| 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]) |
