I just tried to compile package doxygen-1.4.6-3 from Suse Linux with a recent GNU C compiler version 4.2 snapshot 20060128.
The compiler snapshot said util.cpp: In function "QCString dateToString(bool)": util.cpp:1958: internal compiler error: in cp_expr_size, at cp/cp-objcp-common.c:101 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. It seems that the flag -O2 is required. Preprocessed source code attached. -- Summary: ice at cp/cp-objcp-common.c:101 Product: gcc Version: 4.2.0 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=26022