https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99913
Bug ID: 99913 Summary: GCC11 fails to build for MinGW-w64 for Windows 32-bit Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: brechtsanders at users dot sourceforge.net Target Milestone: --- Created attachment 50509 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50509&action=edit i686-w64-mingw32/libgomp/config.log When building GCC 11 (including latest snapshot 20210404) against MinGW-w64 for Windows 32-bit using an existing MinGW-w64 Windows 32-bit gcc configure stops with the following error: configure: error: unsupported system, cannot find sizeof (omp_lock_t) This error is logged to file i686-w64-mingw32/libgomp/config.log which I have attached. At first glance it seems like it's not finding symbols that require -lwinpthread Note that there are no issues building GCC 11 against MinGW-w64 for Windows 64-bit.