one of the specified strings matches the left-hand part of 
+# the path. The tag can be used to show relative paths in the file list. 
+# If left blank the directory from which doxygen is run is used as the 
+# path to strip.
+
+STRIP_FROM_PATH        = @abs_top_srcdir@
+
+# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of 
+# the path mentioned in the documentation of a class, which tells 
+# the reader which header file to include in order to use a class. 
+# If left blank only the name of the header file containing the class 
+# definition is used. Otherwise one should specify the include paths that 
+# are normally passed to the compiler using the -I flag.
+
+STRIP_FROM_INC_PATH    = @abs_top_srcdir@
+
+# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter 
+# (but less readable) file names. This can be useful is your file systems 
+# doesn't support long names like on DOS, Mac, or CD-ROM.
+
+SHORT_NAMES            = YES
+
+# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen 
+# will interpret the first line (until the first dot) of a JavaDoc-style 
+# comment as the brief description. If set to NO, the JavaDoc 
+# comments will behave just like the Qt-style comments (thus requiring an 
+# explicit @brief command for a brief description.
+
+JAVADOC_AUTOBRIEF      = NO
+
+# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make Doxygen 
+# treat a multi-line C++ special comment block (i.e. a block of //! or /// 
+# comments) as a brief description. This used to be the default behaviour. 
+# The new default is to treat a multi-line C++ comment block as a detailed 
+# description. Set this tag to YES if you prefer the old behaviour instead.
+
+MULTILINE_CPP_IS_BRIEF = NO
+
+# If the DETAILS_AT_TOP tag is set to YES then Doxygen 
+# will output the detailed description near the top, like JavaDoc.
+# If set to NO, the detailed description appears after the member 
+# documentation.
+
+DETAILS_AT_TOP         = YES
+
+# If the INHERIT_DOCS tag is set to YES (the default) then an undocumented 
+# member inherits the documentation from any documented member that it 
+# re-implements.
+
+INHERIT_DOCS           = NO
+
+# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC 
+# tag is set to YES, then doxygen will reuse the documentation of the first 
+# member in the group (if any) for the other members of the group. By default 
+# all members of a group must be documented explicitly.
+
+DISTRIBUTE_GROUP_DOC   = NO
+
+# If the SEPARATE_MEMBER_PAGES tag is set to YES, then doxygen will produce 
+# a new page for each member. If set to NO, the documentation of a member will 
+# be part of the file/class/namespace that contains it.
+
+SEPARATE_MEMBER_PAGES  = NO
+
+# The TAB_SIZE tag can be used to set the number of spaces in a tab. 
+# Doxygen uses this value to replace tabs by spaces in code fragments.
+
+TAB_SIZE               = 8
+
+# This tag can be used to specify a number of aliases that acts 
+# as commands in the documentation. An alias has the form "name=value". 
+# For example adding "sideeffect=\par Side Effects:\n" will allow you to 
+# put the command \sideeffect (or @sideeffect) in the documentation, which 
+# will result in a user-defined paragraph with heading "Side Effects:". 
+# You can put \n's in the value part of an alias to insert newlines.
+
+ALIASES                = 
+
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C 
+# sources only. Doxygen will then generate output that is more tailored for C. 
+# For instance, some of the names that are used will be different. The list 
+# of all members will be omitted, etc.
+
+OPTIMIZE_OUTPUT_FOR_C  = NO
+
+# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java sources 
+# only. Doxygen will then generate output that is more tailored for Java. 
+# For instance, namespaces will be presented as packages, qualified scopes 
+# will look different, etc.
+
+OPTIMIZE_OUTPUT_JAVA   = NO
+
+# Set the SUBGROUPING tag to YES (the default) to allow class member groups of 
+# the same type (for instance a group of public functions) to be put as a 
+# subgroup of that type (e.g. under the Public Functions section). Set it to 
+# NO to prevent subgrouping. Alternatively, this can be done per class using 
+# the \nosubgrouping command.
+
+SUBGROUPING            = YES
+
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+
+# If the EXTRACT_ALL tag is set to YES doxygen will assume all entities in 
+# documentation are documented, even if no documentation was available. 
+# Private class members and static file members will be hidden unless 
+# the EXTRACT_PRIVATE and EXTRACT_STATIC tags are set to YES
+
+EXTRACT_ALL            = NO
+
+# If the EXTRACT_PRIVATE tag is set to YES all private members of a class 
+# will be included in the documentation.
+
+EXTRACT_PRIVATE        = YES
+
+# If the EXTRACT_STATIC tag is set to YES all static members of a file 
+# will be included in the documentation.
+
+EXTRACT_STATIC         = YES
+
+# If the EXTRACT_LOCAL_CLASSES tag is set to YES classes (and structs) 
+# defined locally in source files will be included in the documentation. 
+# If set to NO only classes defined in header files are included.
+
+EXTRACT_LOCAL_CLASSES  = NO
+
+# This flag is only useful for Objective-C code. When set to YES local 
+# methods, which are defined in the implementation section but not in 
+# the interface are included in the documentation. 
+# If set to NO (the default) only methods in the interface are included.
+
+EXTRACT_LOCAL_METHODS  = NO
+
+# If the HIDE_UNDOC_MEMBERS tag is set to YES, Doxygen will hide all 
+# undocumented members of documented classes, files or namespaces. 
+# If set to NO (the default) these members will be included in the 
+# various overviews, but no documentation section is generated. 
+# This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_MEMBERS     = YES
+
+# If the HIDE_UNDOC_CLASSES tag is set to YES, Doxygen will hide all 
+# undocumented classes that are normally visible in the class hierarchy. 
+# If set to NO (the default) these classes will be included in the various 
+# overviews. This option has no effect if EXTRACT_ALL is enabled.
+
+HIDE_UNDOC_CLASSES     = YES
+
+# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, Doxygen will hide all 
+# friend (class|struct|union) declarations. 
+# If set to NO (the default) these declarations will be included in the 
+# documentation.
+
+HIDE_FRIEND_COMPOUNDS  = NO
+
+# If the HIDE_IN_BODY_DOCS tag is set to YES, Doxygen will hide any 
+# documentation blocks found inside the body of a function. 
+# If set to NO (the default) these blocks will be appended to the 
+# function's detailed documentation block.
+
+HIDE_IN_BODY_DOCS      = NO
+
+# The INTERNAL_DOCS tag determines if documentation 
+# that is typed after a \internal command is included. If the tag is set 
+# to NO (the default) then the documentation will be excluded. 
+# Set it to YES to include the internal documentation.
+
+INTERNAL_DOCS          = @DOXYGEN_INTERNAL_DOCS@
+
+# If the CASE_SENSE_NAMES tag is set to NO then Doxygen will only generate 
+# file names in lower-case letters. If set to YES upper-case letters are also 
+# allowed. This is useful if you have classes or files whose names only differ 
+# in case and if your file system supports case sensitive file names. Windows 
+# and Mac users are advised to set this option to NO.
