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30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
dnl ----------------------------------------------------------------------
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dnl This whole bit snagged from libgfortran.
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sinclude(../libtool.m4)
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dnl The lines below arrange for aclocal not to bring an installed
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dnl libtool.m4 into aclocal.m4, while still arranging for automake to
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dnl add a definition of LIBTOOL to Makefile.in.
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ifelse(,,,[AC_SUBST(LIBTOOL)
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AC_DEFUN([AM_PROG_LIBTOOL])
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AC_DEFUN([AC_LIBTOOL_DLOPEN])
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AC_DEFUN([AC_PROG_LD])
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])
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dnl Check whether POSIX's signgam is defined in math.h.
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AC_DEFUN([LIBQUAD_CHECK_MATH_H_SIGNGAM], [
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AC_CACHE_CHECK([whether the math.h includes POSIX's signgam],
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libgfor_cv_have_math_h_signgam, [
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <math.h>
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void foo(void) { signgam = 1; }]], [])],
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libgfor_cv_have_math_h_signgam=yes,
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libgfor_cv_have_math_h_signgam=no)
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CFLAGS="$save_CFLAGS"])
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if test $libgfor_cv_have_math_h_signgam = yes; then
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AC_DEFINE(HAVE_MATH_H_SIGNGAM, 1,
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[Define to 1 if the math.h includes POSIX's signgam.])
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fi])
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