Bugs item #832159, was opened at 2003-10-29 04:27
Message generated for change (Comment added) made by dobesv
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Category: Distutils
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Allen Chan (alydar)
Assigned to: Nobody/Anonymous (nobody)
Summary: C++ extensions using SWIG and MinGW
Initial Comment:
Using the following three files:
-- begin files -----
/* hello.cpp */
#include <stdio.h>
void hello()
{
printf("hello world\n");
}
------------------
/* hello.i */
%module hello
extern void hello();
------------------
# setup.py
import distutils
from distutils.core import setup, Extension
setup(name = "Hello World",
version = "1.0",
ext_modules = [Extension("_hello",
["hello.i","hello.cpp"])])
-- end files -------
executing the command:
"python setup.py build_ext -cmingw32 --swig-cpp -f"
creates the following output:
-- begin output --
running build_ext
building '_hello' extension
swigging hello.i to hello_wrap.cpp
...
[ snipped ]
...
cc -mno-cygwin -shared -s build\temp.win32-2.3
\Release\hello_wrap.o build\temp.w
in32-2.3\Release\hello.o build\temp.win32-2.3
\Release\_hello.def -LC:\p\Python23
\libs -LC:\p\Python23\PCBuild -lpython23 -o
build\lib.win32-2.3\_hello.pyd
error: command 'cc' failed: No such file or directory
-- end output --
It appears that unixccompiler.py defaults compiler_cxx
to use "cc" and then uses it for the linking, and
cygwinccompiler.py does not override the compiler_cxx
entry. If the self.set_executable() call in the __init__*(
function of the Mingw32Compiler class also sets
compiler_cxx to use "g++", then the extension build will
work.
----------------------------------------------------------------------
Comment By: Dobes V (dobesv)
Date: 2007-05-22 17:18
Message:
Logged In: YES
user_id=400635
Originator: NO
Here's a workaround I used to fix the linker:
# Force g++ for linking
import distutils.sysconfig
old_customize_compiler = distutils.sysconfig.customize_compiler
def customize_compiler(compiler):
old_customize_compiler(compiler)
if compiler.compiler_type == 'mingw':
compiler.set_executables(linker_so='g++ -mno-cygwin -shared')
distutils.sysconfig.customize_compiler = customize_compiler
You could also override the compiler, too.
----------------------------------------------------------------------
Comment By: Kef X-Schecter (furrykef)
Date: 2004-08-20 17:26
Message:
Logged In: YES
user_id=536129
ARGH! This bug is still in Python 2.3.4 and should have been
fixed A LONG TIME AGO! What am I supposed to do, have my
users fix their distutils by hand?
Sorry to be so gripy, but jeez. It tells you how to freaking
fix it...
----------------------------------------------------------------------
Comment By: David S. Rushby (woodsplitter)
Date: 2004-02-11 23:18
Message:
Logged In: YES
user_id=414645
I also encountered this bug while trying to build a C++
extension with no SWIG involved.
----------------------------------------------------------------------
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=832159&group_id=5470
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