Mercurial > gnulib
view m4/ceil.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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# ceil.m4 serial 9 dnl Copyright (C) 2007, 2009-2013 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_CEIL], [ m4_divert_text([DEFAULTS], [gl_ceil_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) dnl Test whether ceil() can be used without libm. gl_FUNC_CEIL_LIBS if test "$CEIL_LIBM" = "?"; then CEIL_LIBM= fi m4_ifdef([gl_FUNC_CEIL_IEEE], [ if test $gl_ceil_required = ieee && test $REPLACE_CEIL = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether ceil works according to ISO C 99 with IEC 60559], [gl_cv_func_ceil_ieee], [ save_LIBS="$LIBS" LIBS="$LIBS $CEIL_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> ]gl_DOUBLE_MINUS_ZERO_CODE[ ]gl_DOUBLE_SIGNBIT_CODE[ static double dummy (double f) { return 0; } int main (int argc, char *argv[]) { double (*my_ceil) (double) = argc ? ceil : dummy; int result = 0; /* Test whether ceil (-0.0) is -0.0. */ if (signbitd (minus_zerod) && !signbitd (my_ceil (minus_zerod))) result |= 1; /* Test whether ceil (-0.3) is -0.0. */ if (signbitd (-0.3) && !signbitd (my_ceil (-0.3))) result |= 2; return result; } ]])], [gl_cv_func_ceil_ieee=yes], [gl_cv_func_ceil_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu*) gl_cv_func_ceil_ieee="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_ceil_ieee="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_ceil_ieee" in *yes) ;; *) REPLACE_CEIL=1 ;; esac fi ]) if test $REPLACE_CEIL = 1; then dnl No libraries are needed to link lib/ceil.c. CEIL_LIBM= fi AC_SUBST([CEIL_LIBM]) ]) # Determines the libraries needed to get the ceil() function. # Sets CEIL_LIBM. AC_DEFUN([gl_FUNC_CEIL_LIBS], [ gl_CACHE_VAL_SILENT([gl_cv_func_ceil_libm], [ gl_cv_func_ceil_libm=? AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> double x;]], [[x = ceil(x);]])], [gl_cv_func_ceil_libm=]) if test "$gl_cv_func_ceil_libm" = "?"; then save_LIBS="$LIBS" LIBS="$LIBS -lm" AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> double x;]], [[x = ceil(x);]])], [gl_cv_func_ceil_libm="-lm"]) LIBS="$save_LIBS" fi ]) CEIL_LIBM="$gl_cv_func_ceil_libm" ])