Hi, well actually one of the problems i normaly have in portage and about develop in gentoo its some libraries have "undefined symbols" (ldd -r "some lib or exe"), its posible add a test in portage to recognize it?
undefined symbols are not a problem by themselves, so it's hard to differentiate between "bad" undefined and expected ones.
I really need more context for what you are trying to do. With that said ldd -r reports two different errors. 1. Symbol %s not defined 2. Undefined symbol: %s The first one is normally a problem that can be fixed by recompiling the affected software The second one tends to be a false positives and are typically not a problem The revdep-rebuild.sh script in gentoolkit-0.3.1 does detect and act upon the first message. However, this functionality is not in the python version yet which is the default revdep-rebuild that is installed. So you need to call revdep-rebuild.sh explicitly.
i think an example can do a context, compile tesseract with opencl use flag, now ldd -r ldd -r /usr/lib64/libtesseract.so linux-vdso.so.1 (0x00007ffcf73ce000) liblept.so.4 => /usr/lib64/liblept.so.4 (0x00007fa17fb1f000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fa17f903000) libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libstdc++.so.6 (0x00007fa17f5f2000) libm.so.6 => /lib64/libm.so.6 (0x00007fa17f2f6000) libc.so.6 => /lib64/libc.so.6 (0x00007fa17ef5b000) libgcc_s.so.1 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libgcc_s.so.1 (0x00007fa17ed43000) libz.so.1 => /lib64/libz.so.1 (0x00007fa17eb2d000) libpng16.so.16 => /usr/lib64/libpng16.so.16 (0x00007fa17e8f8000) libjpeg.so.62 => /usr/lib64/libjpeg.so.62 (0x00007fa17e69e000) libgif.so.4 => /usr/lib64/libgif.so.4 (0x00007fa17e494000) libtiff.so.5 => /usr/lib64/libtiff.so.5 (0x00007fa17e220000) libwebp.so.5 => /usr/lib64/libwebp.so.5 (0x00007fa17dfc4000) /lib64/ld-linux-x86-64.so.2 (0x0000563feab0a000) libX11.so.6 => /usr/lib64/libX11.so.6 (0x00007fa17dc82000) libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x00007fa17da5e000) libdl.so.2 => /lib64/libdl.so.2 (0x00007fa17d85a000) libXau.so.6 => /usr/lib64/libXau.so.6 (0x00007fa17d656000) libXdmcp.so.6 => /usr/lib64/libXdmcp.so.6 (0x00007fa17d44f000) libbsd.so.0 => /usr/lib64/libbsd.so.0 (0x00007fa17d239000) undefined symbol: clBuildProgram (/usr/lib64/libtesseract.so) undefined symbol: clEnqueueNDRangeKernel (/usr/lib64/libtesseract.so) undefined symbol: clSetKernelArg (/usr/lib64/libtesseract.so) undefined symbol: clReleaseMemObject (/usr/lib64/libtesseract.so) undefined symbol: clFinish (/usr/lib64/libtesseract.so) undefined symbol: clEnqueueUnmapMemObject (/usr/lib64/libtesseract.so) undefined symbol: clCreateContextFromType (/usr/lib64/libtesseract.so) undefined symbol: clGetCommandQueueInfo (/usr/lib64/libtesseract.so) undefined symbol: clReleaseContext (/usr/lib64/libtesseract.so) undefined symbol: clEnqueueCopyBuffer (/usr/lib64/libtesseract.so) undefined symbol: clGetProgramBuildInfo (/usr/lib64/libtesseract.so) undefined symbol: clCreateContext (/usr/lib64/libtesseract.so) undefined symbol: clEnqueueMapBuffer (/usr/lib64/libtesseract.so) undefined symbol: clGetDeviceIDs (/usr/lib64/libtesseract.so) undefined symbol: clGetContextInfo (/usr/lib64/libtesseract.so) undefined symbol: clGetDeviceInfo (/usr/lib64/libtesseract.so) undefined symbol: clReleaseCommandQueue (/usr/lib64/libtesseract.so) undefined symbol: clGetPlatformIDs (/usr/lib64/libtesseract.so) undefined symbol: clGetPlatformInfo (/usr/lib64/libtesseract.so) undefined symbol: clCreateProgramWithBinary (/usr/lib64/libtesseract.so) undefined symbol: clCreateCommandQueue (/usr/lib64/libtesseract.so) undefined symbol: clReleaseProgram (/usr/lib64/libtesseract.so) undefined symbol: clGetProgramInfo (/usr/lib64/libtesseract.so) undefined symbol: clCreateKernel (/usr/lib64/libtesseract.so) undefined symbol: clCreateBuffer (/usr/lib64/libtesseract.so) undefined symbol: clCreateProgramWithSource (/usr/lib64/libtesseract.so) now when you try compile some app with tesseract will fail.
other example: ldd -r /usr/lib64/python2.7/site-packages/libtorrent.so linux-vdso.so.1 (0x00007ffddd54f000) libtorrent-rasterbar.so.8 => /usr/lib64/libtorrent-rasterbar.so.8 (0x00007fc97a931000) libboost_system.so.1.57.0 => /usr/lib64/libboost_system.so.1.57.0 (0x00007fc97a72c000) libboost_python-3.4.so.1.57.0 => /usr/lib64/libboost_python-3.4.so.1.57.0 (0x00007fc97a4dc000) libpython2.7.so.1.0 => /usr/lib64/libpython2.7.so.1.0 (0x00007fc97a10d000) libstdc++.so.6 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libstdc++.so.6 (0x00007fc979dfc000) libgcc_s.so.1 => /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/libgcc_s.so.1 (0x00007fc979be5000) libc.so.6 => /lib64/libc.so.6 (0x00007fc97984a000) libssl.so.1.0.0 => /usr/lib64/libssl.so.1.0.0 (0x00007fc9795d3000) libcrypto.so.1.0.0 => /usr/lib64/libcrypto.so.1.0.0 (0x00007fc979192000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fc978f76000) /lib64/ld-linux-x86-64.so.2 (0x00005653e242a000) librt.so.1 => /lib64/librt.so.1 (0x00007fc978d6d000) libutil.so.1 => /lib64/libutil.so.1 (0x00007fc978b6a000) libpython3.4.so.1.0 => /usr/lib64/libpython3.4.so.1.0 (0x00007fc9786d5000) libdl.so.2 => /lib64/libdl.so.2 (0x00007fc9784d0000) libm.so.6 => /lib64/libm.so.6 (0x00007fc9781d4000) libz.so.1 => /lib64/libz.so.1 (0x00007fc977fbd000) undefined symbol: _ZN5boost6python6detail11init_moduleEPKcPFvvE (/usr/lib64/python2.7/site-packages/libtorrent.so) now all apps with libtorrent.so of dpend will fail to execute
Use revdep-rebuild.sh -u to detect these potential problems on your system. There are way to many false positives on a good system to make this a default check though. revdep-rebuild.sh will not go away until the new python version has all of the functionality.
