commit: 07433fc7688d7b49c29440b995719210bb441d22 Author: Alexei Colin <acolin <AT> isi <DOT> edu> AuthorDate: Fri Jan 22 05:01:50 2021 +0000 Commit: Guilherme Amadio <amadio <AT> gentoo <DOT> org> CommitDate: Mon Jun 7 15:22:22 2021 +0000 URL: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=07433fc7
profiles: prefixify dynamic linker for ppc64 Bug: https://bugs.gentoo.org/755551 The issue: prefix stage3 fails because the binaries built by the stage3 GCC toolchain fail to run, because they refer to the host's dynamic linker: $ which gawk /myprefix/usr/bin/gawk $ gawk --version gawk: /lib64/libm.so.6: version `GLIBC_2.29' not found (required by gawk) $ readelf -l $(which gawk) | grep -i 'program [Requesting program interpreter: /lib64/ld64.so.2] The cause is that the toolchain doesn't insert a prefixified path into the binary because the default -dynamic-linker is not prefixified: $ which powerpc64le-unknown-linux-gnu-gcc /myprefix/usr/bin/powerpc64le-unknown-linux-gnu-gcc $ echo 'int main() { return 0; }' > test.c $ powerpc64le-unknown-linux-gnu-gcc -v -o test test.c COLLECT_GCC_OPTIONS='-v' '-o' 'testx' /myprefix/usr/libexec/gcc/powerpc64le-unknown-linux-gnu/10.2.0/collect2 --eh-frame-hdr -V -m elf64lppc -dynamic-linker /libb64/ld64.so.2 ... The root cause: Prefixifying is done by patching the GCC source code with a sed expression in profile.bashrc. The pattern in that sed expression doesn't match the source file for ppc64 (aka. rs6000). The ppc64 file differs from the rest in that it has a macro for the prefix. Notes on fix: I opted to special-case another sed expression to set that unique DYNAMIC_LINKER_PREFIX macro rather than attempt to make a single sed expression that would modify the *_DYNAMIC_LINKER macros in ppc64. Rationale is that if someone happens to look at the patched source file, it would make more sense if the DYNAMIC_LINKER_PREFIX is set to our prefix, instead of if that macro is set to empty but the *_DYNAMIC_LINKER macros have effectively two prefixes, one hardcoded added by sed, one from the DYNAMIC_LINKER_PREFIX macro. Signed-off-by: Alexei Colin <ac <AT> alexeicolin.com> Signed-off-by: Guilherme Amadio <amadio <AT> gentoo.org> profiles/features/prefix/standalone/profile.bashrc | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/profiles/features/prefix/standalone/profile.bashrc b/profiles/features/prefix/standalone/profile.bashrc index ff58c68a562..76ef2455b35 100644 --- a/profiles/features/prefix/standalone/profile.bashrc +++ b/profiles/features/prefix/standalone/profile.bashrc @@ -14,7 +14,11 @@ if [[ ${CATEGORY}/${PN} == sys-devel/gcc && ${EBUILD_PHASE} == configure ]]; the einfo "Prefixifying dynamic linkers..." for h in gcc/config/*/*linux*.h; do ebegin " Updating $h" - sed -i -r "/_DYNAMIC_LINKER/s,([\":])(/lib),\1${EPREFIX}\2,g" $h + if [[ "${h}" == gcc/config/rs6000/linux*.h ]]; then + sed -i -r "s,(DYNAMIC_LINKER_PREFIX\s+)\"\",\1\"${EPREFIX}\",g" $h + else + sed -i -r "/_DYNAMIC_LINKER/s,([\":])(/lib),\1${EPREFIX}\2,g" $h + fi eend $? done
