1dnl ----------------------------------------------------------------------
2dnl This whole bit snagged from libgfortran.
3
4sinclude(../libtool.m4)
5dnl The lines below arrange for aclocal not to bring an installed
6dnl libtool.m4 into aclocal.m4, while still arranging for automake to
7dnl add a definition of LIBTOOL to Makefile.in.
8ifelse(,,,[AC_SUBST(LIBTOOL)
9AC_DEFUN([AM_PROG_LIBTOOL])
10AC_DEFUN([AC_LIBTOOL_DLOPEN])
11AC_DEFUN([AC_PROG_LD])
12])
13
14dnl Check whether POSIX's signgam is defined in math.h.
15AC_DEFUN([LIBQUAD_CHECK_MATH_H_SIGNGAM], [
16  AC_CACHE_CHECK([whether the math.h includes POSIX's signgam],
17                 libgfor_cv_have_math_h_signgam, [
18  save_CFLAGS="$CFLAGS"
19  CFLAGS="$CFLAGS -Werror"
20  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
21#include <math.h>
22void foo(void) { signgam = 1; }]], [])],
23                    libgfor_cv_have_math_h_signgam=yes,
24                    libgfor_cv_have_math_h_signgam=no)
25  CFLAGS="$save_CFLAGS"])
26  if test $libgfor_cv_have_math_h_signgam = yes; then
27    AC_DEFINE(HAVE_MATH_H_SIGNGAM, 1,
28      [Define to 1 if the math.h includes POSIX's signgam.])
29  fi])
30