On i686-pc-mingw32, configuring with the following: ../gcc/configure --prefix=/mingw --enable-languages=c,fortran --with-gmp=$HOME/local --with-mpfr=$HOME/local --disable-libssp --disable-libmudflap --disable-nls --with-ld=/mingw/bin/ld --with-as=/mingw/bin/as
and running make gives: cc1.exe: warnings being treated as errors ../../gcc/gcc/tree-pretty-print.c: In function 'dump_bb_header': ../../gcc/gcc/tree-pretty-print.c:2267: warning: ISO C does not support the 'I' printf flag ../../gcc/gcc/tree-pretty-print.c:2267: warning: format '%I64d' expects type 'int', but argument 3 has type 'gcov_type' make: *** [tree-pretty-print.o] Error 1 -- Summary: Werror problem in build Product: gcc Version: 4.2.0 Status: UNCONFIRMED Keywords: build Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: fxcoudert at gcc dot gnu dot org GCC build triplet: i686-pc-mingw32 GCC host triplet: i686-pc-mingw32 GCC target triplet: i686-pc-mingw32 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25502