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ax_detect_gmp.m4 revision 1.1 
      1 AC_DEFUN([AX_DETECT_GMP], [
      2 AC_DEFINE([USE_GMP_FOR_MP], [], [use gmp to implement isl_int])
      3 AX_SUBMODULE(gmp,system|build,system)
      4 case "$with_gmp" in
      5 system)
      6 	if test "x$with_gmp_prefix" != "x"; then
      7 		MP_CPPFLAGS="-I$with_gmp_prefix/include"
      8 		MP_LDFLAGS="-L$with_gmp_prefix/lib"
      9 	fi
     10 	MP_LIBS=-lgmp
     11 	SAVE_CPPFLAGS="$CPPFLAGS"
     12 	SAVE_LDFLAGS="$LDFLAGS"
     13 	SAVE_LIBS="$LIBS"
     14 	CPPFLAGS="$MP_CPPFLAGS $CPPFLAGS"
     15 	LDFLAGS="$MP_LDFLAGS $LDFLAGS"
     16 	LIBS="$MP_LIBS $LIBS"
     17 	AC_CHECK_HEADER([gmp.h], [], [AC_MSG_ERROR([gmp.h header not found])])
     18 	AC_CHECK_LIB([gmp], [main], [], [AC_MSG_ERROR([gmp library not found])])
     19 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <gmp.h>]], [[
     20 		mpz_t n, d;
     21 		if (mpz_divisible_p(n, d))
     22 			mpz_divexact_ui(n, n, 4);
     23 	]])], [], [AC_MSG_ERROR([gmp library too old])])
     24 	CPPFLAGS="$SAVE_CPPFLAGS"
     25 	LDFLAGS="$SAVE_LDFLAGS"
     26 	LIBS="$SAVE_LIBS"
     27 	;;
     28 build)
     29 	MP_CPPFLAGS="-I$gmp_srcdir -I$with_gmp_builddir"
     30 	MP_LIBS="$with_gmp_builddir/libgmp.la"
     31 	;;
     32 esac
     33 SAVE_CPPFLAGS="$CPPFLAGS"
     34 SAVE_LDFLAGS="$LDFLAGS"
     35 SAVE_LIBS="$LIBS"
     36 CPPFLAGS="$MP_CPPFLAGS $CPPFLAGS"
     37 LDFLAGS="$MP_LDFLAGS $LDFLAGS"
     38 LIBS="$MP_LIBS $LIBS"
     39 need_get_memory_functions=false
     40 AC_CHECK_DECLS(mp_get_memory_functions,[],[
     41 	need_get_memory_functions=true
     42 ],[#include <gmp.h>])
     43 CPPFLAGS="$SAVE_CPPFLAGS"
     44 LDFLAGS="$SAVE_LDFLAGS"
     45 LIBS="$SAVE_LIBS"
     46 AM_CONDITIONAL(NEED_GET_MEMORY_FUNCTIONS, test x$need_get_memory_functions = xtrue)
     47 ])
     48