-# roundf.m4 serial 6
-dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.
+# roundf.m4 serial 8
+dnl Copyright (C) 2007-2010 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.
[
save_LIBS="$LIBS"
LIBS="$LIBS $ROUNDF_LIBM"
- AC_TRY_RUN([
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <float.h>
#include <math.h>
int main()
* (float) (1U << ((FLT_MANT_DIG + 2) / 3));
volatile float x = 0.5f - 0.5f / TWO_MANT_DIG;
exit (x < 0.5f && roundf (x) != 0.0f);
-}], [gl_cv_func_roundf_works=yes], [gl_cv_func_roundf_works=no],
+}]])], [gl_cv_func_roundf_works=yes], [gl_cv_func_roundf_works=no],
[case "$host_os" in
mingw*) gl_cv_func_roundf_works="guessing no";;
*) gl_cv_func_roundf_works="guessing yes";;
if test "$FLOORF_LIBM" != '?' && test "$CEILF_LIBM" != '?'; then
AC_DEFINE([HAVE_FLOORF_AND_CEILF], [1],
[Define if the both the floorf() and ceilf() functions exist.])
- ROUNDF_LIBM="$FLOORF_LIBM $CEILF_LIBM"
+ ROUNDF_LIBM=
+ dnl Append $FLOORF_LIBM to ROUNDF_LIBM, avoiding gratuitous duplicates.
+ case " $ROUNDF_LIBM " in
+ *" $FLOORF_LIBM "*) ;;
+ *) ROUNDF_LIBM="$ROUNDF_LIBM $FLOORF_LIBM" ;;
+ esac
+ dnl Append $CEILF_LIBM to ROUNDF_LIBM, avoiding gratuitous duplicates.
+ case " $ROUNDF_LIBM " in
+ *" $CEILF_LIBM "*) ;;
+ *) ROUNDF_LIBM="$ROUNDF_LIBM $CEILF_LIBM" ;;
+ esac
else
ROUNDF_LIBM=
fi