Without a C++ host compiler (AC_PROG_CXX fails) bootsrap with --enbale-build-with-cxx fails like
config.status: creating nm config.status: creating Makefile config.status: creating gccbug config.status: creating ada/gcc-interface/Makefile config.status: creating ada/Makefile config.status: creating auto-host.h config.status: executing default commands make[2]: Leaving directory `/home/abuild/rguenther/obj' make[1]: *** [stage1-bubble] Error 2 make[1]: Leaving directory `/home/abuild/rguenther/obj' make: *** [all] Error 2 instead of complaining for the lack of a C++ host compiler. -- Summary: [boot with C++] configure does not check presence of host C++ compiler Product: gcc Version: 4.6.0 Status: UNCONFIRMED Keywords: build Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rguenth at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44432