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41 lines
1.5 KiB
41 lines
1.5 KiB
# Is the gmp header file new enough? (should be implemented with an argument)
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AC_DEFUN(CL_GMP_H_VERSION,
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[AC_CACHE_CHECK([for recent enough gmp.h], cl_cv_new_gmp_h, [
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AC_TRY_CPP([#include <gmp.h>
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#if !defined(__GNU_MP_VERSION) || (__GNU_MP_VERSION < 3)
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#error "ancient gmp.h"
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#endif],
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cl_cv_new_gmp_h="yes", cl_cv_new_gmp_h="no")
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])])dnl
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# Does libgmp provide some functionality introduced in version 3.0?
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AC_DEFUN(CL_GMP_CHECK,
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[AC_CACHE_CHECK([for working libgmp], cl_cv_new_libgmp, [
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SAVELIBS=$LIBS
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LIBS="$LIBS -lgmp"
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AC_TRY_LINK([#include <gmp.h>],[mpn_divexact_by3(0,0,0)],
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cl_cv_new_libgmp="yes", cl_cv_new_libgmp="no"; LIBS=$SAVELIBS)
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])])
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# What is sizeof(mp_limb_t)? (It has to match sizeof(uintD) later.)
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AC_DEFUN(CL_GMP_SET_UINTD,
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[AC_CACHE_CHECK([how large gmp demands uintD to be], cl_cv_gmp_set_uintd, [
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AC_TRY_RUN([#include <stdio.h>
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#include <gmp.h>
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int main() {
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FILE *f=fopen("conftestval", "w");
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if (!f) return(1);
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if (sizeof(mp_limb_t) > sizeof(long))
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fprintf(f, "long long");
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else if (sizeof(mp_limb_t) == sizeof(long))
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fprintf(f, "long");
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else if (sizeof(mp_limb_t) == sizeof(int))
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fprintf(f, "int");
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else return(1);
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return(0);
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}], cl_cv_gmp_set_uintd=`cat conftestval`; \
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cl_gmp_demands="GMP_DEMANDS_UINTD_`echo ${cl_cv_gmp_set_uintd} | sed -e 'y/ gilnot/_GILNOT/'`";
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AC_DEFINE_UNQUOTED($cl_gmp_demands),
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AC_MSG_ERROR([CLN can't handle the result]),dnl
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AC_MSG_ERROR([cross-compiling - cannot determine]))
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])])
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