+
+CASE_SENSE_NAMES       = YES
+
+# If the HIDE_SCOPE_NAMES tag is set to NO (the default) then Doxygen 
+# will show members with their full class and namespace scopes in the 
+# documentation. If set to YES the scope will be hidden.
+
+HIDE_SCOPE_NAMES       = YES
+
+# If the SHOW_INCLUDE_FILES tag is set to YES (the default) then Doxygen 
+# will put a list of the files that are included by a file in the documentation 
+# of that file.
+
+SHOW_INCLUDE_FILES     = YES
+
+# If the INLINE_INFO tag is set to YES (the default) then a tag [inline] 
+# is inserted in the documentation for inline members.
+
+INLINE_INFO            = YES
+
+# If the SORT_MEMBER_DOCS tag is set to YES (the default) then doxygen 
+# will sort the (detailed) documentation of file and class members 
+# alphabetically by member name. If set to NO the members will appear in 
+# declaration order.
+
+SORT_MEMBER_DOCS       = NO
+
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the 
+# brief documentation of file, namespace and class members alphabetically 
+# by member name. If set to NO (the default) the members will appear in 
+# declaration order.
+
+SORT_BRIEF_DOCS        = NO
+
+# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be 
+# sorted by fully-qualified names, including namespaces. If set to 
+# NO (the default), the class list will be sorted only by class name, 
+# not including the namespace part. 
+# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
+# Note: This option applies only to the class list, not to the 
+# alphabetical list.
+
+SORT_BY_SCOPE_NAME     = NO
+
+# The GENERATE_TODOLIST tag can be used to enable (YES) or 
+# disable (NO) the todo list. This list is created by putting \todo 
+# commands in the documentation.
+
+GENERATE_TODOLIST      = YES
+
+# The GENERATE_TESTLIST tag can be used to enable (YES) or 
+# disable (NO) the test list. This list is created by putting \test 
+# commands in the documentation.
+
+GENERATE_TESTLIST      = YES
+
+# The GENERATE_BUGLIST tag can be used to enable (YES) or 
+# disable (NO) the bug list. This list is created by putting \bug 
+# commands in the documentation.
+
+GENERATE_BUGLIST       = YES
+
+# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or 
+# disable (NO) the deprecated list. This list is created by putting 
+# \deprecated commands in the documentation.
+
+GENERATE_DEPRECATEDLIST= YES
+
+# The ENABLED_SECTIONS tag can be used to enable conditional 
+# documentation sections, marked by \if sectionname ... \endif.
+
+ENABLED_SECTIONS       = 
+
+# The MAX_INITIALIZER_LINES tag determines the maximum number of lines 
+# the initial value of a variable or define consists of for it to appear in 
+# the documentation. If the initializer consists of more lines than specified 
+# here it will be hidden. Use a value of 0 to hide initializers completely. 
+# The appearance of the initializer of individual variables and defines in the 
+# documentation can be controlled using \showinitializer or \hideinitializer 
+# command in the documentation regardless of this setting.
+
+MAX_INITIALIZER_LINES  = 5
+
+# Set the SHOW_USED_FILES tag to NO to disable the list of files generated 
+# at the bottom of the documentation of classes and structs. If set to YES the 
+# list will mention the files that were used to generate the documentation.
+
+SHOW_USED_FILES        = YES
+
+# If the sources in your project are distributed over multiple directories 
+# then setting the SHOW_DIRECTORIES tag to YES will show the directory hierarchy 
+# in the documentation.
+
+SHOW_DIRECTORIES       = YES
+
+# The FILE_VERSION_FILTER tag can be used to specify a program or script that 
+# doxygen should invoke to get the current version for each file (typically from the 
+# version control system). Doxygen will invoke the program by executing (via 
+# popen()) the command <command> <input-file>, where <command> is the value of 
+# the FILE_VERSION_FILTER tag, and <input-file> is the name of an input file 
+# provided by doxygen. Whatever the progam writes to standard output 
+# is used as the file version. See the manual for examples.
+
+FILE_VERSION_FILTER    = 
+
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+
+# The QUIET tag can be used to turn on/off the messages that are generated 
+# by doxygen. Possible values are YES and NO. If left blank NO is used.
+
+QUIET                  = NO
+
+# The WARNINGS tag can be used to turn on/off the warning messages that are 
+# generated by doxygen. Possible values are YES and NO. If left blank 
+# NO is used.
+
+WARNINGS               = YES
+
+# If WARN_IF_UNDOCUMENTED is set to YES, then doxygen will generate warnings 
+# for undocumented members. If EXTRACT_ALL is set to YES then this flag will 
+# automatically be disabled.
+
+WARN_IF_UNDOCUMENTED   = YES
+
+# If WARN_IF_DOC_ERROR is set to YES, doxygen will generate warnings for 
+# potential errors in the documentation, such as not documenting some 
+# parameters in a documented function, or documenting parameters that 
+# don't exist or using markup commands wrongly.
+
+WARN_IF_DOC_ERROR      = YES
+
+# This WARN_NO_PARAMDOC option can be abled to get warnings for 
+# functions that are documented, but have no documentation for their parameters 
+# or return value. If set to NO (the default) doxygen will only warn about 
+# wrong or incomplete parameter documentation, but not about the absence of 
+# documentation.
+
+WARN_NO_PARAMDOC       = NO
+
+# The WARN_FORMAT tag determines the format of the warning messages that 
+# doxygen can produce. The string should contain the $file, $line, and $text 
+# tags, which will be replaced by the file and line number from which the 
+# warning originated and the warning text. Optionally the format may contain 
+# $version, which will be replaced by the version of the file (if it could 
+# be obtained via FILE_VERSION_FILTER)
+
+WARN_FORMAT            = "$file:$line: $text"
+
+# The WARN_LOGFILE tag can be used to specify a file to which warning 
+# and error messages should be written. If left blank the output is written 
+# to stderr.
+
+WARN_LOGFILE           = doxygen.log
+
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+
+# The INPUT tag can be used to specify the files and/or directories that contain 
+# documented source files. You may enter file names like "myfile.cpp" or 
+# directories like "/usr/src/myproject". Separate the files or directories 
+# with spaces.
+
+INPUT                  = @abs_top_srcdir@/doc \
+                         @abs_top_srcdir@/lemon \
+                         @abs_top_srcdir@/lemon/bits \
+                         @abs_top_srcdir@/lemon/concepts \
+                         @abs_top_srcdir@/demo \
+                         @abs_top_srcdir@/tools \
+                         @abs_top_srcdir@/test/test_tools.h
+
+# If the value of the INPUT tag contains directories, you can use the 
+# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
+# and *.h) to filter out the source-files in the directories. If left 
+# blank the following patterns are tested: 
+# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx 
+# *.hpp *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm
+
+FILE_PATTERNS          = *.h *.cc *.dox
+
+# The RECURSIVE tag can be used to turn specify whether or not subdirectories 
+# should be searched for input files as well. Possible values are YES and NO. 
+# If left blank NO is used.
