Imported Upstream version 1.5

[debian/gzip] / m4 / sys_time_h.m4

diff --git a/m4/sys_time_h.m4 b/m4/sys_time_h.m4
index 9c16487957bc27ffd4ade8eba9943b1fb138df5d..26eaf8ea7f30d50c2fe300eab823e510f1dd4028 100644 (file)
--- a/m4/sys_time_h.m4
+++ b/m4/sys_time_h.m4
@@ -1,7 +1,7 @@
 # Configure a replacement for <sys/time.h>.
-# serial 2
+# serial 8
 
-# Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
+# Copyright (C) 2007, 2009-2012 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.
@@ -19,16 +19,17 @@ AC_DEFUN([gl_HEADER_SYS_TIME_H],
 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=1
-  else
+  if test $ac_cv_header_sys_time_h != yes; then
     HAVE_SYS_TIME_H=0
   fi
-  AC_SUBST([HAVE_SYS_TIME_H])
 
+  dnl On native Windows with MSVC, 'struct timeval' is defined in <winsock2.h>
+  dnl only. So include that header in the list.
+  gl_PREREQ_SYS_H_WINSOCK2
   AC_CACHE_CHECK([for struct timeval], [gl_cv_sys_struct_timeval],
     [AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM(
@@ -36,24 +37,70 @@ AC_DEFUN([gl_HEADER_SYS_TIME_H_BODY],
              #include <sys/time.h>
             #endif
             #include <time.h>
+            #if HAVE_WINSOCK2_H
+            # include <winsock2.h>
+            #endif
           ]],
           [[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=1
-  else
+       [gl_cv_sys_struct_timeval=no])
+    ])
+  if test $gl_cv_sys_struct_timeval != yes; then
     HAVE_STRUCT_TIMEVAL=0
+  else
+    dnl On native Windows with a 64-bit 'time_t', 'struct timeval' is defined
+    dnl (in <sys/time.h> and <winsock2.h> for mingw64, in <winsock2.h> only
+    dnl for MSVC) with a tv_sec field of type 'long' (32-bit!), which is
+    dnl smaller than the 'time_t' type mandated by POSIX.
+    AC_CACHE_CHECK([for correct struct timeval.tv_sec member],
+      [gl_cv_sys_struct_timeval_tv_sec],
+      [AC_COMPILE_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#if HAVE_SYS_TIME_H
+               #include <sys/time.h>
+              #endif
+              #include <time.h>
+              #if HAVE_WINSOCK2_H
+              # include <winsock2.h>
+              #endif
+            ]],
+            [[static struct timeval x;
+              typedef int verify_tv_sec_type[sizeof (x.tv_sec) == sizeof (time_t) ? 1 : -1];
+            ]])],
+         [gl_cv_sys_struct_timeval_tv_sec=yes],
+         [gl_cv_sys_struct_timeval_tv_sec=no])
+      ])
+    if test $gl_cv_sys_struct_timeval_tv_sec != yes; then
+      REPLACE_STRUCT_TIMEVAL=1
+    fi
   fi
-  AC_SUBST([HAVE_STRUCT_TIMEVAL])
 
+  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])
+  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])
+])
+
+AC_DEFUN([gl_HEADER_SYS_TIME_H_DEFAULTS],
+[
+  GNULIB_GETTIMEOFDAY=0;     AC_SUBST([GNULIB_GETTIMEOFDAY])
   dnl Assume POSIX behavior unless another module says otherwise.
-  REPLACE_GETTIMEOFDAY=0
-  AC_SUBST([REPLACE_GETTIMEOFDAY])
-  if test $HAVE_SYS_TIME_H = 0 || test $HAVE_STRUCT_TIMEVAL = 0; then
-    SYS_TIME_H=sys/time.h
-  else
-    SYS_TIME_H=
-  fi
-  AC_SUBST([SYS_TIME_H])
+  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])
+  REPLACE_STRUCT_TIMEVAL=0;  AC_SUBST([REPLACE_STRUCT_TIMEVAL])
 ])