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| author | Bruno Haible <bruno@clisp.org> | 2011-06-19 12:48:10 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2011-06-19 12:48:10 +0200 |
| commit | e73e42a61d1dbf1a80ba2fd95fef2aa98de6f48b (patch) | |
| tree | faa4b3c988c072edd8de2fd0bbd54b4a18d181c3 /m4/roundf.m4 | |
| parent | b68d5ea20723040e3763cc9c3a8e127e731f22ac (diff) | |
| download | gnulib-e73e42a61d1dbf1a80ba2fd95fef2aa98de6f48b.tar.gz | |
floor*-ieee, ceil*-ieee, trunc*-ieee, round*-ieee: More robust checks.
* m4/floorf.m4 (gl_FUNC_FLOORF): In the test whether the function is
IEEE compliant, avoid compiler optimizations.
* m4/floor.m4 (gl_FUNC_FLOOR): Likewise.
* m4/ceilf.m4 (gl_FUNC_CEILF): Likewise.
* m4/ceil.m4 (gl_FUNC_CEIL): Likewise.
* m4/ceill.m4 (gl_FUNC_CEILL): Likewise.
* m4/truncf.m4 (gl_FUNC_TRUNCF): Likewise.
* m4/trunc.m4 (gl_FUNC_TRUNC): Likewise.
* m4/truncl.m4 (gl_FUNC_TRUNCL): Likewise.
* m4/roundf.m4 (gl_FUNC_ROUNDF): Likewise.
* m4/round.m4 (gl_FUNC_ROUND): Likewise.
* m4/roundl.m4 (gl_FUNC_ROUNDL): Likewise.
Diffstat (limited to 'm4/roundf.m4')
| -rw-r--r-- | m4/roundf.m4 | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/m4/roundf.m4 b/m4/roundf.m4 index 0ff964608d..83dffd1a8f 100644 --- a/m4/roundf.m4 +++ b/m4/roundf.m4 @@ -1,4 +1,4 @@ -# roundf.m4 serial 11 +# roundf.m4 serial 12 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -66,10 +66,12 @@ int main() #include <math.h> ]gl_FLOAT_MINUS_ZERO_CODE[ ]gl_FLOAT_SIGNBIT_CODE[ -int main() +static float dummy (float f) { return 0; } +int main (int argc, char *argv[]) { + float (*my_roundf) (float) = argc ? roundf : dummy; /* Test whether roundf (-0.0f) is -0.0f. */ - if (signbitf (minus_zerof) && !signbitf (roundf (minus_zerof))) + if (signbitf (minus_zerof) && !signbitf (my_roundf (minus_zerof))) return 1; return 0; } |