I have successfully compiled gcc version 2.95 19990728 (release) for rs6000-ibm-aix4.3.2.0. Counting all warnings, there are 3 warnings in stage3 of this bootstrap. Number of warnings per file: 2 cxxmain.c 1 ../../../gcc/gcc/f/com.c Number of warning types: 2 assignment discards qualifiers from pointer target type 1 unused parameter `???'