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| author | Bruno Haible <bruno@clisp.org> | 2010-12-21 14:32:25 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2010-12-21 17:30:27 +0100 |
| commit | f10ca7e0a421ace0dd6124bd8f0ba8e7570ebec3 (patch) | |
| tree | 8c8d81065ed3e32e0bb50389674baedd70799e12 /m4/ceilf.m4 | |
| parent | 1d7de2b4c343cfb0eb4d1171acf0877630e32151 (diff) | |
| download | gnulib-f10ca7e0a421ace0dd6124bd8f0ba8e7570ebec3.tar.gz | |
New module 'ceilf-ieee'.
* modules/ceilf-ieee: New file.
* m4/ceilf.m4 (gl_FUNC_FLOORF): If gl_FUNC_CEILF_IEEE is also used,
test whether ceilf works according to ISO C 99 with IEC 60559.
* m4/ceilf-ieee.m4: New file.
* modules/ceilf-ieee-tests: New file.
* tests/test-ceilf-ieee.c: New file, based on tests/test-ceilf1.c.
* tests/test-ceilf1.c (main): Remove signbit tests.
* modules/ceilf-tests (Depends-on): Remove 'signbit'.
* doc/posix-functions/ceilf.texi: Mention the new module.
Diffstat (limited to 'm4/ceilf.m4')
| -rw-r--r-- | m4/ceilf.m4 | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/m4/ceilf.m4 b/m4/ceilf.m4 index a33b9aa7e6..7b9bbcc243 100644 --- a/m4/ceilf.m4 +++ b/m4/ceilf.m4 @@ -1,4 +1,4 @@ -# ceilf.m4 serial 7 +# ceilf.m4 serial 8 dnl Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -6,6 +6,7 @@ dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_CEILF], [ + m4_divert_text([DEFAULTS], [gl_ceilf_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) dnl Persuade glibc <math.h> to declare ceilf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) @@ -19,6 +20,40 @@ AC_DEFUN([gl_FUNC_CEILF], dnl libm.so, but not in the libm.so that the compiler uses. REPLACE_CEILF=1 fi + m4_ifdef([gl_FUNC_CEILF_IEEE], [ + if test $gl_ceilf_required = ieee && test $REPLACE_CEILF = 0; then + AC_CACHE_CHECK([whether ceilf works according to ISO C 99 with IEC 60559], + [gl_cv_func_ceilf_ieee], + [ + save_LIBS="$LIBS" + LIBS="$LIBS $CEILF_LIBM" + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#ifndef __NO_MATH_INLINES +# define __NO_MATH_INLINES 1 /* for glibc */ +#endif +#include <math.h> +]gl_FLOAT_MINUS_ZERO_CODE[ +]gl_FLOAT_SIGNBIT_CODE[ +int main() +{ + /* Test whether ceilf (-0.0f) is -0.0f. */ + if (signbitf (minus_zerof) && !signbitf (ceilf (minus_zerof))) + return 1; + return 0; +} + ]])], + [gl_cv_func_ceilf_ieee=yes], + [gl_cv_func_ceilf_ieee=no], + [gl_cv_func_ceilf_ieee="guessing no"]) + LIBS="$save_LIBS" + ]) + case "$gl_cv_func_ceilf_ieee" in + *yes) ;; + *) REPLACE_CEILF=1 ;; + esac + fi + ]) else HAVE_DECL_CEILF=0 fi |