I just tried to compile package FlightGear-0.9.10-40 with the GNU C++ compiler version 4.3 snapshot 20070112.
The compiler said replay.cxx: In function 'FGReplayData interpolate(double, FGReplayData, FGReplayData)': replay.cxx:224: 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 ==7400== Invalid read of size 8 ==7400== at 0x5C731A: finalize_ssa_vuses (tree-ssa-operands.c:553) ==7400== by 0x5C8047: finalize_ssa_stmt_operands (tree-ssa-operands.c:1169) ==7400== by 0x5C8D3D: update_stmt_operands (tree-ssa-operands.c:2357) ==7400== by 0x5D20C4: compute_may_aliases (tree-flow-inline.h:388) ==7400== by 0x905CC4: execute_one_pass (passes.c:951) ==7400== by 0x905EFB: execute_pass_list (passes.c:999) ==7400== by 0x905F0D: execute_pass_list (passes.c:1000) ==7400== by 0x58D0D1: tree_rest_of_compilation (tree-optimize.c:543) ==7400== by 0x4F0317: expand_body (semantics.c:3095) ==7400== by 0x95EF41: cgraph_expand_function (cgraphunit.c:989) ==7400== by 0x960F75: cgraph_optimize (cgraphunit.c:1052) ==7400== by 0x4924D4: cp_write_global_declarations (decl2.c:3347) ==7400== Address 0xAFAFAFAFAFAFAFAF 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=30490