https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67950
--- Comment #2 from Hans Streibel <streibel.2003 at gmx dot net> --- Ok, here is the missing Information: [root@dev71 tmp]# /opt/gcc-4.9.3-hans/bin/gcc -v Using built-in specs. COLLECT_GCC=/opt/gcc-4.9.3-hans/bin/gcc COLLECT_LTO_WRAPPER=/opt/gcc-4.9.3-hans/libexec/gcc/powerpc-ibm-aix7.1.0.0/4.9.3/lto-wrapper Target: powerpc-ibm-aix7.1.0.0 Configured with: ./configure --with-as=/usr/bin/as --with-ld=/usr/bin/ld --prefix=/opt/gcc-4.9.3-hans --enable-languages=c,c++ --enable-version-specific-runtime-libs --disable-nls --enable-decimal-float=dpd --host=powerpc-ibm-aix7.1.0.0 Thread model: aix gcc version 4.9.3 (GCC) Compiler warnings: Beside the warnings that where already in the original post, there are no warnings, even None with -W and -Wall Preprocessed files: - tcpserver.i (produced by gcc) - tcpserver.ii (produced by g++)