diff -r 115e42a5b0f7 -r 83388a4aa3af configure.ac
--- a/configure.ac	Wed Apr 13 06:49:42 2005 +0000
+++ b/configure.ac	Thu Apr 14 12:02:14 2005 +0000
@@ -4,7 +4,7 @@
 AM_INIT_AUTOMAKE
 AC_CONFIG_SRCDIR([src/lemon/invalid.h])
 AM_CONFIG_HEADER([config.h])
-AC_PREREQ(2.57)
+AC_PREREQ([2.53])
 
 dnl Checks for programs.
 AC_PROG_CXX
@@ -12,12 +12,12 @@
 AC_DISABLE_SHARED
 AC_PROG_LIBTOOL
 
-dnl I know this is not perfect. A better solution will come soon.
 if test $CXX != icc -a $CXX != icpc; then
-  CXXFLAGS="$CXXFLAGS -Wall"
+  CXXFLAGS="$CXXFLAGS -Wall -W"
 fi
 
 dnl Checks for libraries.
+LX_CHECK_GLPK
 
 dnl Checks for header files.
 AC_CHECK_HEADERS(limits.h sys/time.h sys/times.h unistd.h)
@@ -45,4 +45,5 @@
 src/demo/Makefile
 src/test/Makefile
 ])
+
 AC_OUTPUT