From a9785f58c670bf5bbd2d8700437f4f36c641fa88 Mon Sep 17 00:00:00 2001
From: Reinhard Tartler <siretart@tauware.de>
Date: Mon, 1 Feb 2010 16:00:09 +0000
Subject: backport symbol versioning patch

Originally committed as revision 21595 to svn://svn.ffmpeg.org/ffmpeg/branches/0.5
---
 common.mak                |  6 +++++-
 configure                 | 16 +++++++++++++---
 libavcodec/libavcodec.v   |  3 +++
 libavdevice/libavdevice.v |  4 ++++
 libavfilter/libavfilter.v |  4 ++++
 libavformat/libavformat.v |  3 +++
 libavutil/libavutil.v     |  4 ++++
 libpostproc/libpostproc.v |  4 ++++
 libswscale/libswscale.v   |  3 +++
 subdir.mak                |  2 +-
 10 files changed, 44 insertions(+), 5 deletions(-)
 create mode 100644 libavcodec/libavcodec.v
 create mode 100644 libavdevice/libavdevice.v
 create mode 100644 libavfilter/libavfilter.v
 create mode 100644 libavformat/libavformat.v
 create mode 100644 libavutil/libavutil.v
 create mode 100644 libpostproc/libpostproc.v
 create mode 100644 libswscale/libswscale.v

diff --git a/common.mak b/common.mak
index 4be056c876..a98ccd75e2 100644
--- a/common.mak
+++ b/common.mak
@@ -9,6 +9,7 @@ vpath %.c $(SRC_DIR)
 vpath %.h $(SRC_DIR)
 vpath %.S $(SRC_DIR)
 vpath %.asm $(SRC_DIR)
+vpath %.v   $(SRC_DIR)
 
 ifeq ($(SRC_DIR),$(SRC_PATH_BARE))
 BUILD_ROOT_REL = .
@@ -43,6 +44,9 @@ CFLAGS := -DHAVE_AV_CONFIG_H -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE \
 
 %$(EXESUF): %.c
 
+%.ver: %.v
+	sed 's/$$MAJOR/$($(basename $(@F))_VERSION_MAJOR)/' $^ > $@
+
 SVN_ENTRIES = $(SRC_PATH_BARE)/.svn/entries
 ifeq ($(wildcard $(SVN_ENTRIES)),$(SVN_ENTRIES))
 $(BUILD_ROOT_REL)/version.h: $(SVN_ENTRIES)
@@ -77,7 +81,7 @@ checkheaders: $(filter-out %_template.ho,$(ALLHEADERS:.h=.ho))
 DEPS := $(OBJS:.o=.d)
 depend dep: $(DEPS)
 
-CLEANSUFFIXES = *.o *~ *.ho
+CLEANSUFFIXES = *.o *~ *.ho *.ver
 LIBSUFFIXES   = *.a *.lib *.so *.so.* *.dylib *.dll *.def *.dll.a *.exp *.map
 DISTCLEANSUFFIXES = *.d *.pc
 
diff --git a/configure b/configure
index fd11501e22..229b84d21f 100755
--- a/configure
+++ b/configure
@@ -566,13 +566,18 @@ int x;
 EOF
 }
 
-check_ldflags(){
-    log check_ldflags "$@"
-    check_ld "$@" <<EOF && add_ldflags "$@"
+test_ldflags(){
+    log test_ldflags "$@"
+    check_ld "$@" <<EOF
 int main(void){ return 0; }
 EOF
 }
 
+check_ldflags(){
+    log check_ldflags "$@"
+    test_ldflags "$@" && add_ldflags "$@"
+}
+
 check_header(){
     log check_header "$@"
     header=$1
@@ -1356,6 +1361,7 @@ TMPE="${TMPDIR}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}${EXESUF}"
 TMPH="${TMPDIR}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.h"
 TMPO="${TMPDIR}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.o"
 TMPS="${TMPDIR}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.S"
+TMPV="${TMPDIR}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.ver"
 TMPSH="${TMPDIR}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.sh"
 
