Hi mentors, I'm wondering if there is any shared object trick that allows me to create some "stub" shared object that reuses all symbols from another shared object, but has different SONAME compared to the original one.
Background: * We have a shared object named libopenblas.so.0, with SONAME being libopenblas.so.0 * This shared object provides compatible API and ABI to libblas.so.3, and libopenblas.so.0 can be registered as a libblas.so.3 alternative through update-alternatives. * If a program links against libblas.so.3 (which points to libopenblas.so.0), dpkg-shlibdeps makes the program depend on openblas. * As a workaround, openblas compiled a new openblas/libblas.so.3 shared object (= blas object files, and linked against libopenblas.so.0), with SONAME being libblas.so.3 . This shared object is the real libblas.so.3 (alternative) provider. Some eligible solutions could be: 1. duplicate the original shared object and patchelf 2. patch upstream build system to build libblas.so.3 to save space, as done by . 3. [not sure] maybe we can simply create some "stub" shared object that reuses all symbols from another shared object, but has different SONAME compared to the original one. I'm thinking of "3." because: $ readelf -sW /usr/lib/x86_64-linux-gnu/openblas/libblas.so.3 ... 1091: 0000000000000000 0 FUNC GLOBAL DEFAULT UND ctrmm_LCUN <- comes from another .so 1092: 0000000000000000 0 FUNC GLOBAL DEFAULT UND strmv_NUU 1093: 000000000001ec80 701 FUNC GLOBAL DEFAULT 12 ssymv_ ... $ readelf -sW /usr/lib/x86_64-linux-gnu/libopenblas.so.0 | grep ctrmm_LCUN 7379: 0000000000214ea0 1658 FUNC GLOBAL DEFAULT 12 ctrmm_LCUN <- the real implemtantion So maybe it's possible to create some stub library "stub.so", which looks like: $ <magic/trick> --output=stub.so $ readelf -d stub.so NEEDED libopenblas.so.0 SONAME libblas.so.3 $ readelf -sW stub.so 0000000000000000 ... All BLAS (fortran) ABI 0000000000000000 ... All CBLAS ABI Is there such "magic/trick"? Thanks in advance.  https://salsa.debian.org/science-team/openblas/blob/master/debian/patches/shared-blas-lapack.patch