mirror of
https://git.savannah.gnu.org/git/gnulib.git
synced 2025-08-17 12:41:05 +03:00
833333f7ed
* m4/math_h.m4 (gl_MATH_H): Check for bug. (gl_MATH_H_DEFAULTS): Set up default. * modules/math (Makefile.am): Replace new indicators. * lib/math.in.h (NAN, HUGE_VAL): Provide replacements. * tests/test-math.c (main): Test this. * m4/strtod.m4 (gl_FUNC_STRTOD): Don't rely on HUGE_VAL. * doc/posix-headers/math.texi (math.h): Mention bug. Reported by Nelson H. F. Beebe and Jim Meyering. Signed-off-by: Eric Blake <ebb9@byu.net>
31 lines
707 B
Plaintext
31 lines
707 B
Plaintext
@node math.h
|
|
@section @file{math.h}
|
|
|
|
POSIX specification: @url{http://www.opengroup.org/susv3xbd/math.h.html}
|
|
|
|
Gnulib module: math
|
|
|
|
Portability problems fixed by Gnulib:
|
|
@itemize
|
|
@item
|
|
The macro @code{NAN} is not defined on some platforms:
|
|
OpenBSD 4.0, AIX 5.1, IRIX 6.5, OSF/1 5.1.
|
|
|
|
@item
|
|
The macro @code{NAN} is not exposed outside of C99 compilation on some
|
|
platforms:
|
|
glibc.
|
|
|
|
@item
|
|
The macros @code{NAN} and @code{HUGE_VAL} expand to a function address
|
|
rather than a floating point constant on some platforms:
|
|
Solaris 10.
|
|
@end itemize
|
|
|
|
Portability problems not fixed by Gnulib:
|
|
@itemize
|
|
@item
|
|
@code{NAN} is not a compile time constant with some compilers:
|
|
OSF/1 with Compaq (ex-DEC) C 6.4.
|
|
@end itemize
|