On AIX 5.3, g++ version 4.4.0 and 4.4.1 cannot find the libstdc++ in default location. This did not occur with 4.3.x. The problem has been already discussed on the mailing list in this thread: http://gcc.gnu.org/ml/gcc-help/2009-06/msg00092.html and a patch was issued. It was supposedly committed to the main branch after 4.4.0, but for some reason was not present (or did not solve the issue) in 4.4.1.
I have compiled gcc with --disable-shared and use the AIX linker ld, not the GNU linker. This is the verbose compilation output of a simple Hello World program written in C++: Using built-in specs. Target: powerpc-ibm-aix5.3.0.0 Configured with: /hpc/work/fernandz/gnusrc/gcc-4.4.1/configure --enable-threads --enable-languages=c,c++ --prefix=/hpc/work/fernandz/gnu --enable-threads --disable-shared --enable-version-specific-runtime-libs --disable-nls --with-gmp=/hpc/work/fernandz/gnu --with-mpfr=/hpc/work/fernandz/gnu --with-ppl=/hpc/work/fernandz/gnu --with-cloog=/hpc/work/fernandz/gnu Thread model: aix gcc version 4.4.1 (GCC) COLLECT_GCC_OPTIONS='-v' '-o' 'hello' /hpc/work/fernandz/gnu/libexec/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/cc1plus -quiet -v -D_ALL_SOURCE hellow.cpp -quiet -dumpbase hellow.cpp -auxbase hellow -version -o /hpc/home/fernandz/User-Tmp/ccrprayy.s ignoring nonexistent directory "/hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/../../../../powerpc-ibm-aix5.3.0.0/include" #include "..." search starts here: #include <...> search starts here: /hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/include/c++ /hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/include/c++/powerpc-ibm-aix5.3.0.0 /hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/include/c++/backward /usr/local/include /hpc/work/fernandz/gnu/include /hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/include /hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/include-fixed /usr/include End of search list. GNU C++ (GCC) version 4.4.1 (powerpc-ibm-aix5.3.0.0) compiled by GNU C version 4.4.1, GMP version 4.3.1, MPFR version 2.4.1-p5. GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: f579180f2de70dc0754151f494907fb7 COLLECT_GCC_OPTIONS='-v' '-o' 'hello' as -u -mppc -o /hpc/home/fernandz/User-Tmp/ccwslsmj.o /hpc/home/fernandz/User-Tmp/ccrprayy.s COMPILER_PATH=/hpc/work/fernandz/gnu/libexec/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/:/hpc/work/fernandz/gnu/libexec/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/:/hpc/work/fernandz/gnu/libexec/gcc/powerpc-ibm-aix5.3.0.0/:/hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/:/hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/ LIBRARY_PATH=/hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/:/hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-v' '-o' 'hello' /hpc/work/fernandz/gnu/libexec/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/collect2 -bpT:0x10000000 -bpD:0x20000000 -btextro -bnodelcsect -o hello /lib/crt0.o -L/hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1 -L/hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/../../.. /hpc/home/fernandz/User-Tmp/ccwslsmj.o -lstdc++ -lsupc++ -lm /hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/libgcc.a -lc /hpc/work/fernandz/gnu/lib/gcc/powerpc-ibm-aix5.3.0.0/4.4.1/libgcc.a collect2: library libstdc++ -lsupc++ not found -- Summary: g++ does not find lstdc++ on AIX Product: gcc Version: 4.4.1 Status: UNCONFIRMED Severity: blocker Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: efernandez at physiomics-plc dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40871