gcc linker error: version node not found for symbol

Question

I'm trying to build a shared library, and I get the following error:

libavformat.so: version node not found for symbol av_dup_packet@LIBAVFORMAT_52

ld: failed to set dynamic section sizes: Bad value

Does anybody knows what this error means? Host is i586-linux target is arm-linux

Edit: Resolved, see comments

Answer 1

It was caused by an inline assembly directive .symver . My solution was to manually modify the generated config.h to disable version nodes symbols.

Check out internal.h lines 214-223

Answer 2

I ran into this error when building libsctp into a custom build environment.

Symbol Versioning is explained here and a linker script may be used to control it. In my case I was able to pull in the existing version linker script by adding to the target-specific LDFLAGS makefile variable:

$(LIB_PATH)/libsctp.so: LDFLAGS += \
    -Xlinker --version-script=$(MODULE_PATH)/src/lib/Versions.map

Answer 3

Oh, the function was moved in April 2009 from libavformat/util.c to a new file in libavcodec/avpacket.c . The comment in internal.h states explicitly:

If a function is moved from one library to another, a wrapper must be retained in the original location to preserve binary compatibility.

But it is impossible to retain binary compatibility when a function is moved between libraries.

Note that this bug was reported in Chromium project more than a year ago.

By the way, there is no need to edit config.h manually: you can run ./configure --disable-symver .

Answer 4

It took someone else to point this out to me, so I thought I might as well put it on here so others like me can understand ognian's answer:

This translates to editing config.h after you run ./configure and making the SYMVER -related entries are set to 0. Like so:

#define HAVE_SYMVER 0
#define HAVE_SYMVER_GNU_ASM 0
#define HAVE_SYMVER_ASM_LABEL 0