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| author | Bruno Haible <bruno@clisp.org> | 2012-02-29 20:00:38 +0100 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2012-02-29 20:51:42 +0100 |
| commit | 9fb732a430dbc21f0502b77e76ec68d13f8b8f39 (patch) | |
| tree | 8bb6318963b4fd68d396c4c9d0b53574f664ecf2 /doc/posix-functions/hypot.texi | |
| parent | 55fdaed70798368a6ee79e84c687fd23487ed632 (diff) | |
| download | gnulib-9fb732a430dbc21f0502b77e76ec68d13f8b8f39.tar.gz | |
hypot-ieee: Work around test failure on OSF/1 and native Windows.
* lib/math.in.h (hypot): New declaration.
* lib/hypot.c: New file.
* m4/hypot-ieee.m4: New file.
* m4/hypot.m4 (gl_FUNC_HYPOT): If gl_FUNC_HYPOT_IEEE is present, test
whether hypot works with mixed NaN and Infinity arguments. Replace it
if not.
* m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize GNULIB_HYPOT,
REPLACE_HYPOT.
* modules/math (Makefile.am): Substitute GNULIB_HYPOT, REPLACE_HYPOT.
* modules/hypot (Files): Add lib/hypot.c.
(Depends-on): Add dependencies.
(configure.ac): Arrange to compile replacement if REPLACE_HYPOT is 1.
* modules/hypot-ieee (Files): Add m4/hypot-ieee.m4.
(configure.ac): Invoke gl_FUNC_HYPOT_IEEE.
* tests/test-math-c++.cc: Check the declaration of hypot.
* doc/posix-functions/hypot.texi: Mention the hypot-ieee module.
Diffstat (limited to 'doc/posix-functions/hypot.texi')
| -rw-r--r-- | doc/posix-functions/hypot.texi | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/doc/posix-functions/hypot.texi b/doc/posix-functions/hypot.texi index 84d4b9d54a..eda9a6be02 100644 --- a/doc/posix-functions/hypot.texi +++ b/doc/posix-functions/hypot.texi @@ -4,12 +4,20 @@ POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/hypot.html} -Gnulib module: hypot +Gnulib module: hypot or hypot-ieee -Portability problems fixed by Gnulib: +Portability problems fixed by either Gnulib module @code{hypot} or @code{hypot-ieee}: @itemize @end itemize +Portability problems fixed by Gnulib module @code{hypot-ieee}: +@itemize +@item +When the arguments are mixed NaN and Infinity, this function returns a wrong +value on some platforms: +OSF/1 5.1, mingw, MSVC 9. +@end itemize + Portability problems not fixed by Gnulib: @itemize @end itemize |