+
+RECURSIVE              = NO
+
+# The EXCLUDE tag can be used to specify files and/or directories that should 
+# excluded from the INPUT source files. This way you can easily exclude a 
+# subdirectory from a directory tree whose root is specified with the INPUT tag.
+
+EXCLUDE                = 
+
+# The EXCLUDE_SYMLINKS tag can be used select whether or not files or 
+# directories that are symbolic links (a Unix filesystem feature) are excluded 
+# from the input.
+
+EXCLUDE_SYMLINKS       = NO
+
+# If the value of the INPUT tag contains directories, you can use the 
+# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude 
+# certain files from those directories.
+
+EXCLUDE_PATTERNS       = 
+
+# The EXAMPLE_PATH tag can be used to specify one or more files or 
+# directories that contain example code fragments that are included (see 
+# the \include command).
+
+EXAMPLE_PATH           = @abs_top_srcdir@/demo \
+                         @abs_top_srcdir@/LICENSE \
+                         @abs_top_srcdir@/doc
+
+# If the value of the EXAMPLE_PATH tag contains directories, you can use the 
+# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp 
+# and *.h) to filter out the source-files in the directories. If left 
+# blank all files are included.
+
+EXAMPLE_PATTERNS       = 
+
+# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be 
+# searched for input files to be used with the \include or \dontinclude 
+# commands irrespective of the value of the RECURSIVE tag. 
+# Possible values are YES and NO. If left blank NO is used.
+
+EXAMPLE_RECURSIVE      = NO
+
+# The IMAGE_PATH tag can be used to specify one or more files or 
+# directories that contain image that are included in the documentation (see 
+# the \image command).
+
+IMAGE_PATH             = @abs_top_srcdir@/doc/images
+
+# The INPUT_FILTER tag can be used to specify a program that doxygen should 
+# invoke to filter for each input file. Doxygen will invoke the filter program 
+# by executing (via popen()) the command <filter> <input-file>, where <filter> 
+# is the value of the INPUT_FILTER tag, and <input-file> is the name of an 
+# input file. Doxygen will then use the output that the filter program writes 
+# to standard output.  If FILTER_PATTERNS is specified, this tag will be 
+# ignored.
+
+INPUT_FILTER           = 
+
+# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern 
+# basis.  Doxygen will compare the file name with each pattern and apply the 
+# filter if there is a match.  The filters are a list of the form: 
+# pattern=filter (like *.cpp=my_cpp_filter). See INPUT_FILTER for further 
+# info on how filters are used. If FILTER_PATTERNS is empty, INPUT_FILTER 
+# is applied to all files.
+
+FILTER_PATTERNS        = 
+
+# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using 
+# INPUT_FILTER) will be used to filter the input files when producing source 
+# files to browse (i.e. when SOURCE_BROWSER is set to YES).
+
+FILTER_SOURCE_FILES    = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+
+# If the SOURCE_BROWSER tag is set to YES then a list of source files will 
+# be generated. Documented entities will be cross-referenced with these sources. 
+# Note: To get rid of all source code in the generated output, make sure also 
+# VERBATIM_HEADERS is set to NO.
+
+SOURCE_BROWSER         = NO
+
+# Setting the INLINE_SOURCES tag to YES will include the body 
+# of functions and classes directly in the documentation.
+
+INLINE_SOURCES         = NO
+
+# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct 
+# doxygen to hide any special comment blocks from generated source code 
+# fragments. Normal C and C++ comments will always remain visible.
+
+STRIP_CODE_COMMENTS    = YES
+
+# If the REFERENCED_BY_RELATION tag is set to YES (the default) 
+# then for each documented function all documented 
+# functions referencing it will be listed.
+
+REFERENCED_BY_RELATION = NO
+
+# If the REFERENCES_RELATION tag is set to YES (the default) 
+# then for each documented function all documented entities 
+# called/used by that function will be listed.
+
+REFERENCES_RELATION    = NO
+
+# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen 
+# will generate a verbatim copy of the header file for each class for 
+# which an include is specified. Set to NO to disable this.
+
+VERBATIM_HEADERS       = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+
+# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index 
+# of all compounds will be generated. Enable this if the project 
+# contains a lot of classes, structs, unions or interfaces.
+
+ALPHABETICAL_INDEX     = YES
+
+# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then 
+# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns 
+# in which this list will be split (can be a number in the range [1..20])
+
+COLS_IN_ALPHA_INDEX    = 2
+
+# In case all classes in a project start with a common prefix, all 
+# classes will be put under the same header in the alphabetical index. 
+# The IGNORE_PREFIX tag can be used to specify one or more prefixes that 
+# should be ignored while generating the index headers.
+
+IGNORE_PREFIX          = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_HTML tag is set to YES (the default) Doxygen will 
+# generate HTML output.
+
+GENERATE_HTML          = YES
+
+# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `html' will be used as the default path.
+
+HTML_OUTPUT            = html
+
+# The HTML_FILE_EXTENSION tag can be used to specify the file extension for 
+# each generated HTML page (for example: .htm,.php,.asp). If it is left blank 
+# doxygen will generate files with .html extension.
+
+HTML_FILE_EXTENSION    = .html
+
+# The HTML_HEADER tag can be used to specify a personal HTML header for 
+# each generated HTML page. If it is left blank doxygen will generate a 
+# standard header.
+
+HTML_HEADER            = 
+
+# The HTML_FOOTER tag can be used to specify a personal HTML footer for 
+# each generated HTML page. If it is left blank doxygen will generate a 
+# standard footer.
+
+HTML_FOOTER            = 
+
+# The HTML_STYLESHEET tag can be used to specify a user-defined cascading 
+# style sheet that is used by each HTML page. It can be used to 
+# fine-tune the look of the HTML output. If the tag is left blank doxygen 
+# will generate a default style sheet. Note that doxygen will try to copy 
+# the style sheet file to the HTML output directory, so don't put your own 
+# stylesheet in the HTML output directory as well, or it will be erased!
+
+HTML_STYLESHEET        = 
+
+# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes, 
+# files or namespaces will be aligned in HTML using tables. If set to 
+# NO a bullet list will be used.
+
+HTML_ALIGN_MEMBERS     = YES
+
+# If the GENERATE_HTMLHELP tag is set to YES, additional index files 
+# will be generated that can be used as input for tools like the 
+# Microsoft HTML help workshop to generate a compressed HTML help file (.chm) 
+# of the generated HTML documentation.
+
+GENERATE_HTMLHELP      = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can 
+# be used to specify the file name of the resulting .chm file. You 
+# can add a path in front of the file if the result should not be 
+# written to the html output directory.
+
+CHM_FILE               = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can 
+# be used to specify the location (absolute path including file name) of 
+# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run 
+# the HTML help compiler on the generated index.hhp.
+
+HHC_LOCATION           = 
+
+# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag 
+# controls if a separate .chi index file is generated (YES) or that 
+# it should be included in the master .chm file (NO).
