http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45084
--- Comment #10 from Ralf Wildenhues <rwild at gcc dot gnu.org> 2010-12-09 20:58:00 UTC --- (In reply to comment #9) > ../gcc-4.5.0/configure --target=powerpc-ibm-eabi --with-newlib --disable-nls > --disable-multilib i686-ibm-cygwin > > ... > checking stdbool.h usability... no > checking stdbool.h presence... yes > configure: WARNING: stdbool.h: present but cannot be compiled Please take a look at the config.log file that corresponds to the above output (I suppose that is m68k-elf/libstdc++-v3/config.log ?) and find the compile error caused by use of stdbool.h. Cut'n'paste the compile command and error here, please. Maybe it's clear then how to proceed. Thanks.