[Bug c++/52929] use of undeclared identifier '__ATOMIC_ACQ_REL'

[os at xeviox dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52929

--- Comment #4 from Ben <os at xeviox dot com> 2012-04-11 15:18:16 UTC ---
System: Archlinux x64 / XFCE
IDE: QtCreator 2.4
Buildsystem: qmake
Used libraries: qt 4.6.x
Language: C++

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/src/gcc-4.7-20120407/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch
--enable-libstdcxx-time --enable-gnu-unique-object --enable-linker-build-id
--with-ppl --enable-cloog-backend=isl --enable-lto --enable-gold
--enable-ld=default --enable-plugin --with-plugin-ld=ld.gold
--with-linker-hash-style=gnu --disable-multilib --disable-libssp
--disable-build-with-cxx --disable-build-poststage1-with-cxx
--enable-checking=release
Thread model: posix
gcc version 4.7.0 20120407 (prerelease) (GCC)

Sadly I'm unable to build the break again. I've installed gcc4.4 to be able to
build the project again. But now even gcc4.7 is able to build it..

Anything I can do to help?

Ben