The current snapshot 4.5-20090507 fails to bootstrap on Cygwin:
-------------------------------------------- [...] /tmp/build/./prev-gcc/xgcc -B/tmp/build/./prev-gcc/ -B/usr/local/gfortran/i686-pc-cygwin/bin/ -c -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -Wold-style-definition -Wc++-compat -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -DHAVE_CONFIG_H -I. -I. -I/tmp/gcc-4.5-20090507/gcc -I/tmp/gcc-4.5-20090507/gcc/. -I/tmp/gcc-4.5-20090507/gcc/../include -I/tmp/gcc-4.5-20090507/gcc/../libcpp/include -I/tmp/gcc-4.5-20090507/gcc/../libdecnumber -I/tmp/gcc-4.5-20090507/gcc/../libdecnumber/bid -I../libdecnumber -I. -I. -I/tmp/gcc-4.5-20090507/gcc -I/tmp/gcc-4.5-20090507/gcc/. -I/tmp/gcc-4.5-20090507/gcc/../include -I/tmp/gcc-4.5-20090507/gcc/../libcpp/include -I/tmp/gcc-4.5-20090507/gcc/../libdecnumber -I/tmp/gcc-4.5-20090507/gcc/../libdecnumber/bid -I../libdecnumber \ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c cc1: warnings being treated as errors /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:39: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:39: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:40: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:40: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:41: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:41: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:42: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:42: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:43: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:43: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:44: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:44: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:44: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:44: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:58: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:75: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:87: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:110: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:128: error: enum conversion in initialization is invalid in C++ /tmp/gcc-4.5-20090507/gcc/config/i386/msformat-c.c:145: error: enum conversion in initialization is invalid in C++ make[3]: *** [msformat-c.o] Error 1 make[3]: *** Waiting for unfinished jobs.... rm gfortran.pod gfdl.pod gcov.pod cpp.pod fsf-funding.pod gcc.pod make[3]: Leaving directory `/tmp/build/gcc' make[2]: *** [all-stage2-gcc] Error 2 make[2]: Leaving directory `/tmp/build' make[1]: *** [stage2-bubble] Error 2 make[1]: Leaving directory `/tmp/build' make: *** [all] Error 2 -------------------------------------------- Usually I do weekly build configuring with: ${gcc_dir}/configure --prefix=/usr/local/gfortran --exec-prefix=/usr/local/gfortran --sysconfdir=/usr/local/gfortran/etc --libdir=/usr/local/gfortran/lib --libexecdir=/usr/local/gfortran/lib --mandir=/usr/local/gfortran/share/man --infodir=/usr/local/gfortran/share/info --program-suffix=-4.4 --enable-languages=c,fortran --enable-bootstrap --enable-decimal-float=bid --enable-libgomp --enable-threads --enable-sjlj-exceptions --enable-version-specific-runtime-libs --enable-nls --enable-checking=release --disable-fixed-point --disable-libmudflap --disable-shared --disable-win32-registry --with-system-zlib --without-included-gettext --without-x Cheers, Angelo.