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Annotation of embedaddon/libiconv/srcm4/time_h.m4, revision 1.1

1.1     ! misho       1: # Configure a more-standard replacement for <time.h>.
        !             2: 
        !             3: # Copyright (C) 2000-2001, 2003-2007, 2009-2011 Free Software Foundation, Inc.
        !             4: 
        !             5: # serial 4
        !             6: 
        !             7: # This file is free software; the Free Software Foundation
        !             8: # gives unlimited permission to copy and/or distribute it,
        !             9: # with or without modifications, as long as this notice is preserved.
        !            10: 
        !            11: # Written by Paul Eggert and Jim Meyering.
        !            12: 
        !            13: AC_DEFUN([gl_HEADER_TIME_H],
        !            14: [
        !            15:   dnl Use AC_REQUIRE here, so that the default behavior below is expanded
        !            16:   dnl once only, before all statements that occur in other macros.
        !            17:   AC_REQUIRE([gl_HEADER_TIME_H_BODY])
        !            18: ])
        !            19: 
        !            20: AC_DEFUN([gl_HEADER_TIME_H_BODY],
        !            21: [
        !            22:   AC_REQUIRE([AC_C_RESTRICT])
        !            23:   AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
        !            24:   gl_NEXT_HEADERS([time.h])
        !            25:   AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
        !            26: ])
        !            27: 
        !            28: dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared
        !            29: dnl in time.h, sys/time.h, or pthread.h.
        !            30: 
        !            31: AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
        !            32: [
        !            33:   AC_CHECK_HEADERS_ONCE([sys/time.h])
        !            34:   AC_CACHE_CHECK([for struct timespec in <time.h>],
        !            35:     [gl_cv_sys_struct_timespec_in_time_h],
        !            36:     [AC_COMPILE_IFELSE(
        !            37:        [AC_LANG_PROGRAM(
        !            38:           [[#include <time.h>
        !            39:           ]],
        !            40:           [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
        !            41:        [gl_cv_sys_struct_timespec_in_time_h=yes],
        !            42:        [gl_cv_sys_struct_timespec_in_time_h=no])])
        !            43: 
        !            44:   TIME_H_DEFINES_STRUCT_TIMESPEC=0
        !            45:   SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
        !            46:   PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0
        !            47:   if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
        !            48:     TIME_H_DEFINES_STRUCT_TIMESPEC=1
        !            49:   else
        !            50:     AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
        !            51:       [gl_cv_sys_struct_timespec_in_sys_time_h],
        !            52:       [AC_COMPILE_IFELSE(
        !            53:          [AC_LANG_PROGRAM(
        !            54:             [[#include <sys/time.h>
        !            55:             ]],
        !            56:             [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
        !            57:          [gl_cv_sys_struct_timespec_in_sys_time_h=yes],
        !            58:          [gl_cv_sys_struct_timespec_in_sys_time_h=no])])
        !            59:     if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
        !            60:       SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
        !            61:     else
        !            62:       AC_CACHE_CHECK([for struct timespec in <pthread.h>],
        !            63:         [gl_cv_sys_struct_timespec_in_pthread_h],
        !            64:         [AC_COMPILE_IFELSE(
        !            65:            [AC_LANG_PROGRAM(
        !            66:               [[#include <pthread.h>
        !            67:               ]],
        !            68:               [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
        !            69:            [gl_cv_sys_struct_timespec_in_pthread_h=yes],
        !            70:            [gl_cv_sys_struct_timespec_in_pthread_h=no])])
        !            71:       if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then
        !            72:         PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1
        !            73:       fi
        !            74:     fi
        !            75:   fi
        !            76:   AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC])
        !            77:   AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC])
        !            78:   AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC])
        !            79: ])
        !            80: 
        !            81: AC_DEFUN([gl_TIME_MODULE_INDICATOR],
        !            82: [
        !            83:   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
        !            84:   AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
        !            85:   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
        !            86:   dnl Define it also as a C macro, for the benefit of the unit tests.
        !            87:   gl_MODULE_INDICATOR_FOR_TESTS([$1])
        !            88: ])
        !            89: 
        !            90: AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS],
        !            91: [
        !            92:   GNULIB_MKTIME=0;                       AC_SUBST([GNULIB_MKTIME])
        !            93:   GNULIB_NANOSLEEP=0;                    AC_SUBST([GNULIB_NANOSLEEP])
        !            94:   GNULIB_STRPTIME=0;                     AC_SUBST([GNULIB_STRPTIME])
        !            95:   GNULIB_TIMEGM=0;                       AC_SUBST([GNULIB_TIMEGM])
        !            96:   GNULIB_TIME_R=0;                       AC_SUBST([GNULIB_TIME_R])
        !            97:   dnl Assume proper GNU behavior unless another module says otherwise.
        !            98:   HAVE_DECL_LOCALTIME_R=1;               AC_SUBST([HAVE_DECL_LOCALTIME_R])
        !            99:   HAVE_NANOSLEEP=1;                      AC_SUBST([HAVE_NANOSLEEP])
        !           100:   HAVE_STRPTIME=1;                       AC_SUBST([HAVE_STRPTIME])
        !           101:   HAVE_TIMEGM=1;                         AC_SUBST([HAVE_TIMEGM])
        !           102:   dnl If another module says to replace or to not replace, do that.
        !           103:   dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
        !           104:   dnl this lets maintainers check for portability.
        !           105:   REPLACE_LOCALTIME_R=GNULIB_PORTCHECK;  AC_SUBST([REPLACE_LOCALTIME_R])
        !           106:   REPLACE_MKTIME=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_MKTIME])
        !           107:   REPLACE_NANOSLEEP=GNULIB_PORTCHECK;    AC_SUBST([REPLACE_NANOSLEEP])
        !           108:   REPLACE_TIMEGM=GNULIB_PORTCHECK;       AC_SUBST([REPLACE_TIMEGM])
        !           109: ])