m4/lx_check_clp.m4
author Peter Kovacs <kpeter@inf.elte.hu>
Fri, 17 Apr 2009 18:04:36 +0200
changeset 656 e6927fe719e6
permissions -rw-r--r--
Support >= and <= constraints in NetworkSimplex (#219, #234)

By default the same inequality constraints are supported as by
Circulation (the GEQ form), but the LEQ form can also be selected
using the problemType() function.

The documentation of the min. cost flow module is reworked and
extended with important notes and explanations about the different
variants of the problem and about the dual solution and optimality
conditions.
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AC_DEFUN([LX_CHECK_CLP],
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[
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  AC_ARG_WITH([clp],
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AS_HELP_STRING([--with-clp@<:@=PREFIX@:>@], [search for CLP under PREFIX or under the default search paths if PREFIX is not given @<:@default@:>@])
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AS_HELP_STRING([--without-clp], [disable checking for CLP]),
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              [], [with_clp=yes])
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  AC_ARG_WITH([clp-includedir],
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AS_HELP_STRING([--with-clp-includedir=DIR], [search for CLP headers in DIR]),
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              [], [with_clp_includedir=no])
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  AC_ARG_WITH([clp-libdir],
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AS_HELP_STRING([--with-clp-libdir=DIR], [search for CLP libraries in DIR]),
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              [], [with_clp_libdir=no])
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  lx_clp_found=no
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  if test x"$with_clp" != x"no"; then
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    AC_MSG_CHECKING([for CLP])
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    if test x"$with_clp_includedir" != x"no"; then
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      CLP_CXXFLAGS="-I$with_clp_includedir"
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    elif test x"$with_clp" != x"yes"; then
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      CLP_CXXFLAGS="-I$with_clp/include"
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    fi
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    if test x"$with_clp_libdir" != x"no"; then
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      CLP_LDFLAGS="-L$with_clp_libdir"
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    elif test x"$with_clp" != x"yes"; then
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      CLP_LDFLAGS="-L$with_clp/lib"
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    fi
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    CLP_LIBS="-lClp -lCoinUtils -lm"
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    lx_save_cxxflags="$CXXFLAGS"
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    lx_save_ldflags="$LDFLAGS"
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    lx_save_libs="$LIBS"
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    CXXFLAGS="$CLP_CXXFLAGS"
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    LDFLAGS="$CLP_LDFLAGS"
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    LIBS="$CLP_LIBS"
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    lx_clp_test_prog='
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      #include <coin/ClpModel.hpp>
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      int main(int argc, char** argv)
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      {
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        ClpModel clp;
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        return 0;
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      }'
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    AC_LANG_PUSH(C++)
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    AC_LINK_IFELSE([$lx_clp_test_prog], [lx_clp_found=yes], [lx_clp_found=no])
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    AC_LANG_POP(C++)
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    CXXFLAGS="$lx_save_cxxflags"
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    LDFLAGS="$lx_save_ldflags"
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    LIBS="$lx_save_libs"
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    if test x"$lx_clp_found" = x"yes"; then
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      AC_DEFINE([HAVE_CLP], [1], [Define to 1 if you have CLP.])
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      lx_lp_found=yes
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      AC_DEFINE([HAVE_LP], [1], [Define to 1 if you have any LP solver.])
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      AC_MSG_RESULT([yes])
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    else
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      CLP_CXXFLAGS=""
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      CLP_LDFLAGS=""
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      CLP_LIBS=""
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      AC_MSG_RESULT([no])
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    fi
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  fi
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  CLP_LIBS="$CLP_LDFLAGS $CLP_LIBS"
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  AC_SUBST(CLP_CXXFLAGS)
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  AC_SUBST(CLP_LIBS)
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  AM_CONDITIONAL([HAVE_CLP], [test x"$lx_clp_found" = x"yes"])
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])