build: rename version.h to libavutil/ffversion.h

Also the libavutil/ffversion.h will be installed.

Rationale:
* Applications might want to know FFmpeg's version besides the individual
  libraries'.
* Avoids file name clash between FFmpeg's ./version.h and lib*/version.h when
  a library source file includes both and is compiled on an out-of-tree build.

Fixes #1769.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

.gitignore

@@ -27,7 +27,6 @@
 /ffserver
 /config.*
 /coverage.info
-/version.h
 /doc/*.1
 /doc/*.3
 /doc/*.html
@@ -53,6 +52,7 @@
 /libavcodec/*_tables.c
 /libavcodec/*_tables.h
 /libavutil/avconfig.h
+/libavutil/ffversion.h
 /tests/audiogen
 /tests/base64
 /tests/data/

Makefile

@@ -119,8 +119,8 @@ GIT_LOG     = $(SRC_PATH)/.git/logs/HEAD
 .version: $(wildcard $(GIT_LOG)) $(VERSION_SH) config.mak
 .version: M=@
 
-version.h .version:
-	$(M)$(VERSION_SH) $(SRC_PATH) version.h $(EXTRA_VERSION)
+libavutil/ffversion.h .version:
+	$(M)$(VERSION_SH) $(SRC_PATH) libavutil/ffversion.h $(EXTRA_VERSION)
 	$(Q)touch .version
 
 # force version.sh to run whenever version might have changed
@@ -163,7 +163,7 @@ clean::
 
 distclean::
 	$(RM) $(DISTCLEANSUFFIXES)
-	$(RM) config.* .config libavutil/avconfig.h .version version.h libavcodec/codec_names.h
+	$(RM) config.* .config libavutil/avconfig.h .version libavutil/ffversion.h libavcodec/codec_names.h
 
 config:
 	$(SRC_PATH)/configure $(value FFMPEG_CONFIGURATION)

cmdutils.c

@@ -49,8 +49,8 @@
 #include "libavutil/dict.h"
 #include "libavutil/opt.h"
 #include "libavutil/cpu.h"
+#include "libavutil/ffversion.h"
 #include "cmdutils.h"
-#include "version.h"
 #if CONFIG_NETWORK
 #include "libavformat/network.h"
 #endif

doc/APIchanges

@@ -15,6 +15,10 @@ libavutil:     2012-10-22
 
 API changes, most recent first:
 
+2013-11-xx - xxxxxxx - lavu 52.56.100 - ffversion.h
+  Moves version.h to libavutil/ffversion.h.
+  Install ffversion.h and make it public.
+
 2013-11-xx - xxxxxxx- - lavu 52.19.0 - frame.h
   Add AV_FRAME_DATA_A53_CC value to the AVFrameSideDataType enum, which
   identifies ATSC A53 Part 4 Closed Captions data.

ffprobe.c

@@ -24,7 +24,7 @@
  */
 
 #include "config.h"
-#include "version.h"
+#include "libavutil/ffversion.h"
 
 #include <string.h>
 

libavutil/Makefile

@@ -62,7 +62,8 @@ ARCH_HEADERS = bswap.h                                                  \
                intreadwrite.h                                           \
                timer.h                                                  \
 
-BUILT_HEADERS = avconfig.h
+BUILT_HEADERS = avconfig.h                                              \
+                ffversion.h
 
 OBJS = adler32.o                                                        \
        aes.o                                                            \

libavutil/version.h

@@ -75,7 +75,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  52
-#define LIBAVUTIL_VERSION_MINOR  55
+#define LIBAVUTIL_VERSION_MINOR  56
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \