I just tried to compile Suse Linux package rasmol-2.7.3.1-44 with the GNU C++ compiler version 4.3 snapshot 20070309.
The compiler said repres.c: In function 'InitialiseRepres': repres.c:1638: internal compiler error: in cse_find_path, at cse.c:5930 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Preprocessed source code attached. Flag -O3 required. -- Summary: ice for legal code with -O3 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=31135