mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-13 09:32:47 +00:00
71 lines
2.5 KiB
Plaintext
71 lines
2.5 KiB
Plaintext
# libgmp.m4 serial 7
|
|
# Configure the GMP library or a replacement.
|
|
dnl Copyright 2020-2022 Free Software Foundation, Inc.
|
|
dnl This file is free software; the Free Software Foundation
|
|
dnl gives unlimited permission to copy and/or distribute it,
|
|
dnl with or without modifications, as long as this notice is preserved.
|
|
|
|
dnl gl_LIBGMP
|
|
dnl Search for an installed libgmp.
|
|
dnl If found, set and AC_SUBST HAVE_LIBGMP=yes and the LIBGMP and LTLIBGMP
|
|
dnl variables, and augment the CPPFLAGS variable, and #define HAVE_LIBGMP to 1.
|
|
dnl Otherwise, set and AC_SUBST HAVE_LIBGMP=no and LIBGMP and LTLIBGMP to
|
|
dnl empty.
|
|
|
|
AC_DEFUN([gl_LIBGMP],
|
|
[
|
|
AC_ARG_WITH([libgmp],
|
|
[AS_HELP_STRING([--without-libgmp],
|
|
[do not use the GNU Multiple Precision (GMP) library;
|
|
this is the default on systems lacking libgmp.])])
|
|
HAVE_LIBGMP=no
|
|
LIBGMP=
|
|
LTLIBGMP=
|
|
AS_IF([test "$with_libgmp" != no],
|
|
[AC_CHECK_HEADERS([gmp.h gmp/gmp.h], [break])
|
|
dnl Prefer AC_LIB_HAVE_LINKFLAGS if the havelib module is also in use.
|
|
AS_IF([test "$ac_cv_header_gmp_h" = yes ||
|
|
test "$ac_cv_header_gmp_gmp_h" = yes],
|
|
[m4_ifdef([gl_HAVE_MODULE_HAVELIB],
|
|
[AC_LIB_HAVE_LINKFLAGS([gmp], [],
|
|
[#if HAVE_GMP_H
|
|
# include <gmp.h>
|
|
#else
|
|
# include <gmp/gmp.h>
|
|
#endif],
|
|
[static const mp_limb_t x[2] = { 0x73, 0x55 };
|
|
mpz_t tmp;
|
|
mpz_roinit_n (tmp, x, 2);
|
|
],
|
|
[no])],
|
|
[gl_saved_LIBS=$LIBS
|
|
AC_SEARCH_LIBS([__gmpz_roinit_n], [gmp])
|
|
LIBS=$gl_saved_LIBS
|
|
case $ac_cv_search___gmpz_roinit_n in
|
|
'none needed')
|
|
HAVE_LIBGMP=yes;;
|
|
-*)
|
|
HAVE_LIBGMP=yes
|
|
LIBGMP=$ac_cv_search___gmpz_roinit_n
|
|
LTLIBGMP=$LIBGMP;;
|
|
esac
|
|
AC_SUBST([HAVE_LIBGMP])
|
|
AC_SUBST([LIBGMP])
|
|
AC_SUBST([LTLIBGMP])])])
|
|
if test "$with_libgmp,$HAVE_LIBGMP" = yes,no; then
|
|
AC_MSG_ERROR(
|
|
[GMP not found, although --with-libgmp was specified.m4_ifdef(
|
|
[AC_LIB_HAVE_LINKFLAGS],
|
|
[ Try specifying --with-libgmp-prefix=DIR.])])
|
|
fi])
|
|
if test $HAVE_LIBGMP = yes && test "$ac_cv_header_gmp_h" = yes; then
|
|
GL_GENERATE_GMP_H=false
|
|
else
|
|
GL_GENERATE_GMP_H=true
|
|
fi
|
|
gl_CONDITIONAL([GL_GENERATE_MINI_GMP_H],
|
|
[test $HAVE_LIBGMP != yes])
|
|
gl_CONDITIONAL([GL_GENERATE_GMP_GMP_H],
|
|
[test $HAVE_LIBGMP = yes && test "$ac_cv_header_gmp_h" != yes])
|
|
])
|