+
+GENERATE_CHI           = NO
+
+# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag 
+# controls whether a binary table of contents is generated (YES) or a 
+# normal table of contents (NO) in the .chm file.
+
+BINARY_TOC             = NO
+
+# The TOC_EXPAND flag can be set to YES to add extra items for group members 
+# to the contents of the HTML help documentation and to the tree view.
+
+TOC_EXPAND             = NO
+
+# The DISABLE_INDEX tag can be used to turn on/off the condensed index at 
+# top of each HTML page. The value NO (the default) enables the index and 
+# the value YES disables it.
+
+DISABLE_INDEX          = NO
+
+# This tag can be used to set the number of enum values (range [1..20]) 
+# that doxygen will group on one line in the generated HTML documentation.
+
+ENUM_VALUES_PER_LINE   = 4
+
+# If the GENERATE_TREEVIEW tag is set to YES, a side panel will be
+# generated containing a tree-like index structure (just like the one that 
+# is generated for HTML Help). For this to work a browser that supports 
+# JavaScript, DHTML, CSS and frames is required (for instance Mozilla 1.0+, 
+# Netscape 6.0+, Internet explorer 5.0+, or Konqueror). Windows users are 
+# probably better off using the HTML help feature.
+
+GENERATE_TREEVIEW      = YES
+
+# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be 
+# used to set the initial width (in pixels) of the frame in which the tree 
+# is shown.
+
+TREEVIEW_WIDTH         = 250
+
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will 
+# generate Latex output.
+
+GENERATE_LATEX         = NO
+
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `latex' will be used as the default path.
+
+LATEX_OUTPUT           = latex
+
+# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be 
+# invoked. If left blank `latex' will be used as the default command name.
+
+LATEX_CMD_NAME         = latex
+
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to 
+# generate index for LaTeX. If left blank `makeindex' will be used as the 
+# default command name.
+
+MAKEINDEX_CMD_NAME     = makeindex
+
+# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact 
+# LaTeX documents. This may be useful for small projects and may help to 
+# save some trees in general.
+
+COMPACT_LATEX          = YES
+
+# The PAPER_TYPE tag can be used to set the paper type that is used 
+# by the printer. Possible values are: a4, a4wide, letter, legal and 
+# executive. If left blank a4wide will be used.
+
+PAPER_TYPE             = a4wide
+
+# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX 
+# packages that should be included in the LaTeX output.
+
+EXTRA_PACKAGES         = amsmath \
+                         amssymb
+
+# The LATEX_HEADER tag can be used to specify a personal LaTeX header for 
+# the generated latex document. The header should contain everything until 
+# the first chapter. If it is left blank doxygen will generate a 
+# standard header. Notice: only use this tag if you know what you are doing!
+
+LATEX_HEADER           = 
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated 
+# is prepared for conversion to pdf (using ps2pdf). The pdf file will 
+# contain links (just like the HTML output) instead of page references 
+# This makes the output suitable for online browsing using a pdf viewer.
+
+PDF_HYPERLINKS         = YES
+
+# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of 
+# plain latex in the generated Makefile. Set this option to YES to get a 
+# higher quality PDF documentation.
+
+USE_PDFLATEX           = YES
+
+# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode. 
+# command to the generated LaTeX files. This will instruct LaTeX to keep 
+# running if errors occur, instead of asking the user for help. 
+# This option is also used when generating formulas in HTML.
+
+LATEX_BATCHMODE        = NO
+
+# If LATEX_HIDE_INDICES is set to YES then doxygen will not 
+# include the index chapters (such as File Index, Compound Index, etc.) 
+# in the output.
+
+LATEX_HIDE_INDICES     = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output 
+# The RTF output is optimized for Word 97 and may not look very pretty with 
+# other RTF readers or editors.
+
+GENERATE_RTF           = NO
+
+# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `rtf' will be used as the default path.
+
+RTF_OUTPUT             = rtf
+
+# If the COMPACT_RTF tag is set to YES Doxygen generates more compact 
+# RTF documents. This may be useful for small projects and may help to 
+# save some trees in general.
+
+COMPACT_RTF            = NO
+
+# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated 
+# will contain hyperlink fields. The RTF file will 
+# contain links (just like the HTML output) instead of page references. 
+# This makes the output suitable for online browsing using WORD or other 
+# programs which support those fields. 
+# Note: wordpad (write) and others do not support links.
+
+RTF_HYPERLINKS         = NO
+
+# Load stylesheet definitions from file. Syntax is similar to doxygen's 
+# config file, i.e. a series of assignments. You only have to provide 
+# replacements, missing definitions are set to their default value.
+
+RTF_STYLESHEET_FILE    = 
+
+# Set optional variables used in the generation of an rtf document. 
+# Syntax is similar to doxygen's config file.
+
+RTF_EXTENSIONS_FILE    = 
+
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_MAN tag is set to YES (the default) Doxygen will 
+# generate man pages
+
+GENERATE_MAN           = NO
+
+# The MAN_OUTPUT tag is used to specify where the man pages will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `man' will be used as the default path.
+
+MAN_OUTPUT             = man
+
+# The MAN_EXTENSION tag determines the extension that is added to 
+# the generated man pages (default is the subroutine's section .3)
+
+MAN_EXTENSION          = .3
+
+# If the MAN_LINKS tag is set to YES and Doxygen generates man output, 
+# then it will generate one additional man file for each entity 
+# documented in the real man page(s). These additional files 
+# only source the real man page, but without them the man command 
+# would be unable to find the correct page. The default is NO.
+
+MAN_LINKS              = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_XML tag is set to YES Doxygen will 
+# generate an XML file that captures the structure of 
+# the code including all documentation.
+
+GENERATE_XML           = NO
+
+# The XML_OUTPUT tag is used to specify where the XML pages will be put. 
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be 
+# put in front of it. If left blank `xml' will be used as the default path.
+
+XML_OUTPUT             = xml
+
+# The XML_SCHEMA tag can be used to specify an XML schema, 
+# which can be used by a validating XML parser to check the 
+# syntax of the XML files.
+
+XML_SCHEMA             = 
+
+# The XML_DTD tag can be used to specify an XML DTD, 
+# which can be used by a validating XML parser to check the 
+# syntax of the XML files.
+
+XML_DTD                = 
+
+# If the XML_PROGRAMLISTING tag is set to YES Doxygen will 
+# dump the program listings (including syntax highlighting 
+# and cross-referencing information) to the XML output. Note that 
+# enabling this will significantly increase the size of the XML output.
+
+XML_PROGRAMLISTING     = YES
+
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will 
+# generate an AutoGen Definitions (see autogen.sf.net) file 
+# that captures the structure of the code including all 
+# documentation. Note that this feature is still experimental 
+# and incomplete at the moment.
+
+GENERATE_AUTOGEN_DEF   = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_PERLMOD tag is set to YES Doxygen will 
+# generate a Perl module file that captures the structure of 
+# the code including all documentation. Note that this 
+# feature is still experimental and incomplete at the 
+# moment.
