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build: fix issues when building with GMP

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* m4/gmp.m4 (cu_GMP): Add an extra check that gmp.h is available
which is required on one Mac OS X 10.5.8 system at least,
where the lib was available but the header wasn't.
Also enable our GMP code on systems where GMP is not in a separate lib.
This commit is contained in:
Pádraig Brady 2013-03-22 13:58:55 +00:00
parent a24e4a01ca
commit dc4fbb99a9
1 changed files with 21 additions and 13 deletions
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34
m4/gmp.m4
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@ -23,18 +23,26 @@ AC_DEFUN([cu_GMP],
[cu_use_gmp=auto])
if test $cu_use_gmp != no; then
cu_saved_libs=$LIBS
AC_SEARCH_LIBS([__gmpz_init], [gmp],
[test "$ac_cv_search___gmpz_init" = "none required" ||
{
LIB_GMP=$ac_cv_search___gmpz_init
AC_DEFINE([HAVE_GMP], [1],
[Define if you have GNU libgmp (or replacement)])
# This only available in GMP >= 5
AC_CHECK_DECLS([mpz_inits], [], [], [[#include <gmp.h>]])
}],
[AC_MSG_WARN([libgmp development library was not found or not usable.])
AC_MSG_WARN([AC_PACKAGE_NAME will be built without GMP support.])])
LIBS=$cu_saved_libs
dnl It was noticed on one MacOS X 10.5.8 system at least
dnl that the libs were available but the header wasn't
HAVE_GMP=0
AC_CHECK_HEADERS_ONCE([gmp.h])
if test $ac_cv_header_gmp_h = yes; then
cu_saved_libs=$LIBS
AC_SEARCH_LIBS([__gmpz_init], [gmp],
[test "$ac_cv_search___gmpz_init" = "none required" ||
LIB_GMP=$ac_cv_search___gmpz_init
AC_DEFINE([HAVE_GMP], [1],
[Define if you have GNU libgmp (or replacement)])
HAVE_GMP=1
# This only available in GMP >= 5
AC_CHECK_DECLS([mpz_inits], [], [], [[#include <gmp.h>]])
])
LIBS=$cu_saved_libs
fi
if test $HAVE_GMP != 1; then
AC_MSG_WARN([libgmp development library was not found or not usable.])
AC_MSG_WARN([AC_PACKAGE_NAME will be built without GMP support.])
fi
fi
])