# Configure a replacement for <sys/time.h>.
+# serial 6
-# Copyright (C) 2007 Free Software Foundation, Inc.
+# 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.
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])
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;]])],
+ [[#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=1
- else
+ if test $gl_cv_sys_struct_timeval != yes; then
HAVE_STRUCT_TIMEVAL=0
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])
])