1168671 - central fails to compile with clang-3.5 and gnu libstdc++ in ubuntu 14.04

Status: RESOLVED WORKSFORME

(Firefox Build System :: General, defect)

Description

[Jean-Yves Avenard [:jya]]

Compilation of mbft/tests/TestAtomics.cpp

fails with:
/usr/bin/../lib/gcc/i686-linux-gnu/4.8/../../../../include/c++/4.8/bits/atomic_base.h:496: undefined reference to `__atomic_load_8'
 0:18.07 clang: error: linker command failed with exit code 1 (use -v to see invocation)

This seems related to the problem describe here:
https://llvm.org/bugs/show_bug.cgi?id=23262

my .mozconfig contains:
CC=/usr/bin/clang-3.5
CXX=/usr/bin/clang++-3.5
LLVMCONFIG=/usr/bin/llvm-config-3.5

Comment 1

[Jean-Yves Avenard [:jya]]

it appears my linux VM is 32 bits, and using mozilla::Atomic<T> where sizeof(T) is 8 fails (e.g. with uin64_t and int64_t)

seeing that building on 32 bits platform isn't supported anymore, feel free to close this bug as invalid

Comment 2

[:Gijs (he/him)]

(In reply to Jean-Yves Avenard [:jya] from comment #1)
> it appears my linux VM is 32 bits, and using mozilla::Atomic<T> where
> sizeof(T) is 8 fails (e.g. with uin64_t and int64_t)
> 
> seeing that building on 32 bits platform isn't supported anymore, feel free
> to close this bug as invalid

Don't we still build 32-bit linux and Windows on infra, and don't most Windows folks build 32-bit as well? I'm confused... Also, if it's not supported, shouldn't ./configure error out instead of the build just breaking halfway through?

Anyway, also 8 months old, any idea if this is still happening? I'm kinda assuming you reimaged the VM and moved on...