Bug#942864: llvm-toolchain-9: FTBFS on i386: tries to ld -r amd64 code

[Thorsten Glaser]

Source: llvm-toolchain-9
Version: 1:9.0.0-1
Severity: serious
Justification: FTBFS on release arch, built before
Tags: ftbfs

https://buildd.debian.org/status/fetch.php?pkg=llvm-toolchain-9&arch=i386&ver=1%3A9.0.0-1&stamp=1571581925&raw=0

Disentangling the parallel build, we get:

[…]
cd /<<PKGBUILDDIR>>/build-llvm/tools/clang/stage2-bins/projects/compiler-rt/lib/fuzzer/cxx_x86_64_merge.dir && /usr/bin/ld --whole-archive /<<PKGBUILDDIR>>/build-llvm/tools/clang/stage2-bins/lib/clang/9.0.0/lib/linux/libclang_rt.fuzzer-x86_64.a --no-whole-archive /<<PKGBUILDDIR>>/build-llvm/tools/clang/stage2-bins/projects/compiler-rt/lib/fuzzer/libcxx_fuzzer_x86_64/lib/libc++.a -r -o fuzzer.o
/usr/bin/ld: relocatable linking with relocations from format elf64-x86-64 (/<<PKGBUILDDIR>>/build-llvm/tools/clang/stage2-bins/lib/clang/9.0.0/lib/linux/libclang_rt.fuzzer-x86_64.a(FuzzerCrossOver.cpp.o)) to format elf32-i386 (fuzzer.o) is not supported
make[8]: *** [projects/compiler-rt/lib/fuzzer/CMakeFiles/clang_rt.fuzzer-x86_64.dir/build.make:120: lib/clang/9.0.0/lib/linux/libclang_rt.fuzzer-x86_64.a] Error 1

Basically, it’s trying to create one single fuzzer.o relocatable object file
from the contents of the amd64 library but uses ld -r without -m64.

bye,
//mirabilos
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