https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68454
--- Comment #11 from M Joshua Ryan <luser.droog at gmail dot com> --- Created attachment 36831 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36831&action=edit additional source triggering same error Having successfully compiled the other file, I have received the same error on a different file. Again it appears to involve mixing floating-point types. CC src/lib/src_lib_libxpost_la-xpost_op_math.lo src/lib/xpost_op_math.c: In function ‘Ratan’: src/lib/xpost_op_math.c:341:5: internal compiler error: Segmentation fault real ang = atan2((num.real_.val * RAD_PER_DEG), ^ Please submit a full bug report, with preprocessed source if appropriate. `real` is a typedef for float.