diff options
Diffstat (limited to 'm4/gettimeofday.m4')
| -rw-r--r-- | m4/gettimeofday.m4 | 61 |
1 files changed, 1 insertions, 60 deletions
diff --git a/m4/gettimeofday.m4 b/m4/gettimeofday.m4 index c72b3eacc63..578ed49b077 100644 --- a/m4/gettimeofday.m4 +++ b/m4/gettimeofday.m4 @@ -1,4 +1,4 @@ -# serial 27 +# serial 28 # Copyright (C) 2001-2003, 2005, 2007, 2009-2020 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation @@ -19,7 +19,6 @@ AC_DEFUN([gl_FUNC_GETTIMEOFDAY], if test $ac_cv_func_gettimeofday != yes; then HAVE_GETTIMEOFDAY=0 else - gl_FUNC_GETTIMEOFDAY_CLOBBER AC_CACHE_CHECK([for gettimeofday with POSIX signature], [gl_cv_func_gettimeofday_posix_signature], [AC_COMPILE_IFELSE( @@ -66,63 +65,5 @@ int gettimeofday (struct timeval *restrict, struct timezone *restrict); declaration of the second argument to gettimeofday.]) ]) - -dnl See if gettimeofday clobbers the static buffer that localtime uses -dnl for its return value. The gettimeofday function from Mac OS X 10.0.4 -dnl (i.e., Darwin 1.3.7) has this problem. -dnl -dnl If it does, then arrange to use gettimeofday and localtime only via -dnl the wrapper functions that work around the problem. - -AC_DEFUN([gl_FUNC_GETTIMEOFDAY_CLOBBER], -[ - AC_REQUIRE([gl_HEADER_SYS_TIME_H]) - AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles - AC_REQUIRE([gl_LOCALTIME_BUFFER_DEFAULTS]) - - AC_CACHE_CHECK([whether gettimeofday clobbers localtime buffer], - [gl_cv_func_gettimeofday_clobber], - [AC_RUN_IFELSE( - [AC_LANG_PROGRAM( - [[#include <string.h> - #include <sys/time.h> - #include <time.h> - #include <stdlib.h> - ]], - [[ - time_t t = 0; - struct tm *lt; - struct tm saved_lt; - struct timeval tv; - lt = localtime (&t); - saved_lt = *lt; - gettimeofday (&tv, NULL); - return memcmp (lt, &saved_lt, sizeof (struct tm)) != 0; - ]])], - [gl_cv_func_gettimeofday_clobber=no], - [gl_cv_func_gettimeofday_clobber=yes], - [# When cross-compiling: - case "$host_os" in - # Guess all is fine on glibc systems. - *-gnu* | gnu*) gl_cv_func_gettimeofday_clobber="guessing no" ;; - # Guess all is fine on musl systems. - *-musl*) gl_cv_func_gettimeofday_clobber="guessing no" ;; - # Guess no on native Windows. - mingw*) gl_cv_func_gettimeofday_clobber="guessing no" ;; - # If we don't know, obey --enable-cross-guesses. - *) gl_cv_func_gettimeofday_clobber="$gl_cross_guess_inverted" ;; - esac - ])]) - - case "$gl_cv_func_gettimeofday_clobber" in - *yes) - REPLACE_GETTIMEOFDAY=1 - AC_DEFINE([GETTIMEOFDAY_CLOBBERS_LOCALTIME], [1], - [Define if gettimeofday clobbers the localtime buffer.]) - gl_LOCALTIME_BUFFER_NEEDED - ;; - esac -]) - # Prerequisites of lib/gettimeofday.c. AC_DEFUN([gl_PREREQ_GETTIMEOFDAY], [:]) |