[Cygwin] Failure in building current GCC snapshot

[Allan McRae]

Angelo Graziosi wrote:
> At least on Cygwin (1.7), the current GCC snapshot (20090917) fails to 
> build:
>
> [...]
> /tmp/build/./gcc/xgcc -B/tmp/build/./gcc/ 
> -B/usr/local/gfortran/i686-pc-cygwin/bin/ 
> -B/usr/local/gfortran/i686-pc-cygwin/lib/ -isystem 
> /usr/local/gfortran/i686-pc-cygwin/include -isystem 
> /usr/local/gfortran/i686-pc-cygwin/sys-include    -g -O2 -O2 
> -I/tmp/gcc-4.5-20090917/gcc/../winsup/w32api/include 
> -I/tmp/gcc-4.5-20090917/gcc/../winsup/include 
> -I/tmp/gcc-4.5-20090917/gcc/../winsup/cygwin/include -g -O2 -DIN_GCC 
> -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes 
> -Wmissing-prototypes -Wold-style-definition  -isystem ./include   -g 
> -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED   -I. -I. 
> -I../.././gcc -I/tmp/gcc-4.5-20090917/libgcc 
> -I/tmp/gcc-4.5-20090917/libgcc/. -I/tmp/gcc-4.5-20090917/libgcc/../gcc 
> -I/tmp/gcc-4.5-20090917/libgcc/../include 
> -I/tmp/gcc-4.5-20090917/libgcc/../libdecnumber/dpd 
> -I/tmp/gcc-4.5-20090917/libgcc/../libdecnumber -DHAVE_CC_TLS -o 
> _powitf2.o -MT _powitf2.o -MD -MP -MF _powitf2.dep -DL_powitf2 -c 
> /tmp/gcc-4.5-20090917/libgcc/../gcc/libgcc2.c \
>     
> /tmp/gcc-4.5-20090917/libgcc/../gcc/libgcc2.c: In function '__powisf2':
> /tmp/gcc-4.5-20090917/libgcc/../gcc/libgcc2.c:1739:1: internal 
> compiler error: in convert_regs_1, at reg-stack.c:3052
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
> make[3]: *** [_powisf2.o] Error 1
> make[3]: *** Waiting for unfinished jobs....
> /tmp/gcc-4.5-20090917/libgcc/../gcc/libgcc2.c: In function '__powidf2':
> /tmp/gcc-4.5-20090917/libgcc/../gcc/libgcc2.c:1739:1: internal 
> compiler error: in convert_regs_1, at reg-stack.c:3052
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
> make[3]: *** [_powidf2.o] Error 1
> /tmp/gcc-4.5-20090917/libgcc/../gcc/libgcc2.c: In function '__powixf2':
> /tmp/gcc-4.5-20090917/libgcc/../gcc/libgcc2.c:1739:1: internal 
> compiler error: in convert_regs_1, at reg-stack.c:3052
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <http://gcc.gnu.org/bugs.html> for instructions.
> make[3]: *** [_powixf2.o] Error 1
> make[3]: Leaving directory `/tmp/build/i686-pc-cygwin/libgcc'
> make[2]: *** [all-stage2-target-libgcc] Error 2
> make[2]: Leaving directory `/tmp/build'
> make[1]: *** [stage2-bubble] Error 2
> make[1]: Leaving directory `/tmp/build'
> make: *** [all] Error 2
> -------------------------------------------------------
>
> I have configured with:
>
> -----
> ${source_dir}/configure --prefix="${prefix_dir}" \
>     --exec-prefix="${eprefix_dir}" \
>     --sysconfdir="${sysconf_dir}" \
>     --libdir="${lib_dir}" \
>     --libexecdir="${libexec_dir}" \
>     --mandir="${man_dir}" \
>     --infodir="${info_dir}" \
>     --program-suffix="${suffix}" \
>     --enable-bootstrap \
>     --enable-checking=release \
>     --enable-decimal-float \
>     --enable-languages=c,c++,fortran \
>     --enable-libgomp \
>     --enable-libssp \
>     --enable-nls \
>     --enable-threads=posix \
>     --enable-version-specific-runtime-libs \
>     --disable-libmudflap \
>     --disable-shared \
>     --disable-sjlj-exceptions \
>     --disable-win32-registry \
>     --with-arch=i686 \
>     --with-dwarf2 \
>     --with-system-zlib \
>     --with-tune=generic \
>     --without-included-gettext \
>     --without-x
> -----
>
> The previous snapshot (20090910) builds fine, with the same methods.

Seems to be the same as http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41395

Allan