 # make sure we can execute files in $TMPDIR
@@ -2160,6 +2166,10 @@ check_ldflags -Wl,--as-needed
 check_ldflags '-Wl,-rpath-link,\$(BUILD_ROOT)/libpostproc -Wl,-rpath-link,\$(BUILD_ROOT)/libswscale -Wl,-rpath-link,\$(BUILD_ROOT)/libavfilter -Wl,-rpath-link,\$(BUILD_ROOT)/libavdevice -Wl,-rpath-link,\$(BUILD_ROOT)/libavformat -Wl,-rpath-link,\$(BUILD_ROOT)/libavcodec -Wl,-rpath-link,\$(BUILD_ROOT)/libavutil'
 check_ldflags -Wl,-Bsymbolic
 
+echo "X{};" > $TMPV
+test_ldflags -Wl,--version-script,$TMPV &&
+    append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
+
 if enabled small; then
     check_cflags -Os            # not all compilers support -Os
     optimizations="small"
diff --git a/libavcodec/libavcodec.v b/libavcodec/libavcodec.v
new file mode 100644
index 0000000000..561a42cd4f
--- /dev/null
+++ b/libavcodec/libavcodec.v
@@ -0,0 +1,3 @@
+LIBAVCODEC_$MAJOR {
+        global: *;
+};
diff --git a/libavdevice/libavdevice.v b/libavdevice/libavdevice.v
new file mode 100644
index 0000000000..663af85ba8
--- /dev/null
+++ b/libavdevice/libavdevice.v
@@ -0,0 +1,4 @@
+LIBAVDEVICE_$MAJOR {
+        global: avdevice_*;
+        local: *;
+};
diff --git a/libavfilter/libavfilter.v b/libavfilter/libavfilter.v
new file mode 100644
index 0000000000..83e8887080
--- /dev/null
+++ b/libavfilter/libavfilter.v
@@ -0,0 +1,4 @@
+LIBAVFILTER_$MAJOR {
+        global: avfilter_*; av_*;
+        local: *;
+};
diff --git a/libavformat/libavformat.v b/libavformat/libavformat.v
new file mode 100644
index 0000000000..da2311eb36
--- /dev/null
+++ b/libavformat/libavformat.v
@@ -0,0 +1,3 @@
+LIBAVFORMAT_$MAJOR {
+        global: *;
+};
diff --git a/libavutil/libavutil.v b/libavutil/libavutil.v
new file mode 100644
index 0000000000..ec52f2be7a
--- /dev/null
+++ b/libavutil/libavutil.v
@@ -0,0 +1,4 @@
+LIBAVUTIL_$MAJOR {
+        global: av_*; ff_*; avutil_*;
+        local: *;
+};
diff --git a/libpostproc/libpostproc.v b/libpostproc/libpostproc.v
new file mode 100644
index 0000000000..e65d76f4f6
--- /dev/null
+++ b/libpostproc/libpostproc.v
@@ -0,0 +1,4 @@
+LIBPOSTPROC_$MAJOR {
+        global: postproc_*; pp_*;
+        local: *;
+};
diff --git a/libswscale/libswscale.v b/libswscale/libswscale.v
new file mode 100644
index 0000000000..d6bd39a8c5
--- /dev/null
+++ b/libswscale/libswscale.v
@@ -0,0 +1,3 @@
+LIBSWSCALE_%MAJOR% {
+        global: *;
+};
diff --git a/subdir.mak b/subdir.mak
index df5bb8a09a..4749d4efd6 100644
--- a/subdir.mak
+++ b/subdir.mak
@@ -27,7 +27,7 @@ install-libs: install-lib$(NAME)-shared
 $(SUBDIR)$(SLIBNAME): $(SUBDIR)$(SLIBNAME_WITH_MAJOR)
 	cd ./$(SUBDIR) && $(LN_S) $(SLIBNAME_WITH_MAJOR) $(SLIBNAME)
 
-$(SUBDIR)$(SLIBNAME_WITH_MAJOR): $(OBJS)
+$(SUBDIR)$(SLIBNAME_WITH_MAJOR): $(OBJS) $(SUBDIR)lib$(NAME).ver
 	$(SLIB_CREATE_DEF_CMD)
 	$(CC) $(SHFLAGS) $(FFLDFLAGS) -o $$@ $$(filter-out $(DEP_LIBS),$$^) $(FFEXTRALIBS) $(EXTRAOBJS)
 	$(SLIB_EXTRA_CMD)
-- 
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