| # Configure a more-standard replacement for <time.h>. |
| |
| # Copyright (C) 2000-2001, 2003-2007, 2009-2021 Free Software Foundation, Inc. |
| |
| # serial 18 |
| |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| # Written by Paul Eggert and Jim Meyering. |
| |
| AC_DEFUN_ONCE([gl_TIME_H], |
| [ |
| dnl Ensure to expand the default settings once only, before all statements |
| dnl that occur in other macros. |
| AC_REQUIRE([gl_TIME_H_DEFAULTS]) |
| |
| gl_NEXT_HEADERS([time.h]) |
| AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC]) |
| |
| AC_REQUIRE([AC_C_RESTRICT]) |
| |
| AC_CACHE_CHECK([for TIME_UTC in <time.h>], |
| [gl_cv_time_h_has_TIME_UTC], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <time.h> |
| ]], |
| [[static int x = TIME_UTC; x++;]])], |
| [gl_cv_time_h_has_TIME_UTC=yes], |
| [gl_cv_time_h_has_TIME_UTC=no])]) |
| if test $gl_cv_time_h_has_TIME_UTC = yes; then |
| TIME_H_DEFINES_TIME_UTC=1 |
| else |
| TIME_H_DEFINES_TIME_UTC=0 |
| fi |
| AC_SUBST([TIME_H_DEFINES_TIME_UTC]) |
| ]) |
| |
| dnl Check whether 'struct timespec' is declared |
| dnl in time.h, sys/time.h, pthread.h, or unistd.h. |
| |
| AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC], |
| [ |
| AC_CHECK_HEADERS_ONCE([sys/time.h]) |
| AC_CACHE_CHECK([for struct timespec in <time.h>], |
| [gl_cv_sys_struct_timespec_in_time_h], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <time.h> |
| ]], |
| [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], |
| [gl_cv_sys_struct_timespec_in_time_h=yes], |
| [gl_cv_sys_struct_timespec_in_time_h=no])]) |
| |
| TIME_H_DEFINES_STRUCT_TIMESPEC=0 |
| SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0 |
| PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0 |
| UNISTD_H_DEFINES_STRUCT_TIMESPEC=0 |
| if test $gl_cv_sys_struct_timespec_in_time_h = yes; then |
| TIME_H_DEFINES_STRUCT_TIMESPEC=1 |
| else |
| AC_CACHE_CHECK([for struct timespec in <sys/time.h>], |
| [gl_cv_sys_struct_timespec_in_sys_time_h], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <sys/time.h> |
| ]], |
| [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], |
| [gl_cv_sys_struct_timespec_in_sys_time_h=yes], |
| [gl_cv_sys_struct_timespec_in_sys_time_h=no])]) |
| if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then |
| SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1 |
| else |
| AC_CACHE_CHECK([for struct timespec in <pthread.h>], |
| [gl_cv_sys_struct_timespec_in_pthread_h], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <pthread.h> |
| ]], |
| [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], |
| [gl_cv_sys_struct_timespec_in_pthread_h=yes], |
| [gl_cv_sys_struct_timespec_in_pthread_h=no])]) |
| if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then |
| PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1 |
| else |
| AC_CACHE_CHECK([for struct timespec in <unistd.h>], |
| [gl_cv_sys_struct_timespec_in_unistd_h], |
| [AC_COMPILE_IFELSE( |
| [AC_LANG_PROGRAM( |
| [[#include <unistd.h> |
| ]], |
| [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], |
| [gl_cv_sys_struct_timespec_in_unistd_h=yes], |
| [gl_cv_sys_struct_timespec_in_unistd_h=no])]) |
| if test $gl_cv_sys_struct_timespec_in_unistd_h = yes; then |
| UNISTD_H_DEFINES_STRUCT_TIMESPEC=1 |
| fi |
| fi |
| fi |
| fi |
| AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC]) |
| AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC]) |
| AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC]) |
| AC_SUBST([UNISTD_H_DEFINES_STRUCT_TIMESPEC]) |
| ]) |
| |
| # gl_TIME_MODULE_INDICATOR([modulename]) |
| # sets the shell variable that indicates the presence of the given module |
| # to a C preprocessor expression that will evaluate to 1. |
| # This macro invocation must not occur in macros that are AC_REQUIREd. |
| AC_DEFUN([gl_TIME_MODULE_INDICATOR], |
| [ |
| dnl Ensure to expand the default settings once only. |
| gl_TIME_H_REQUIRE_DEFAULTS |
| gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
| dnl Define it also as a C macro, for the benefit of the unit tests. |
| gl_MODULE_INDICATOR_FOR_TESTS([$1]) |
| ]) |
| |
| # Initializes the default values for AC_SUBSTed shell variables. |
| # This macro must not be AC_REQUIREd. It must only be invoked, and only |
| # outside of macros or in macros that are not AC_REQUIREd. |
| AC_DEFUN([gl_TIME_H_REQUIRE_DEFAULTS], |
| [ |
| m4_defun(GL_MODULE_INDICATOR_PREFIX[_TIME_H_MODULE_INDICATOR_DEFAULTS], [ |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CTIME]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MKTIME]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LOCALTIME]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_NANOSLEEP]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRFTIME]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRPTIME]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIMEGM]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIMESPEC_GET]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIME_R]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TIME_RZ]) |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TZSET]) |
| dnl Support Microsoft deprecated alias function names by default. |
| gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_TZSET], [1]) |
| ]) |
| m4_require(GL_MODULE_INDICATOR_PREFIX[_TIME_H_MODULE_INDICATOR_DEFAULTS]) |
| AC_REQUIRE([gl_TIME_H_DEFAULTS]) |
| ]) |
| |
| AC_DEFUN([gl_TIME_H_DEFAULTS], |
| [ |
| dnl Assume proper GNU behavior unless another module says otherwise. |
| HAVE_DECL_LOCALTIME_R=1; AC_SUBST([HAVE_DECL_LOCALTIME_R]) |
| HAVE_NANOSLEEP=1; AC_SUBST([HAVE_NANOSLEEP]) |
| HAVE_STRPTIME=1; AC_SUBST([HAVE_STRPTIME]) |
| HAVE_TIMEGM=1; AC_SUBST([HAVE_TIMEGM]) |
| HAVE_TIMESPEC_GET=1; AC_SUBST([HAVE_TIMESPEC_GET]) |
| dnl Even GNU libc does not have timezone_t yet. |
| HAVE_TIMEZONE_T=0; AC_SUBST([HAVE_TIMEZONE_T]) |
| dnl If another module says to replace or to not replace, do that. |
| dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK; |
| dnl this lets maintainers check for portability. |
| REPLACE_CTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_CTIME]) |
| REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R]) |
| REPLACE_MKTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_MKTIME]) |
| REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP]) |
| REPLACE_STRFTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_STRFTIME]) |
| REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM]) |
| REPLACE_TZSET=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TZSET]) |
| |
| dnl Hack so that the time module doesn't depend on the sys_time module. |
| dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent. |
| : ${GNULIB_GETTIMEOFDAY=0}; AC_SUBST([GNULIB_GETTIMEOFDAY]) |
| dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME |
| dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier |
| dnl is no longer a big deal. |
| REPLACE_GMTIME=0; AC_SUBST([REPLACE_GMTIME]) |
| REPLACE_LOCALTIME=0; AC_SUBST([REPLACE_LOCALTIME]) |
| ]) |
