Instrumenting function calls in xine-lib breaks linker

Hello,

I didn't get an answer to the following question on xine-user, so I'll
try my luck here. I'm sorry if you have already seen this...

I'm trying to trace function calls in xine-lib-1.2 by specifying the GCC
option -finstrument-functions and using a small library that implements
the __cyg_profile_func_* functions. Unfortenately, I can't manage to
link xine-lib with this compiler option.

First, I added the following configuration option to configure.ac:

AC_ARG_ENABLE([tracing],
              [AS_HELP_STRING([--enable-tracing],
              [build with instrumentation for tracing])],
              [], [enable_tracing="no"])
if test x"$enable_tracing" != x"no"; then
    #CFLAGS="-finstrument-functions $CFLAGS"
    CPPFLAGS="-DXINE_INSTRUMENT_FUNCTIONS $CPPFLAGS"
    #OBJCFLAGS="-finstrument-functions $OBJCFLAGS"
fi
AM_CONDITIONAL([TRACING_BUILD], [test x"$enable_tracing" != x"no"])

But when I specified --enable-tracing, I got a linker error:

...
  CCLD   libxine-interface.la
libtool: link: warning: `-version-info/-version-number' is ignored for
convenience libraries
  CCLD   libxine.la
/usr/bin/ld: .libs/libxine_la-xine.o: relocation R_386_GOTOFF against
protected function `_x_reset_relaxed_frame_drop_mode' can not be used
when making a shared object
/usr/bin/ld: final link failed: Bad value
collect2: ld returned 1 exit status
make[3]: *** [libxine.la] Error 1
make[3]: Leaving directory `/tmp/buildd/xine-lib-1.2-1.2.2/src/xine-engine'
make[2]: *** [../src/xine-engine/libxine.la] Error 2
make[2]: Leaving directory `/tmp/buildd/xine-lib-1.2-1.2.2/misc'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/buildd/xine-lib-1.2-1.2.2'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
E: Failed autobuilding of package

I then tried to disable the function attribute "protected" by modifying
include/xine/attribute.h (line breaks added for this message):

 /* Export protected only for libxine functions */
#if defined(XINE_LIBRARY_COMPILE) \
    && defined(SUPPORT_ATTRIBUTE_VISIBILITY_PROTECTED) \
    && !defined(XINE_INSTRUMENT_FUNCTIONS)
# define XINE_PROTECTED __attribute__((__visibility__("protected")))
#elif defined(XINE_LIBRARY_COMPILE) \
      && defined(SUPPORT_ATTRIBUTE_VISIBILITY_DEFAULT)
# define XINE_PROTECTED __attribute__((__visibility__("default")))
#else
# define XINE_PROTECTED
#endif

But this broke linking, too:

...
  CCLD   libxine.la
make[3]: Leaving directory `/tmp/buildd/xine-lib-1.2-1.2.2/src/xine-engine'
  CCLD   xine-list-1.2
xine-list.o: In function `main':
/tmp/buildd/xine-lib-1.2-1.2.2/misc/xine-list.c:109: undefined reference
to `xine_new'
/tmp/buildd/xine-lib-1.2-1.2.2/misc/xine-list.c:113: undefined reference
to `xine_get_version'
/tmp/buildd/xine-lib-1.2-1.2.2/misc/xine-list.c:120: undefined reference
to `xine_init'
/tmp/buildd/xine-lib-1.2-1.2.2/misc/xine-list.c:128: undefined reference
to `xine_get_mime_types'
/tmp/buildd/xine-lib-1.2-1.2.2/misc/xine-list.c:79: undefined reference
to `xine_get_version_string'
/tmp/buildd/xine-lib-1.2-1.2.2/misc/xine-list.c:91: undefined reference
to `xine_get_version_string'
/tmp/buildd/xine-lib-1.2-1.2.2/misc/xine-list.c:145: undefined reference
to `xine_get_file_extensions'
collect2: ld returned 1 exit status
make[2]: *** [xine-list-1.2] Error 1
make[2]: Leaving directory `/tmp/buildd/xine-lib-1.2-1.2.2/misc'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/buildd/xine-lib-1.2-1.2.2'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
E: Failed autobuilding of package

Environment: Debian Squeeze, GCC 4.4.5, libc 2.11.3.

Any advice?

Thanks in advance,
Malte


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