+
+GENERATE_PERLMOD       = NO
+
+# If the PERLMOD_LATEX tag is set to YES Doxygen will generate 
+# the necessary Makefile rules, Perl scripts and LaTeX code to be able 
+# to generate PDF and DVI output from the Perl module output.
+
+PERLMOD_LATEX          = NO
+
+# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be 
+# nicely formatted so it can be parsed by a human reader.  This is useful 
+# if you want to understand what is going on.  On the other hand, if this 
+# tag is set to NO the size of the Perl module output will be much smaller 
+# and Perl will parse it just the same.
+
+PERLMOD_PRETTY         = YES
+
+# The names of the make variables in the generated doxyrules.make file 
+# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. 
+# This is useful so different doxyrules.make files included by the same 
+# Makefile don't overwrite each other's variables.
+
+PERLMOD_MAKEVAR_PREFIX = 
+
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor   
+#---------------------------------------------------------------------------
+
+# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will 
+# evaluate all C-preprocessor directives found in the sources and include 
+# files.
+
+ENABLE_PREPROCESSING   = YES
+
+# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro 
+# names in the source code. If set to NO (the default) only conditional 
+# compilation will be performed. Macro expansion can be done in a controlled 
+# way by setting EXPAND_ONLY_PREDEF to YES.
+
+MACRO_EXPANSION        = NO
+
+# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES 
+# then the macro expansion is limited to the macros specified with the 
+# PREDEFINED and EXPAND_AS_PREDEFINED tags.
+
+EXPAND_ONLY_PREDEF     = NO
+
+# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files 
+# in the INCLUDE_PATH (see below) will be search if a #include is found.
+
+SEARCH_INCLUDES        = YES
+
+# The INCLUDE_PATH tag can be used to specify one or more directories that 
+# contain include files that are not input files but should be processed by 
+# the preprocessor.
+
+INCLUDE_PATH           = 
+
+# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard 
+# patterns (like *.h and *.hpp) to filter out the header-files in the 
+# directories. If left blank, the patterns specified with FILE_PATTERNS will 
+# be used.
+
+INCLUDE_FILE_PATTERNS  = 
+
+# The PREDEFINED tag can be used to specify one or more macro names that 
+# are defined before the preprocessor is started (similar to the -D option of 
+# gcc). The argument of the tag is a list of macros of the form: name 
+# or name=definition (no spaces). If the definition and the = are 
+# omitted =1 is assumed. To prevent a macro definition from being 
+# undefined via #undef or recursively expanded use the := operator 
+# instead of the = operator.
+
+PREDEFINED             = DOXYGEN
+
+# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then 
+# this tag can be used to specify a list of macro names that should be expanded. 
+# The macro definition that is found in the sources will be used. 
+# Use the PREDEFINED tag if you want to use a different macro definition.
+
+EXPAND_AS_DEFINED      = 
+
+# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then 
+# doxygen's preprocessor will remove all function-like macros that are alone 
+# on a line, have an all uppercase name, and do not end with a semicolon. Such 
+# function macros are typically used for boiler-plate code, and will confuse 
+# the parser if not removed.
+
+SKIP_FUNCTION_MACROS   = YES
+
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references   
+#---------------------------------------------------------------------------
+
+# The TAGFILES option can be used to specify one or more tagfiles. 
+# Optionally an initial location of the external documentation 
+# can be added for each tagfile. The format of a tag file without 
+# this location is as follows: 
+#   TAGFILES = file1 file2 ... 
+# Adding location for the tag files is done as follows: 
+#   TAGFILES = file1=loc1 "file2 = loc2" ... 
+# where "loc1" and "loc2" can be relative or absolute paths or 
+# URLs. If a location is present for each tag, the installdox tool 
+# does not have to be run to correct the links.
+# Note that each tag file must have a unique name
+# (where the name does NOT include the path)
+# If a tag file is not located in the directory in which doxygen 
+# is run, you must also specify the path to the tagfile here.
+
+TAGFILES               = "@abs_top_srcdir@/doc/libstdc++.tag = http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/"
+
+# When a file name is specified after GENERATE_TAGFILE, doxygen will create 
+# a tag file that is based on the input files it reads.
+
+GENERATE_TAGFILE       = html/lemon.tag
+
+# If the ALLEXTERNALS tag is set to YES all external classes will be listed 
+# in the class index. If set to NO only the inherited external classes 
+# will be listed.
+
+ALLEXTERNALS           = NO
+
+# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed 
+# in the modules index. If set to NO, only the current project's groups will 
+# be listed.
+
+EXTERNAL_GROUPS        = NO
+
+# The PERL_PATH should be the absolute path and name of the perl script 
+# interpreter (i.e. the result of `which perl').
+
+PERL_PATH              = /usr/bin/perl
+
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool   
+#---------------------------------------------------------------------------
+
+# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will 
+# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base 
+# or super classes. Setting the tag to NO turns the diagrams off. Note that 
+# this option is superseded by the HAVE_DOT option below. This is only a 
+# fallback. It is recommended to install and use dot, since it yields more 
+# powerful graphs.
+
+CLASS_DIAGRAMS         = NO
+
+# If set to YES, the inheritance and collaboration graphs will hide 
+# inheritance and usage relations if the target is undocumented 
+# or is not a class.
+
+HIDE_UNDOC_RELATIONS   = YES
+
+# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is 
+# available from the path. This tool is part of Graphviz, a graph visualization 
+# toolkit from AT&T and Lucent Bell Labs. The other options in this section 
+# have no effect if this option is set to NO (the default)
+
+HAVE_DOT               = YES
+
+# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for each documented class showing the direct and 
+# indirect inheritance relations. Setting this tag to YES will force the 
+# the CLASS_DIAGRAMS tag to NO.
+
+CLASS_GRAPH            = YES
+
+# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for each documented class showing the direct and 
+# indirect implementation dependencies (inheritance, containment, and 
+# class references variables) of the class with other documented classes.
+
+COLLABORATION_GRAPH    = NO
+
+# If the GROUP_GRAPHS and HAVE_DOT tags are set to YES then doxygen 
+# will generate a graph for groups, showing the direct groups dependencies
+
+GROUP_GRAPHS           = NO
+
+# If the UML_LOOK tag is set to YES doxygen will generate inheritance and 
+# collaboration diagrams in a style similar to the OMG's Unified Modeling 
+# Language.
+
+UML_LOOK               = NO
+
+# If set to YES, the inheritance and collaboration graphs will show the 
+# relations between templates and their instances.
+
+TEMPLATE_RELATIONS     = NO
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT 
+# tags are set to YES then doxygen will generate a graph for each documented 
+# file showing the direct and indirect include dependencies of the file with 
+# other documented files.
+
+INCLUDE_GRAPH          = NO
+
+# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and 
+# HAVE_DOT tags are set to YES then doxygen will generate a graph for each 
+# documented header file showing the documented files that directly or 
+# indirectly include this file.
