Files @ r655:6ac5d9ae1d3d

Location: LEMON/LEMON-official/m4/lx_check_glpk.m4

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r655:6ac5d9ae1d3d
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kpeter (Peter Kovacs)
Support real types + numerical stability fix in NS (#254) - Real types are supported by appropriate inicialization. - A feature of the XTI spanning tree structure is removed to ensure numerical stability (could cause problems using integer types). The node potentials are updated always on the lower subtree, in order to prevent overflow problems. The former method isn't notably faster during to our tests.
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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>

      }



      #if (GLP_MAJOR_VERSION < 4) \

         || (GLP_MAJOR_VERSION == 4 && GLP_MINOR_VERSION < 33)

      #error Supported GLPK versions: 4.33 or above

      #endif



      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.])

      lx_lp_found=yes

      AC_DEFINE([HAVE_LP], [1], [Define to 1 if you have any LP solver.])

      lx_mip_found=yes

      AC_DEFINE([HAVE_MIP], [1], [Define to 1 if you have any MIP solver.])

      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"])

])