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| author | Paul Eggert <eggert@cs.ucla.edu> | 2020-07-06 18:54:11 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2020-07-06 19:03:03 -0700 |
| commit | 3b0ef0b854a43aea12364fafd4bb053d59c116f2 (patch) | |
| tree | c2d66ee7ed712b946a7db881aa15a8eb1f1eb4db /m4/libgmp.m4 | |
| parent | 4cfff6810c595e60cf4411dc9bac83c0328e8812 (diff) | |
| download | gnulib-3b0ef0b854a43aea12364fafd4bb053d59c116f2.tar.gz | |
libgmp: new module
The idea is to let programs simply include <gmp.h>, and
so long as they live within the mini-gmp subset they need
not worry about whether the GMP libraries are installed.
* MODULES.html.sh: Mention it.
* config/srclist.txt: Mention files copied from GMP source.
* config/srclistvars.sh (GMP): New var.
* lib/mini-gmp-gnulib.c, m4/libgmp.m4, modules/libgmp:
* modules/libgmp-tests, tests/test-libgmp.c: New files.
* lib/mini-gmp.c, lib/mini-gmp.h: New files, copied from GMP.
Diffstat (limited to 'm4/libgmp.m4')
| -rw-r--r-- | m4/libgmp.m4 | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/m4/libgmp.m4 b/m4/libgmp.m4 new file mode 100644 index 0000000000..b569bb7346 --- /dev/null +++ b/m4/libgmp.m4 @@ -0,0 +1,44 @@ +# Configure the GMP library or a replacement. + +dnl Copyright 2020 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. + +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.])]) + + AC_CHECK_HEADERS_ONCE([gmp.h]) + GMP_H=gmp.h + LIB_GMP= + + case $with_libgmp in + no) ;; + yes) GMP_H= LIB_GMP=-lgmp;; + *) if test "$ac_cv_header_gmp_h" = yes; then + gl_saved_LIBS=$LIBS + AC_SEARCH_LIBS([__gmpz_roinit_n], [gmp]) + LIBS=$gl_saved_LIBS + case $ac_cv_search___gmpz_roinit_n in + 'none needed') + GMP_H=;; + -*) + GMP_H= LIB_GMP=$ac_cv_search___gmpz_roinit_n;; + esac + fi;; + esac + + if test -z "$GMP_H"; then + AC_DEFINE([HAVE_GMP], 1, + [Define to 1 if you have the GMP library instead of just the + mini-gmp replacement.]) + fi + + AC_SUBST([LIB_GMP]) + AC_SUBST([GMP_H]) + AM_CONDITIONAL([GL_GENERATE_GMP_H], [test -n "$GMP_H"]) +]) |