+
+INCLUDED_BY_GRAPH      = NO
+
+# If the CALL_GRAPH and HAVE_DOT tags are set to YES then doxygen will 
+# generate a call dependency graph for every global function or class method. 
+# Note that enabling this option will significantly increase the time of a run. 
+# So in most cases it will be better to enable call graphs for selected 
+# functions only using the \callgraph command.
+
+CALL_GRAPH             = NO
+
+# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen 
+# will graphical hierarchy of all classes instead of a textual one.
+
+GRAPHICAL_HIERARCHY    = NO
+
+# If the DIRECTORY_GRAPH, SHOW_DIRECTORIES and HAVE_DOT tags are set to YES 
+# then doxygen will show the dependencies a directory has on other directories 
+# in a graphical way. The dependency relations are determined by the #include
+# relations between the files in the directories.
+
+DIRECTORY_GRAPH        = NO
+
+# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images 
+# generated by dot. Possible values are png, jpg, or gif
+# If left blank png will be used.
+
+DOT_IMAGE_FORMAT       = png
+
+# The tag DOT_PATH can be used to specify the path where the dot tool can be 
+# found. If left blank, it is assumed the dot tool can be found in the path.
+
+DOT_PATH               = 
+
+# The DOTFILE_DIRS tag can be used to specify one or more directories that 
+# contain dot files that are included in the documentation (see the 
+# \dotfile command).
+
+DOTFILE_DIRS           = 
+
+# The MAX_DOT_GRAPH_WIDTH tag can be used to set the maximum allowed width 
+# (in pixels) of the graphs generated by dot. If a graph becomes larger than 
+# this value, doxygen will try to truncate the graph, so that it fits within 
+# the specified constraint. Beware that most browsers cannot cope with very 
+# large images.
+
+MAX_DOT_GRAPH_WIDTH    = 1024
+
+# The MAX_DOT_GRAPH_HEIGHT tag can be used to set the maximum allows height 
+# (in pixels) of the graphs generated by dot. If a graph becomes larger than 
+# this value, doxygen will try to truncate the graph, so that it fits within 
+# the specified constraint. Beware that most browsers cannot cope with very 
+# large images.
+
+MAX_DOT_GRAPH_HEIGHT   = 1024
+
+# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the 
+# graphs generated by dot. A depth value of 3 means that only nodes reachable 
+# from the root by following a path via at most 3 edges will be shown. Nodes 
+# that lay further from the root node will be omitted. Note that setting this 
+# option to 1 or 2 may greatly reduce the computation time needed for large 
+# code bases. Also note that a graph may be further truncated if the graph's 
+# image dimensions are not sufficient to fit the graph (see MAX_DOT_GRAPH_WIDTH 
+# and MAX_DOT_GRAPH_HEIGHT). If 0 is used for the depth value (the default), 
+# the graph is not depth-constrained.
+
+MAX_DOT_GRAPH_DEPTH    = 0
+
+# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent 
+# background. This is disabled by default, which results in a white background. 
+# Warning: Depending on the platform used, enabling this option may lead to 
+# badly anti-aliased labels on the edges of a graph (i.e. they become hard to 
+# read).
+
+DOT_TRANSPARENT        = NO
+
+# Set the DOT_MULTI_TARGETS tag to YES allow dot to generate multiple output 
+# files in one run (i.e. multiple -o and -T options on the command line). This 
+# makes dot run faster, but since only newer versions of dot (>1.8.10) 
+# support this, this feature is disabled by default.
+
+DOT_MULTI_TARGETS      = NO
+
+# If the GENERATE_LEGEND tag is set to YES (the default) Doxygen will 
+# generate a legend page explaining the meaning of the various boxes and 
+# arrows in the dot generated graphs.
+
+GENERATE_LEGEND        = YES
+
+# If the DOT_CLEANUP tag is set to YES (the default) Doxygen will 
+# remove the intermediate dot files that are used to generate 
+# the various graphs.
+
+DOT_CLEANUP            = YES
+
+#---------------------------------------------------------------------------
+# Configuration::additions related to the search engine   
+#---------------------------------------------------------------------------
+
+# The SEARCHENGINE tag specifies whether or not a search engine should be 
+# used. If set to NO the values of all tags below this one will be ignored.
+
+SEARCHENGINE           = NO
diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,2 @@
+all:
+	$(MAKE) -C ..
diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,53 @@
+htmldir = $(datadir)/doc/$(PACKAGE)/html
+
+EXTRA_DIST += \
+	doc/Makefile \
+	doc/Doxyfile.in
+
+doc:
+	if test ${doxygen_found} = yes; then \
+	  cd doc; \
+	  doxygen Doxyfile; \
+	  cd ..; \
+	  cp $(srcdir)/doc/icons/geom/ftv2* doc/html; \
+	fi
+
+doc-clean:
+	if test ${doxygen_found} = yes; then \
+	  rm -rf doc/html; \
+	  rm -f doc/doxygen.log; \
+	  cd doc; \
+	  doxygen Doxyfile; \
+	  cd ..; \
+	  cp $(srcdir)/doc/icons/geom/ftv2* doc/html; \
+	fi
+
+clean-local:
+	-rm -rf doc/html
+	-rm -f doc/doxygen.log
+
+doc/html:
+	$(MAKE) $(AM_MAKEFLAGS) doc-clean
+
+if WANT_DOC
+
+install-data-local: doc/html
+	@$(NORMAL_INSTALL)
+	$(mkinstalldirs) $(DESTDIR)$(htmldir)
+	@dir='doc/html'; shopt -s nullglob; for p in $$dir/*.html $$dir/*.css $$dir/*.png $$dir/*.gif $$dir/*.dot $$dir/*.php $$dir/*.idx $$dir/*.tag ; do \
+	  f="`echo $$p | sed -e 's|^.*/||'`"; \
+	  echo " $(INSTALL_DATA) $$p $(DESTDIR)$(htmldir)/$$f"; \
+	  $(INSTALL_DATA) $$p $(DESTDIR)$(htmldir)/$$f; \
+	done
+
+uninstall-local: doc/html
+	@$(NORMAL_UNINSTALL)
+	@dir='doc/html'; shopt -s nullglob; for p in $$dir/*.html $$dir/*.css $$dir/*.png $$dir/*.gif $$dir/*.dot $$dir/*.php $$dir/*.idx $$dir/*.tag ; do \
+	  f="`echo $$p | sed -e 's|^.*/||'`"; \
+	  echo " rm -f $(DESTDIR)$(htmldir)/$$f"; \
+	  rm -f $(DESTDIR)$(htmldir)/$$f; \
+	done
+
+endif WANT_DOC
+
+.PHONY: doc doc-clean
diff --git a/lemon/Makefile b/lemon/Makefile
new file mode 100644
--- /dev/null
+++ b/lemon/Makefile
@@ -0,0 +1,2 @@
+all:
+	$(MAKE) -C ..
