--- /dev/null
+# printf-frexpl.m4 serial 1
+dnl Copyright (C) 2007 Free Software Foundation, Inc.
+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 Check how to define printf_frexpl() without linking with libm.
+
+AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
+[
+ AC_REQUIRE([gt_TYPE_LONGDOUBLE])
+ if test $gt_cv_c_long_double = yes; then
+ AC_CACHE_CHECK([whether frexpl can be used without linking with libm],
+ [gl_cv_func_frexpl_no_libm],
+ [
+ AC_TRY_LINK([#include <math.h>
+ long double x;
+ int y;],
+ [return frexpl (x, &y) < 1;],
+ [gl_cv_func_frexpl_no_libm=yes],
+ [gl_cv_func_frexpl_no_libm=no])
+ ])
+ if test $gl_cv_func_frexpl_no_libm = yes; then
+ AC_DEFINE([HAVE_FREXPL_IN_LIBC], 1,
+ [Define if the frexpl function is available in libc.])
+ fi
+
+ AC_CACHE_CHECK([whether ldexpl can be used without linking with libm],
+ [gl_cv_func_ldexpl_no_libm],
+ [
+ AC_TRY_LINK([#include <math.h>
+ long double x;
+ int y;],
+ [return ldexpl (x, y) < 1;],
+ [gl_cv_func_ldexpl_no_libm=yes],
+ [gl_cv_func_ldexpl_no_libm=no])
+ ])
+ if test $gl_cv_func_ldexpl_no_libm = yes; then
+ AC_DEFINE([HAVE_LDEXPL_IN_LIBC], 1,
+ [Define if the ldexpl function is available in libc.])
+ fi
+ fi
+])