compiler-rt: relocatable linking with relocations from format elf64-x86-64 to format elf32-i386 (fuzzer.o) is not supported

[llvmbot]

Bugzilla Link	43677
Version	9.0
OS	Linux
Blocks	#43541
Reporter	LLVM Bugzilla Contributor
CC	@devincoughlin,@LebedevRI,@zygoloid,@sylvestre

Extended Description

Hi,

We are using RHEL7 machine to build llvm - 9.0.0.

we are using option to enable both 32 and 64 bit library.
please find below command which we are using to build llvm:

---

cmake -DCMAKE_INSTALL_PREFIX=%{_prefix} -DCMAKE_BUILD_WITH_INSTALL_RPATH=1
-DCMAKE_C_COMPILER=/opt/gcc/x86_64/9.2.0a/bin/gcc
-DCMAKE_CXX_COMPILER=/opt/gcc/x86_64/9.2.0a/bin/g++
-DGCC_INSTALL_PREFIX=/opt/gcc/x86_64/9.2.0a/
-DCMAKE_CXX_LINK_FLAGS="-L/opt/gcc/x86_64/9.2.0a/lib"
-DCMAKE_INSTALL_RPATH=$ORIGIN/../lib:%{gccpath}/lib
-DCMAKE_CROSSCOMPILING=True -DCMAKE_BUILD_TYPE=Release
-Wno-dev --enable-zlib -DCMAKE_BUILD_TYPE=Release
--enable-gold --enable-plugins
-DLLVM_TARGETS_TO_BUILD="X86"
--with-termlib
-DLLVM_ENABLE_ZLIB:BOOL=ON ..

make

make install

And the gcc version we are using is,

---

[root@abinaya-test rpmbuild]$ gcc --version
gcc (GCC) 9.2.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Facing below build issue:

[ 33%] Linking CXX static library ../../../../lib/clang/9.0.0/lib/linux/libclang_rt.fuzzer-i386.a
/opt/binutils/x86_64/2.32/bin/ld: relocatable linking with relocations from format elf64-x86-64 (/root/rpmbuild/BUILD/llvm-9.0.0.src/build/projects/compiler-rt/lib/fuzzer/libcxx_fuzzer_i386/lib/libc++.a(algorithm.cpp.o)) to format elf32-i386 (fuzzer.o) is not supported
make[2]: *** [lib/clang/9.0.0/lib/linux/libclang_rt.fuzzer-i386.a] Error 1
make[2]: *** Deleting file `lib/clang/9.0.0/lib/linux/libclang_rt.fuzzer-i386.a'
make[1]: *** [projects/compiler-rt/lib/fuzzer/CMakeFiles/clang_rt.fuzzer-i386.dir/all] Error 2
make: *** [all] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.8Bs8vE (%build)

Please anyone help us here, we have been investigate lot and couldn't get any idea about this issue.

Regards,
Abinaya

[llvmbot]

We are using below binutils version:

[root@abinaya-test rpmbuild]$ ld --version
GNU ld (GNU Binutils) 2.32
Copyright (C) 2019 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
[root@abinaya-test rpmbuild]$

[sylvestre]

Interesting, I have been just experienced that with Debian
https://buildd.debian.org/status/fetch.php?pkg=llvm-toolchain-9&arch=i386&ver=1%3A9.0.0-1&stamp=1571581925&raw=0

The previous build was fine:
https://buildd.debian.org/status/fetch.php?pkg=llvm-toolchain-9&arch=i386&ver=1%3A9-3&stamp=1571284337&raw=0

The big change between the two versions is that I am now using the github repo and compiler-rt in PROJECTS.

[llvmbot]

can we get any idea about below issue:

[ 82%] Building CXX object tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningWorker.cpp.o
c++: error: /root/rpmbuild/BUILD/llvm-9.0.0.src/tools/clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp: No such file or directory
c++: fatal error: no input files
compilation terminated.
make[2]: *** [tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/DependencyScanningWorker.cpp.o] Error 1
make[1]: *** [tools/clang/lib/Tooling/DependencyScanning/CMakeFiles/obj.clangDependencyScanning.dir/all] Error 2
make: *** [all] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.xjQxot (%install)

[sylvestre]

Seems to be an unrelated issue here

[llvmbot]

Issue we have been facing is while the build process of llvm - 9.0.0 from source code.

Os: RHEL7

[sylvestre]

yeah but please keep this bug open for this issue:

/opt/binutils/x86_64/2.32/bin/ld: relocatable linking with relocations from format elf64-x86-64 (/root/rpmbuild/BUILD/llvm-9.0.0.src/build/projects/compiler-rt/lib/fuzzer/libcxx_fuzzer_i386/lib/libc++.a(algorithm.cpp.o)) to format elf32-i386 (fuzzer.o) is not supported

If you are facing a different problem, you should open a new bug

[llvmbot]

Ok Thanks and will open new bug.

[sylvestre]

So, the difference is caused by the fact that, using github project instead of svn, it proposes x86_64 as supported arch.
-- Compiler-RT supported architectures: x86_64;i386
[...]
-- Builtin supported architectures: i386;x86_64

With svn:
-- Compiler-RT supported architectures: i386
[...]
-- Builtin supported architectures: i386

[sylvestre]

Forget my last comment, it is a difference between stage 1 & 2

[sylvestre]

Maybe it is the same as llvm/llvm-bugzilla-archive#43722

[LebedevRI]

mentioned in issue #43541

[sylvestre]

mentioned in issue llvm/llvm-bugzilla-archive#44930