dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_LDEXPL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_DEFUN([gl_FUNC_LDEXPL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
- dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.
- AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [#include <math.h>])
+ dnl Mac OS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.
+ AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [[#include <math.h>]])
+
fi
if test $HAVE_DECL_LDEXPL = 0 || test $gl_func_ldexpl = no; then
dnl Find libraries needed to link lib/ldexpl.c.
fi
if test $HAVE_DECL_LDEXPL = 0 || test $gl_func_ldexpl = no; then
dnl Find libraries needed to link lib/ldexpl.c.
- LDEXPL_LIBM="$ISNANL_LIBM"
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_LDEXP])
+ LDEXPL_LIBM="$LDEXP_LIBM"
+ else
+ LDEXPL_LIBM="$ISNANL_LIBM"
+ fi