I just tried to compile Suse package gwc-0.21.07-2 with the new GNU C compiler version 4.3 snapshot 20061230.
The compiler said drawing.c: In function 'draw_sonogram': drawing.c:779: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Here is some help from valgrind ==5510== Invalid read of size 1 ==5510== at 0x7BCB62: subreg_nregs (rtlanal.c:3153) ==5510== by 0x8E009E: add_stored_regs (caller-save.c:548) ==5510== by 0x7B874D: note_stores (rtlanal.c:1386) ==5510== by 0x8DFD86: insert_one_insn (caller-save.c:858) ==5510== by 0x8DFF4D: insert_restore (caller-save.c:698) ==5510== by 0x8E029E: save_call_clobbered_regs (caller-save.c:487) ==5510== by 0x7B6ED4: reload (reload1.c:976) ==5510== by 0x8FFFA2: rest_of_handle_global_alloc (global.c:627) ==5510== by 0x80F684: execute_one_pass (passes.c:926) ==5510== by 0x80F87B: execute_pass_list (passes.c:974) ==5510== by 0x80F88D: execute_pass_list (passes.c:975) ==5510== by 0x49EF1D: tree_rest_of_compilation (tree-optimize.c:463) ==5510== Address 0xAFAFAFAF00000002 is not stack'd, malloc'd or (recently) free'd Preprocessed source code attached. Flag -O2 required. -- Summary: Segmentation fault for legal code with -O2 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dcb314 at hotmail dot com GCC host triplet: x86_64-suse-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30339