Mercurial > gnulib
view m4/time_rz.m4 @ 40231:9b3c79fdfe0b
strtod: fix clash with strtold
Problem reported for RHEL 5 by Jesse Caldwell (Bug#34817).
* lib/strtod.c (compute_minus_zero, minus_zero):
Simplify by remving the macro / external variable,
and having just a function. User changed. This avoids
the need for an external variable that might clash.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Mon, 11 Mar 2019 16:40:29 -0700 |
parents | b06060465f09 |
children |
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dnl Time zone functions: tzalloc, localtime_rz, etc. dnl Copyright (C) 2015-2019 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. dnl Written by Paul Eggert. AC_DEFUN([gl_TIME_RZ], [ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) AC_REQUIRE([AC_STRUCT_TIMEZONE]) # Mac OS X 10.6 loops forever with some time_t values. # See Bug#27706, Bug#27736, and # https://lists.gnu.org/r/bug-gnulib/2017-07/msg00142.html AC_CACHE_CHECK([whether localtime loops forever near extrema], [gl_cv_func_localtime_infloop_bug], [gl_cv_func_localtime_infloop_bug=no AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#include <stdlib.h> #include <string.h> #include <unistd.h> #include <time.h> ]], [[ time_t t = -67768038400666600; struct tm *tm; char *tz = getenv ("TZ"); if (! (tz && strcmp (tz, "QQQ0") == 0)) return 0; alarm (2); tm = localtime (&t); /* Use TM and *TM to suppress over-optimization. */ return tm && tm->tm_isdst; ]])], [(TZ=QQQ0 ./conftest$EXEEXT) >/dev/null 2>&1 || gl_cv_func_localtime_infloop_bug=yes], [], [gl_cv_func_localtime_infloop_bug="guessing no"])]) if test "$gl_cv_func_localtime_infloop_bug" = yes; then AC_DEFINE([HAVE_LOCALTIME_INFLOOP_BUG], 1, [Define if localtime-like functions can loop forever on extreme arguments.]) fi AC_CHECK_TYPES([timezone_t], [], [], [[#include <time.h>]]) if test "$ac_cv_type_timezone_t" = yes; then HAVE_TIMEZONE_T=1 fi ])