Make <sys/select.h> self-contained, i.e. make it possible to include it

without prior <sys/types.h>.

diff --git a/ChangeLog b/ChangeLog
index 6963063..ce766eb 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2007-03-03  Bruno Haible  <bruno@clisp.org>
+
+       * lib/sys_select_.h: New file.
+       * m4/sys_socket_h.m4 (gl_HEADER_SYS_SELECT): Test whether sys/select.h
+       is self-contained. Set ABSOLUTE_SYS_SELECT_H, HAVE_SYS_SELECT_H.
+       * modules/sys_select (Files): Add lib/sys_select_.h.
+       (Depends-on): Add absolute-header.
+       (Makefile.am): Substitute ABSOLUTE_SYS_SELECT_H, HAVE_SYS_SELECT_H
+       into sys/select.h.
+
 2007-03-02  Bruno Haible  <bruno@clisp.org>
 
        * lib/socket_.h: If sys/socket.h exists, include that and <sys/types.h>

diff --git a/lib/sys_select_.h b/lib/sys_select_.h
new file mode 100644 (file)
index 0000000..d79de88
--- /dev/null
+++ b/lib/sys_select_.h
@@ -0,0 +1,37 @@
+/* Substitute for <sys/select.h>.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#ifndef _GL_SYS_SELECT_H
+#define _GL_SYS_SELECT_H
+
+#if @HAVE_SYS_SELECT_H@
+
+/* On many platforms, <sys/select.h> assumes prior inclusion of
+   <sys/types.h>.  */
+
+# include <sys/types.h>
+# include @ABSOLUTE_SYS_SELECT_H@
+
+#else
+
+/* A platform that lacks <sys/select.h>.  */
+
+# include <sys/socket.h>
+
+#endif
+
+#endif /* _GL_SYS_SELECT_H */

diff --git a/modules/sys_select b/modules/sys_select
index be92f4b..f182f26 100644 (file)
--- a/modules/sys_select
+++ b/modules/sys_select
@@ -1,10 +1,12 @@
 Description:
-A <sys/select.h> for systems lacking it (e.g., Mingw).
+A <sys/select.h> for systems lacking it.
 
 Files:
+lib/sys_select_.h
 m4/sys_select_h.m4
 
 Depends-on:
+absolute-header
 sys_socket
 
 configure.ac:
@@ -20,7 +22,9 @@ sys/select.h:
        @MKDIR_P@ sys
        rm -f $@-t $@
        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
-         echo '#include <sys/socket.h>'; \
+         sed -e 's|@''ABSOLUTE_SYS_SELECT_H''@|$(ABSOLUTE_SYS_SELECT_H)|g' \
+             -e 's|@''HAVE_SYS_SELECT_H''@|$(HAVE_SYS_SELECT_H)|g' \
+             < $(srcdir)/sys_select_.h; \
        } > $@-t
        mv $@-t $@
 MOSTLYCLEANFILES += sys/select.h sys/select.h-t