Mercurial > gnulib
view m4/minus-zero.m4 @ 17363:5a51fb7777a9
sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin
Problem reported by Marco Atzeri in
<http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>.
* lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]:
Simply delegate to the system <sys/select.h> in this case too.
Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only
if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to
be needed on Solaris either.
* lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]:
Simply delgate to the system <sys/time.h> in this case.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Tue, 19 Mar 2013 09:08:47 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
line wrap: on
line source
# minus-zero.m4 serial 2 dnl Copyright (C) 2010-2013 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. # Macros for floating-point negative zero. # Keep in sync with tests/minus-zero.h! # Expands to code that defines a variable or macro minus_zerof. AC_DEFUN([gl_FLOAT_MINUS_ZERO_CODE], [[ #include <float.h> /* minus_zerof represents the value -0.0f. */ /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f. ICC 10.0 has a bug when optimizing the expression -zero. The expression -FLT_MIN * FLT_MIN does not work when cross-compiling to PowerPC on Mac OS X 10.5. */ #if defined __hpux || defined __sgi || defined __ICC static float compute_minus_zerof (void) { return -FLT_MIN * FLT_MIN; } # define minus_zerof compute_minus_zerof () #else float minus_zerof = -0.0f; #endif ]]) # Expands to code that defines a variable or macro minus_zerod. AC_DEFUN([gl_DOUBLE_MINUS_ZERO_CODE], [[ #include <float.h> /* minus_zerod represents the value -0.0. */ /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0. ICC 10.0 has a bug when optimizing the expression -zero. The expression -DBL_MIN * DBL_MIN does not work when cross-compiling to PowerPC on Mac OS X 10.5. */ #if defined __hpux || defined __sgi || defined __ICC static double compute_minus_zerod (void) { return -DBL_MIN * DBL_MIN; } # define minus_zerod compute_minus_zerod () #else double minus_zerod = -0.0; #endif ]]) # Expands to code that defines a variable or macro minus_zerol. AC_DEFUN([gl_LONG_DOUBLE_MINUS_ZERO_CODE], [[ #include <float.h> #if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__) # undef LDBL_MIN # define LDBL_MIN 3.3621031431120935063E-4932L #endif /* minus_zerol represents the value -0.0L. */ /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0L. IRIX cc can't put -0.0L into .data, but can compute at runtime. ICC 10.0 has a bug when optimizing the expression -zero. The expression -LDBL_MIN * LDBL_MIN does not work when cross-compiling to PowerPC on Mac OS X 10.5. */ #if defined __hpux || defined __sgi || defined __ICC static long double compute_minus_zerol (void) { return -LDBL_MIN * LDBL_MIN; } # define minus_zerol compute_minus_zerol () #else long double minus_zerol = -0.0L; #endif ]])