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gcc segfaults compiling python extensions


Hello CygWin maintainers,

I want to report an observation, which might help address a bug.

This issue has been reported in the past in:
https://cygwin.com/ml/cygwin/2014-10/msg00502.html

I recently ran into the same issue:

On AppVeyor [https://ci.appveyor.com/] running Windows Server 2012 R2
With the latest available cygwin 32-bit
[https://github.com/libyal/libfwnt/blob/master/appveyor.yml#L39]

building a Python module for CygWin python (no Windows Python) causes
gcc to SIGSEGV (11)

gcc -fno-strict-aliasing -ggdb -O2 -pipe
-Wimplicit-function-declaration
-fdebug-prefix-map=/usr/src/ports/python2/python2-2.7.13-1.i686/build=/usr/src/debug/python2-2.7.13-1
-fdebug-prefix-map=/usr/src/ports/python2/python2-2.7.13-1.i686/src/Python-2.7.13=/usr/src/debug/python2-2.7.13-1
-DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -DHAVE_CONFIG_H=
-DLOCALEDIR="/usr/share/locale" -Iinclude -Icommon -Ilibcerror
-Ilibcthreads -Ilibcdata -Ilibcnotify -Ilibfwnt
-I/usr/include/python2.7 -c libcerror/libcerror_error.c -o
build/temp.cygwin-2.8.2-i686-2.7/libcerror/libcerror_error.o
error: command 'gcc' terminated by signal 11
Running: 'setup.py build' failed

Also see: https://ci.appveyor.com/project/joachimmetz/libfwnt/build/79/job/l1gqocdqoafax0k7


As per: https://cygwin.com/ml/cygwin/2014-10/msg00552.html I switched
to Windows Server 2016 and this indeed does not show the same issue.

I've been tracking this in: https://github.com/libyal/libyal/issues/34

Hope to have sufficiently informed you.

Let me know if you need additional information.

Kind regards,
Joachim

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