Fix Cygwin Cython compilation issue

[kcrisman]

sage -t  devel/sage-main/sage/misc/cython.py
Compiling hello.spyx...
cp: cannot stat `/home/Administrator/.sage/temp/CETGORD_J5FGIPM/7732/spyx/hello/hello.so': No such file or directory
**********************************************************************
File "/home/sagetest/sage-5.8.beta4/devel/sage-main/sage/misc/cython.py", line 695:
    sage: cython_create_local_so('hello.spyx')
Exception raised:
    Traceback (most recent call last):
      File "/home/sagetest/sage-5.8.beta4/local/bin/ncadoctest.py", line 1231, in run_one_test
        self.run_one_example(test, example, filename, compileflags)
      File "/home/sagetest/sage-5.8.beta4/local/bin/sagedoctest.py", line 38, in run_one_example
        OrigDocTestRunner.run_one_example(self, test, example, filename, compileflags)
      File "/home/sagetest/sage-5.8.beta4/local/bin/ncadoctest.py", line 1172, in run_one_example
        compileflags, 1) in test.globs
      File "<doctest __main__.example_13[8]>", line 1, in <module>
        cython_create_local_so('hello.spyx')###line 695:
    sage: cython_create_local_so('hello.spyx')
      File "/home/sagetest/sage-5.8.beta4/local/lib/python/site-packages/sage/misc/cython.py", line 706, in cython_create_local_so
        cython(filename, compile_message=True, use_cache=False, create_local_so_file=True)
      File "/home/sagetest/sage-5.8.beta4/local/lib/python/site-packages/sage/misc/cython.py", line 554, in cython
        raise RuntimeError, "Error making local copy of shared object library for %s"%filename
    RuntimeError: Error making local copy of shared object library for hello.spyx
**********************************************************************

Apply attachment: trac_14387.patch

CC: @jpflori @dimpase

Component: porting: Cygwin

Author: Jean-Pierre Flori

Reviewer: Karl-Dieter Crisman

Merged: sage-5.9.beta3

Issue created by migration from https://trac.sagemath.org/ticket/14387

[kcrisman]

comment:1

This is with the Cygwin system gcc 4.5.3. Perhaps it would work better with the Sage one, but I won't have the chance to try this in the near future.

[jpflori]

comment:2

Same with Sage's GCC.

[jpflori]

comment:3

Ok, it's just because we're looking for a .so file but gcc produces a .dll one.

[jpflori]

comment:4

Attachment: trac_14387.patch.gz

[jpflori]

Author: Jean-Pierre Flori

[kcrisman]

comment:5

That's simple enough, I'll try that out.

Works, great!

[kcrisman]

Reviewer: Karl-Dieter Crisman

[jdemeyer]

Merged: sage-5.9.beta3