internal compiler error: Segmentation fault

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1 msg	movdqa and movdqu
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16 msg	installed, compiled, how to link?
4 msg	c++ template instanciation and dlls on win32
2 msg	linking internal executible functions: 'undefin...

internal compiler error: Segmentation fault
\ Lee Rhodes (29 Jun 2007)

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10 msg	Is fastcall broken?
3 msg	gcc-4.1.1: ssp (stack smashing protector) for a...
2 msg	template function inlining in g++ version < 4.0
2 msg	-fPIC and shared object

Subject:	internal compiler error: Segmentation fault
Group:	Gcc-help
From:	Lee Rhodes
Date:	29 Jun 2007

Hello,
I am attempting to build gcc 4.3.0-20070622 on i686-pc-cygwin 1.5.24-2.
Cygwin has been updated with the cygwin-inst-20070616.tar.bz2 in order to
obtain Dave Korn's stdio.h / newlib fix (which I have verified is there).

The config options are:
--prefix=/usr/local/gcc-4.3-20070622
--disable-shared
--enable-sjlj-exceptions
--enable-bootstrap
--enable-libgomp
--enable-libmudflap
--enable-threads=posix
--enable-languages='c c++'

=== gcc Summary ===

# of expected passes 46896
# of unexpected failures 67
# of unexpected successes 2
# of expected failures 134
# of untested testcases 42
# of unsupported tests 447

However, looking more closely at the unexpected fails, I noticed that there
were 12 more than Tim Prince's idential build/test. These fails all have the
following signature in the gcc.log (I have deleted the paths and duplicate
lines to make it easier to read):

Executing on host: xgcc -O2 -w -fno-show-column -o 20001226-1.o
gcc.c-torture/compile/20001226-1.c
gcc.c-torture/compile/20001226-1.c: In function 'foo':
gcc.c-torture/compile/20001226-1.c:23: internal compiler error:
Segmentation fault
FAIL: gcc.c-torture/compile/20001226-1.c (internal compiler error)

I can duplicate these failures more precisely with the following
make check-gcc RUNTESTFLAGS="compile.exp=20001226-1.c"

It is perhaps notable that this particular torture test does PASS at
optimization settings of -O0 and -O1, but always has the same failure
signature at Optimizations of -O2, -O3 and -Os. Also I noted that the only
one of these tests that failed on Tim's build was the -Os, but it was a
different failure and not the Segmentation fault I am getting.

The only other unusual messages appear at the end of the build standard
error output:

configure: error: none of the known symbol names works
make[1]: *** [configure-target-libmudflap] Error 1
make: *** [bootstrap] Error 2
9 [unknown (0xCA4)] conftest 7216 _cygtls::handle_exceptions: Error
while dumping state (probably corrupted stack)

I am stuck. I don't know what a Segmentation fault is, but since Tim got
his build to test without any segmentation faults, I'm not sure it is a bug.
I suspect that perhaps my Cygwin may be corrupted or missing something.

Does anyone have any suggestions?

Thanks,

Lee.