diff --git a/lemon/Makefile.am b/lemon/Makefile.am
new file mode 100644
--- /dev/null
+++ b/lemon/Makefile.am
@@ -0,0 +1,18 @@
+EXTRA_DIST += \
+	lemon/Makefile \
+	lemon/lemon.pc.in
+
+pkgconfig_DATA += lemon/lemon.pc
+
+lib_LTLIBRARIES += lemon/libemon.la
+
+lemon_libemon_la_SOURCES =
+
+lemon_libemon_la_CXXFLAGS = $(GLPK_CFLAGS) $(CPLEX_CFLAGS) $(SOPLEX_CXXFLAGS)
+lemon_libemon_la_LDFLAGS = $(GLPK_LIBS) $(CPLEX_LIBS) $(SOPLEX_LIBS)
+
+lemon_HEADERS +=
+
+bits_HEADERS +=
+
+concept_HEADERS +=
diff --git a/lemon/config.h.in b/lemon/config.h.in
new file mode 100644
--- /dev/null
+++ b/lemon/config.h.in
@@ -0,0 +1,5 @@
+/* Define to 1 if you have CPLEX. */
+#undef HAVE_CPLEX
+
+/* Define to 1 if you have GLPK. */
+#undef HAVE_GLPK
diff --git a/lemon/lemon.pc.in b/lemon/lemon.pc.in
new file mode 100644
--- /dev/null
+++ b/lemon/lemon.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: @PACKAGE_NAME@
+Description: Library of Efficient Models and Optimization in Networks
+Version: @PACKAGE_VERSION@
+Libs: -L${libdir} -lemon @GLPK_LIBS@ @CPLEX_LIBS@
+Cflags: -I${includedir} @GLPK_CFLAGS@ @CPLEX_CFLAGS@
diff --git a/m4/lx_check_cplex.m4 b/m4/lx_check_cplex.m4
new file mode 100644
--- /dev/null
+++ b/m4/lx_check_cplex.m4
@@ -0,0 +1,77 @@
+AC_DEFUN([LX_CHECK_CPLEX],
+[
+  AC_ARG_WITH([cplex],
+AS_HELP_STRING([--with-cplex@<:@=PREFIX@:>@], [search for CPLEX under PREFIX or under the default search paths if PREFIX is not given @<:@default@:>@])
+AS_HELP_STRING([--without-cplex], [disable checking for CPLEX]),
+              [], [with_cplex=yes])
+
+  AC_ARG_WITH([cplex-includedir],
+AS_HELP_STRING([--with-cplex-includedir=DIR], [search for CPLEX headers in DIR]),
+              [], [with_cplex_includedir=no])
+
+  AC_ARG_WITH([cplex-libdir],
+AS_HELP_STRING([--with-cplex-libdir=DIR], [search for CPLEX libraries in DIR]),
+              [], [with_cplex_libdir=no])
+
+  lx_cplex_found=no
+  if test x"$with_cplex" != x"no"; then
+    AC_MSG_CHECKING([for CPLEX])
+
+    if test x"$with_cplex_includedir" != x"no"; then
+      CPLEX_CFLAGS="-I$with_cplex_includedir"
+    elif test x"$with_cplex" != x"yes"; then
+      CPLEX_CFLAGS="-I$with_cplex/include"
+    elif test x"$CPLEX_INCLUDEDIR" != x; then
+      CPLEX_CFLAGS="-I$CPLEX_INCLUDEDIR"
+    fi
+
+    if test x"$with_cplex_libdir" != x"no"; then
+      CPLEX_LDFLAGS="-L$with_cplex_libdir"
+    elif test x"$with_cplex" != x"yes"; then
+      CPLEX_LDFLAGS="-L$with_cplex/lib"
+    elif test x"$CPLEX_LIBDIR" != x; then
+      CPLEX_LDFLAGS="-L$CPLEX_LIBDIR"
+    fi
+    CPLEX_LIBS="-lcplex -lm -lpthread"
+
+    lx_save_cxxflags="$CXXFLAGS"
+    lx_save_ldflags="$LDFLAGS"
+    lx_save_libs="$LIBS"
+    CXXFLAGS="$CPLEX_CFLAGS"
+    LDFLAGS="$CPLEX_LDFLAGS"
+    LIBS="$CPLEX_LIBS"
+
+    lx_cplex_test_prog='
+      extern "C" {
+      #include <ilcplex/cplex.h>
+      }
+
+      int main(int argc, char* argv[])
+      {
+        CPXENVptr env = NULL;
+        return 0;
+      }'
+
+    AC_LANG_PUSH(C++)
+    AC_LINK_IFELSE([$lx_cplex_test_prog], [lx_cplex_found=yes], [lx_cplex_found=no])
+    AC_LANG_POP(C++)
+
+    CXXFLAGS="$lx_save_cxxflags"
+    LDFLAGS="$lx_save_ldflags"
+    LIBS="$lx_save_libs"
+
+    if test x"$lx_cplex_found" = x"yes"; then
+      AC_DEFINE([HAVE_CPLEX], [1], [Define to 1 if you have CPLEX.])
+      AC_MSG_RESULT([yes])
+    else
+      CPLEX_CFLAGS=""
+      CPLEX_LDFLAGS=""
+      CPLEX_LIBS=""
+      AC_MSG_RESULT([no])
+    fi
+  fi
+  CPLEX_LIBS="$CPLEX_LDFLAGS $CPLEX_LIBS"
+  AC_SUBST(CPLEX_CFLAGS)
+  AC_SUBST(CPLEX_LIBS)
+  AM_CONDITIONAL([HAVE_CPLEX], [test x"$lx_cplex_found" = x"yes"])
+])
diff --git a/m4/lx_check_glpk.m4 b/m4/lx_check_glpk.m4
new file mode 100644
--- /dev/null
+++ b/m4/lx_check_glpk.m4
@@ -0,0 +1,75 @@
+AC_DEFUN([LX_CHECK_GLPK],
+[
+  AC_ARG_WITH([glpk],
+AS_HELP_STRING([--with-glpk@<:@=PREFIX@:>@], [search for GLPK under PREFIX or under the default search paths if PREFIX is not given @<:@default@:>@])
+AS_HELP_STRING([--without-glpk], [disable checking for GLPK]),
+              [], [with_glpk=yes])
+
+  AC_ARG_WITH([glpk-includedir],
+AS_HELP_STRING([--with-glpk-includedir=DIR], [search for GLPK headers in DIR]),
+              [], [with_glpk_includedir=no])
+
+  AC_ARG_WITH([glpk-libdir],
+AS_HELP_STRING([--with-glpk-libdir=DIR], [search for GLPK libraries in DIR]),
+              [], [with_glpk_libdir=no])
+
+  lx_glpk_found=no
+  if test x"$with_glpk" != x"no"; then
+    AC_MSG_CHECKING([for GLPK])
+
+    if test x"$with_glpk_includedir" != x"no"; then
+      GLPK_CFLAGS="-I$with_glpk_includedir"
+    elif test x"$with_glpk" != x"yes"; then
+      GLPK_CFLAGS="-I$with_glpk/include"
+    fi
+
+    if test x"$with_glpk_libdir" != x"no"; then
+      GLPK_LDFLAGS="-L$with_glpk_libdir"
+    elif test x"$with_glpk" != x"yes"; then
+      GLPK_LDFLAGS="-L$with_glpk/lib"
+    fi
+    GLPK_LIBS="-lglpk"
+
+    lx_save_cxxflags="$CXXFLAGS"
+    lx_save_ldflags="$LDFLAGS"
+    lx_save_libs="$LIBS"
+    CXXFLAGS="$GLPK_CFLAGS"
+    LDFLAGS="$GLPK_LDFLAGS"
+    LIBS="$GLPK_LIBS"
+
+    lx_glpk_test_prog='
+      extern "C" {
+      #include <glpk.h>
+      }
+
+      int main(int argc, char* argv[])
+      {
+        LPX *lp;
+        lp = lpx_create_prob();
+        lpx_delete_prob(lp);
+        return 0;
+      }'
+
+    AC_LANG_PUSH(C++)
+    AC_LINK_IFELSE([$lx_glpk_test_prog], [lx_glpk_found=yes], [lx_glpk_found=no])
+    AC_LANG_POP(C++)
+
+    CXXFLAGS="$lx_save_cxxflags"
+    LDFLAGS="$lx_save_ldflags"
+    LIBS="$lx_save_libs"
+
+    if test x"$lx_glpk_found" = x"yes"; then
+      AC_DEFINE([HAVE_GLPK], [1], [Define to 1 if you have GLPK.])
