-# sys_select_h.m4 serial 8
-dnl Copyright (C) 2006-2009 Free Software Foundation, Inc.
+# sys_select_h.m4 serial 14
+dnl Copyright (C) 2006-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl 2. On OSF/1 4.0, <sys/select.h> provides only a forward declaration
dnl of 'struct timeval', and no definition of this type.
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/select.h>]],
- [[struct timeval b;]])],
+ [[struct timeval b;]])],
[gl_cv_header_sys_select_h_selfcontained=yes],
[gl_cv_header_sys_select_h_selfcontained=no])
dnl Test against another bug:
])
fi
])
- if test $gl_cv_header_sys_select_h_selfcontained = yes; then
- SYS_SELECT_H=''
+ AC_CHECK_HEADERS_ONCE([sys/select.h])
+ dnl <sys/select.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([sys/select.h])
+ if test $ac_cv_header_sys_select_h = yes; then
+ HAVE_SYS_SELECT_H=1
else
- SYS_SELECT_H='sys/select.h'
- gl_CHECK_NEXT_HEADERS([sys/select.h])
- if test $ac_cv_header_sys_select_h = yes; then
- HAVE_SYS_SELECT_H=1
- else
- HAVE_SYS_SELECT_H=0
- fi
- AC_SUBST([HAVE_SYS_SELECT_H])
- gl_PREREQ_SYS_H_WINSOCK2
+ HAVE_SYS_SELECT_H=0
fi
- AC_SUBST([SYS_SELECT_H])
+ AC_SUBST([HAVE_SYS_SELECT_H])
+ gl_PREREQ_SYS_H_WINSOCK2
+
+ 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([[
+/* Some systems require prerequisite headers. */
+#include <sys/types.h>
+#if !defined __GLIBC__ && HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/select.h>
+ ]], [select])
])
AC_DEFUN([gl_SYS_SELECT_MODULE_INDICATOR],
[
dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
AC_REQUIRE([gl_SYS_SELECT_H_DEFAULTS])
- GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+ 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_SYS_SELECT_H_DEFAULTS],