diff options
| author | Tobias Burnus <burnus@net-b.de> | 2012-11-21 14:46:34 +0100 |
|---|---|---|
| committer | Tobias Burnus <burnus@gcc.gnu.org> | 2012-11-21 14:46:34 +0100 |
| commit | 5a09d908bcbc74f78d066568c6d535c1e9d6d3fd (patch) | |
| tree | 8af2198385df0e740a9f5be20efa8808ecd8d2d7 /libquadmath/acinclude.m4 | |
| parent | d80556b2fb448a92b706535fbaa811a685339355 (diff) | |
re PR libquadmath/55225 (Fail to build lgammaq.c from trunk with mingw-w64)
2012-11-21 Tobias Burnus <burnus@net-b.de>
PR libquadmath/55225
* math/lgammaq.c (lgammaq): Use local variable if
math.h does not provide signgam.
* acinclude.m4 (LIBQUAD_CHECK_MATH_H_SIGNGAM): New check.
* configure.ac: Use it.
* configure: Regenerate.
* config.h.in: Regenerate.
From-SVN: r193695
Diffstat (limited to 'libquadmath/acinclude.m4')
| -rw-r--r-- | libquadmath/acinclude.m4 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libquadmath/acinclude.m4 b/libquadmath/acinclude.m4 index 38e0808ad93..ab73fb52e05 100644 --- a/libquadmath/acinclude.m4 +++ b/libquadmath/acinclude.m4 @@ -10,3 +10,20 @@ AC_DEFUN([AM_PROG_LIBTOOL]) AC_DEFUN([AC_LIBTOOL_DLOPEN]) AC_DEFUN([AC_PROG_LD]) ]) + +dnl Check whether POSIX's signgam is defined in math.h. +AC_DEFUN([LIBQUAD_CHECK_MATH_H_SIGNGAM], [ + AC_CACHE_CHECK([whether the math.h includes POSIX's signgam], + libgfor_cv_have_math_h_signgam, [ + save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Werror" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +#include <math.h> +void foo(void) { signgam = 1; }]], [])], + libgfor_cv_have_math_h_signgam=yes, + libgfor_cv_have_math_h_signgam=no) + CFLAGS="$save_CFLAGS"]) + if test $libgfor_cv_have_math_h_signgam = yes; then + AC_DEFINE(HAVE_MATH_H_SIGNGAM, 1, + [Define to 1 if the math.h includes POSIX's signgam.]) + fi]) |