replace FFMPEG with LIBAV in FFMPEG_CONFIGURATION

also update the multiple inclusion guards in config.h|mak

Makefile

@@ -177,7 +177,7 @@ distclean::
 	$(RM) version.h config.* libavutil/avconfig.h
 
 config:
-	$(SRC_PATH)/configure $(value FFMPEG_CONFIGURATION)
+	$(SRC_PATH)/configure $(value LIBAV_CONFIGURATION)
 
 # regression tests
 

cmdutils.c

@@ -397,7 +397,7 @@ static int warned_cfg = 0;
         }                                                               \
         if (flags & SHOW_CONFIG) {                                      \
             const char *cfg = libname##_configuration();                \
-            if (strcmp(FFMPEG_CONFIGURATION, cfg)) {                    \
+            if (strcmp(LIBAV_CONFIGURATION, cfg)) {                     \
                 if (!warned_cfg) {                                      \
                     fprintf(outstream,                                  \
                             "%sWARNING: library configuration mismatch\n", \
@@ -427,7 +427,7 @@ void show_banner(void)
             program_name, program_birth_year, this_year);
     fprintf(stderr, "  built on %s %s with %s %s\n",
             __DATE__, __TIME__, CC_TYPE, CC_VERSION);
-    fprintf(stderr, "  configuration: " FFMPEG_CONFIGURATION "\n");
+    fprintf(stderr, "  configuration: " LIBAV_CONFIGURATION "\n");
     print_all_libs_info(stderr, INDENT|SHOW_CONFIG);
     print_all_libs_info(stderr, INDENT|SHOW_VERSION);
 }

configure

@@ -1688,7 +1688,7 @@ for v in "$@"; do
     r=${v#*=}
     l=${v%"$r"}
     r=$(sh_quote "$r")
-    FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
+    LIBAV_CONFIGURATION="${LIBAV_CONFIGURATION# } ${l}${r}"
 done
 
 find_things(){
@@ -1800,7 +1800,7 @@ done
 
 disabled logging && logfile=/dev/null
 
-echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
+echo "# $0 $LIBAV_CONFIGURATION" > $logfile
 set >> $logfile
 
 test -n "$cross_prefix" && enable cross_compile
@@ -2495,7 +2495,7 @@ case $target_os in
         ;;
 esac
 
-echo "config:$arch:$subarch:$cpu:$target_os:$cc_ident:$FFMPEG_CONFIGURATION" >config.fate
+echo "config:$arch:$subarch:$cpu:$target_os:$cc_ident:$LIBAV_CONFIGURATION" >config.fate
 
 check_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable pic
 
@@ -3204,9 +3204,9 @@ config_files="$TMPH config.mak"
 
 cat > config.mak <<EOF
 # Automatically generated by configure - do not modify!
-ifndef FFMPEG_CONFIG_MAK
-FFMPEG_CONFIG_MAK=1
-FFMPEG_CONFIGURATION=$FFMPEG_CONFIGURATION
+ifndef LIBAV_CONFIG_MAK
+LIBAV_CONFIG_MAK=1
+LIBAV_CONFIGURATION=$LIBAV_CONFIGURATION
 prefix=$prefix
 LIBDIR=\$(DESTDIR)$libdir
 SHLIBDIR=\$(DESTDIR)$shlibdir
@@ -3295,9 +3295,9 @@ get_version LIBAVFILTER libavfilter/avfilter.h
 
 cat > $TMPH <<EOF
 /* Automatically generated by configure - do not modify! */
-#ifndef FFMPEG_CONFIG_H
-#define FFMPEG_CONFIG_H
-#define FFMPEG_CONFIGURATION "$(c_escape $FFMPEG_CONFIGURATION)"
+#ifndef LIBAV_CONFIG_H
+#define LIBAV_CONFIG_H
+#define LIBAV_CONFIGURATION "$(c_escape $LIBAV_CONFIGURATION)"
 #define FFMPEG_LICENSE "$(c_escape $license)"
 #define FFMPEG_DATADIR "$(eval c_escape $datadir)"
 #define CC_TYPE "$cc_type"
@@ -3349,8 +3349,8 @@ LAVFI_TESTS=$(print_enabled  -n _test $LAVFI_TESTS)
 SEEK_TESTS=$(print_enabled   -n _test $SEEK_TESTS)
 EOF
 
-echo "#endif /* FFMPEG_CONFIG_H */" >> $TMPH
-echo "endif # FFMPEG_CONFIG_MAK" >> config.mak
+echo "#endif /* LIBAV_CONFIG_H */" >> $TMPH
+echo "endif # LIBAV_CONFIG_MAK" >> config.mak
 
 # Do not overwrite an unchanged config.h to avoid superfluous rebuilds.
 cp_if_changed $TMPH config.h

libavcodec/utils.c

@@ -1035,7 +1035,7 @@ unsigned avcodec_version( void )
 
 const char *avcodec_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avcodec_license(void)

libavdevice/avdevice.c

@@ -25,7 +25,7 @@ unsigned avdevice_version(void)
 
 const char * avdevice_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char * avdevice_license(void)

libavfilter/avfilter.c

@@ -34,7 +34,7 @@ unsigned avfilter_version(void) {
 
 const char *avfilter_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avfilter_license(void)

libavformat/utils.c

@@ -51,7 +51,7 @@ unsigned avformat_version(void)
 
 const char *avformat_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avformat_license(void)

libavutil/utils.c

@@ -31,7 +31,7 @@ unsigned avutil_version(void)
 
 const char *avutil_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *avutil_license(void)

libpostproc/postprocess.c

@@ -94,7 +94,7 @@ unsigned postproc_version(void)
 
 const char *postproc_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *postproc_license(void)

libswscale/utils.c

@@ -53,7 +53,7 @@ unsigned swscale_version(void)
 
 const char *swscale_configuration(void)
 {
-    return FFMPEG_CONFIGURATION;
+    return LIBAV_CONFIGURATION;
 }
 
 const char *swscale_license(void)