diff options
Diffstat (limited to 'gcc-4.9/libquadmath/acinclude.m4')
| -rw-r--r-- | gcc-4.9/libquadmath/acinclude.m4 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gcc-4.9/libquadmath/acinclude.m4 b/gcc-4.9/libquadmath/acinclude.m4 new file mode 100644 index 000000000..ab73fb52e --- /dev/null +++ b/gcc-4.9/libquadmath/acinclude.m4 @@ -0,0 +1,29 @@ +dnl ---------------------------------------------------------------------- +dnl This whole bit snagged from libgfortran. + +sinclude(../libtool.m4) +dnl The lines below arrange for aclocal not to bring an installed +dnl libtool.m4 into aclocal.m4, while still arranging for automake to +dnl add a definition of LIBTOOL to Makefile.in. +ifelse(,,,[AC_SUBST(LIBTOOL) +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]) |