Mercurial > gnulib
view m4/fmodf.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 |
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# fmodf.m4 serial 5 dnl Copyright (C) 2011-2013 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. AC_DEFUN([gl_FUNC_FMODF], [ m4_divert_text([DEFAULTS], [gl_fmodf_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_FMOD]) dnl Persuade glibc <math.h> to declare fmodf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether fmodf() exists. Assume that fmodf(), if it exists, is dnl defined in the same library as fmod(). save_LIBS="$LIBS" LIBS="$LIBS $FMOD_LIBM" AC_CHECK_FUNCS([fmodf]) LIBS="$save_LIBS" if test $ac_cv_func_fmodf = yes; then FMODF_LIBM="$FMOD_LIBM" m4_ifdef([gl_FUNC_FMODF_IEEE], [ if test $gl_fmodf_required = ieee && test $REPLACE_FMODF = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether fmodf works according to ISO C 99 with IEC 60559], [gl_cv_func_fmodf_ieee], [ save_LIBS="$LIBS" LIBS="$LIBS $FMODF_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> /* Compare two numbers with ==. This is a separate function because IRIX 6.5 "cc -O" miscompiles an 'x == x' test. */ static int numeric_equal (float x, float y) { return x == y; } static float dummy (float x, float y) { return 0; } int main (int argc, char *argv[]) { float (*my_fmodf) (float, float) = argc ? fmodf : dummy; float f; /* Test fmodf(...,0.0f). This test fails on OSF/1 5.1. */ f = my_fmodf (2.0f, 0.0f); if (numeric_equal (f, f)) return 1; return 0; } ]])], [gl_cv_func_fmodf_ieee=yes], [gl_cv_func_fmodf_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu*) gl_cv_func_fmodf_ieee="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_fmodf_ieee="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_fmodf_ieee" in *yes) ;; *) REPLACE_FMODF=1 ;; esac fi ]) else HAVE_FMODF=0 fi if test $HAVE_FMODF = 0 || test $REPLACE_FMODF = 1; then dnl Find libraries needed to link lib/fmodf.c. FMODF_LIBM="$FMOD_LIBM" fi AC_SUBST([FMODF_LIBM]) ])