-# logf.m4 serial 4
-dnl Copyright (C) 2011-2012 Free Software Foundation, Inc.
+# logf.m4 serial 6
+dnl Copyright (C) 2011-2014 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.
m4_ifdef([gl_FUNC_LOGF_IEEE], [
if test $gl_logf_required = ieee && test $REPLACE_LOGF = 0; then
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether logf works according to ISO C 99 with IEC 60559],
[gl_cv_func_logf_ieee],
[
static float dummy (float x) { return 0; }
int main (int argc, char *argv[])
{
- float (*my_log) (float) = argc ? logf : dummy;
+ float (*my_logf) (float) = argc ? logf : dummy;
/* Test logf(negative).
This test fails on NetBSD 5.1. */
float y = my_logf (-1.0f);
]])],
[gl_cv_func_logf_ieee=yes],
[gl_cv_func_logf_ieee=no],
- [gl_cv_func_logf_ieee="guessing no"])
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_logf_ieee="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_logf_ieee="guessing no" ;;
+ esac
+ ])
LIBS="$save_LIBS"
])
case "$gl_cv_func_logf_ieee" in