+      AC_MSG_RESULT([yes])
+    else
+      GLPK_CFLAGS=""
+      GLPK_LDFLAGS=""
+      GLPK_LIBS=""
+      AC_MSG_RESULT([no])
+    fi
+  fi
+  GLPK_LIBS="$GLPK_LDFLAGS $GLPK_LIBS"
+  AC_SUBST(GLPK_CFLAGS)
+  AC_SUBST(GLPK_LIBS)
+  AM_CONDITIONAL([HAVE_GLPK], [test x"$lx_glpk_found" = x"yes"])
+])
diff --git a/m4/lx_check_soplex.m4 b/m4/lx_check_soplex.m4
new file mode 100644
--- /dev/null
+++ b/m4/lx_check_soplex.m4
@@ -0,0 +1,71 @@
+AC_DEFUN([LX_CHECK_SOPLEX],
+[
+  AC_ARG_WITH([soplex],
+AS_HELP_STRING([--with-soplex@<:@=PREFIX@:>@], [search for SOPLEX under PREFIX or under the default search paths if PREFIX is not given @<:@default@:>@])
+AS_HELP_STRING([--without-soplex], [disable checking for SOPLEX]),
+              [], [with_soplex=yes])
+
+  AC_ARG_WITH([soplex-includedir],
+AS_HELP_STRING([--with-soplex-includedir=DIR], [search for SOPLEX headers in DIR]),
+              [], [with_soplex_includedir=no])
+
+  AC_ARG_WITH([soplex-libdir],
+AS_HELP_STRING([--with-soplex-libdir=DIR], [search for SOPLEX libraries in DIR]),
+              [], [with_soplex_libdir=no])
+
+  lx_soplex_found=no
+  if test x"$with_soplex" != x"no"; then
+    AC_MSG_CHECKING([for SOPLEX])
+
+    if test x"$with_soplex_includedir" != x"no"; then
+      SOPLEX_CXXFLAGS="-I$with_soplex_includedir"
+    elif test x"$with_soplex" != x"yes"; then
+      SOPLEX_CXXFLAGS="-I$with_soplex/include"
+    fi
+
+    if test x"$with_soplex_libdir" != x"no"; then
+      SOPLEX_LDFLAGS="-L$with_soplex_libdir"
+    elif test x"$with_soplex" != x"yes"; then
+      SOPLEX_LDFLAGS="-L$with_soplex/lib"
+    fi
+    SOPLEX_LIBS="-lsoplex -lz"
+
+    lx_save_cxxflags="$CXXFLAGS"
+    lx_save_ldflags="$LDFLAGS"
+    lx_save_libs="$LIBS"
+    CXXFLAGS="$SOPLEX_CXXFLAGS"
+    LDFLAGS="$SOPLEX_LDFLAGS"
+    LIBS="$SOPLEX_LIBS"
+
+    lx_soplex_test_prog='
+      #include <soplex/soplex.h>
+
+      int main(int argc, char* argv[])
+      {
+        soplex::SoPlex soplex;
+        return 0;
+      }'
+
+    AC_LANG_PUSH(C++)
+    AC_LINK_IFELSE([$lx_soplex_test_prog], [lx_soplex_found=yes], [lx_soplex_found=no])
+    AC_LANG_POP(C++)
+
+    CXXFLAGS="$lx_save_cxxflags"
+    LDFLAGS="$lx_save_ldflags"
+    LIBS="$lx_save_libs"
+
+    if test x"$lx_soplex_found" = x"yes"; then
+      AC_DEFINE([HAVE_SOPLEX], [1], [Define to 1 if you have SOPLEX.])
+      AC_MSG_RESULT([yes])
+    else
+      SOPLEX_CXXFLAGS=""
+      SOPLEX_LDFLAGS=""
+      SOPLEX_LIBS=""
+      AC_MSG_RESULT([no])
+    fi
+  fi
+  SOPLEX_LIBS="$SOPLEX_LDFLAGS $SOPLEX_LIBS"
+  AC_SUBST(SOPLEX_CXXFLAGS)
+  AC_SUBST(SOPLEX_LIBS)
+  AM_CONDITIONAL([HAVE_SOPLEX], [test x"$lx_soplex_found" = x"yes"])
+])
diff --git a/test/Makefile b/test/Makefile
new file mode 100644
--- /dev/null
+++ b/test/Makefile
@@ -0,0 +1,2 @@
+all:
+	$(MAKE) -C ..
diff --git a/test/Makefile.am b/test/Makefile.am
new file mode 100644
--- /dev/null
+++ b/test/Makefile.am
@@ -0,0 +1,9 @@
+EXTRA_DIST += \
+	test/Makefile
+
+noinst_HEADERS +=
+
+check_PROGRAMS +=
+
+TESTS += $(check_PROGRAMS)
+XFAIL_TESTS += test/test_tools_fail$(EXEEXT)
diff --git a/tools/Makefile b/tools/Makefile
new file mode 100644
--- /dev/null
+++ b/tools/Makefile
@@ -0,0 +1,2 @@
+all:
+	$(MAKE) -C ..
diff --git a/tools/Makefile.am b/tools/Makefile.am
new file mode 100644
--- /dev/null
+++ b/tools/Makefile.am
@@ -0,0 +1,8 @@
+EXTRA_DIST += \
+	tools/Makefile
+
+if WANT_TOOLS
+
+bin_PROGRAMS +=
+
+endif WANT_TOOLS