When I install lapack-reference it ends up installing a liblapack.so that links to a nonexisting libgfortran.so: ldd /usr/lib/liblapack.so linux-vdso.so.1 (0x00007ffcd1bae000) libblas.so.3 => /usr/lib64/libblas.so.3 (0x00007f79866e5000) libgfortran.so.5 => /usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/libgfortran.so.5 (0x00007f7986472000) libm.so.6 => /lib64/libm.so.6 (0x00007f7986335000) libgcc_s.so.1 => /usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/libgcc_s.so.1 (0x00007f798631b000) libc.so.6 => /lib64/libc.so.6 (0x00007f798614c000) libgfortran.so.4 => not found libquadmath.so.0 => /usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/libquadmath.so.0 (0x00007f7986108000) libz.so.1 => /lib64/libz.so.1 (0x00007f7985ef1000) /lib64/ld-linux-x86-64.so.2 (0x00007f798703f000) Please note it links against both libgfortran.so.4 and libgfortran.so.5, yet the first does not exist.
I suspect libgfortran.so.4 comes from libblas which could have been linked to libgfortran.so.4 before you moved to gcc-8. `ldd -r` is good, but here to check what libraries liblapack is really linked against, I recommend to use readelf -d /usr/lib/liblapack.so
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=74ebcf45ffd328bbb7a7bb659f0be3f94a38cc4f commit 74ebcf45ffd328bbb7a7bb659f0be3f94a38cc4f Author: Aisha Tammy <gentoo@aisha.cc> AuthorDate: 2020-11-15 14:51:37 +0000 Commit: David Seifert <soap@gentoo.org> CommitDate: 2020-11-15 14:51:37 +0000 sci-libs/lapack: remove lapacke-reference blocker * included in sci-libs/lapack Closes: https://bugs.gentoo.org/746962 Closes: https://bugs.gentoo.org/684400 Closes: https://bugs.gentoo.org/667828 Closes: https://bugs.gentoo.org/666627 Closes: https://bugs.gentoo.org/659016 Closes: https://bugs.gentoo.org/689084 Closes: https://bugs.gentoo.org/612038 Closes: https://bugs.gentoo.org/620328 Closes: https://bugs.gentoo.org/608270 Signed-off-by: Aisha Tammy <gentoo@aisha.cc> Signed-off-by: David Seifert <soap@gentoo.org> sci-libs/lapack/lapack-3.8.0-r1.ebuild | 1 - sci-libs/lapack/lapack-3.8.0.ebuild | 1 - sci-libs/lapack/lapack-3.9.0.ebuild | 1 - 3 files changed, 3 deletions(-)
