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authorKim Kibum <kb0929.kim@samsung.com>2012-05-21 17:40:28 +0900
committerKim Kibum <kb0929.kim@samsung.com>2012-05-21 17:40:28 +0900
commit5fab833656f8722f000d40da4733c164690a18df (patch)
tree06c6b7063a663592937cbcd47dd400ac931e0490 /m4/sys_time_h.m4
parent43e15e32d26b017f436da3dd40334b4df292e5a5 (diff)
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Diffstat (limited to 'm4/sys_time_h.m4')
-rw-r--r--m4/sys_time_h.m472
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diff --git a/m4/sys_time_h.m4 b/m4/sys_time_h.m4
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+# Configure a replacement for <sys/time.h>.
+# serial 5
+
+# Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
+# 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 Martin Lambers.
+
+AC_DEFUN([gl_HEADER_SYS_TIME_H],
+[
+ dnl Use AC_REQUIRE here, so that the REPLACE_GETTIMEOFDAY=0 statement
+ dnl below is expanded once only, before all REPLACE_GETTIMEOFDAY=1
+ dnl statements that occur in other macros.
+ AC_REQUIRE([gl_HEADER_SYS_TIME_H_BODY])
+])
+
+AC_DEFUN([gl_HEADER_SYS_TIME_H_BODY],
+[
+ AC_REQUIRE([AC_C_RESTRICT])
+ AC_REQUIRE([gl_HEADER_SYS_TIME_H_DEFAULTS])
+ AC_CHECK_HEADERS_ONCE([sys/time.h])
+ gl_CHECK_NEXT_HEADERS([sys/time.h])
+
+ if test $ac_cv_header_sys_time_h != yes; then
+ HAVE_SYS_TIME_H=0
+ fi
+
+ AC_CACHE_CHECK([for struct timeval], [gl_cv_sys_struct_timeval],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#if HAVE_SYS_TIME_H
+ #include <sys/time.h>
+ #endif
+ #include <time.h>
+ ]],
+ [[static struct timeval x; x.tv_sec = x.tv_usec;]])],
+ [gl_cv_sys_struct_timeval=yes],
+ [gl_cv_sys_struct_timeval=no])])
+ if test $gl_cv_sys_struct_timeval != yes; then
+ HAVE_STRUCT_TIMEVAL=0
+ fi
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[
+#if HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <time.h>
+ ]], [gettimeofday])
+])
+
+AC_DEFUN([gl_SYS_TIME_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_HEADER_SYS_TIME_H_DEFAULTS])
+ GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+ dnl Define it also as a C macro, for the benefit of the unit tests.
+ gl_MODULE_INDICATOR([$1])
+])
+
+AC_DEFUN([gl_HEADER_SYS_TIME_H_DEFAULTS],
+[
+ GNULIB_GETTIMEOFDAY=0; AC_SUBST([GNULIB_GETTIMEOFDAY])
+ dnl Assume POSIX behavior unless another module says otherwise.
+ HAVE_GETTIMEOFDAY=1; AC_SUBST([HAVE_GETTIMEOFDAY])
+ HAVE_STRUCT_TIMEVAL=1; AC_SUBST([HAVE_STRUCT_TIMEVAL])
+ HAVE_SYS_TIME_H=1; AC_SUBST([HAVE_SYS_TIME_H])
+ REPLACE_GETTIMEOFDAY=0; AC_SUBST([REPLACE_GETTIMEOFDAY])
+])