Package: clang-6.0
Version: 1:6.0.1-2
Severity: important
Dear Maintainer,
First, I'm not really sure clang is at fault here since this issue requires a
specific combination involving the clang++ compiler, the gold linker and the
sanitizers options.
Basically, with a specific combination of these tools the link step produces a
warning, which may result in a link error if '-Wl,--fatal-warnings' is used.
$ cat main.cpp
int main(){ return 0; }
$ /usr/bin/clang++-6.0 -o main.o -c main.cpp -fsanitize=address
$ /usr/bin/clang++-6.0 -o main main.o -fsanitize=address -fuse-ld=gold
/usr/bin/ld.gold: warning: discarding version information for
__libc_stack_end@GLIBC_2.2.5, defined in unused shared library
/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 (linked with --as-needed)
* Using clang-6.0 (as a C compiler) or clang++-7 (1:7~svn331965-1) does not
solve the issue
* Using g++-8 instead of clang++-6.0 works fine
* Using '-fuse-ld=bfd', '-fuse-ld=lld' or no flags (bfd default) works fine
* Using another ('undefined', 'thread' or 'memory') sanitizer is also broken
while no sanitizers works fine
Sylvain
-- System Information:
Debian Release: buster/sid
APT prefers testing
APT policy: (990, 'testing'), (800, 'stable-updates'), (800, 'stable'), (700,
'unstable'), (90, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 4.16.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE=
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages clang-6.0 depends on:
ii binutils 2.31.1-1
ii libc6 2.27-5
ii libc6-dev 2.27-5
ii libclang-common-6.0-dev 1:6.0.1-2
ii libclang1-6.0 1:6.0.1-2
ii libgcc-7-dev 7.3.0-25
ii libgcc1 1:8.1.0-10
ii libjsoncpp1 1.7.4-3
ii libllvm6.0 1:6.0.1-2
ii libobjc-7-dev 7.3.0-25
ii libstdc++-7-dev 7.3.0-25
ii libstdc++6 8.1.0-10
Versions of packages clang-6.0 recommends:
ii libomp-dev 6.0.1-1
ii llvm-6.0-dev 1:6.0.1-2
ii python 2.7.15-3
Versions of packages clang-6.0 suggests:
pn clang-6.0-doc <none>
pn gnustep <none>
pn gnustep-devel <none>
-- no debconf information
