libvlc_version.h: build-time version macros

(cherry picked from commit 20703d1eb24516fd4cebadc038db3f30d14f5abc)

include/vlc/libvlc_version.h.in

+/*****************************************************************************
+ * libvlc_version.h
+ *****************************************************************************
+ * Copyright (C) 2010 Rémi Denis-Courmont
+ *
+ * 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 of the License, 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.
+ *****************************************************************************/
+
+/**
+ * \file
+ * This file defines version macros for LibVLC.
+ * Those macros are primilarly intended for conditional (pre)compilation.
+ * To get the run-time LibVLC version, use libvlc_get_version() instead
+ * (the run-time version may be more recent than build-time one, thanks to
+ * backward binary compatibility).
+ *
+ * \version This header file is available in LibVLC 1.1.4 and higher.
+ */
+
+#ifndef LIBVLC_VERSION_H
+# define LIBVLC_VERSION_H 1
+
+/** LibVLC major version number */
+# define LIBVLC_VERSION_MAJOR    (@VERSION_MAJOR@)
+
+/** LibVLC minor version number */
+# define LIBVLC_VERSION_MINOR    (@VERSION_MINOR@)
+
+/** LibVLC revision */
+# define LIBVLC_VERSION_REVISION (@VERSION_REVISION@)
+
+# define LIBVLC_VERSION_EXTRA    (0)
+
+/** Makes a single integer from a LibVLC version numbers */
+# define LIBVLC_VERSION(maj,min,rev,extra) \
+         ((maj << 24) | (min << 16) | (rev << 8) | (extra))
+
+/** LibVLC full version as a single integer (for comparison) */
+# define LIBVLC_VERSION_INT \
+         LIBVLC_VERSION(LIBVLC_VERSION_MAJOR, LIBVLC_VERSION_MINOR, \
+                        LIBVLC_VERSION_EXTRA, LIBVLC_VERSION_EXTRA)
+
+#endif

src/Makefile.am

@@ -11,9 +11,12 @@ EXTRA_DIST = extras/COPYING \
 	libvlc.pc.in \
 	vlc-plugin.pc.in \
 	libvlc.sym \
-	libvlccore.sym
+	libvlccore.sym \
+	../include/vlc/libvlc_version.h.in
 
-BUILT_SOURCES = ../include/vlc_about.h
+BUILT_SOURCES = \
+	$(nodist_pkginclude_HEADERS) \
+	../include/vlc_about.h
 CLEANFILES = $(BUILT_SOURCES)
 
 SUFFIXES = .pc.in .pc .rc.in .rc
@@ -38,6 +41,7 @@ pkginclude_HEADERS = \
 	../include/vlc/libvlc_structures.h \
 	../include/vlc/libvlc_vlm.h \
 	$(NULL)
+nodist_pkginclude_HEADERS = ../include/vlc/libvlc_version.h
 
 pluginsinclude_HEADERS = \
 	../include/vlc_access.h \
@@ -127,6 +131,9 @@ noinst_HEADERS = \
 	../include/vlc_windows_interfaces.h \
 	$(NULL)
 
+../include/vlc/libvlc_version.h: ../include/vlc/libvlc_version.h.in $(top_builddir)/config.status
+	$(SHELL) $(top_builddir)/config.status --file=$@
+
 ../include/vlc_about.h: Makefile.am $(top_srcdir)/COPYING $(top_srcdir)/THANKS $(top_srcdir)/AUTHORS
 	$(AM_V_at)rm -f -- "$@.tmp"
 	$(AM_V_at)mkdir -p -- ../include