Mailman 3 May 2001 - Distutils-SIG

Sample setup.py for Numeric Python
by Greg Ward April 30, 2018

April 30, 2018

Hi again -- [cc'd to Paul Dubois: you said you weren't following the distutils sig anymore, but this directly concerns NumPy and I'd like to get your input!] here's that sample setup.py for NumPy. See below for discussion (and questions!). ------------------------------------------------------------------------ #!/usr/bin/env python # Setup script example for building the Numeric extension to Python. # This does sucessfully compile all the .dlls. Nothing happens # with the .py files currently. # Move this file to the Numerical directory of the LLNL numpy # distribution and run as: # python numpysetup.py --verbose build_ext # # created 1999/08 Perry Stoll __rcsid__ = "$Id: numpysetup.py,v 1.1 1999/09/12 20:42:48 gward Exp $" from distutils.core import setup setup (name = "numerical", version = "0.01", description = "Numerical Extension to Python", url = "http://www.python.org/sigs/matrix-sig/", ext_modules = [ ( '_numpy', { 'sources' : [ 'Src/_numpymodule.c', 'Src/arrayobject.c', 'Src/ufuncobject.c' ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/numpy.def' } ), ( 'multiarray', { 'sources' : ['Src/multiarraymodule.c'], 'include_dirs' : ['./Include'], 'def_file': 'Src/multiarray.def' } ), ( 'umath', { 'sources': ['Src/umathmodule.c'], 'include_dirs' : ['./Include'], 'def_file' : 'Src/umath.def' } ), ( 'fftpack', { 'sources': ['Src/fftpackmodule.c', 'Src/fftpack.c'], 'include_dirs' : ['./Include'], 'def_file' : 'Src/fftpack.def' } ), ( 'lapack_lite', { 'sources' : [ 'Src/lapack_litemodule.c', 'Src/dlapack_lite.c', 'Src/zlapack_lite.c', 'Src/blas_lite.c', 'Src/f2c_lite.c' ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/lapack_lite.def' } ), ( 'ranlib', { 'sources': ['Src/ranlibmodule.c', 'Src/ranlib.c', 'Src/com.c', 'Src/linpack.c', ], 'include_dirs' : ['./Include'], 'def_file' : 'Src/ranlib.def' } ), ] ) ------------------------------------------------------------------------ First, what d'you think? Too clunky and verbose? Too much information for each extension? I kind of think so, but I'm not sure how to reduce it elegantly. Right now, the internal data structures needed to compile a module are pretty obviously exposed: is this a good thing? Or should there be some more compact form for setup.py that will be expanded later into the full glory we see above? I've already made one small step towards reducing the amount of cruft by factoring 'include_dirs' out and supplying it directly as a parameter to 'setup()'. (But that needs code not in the CVS archive yet, so I've left the sample setup.py the same for now.) The next thing I'd like to do is get that damn "def_file" out of there. To support it in MSVCCompiler, there's already an ugly hack that unnecessarily affects both the UnixCCompiler and CCompiler classes, and I want to get rid of that. (I refer to passing the 'build_info' dictionary into the compiler classes, if you're familiar with the code -- that dictionary is part of the Distutils extension-building system, and should not propagate into the more general compiler classes.) But I don't want to give these weird "def file" things standing on the order of source files, object files, libraries, etc., because they seem to me to be a bizarre artifact of one particular compiler, rather than something present in a wide range of C/C++ compilers. Based on the NumPy model, it seems like there's a not-too-kludgy way to handle this problem. Namely: if building extension "foo": if file "foo.def" found in same directory as "foo.c" add "/def:foo.def" to MSVC command line this will of course require some platform-specific code in the build_ext command class, but I figured that was coming eventually, so why put it off? ;-) To make this hack work with NumPy, one change would be necessary: rename Src/numpy.def to Src/_numpy.def to match Src/_numpy.c, which implements the _numpy module. Would this be too much to ask of NumPy? (Paul?) What about other module distributions that support MSVC++ and thus ship with "def" files? Could they be made to accomodate this scheme? Thanks for your feedback -- Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Can now compile simple extensions
by Greg Ward April 30, 2018

April 30, 2018

Hi all -- at long last, I found the time to hack in the ability to compile extension modules to the Distutils. Mainly, this meant adding a 'build_ext' command which uses a CCompiler instance for all its dirty work. I also had to add a few methods to CCompiler (and, of course, UnixCCompiler) to make this work. And I added a new module, 'spawn', which takes care of running sub-programs more efficiently and robustly (no shell involved) than os.system. That's needed, obviously, so we can run the compiler! If you're in the mood for grubbing over raw source code, then get the latest from CVS or download a current snapshot. See http://www.python.org/sigs/distutils-sig/implementation.html for a link to the code snapshot. I'm still waiting for more subclasses of CCompiler to appear. At the very least, we're going to need MSVCCompiler to build extensions on Windows. Any takers? Also, someone who knows the Mac, and how to run compilers programmatically there, will have to figure out how to write a Mac-specific concrete CCompiler subclass. The spawn module also needs a bit of work to be portable. I suspect that _win32_spawn() (the intended analog to my _posix_spawn()) will be easy to implement, if it even needs to go in a separate function at all. It looks from the Python Library documentation for 1.5.2 that the os.spawnv() function is all we need, but it's a bit hard to figure out just what's needed. Windows wizards, please take a look at the 'spawn()' function and see if you can make it work on Windows. As for actually compiling extensions: well, if you can figure out the build_ext command, go ahead and give it a whirl. It's a bit cryptic right now, since there's no documentation and no example setup.py. (I have a working example at home, but it's not available online.) If you feel up to it, though, see if you can read the code and figure out what's going on. I'm just hoping *I'll* be able to figure out what's going on when I get back from the O'Reilly conference next week... ;-) Enjoy -- Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Two fixes (at last)
by Greg Ward April 30, 2018

April 30, 2018

Hi all -- at long last, I have fixed two problems that a couple people noticed a while ago: * I folded in Amos Latteier's NT patches almost verbatim -- just changed an `os.path.sep == "/"' to `os.name == "posix"' and added some comments bitching about the inadequacy of the current library installation model (I think this is Python's fault, but for now Distutils is slavishly aping the situation in Python 1.5.x) * I fixed the problem whereby running "setup.py install" without doing anything else caused a crash (because 'build' hadn't yet been run). Now, the 'install' command automatically runs 'build' before doing anything; to make this bearable, I added a 'have_run' dictionary to the Distribution class to keep track of which commands have been run. So now not only are command classes singletons, but their 'run' method can only be invoked once -- both restrictions enforced by Distribution. The code is checked into CVS, or you can download a snapshot at http://www.python.org/sigs/distutils-sig/distutils-19990607.tar.gz Hope someone (Amos?) can try the new version under NT. Any takers for Mac OS? BTW, all parties involved in the Great "Where Do We Install Stuff?" Debate should take a good, hard look at the 'set_final_options()' method of the Install class in distutils/install.py; this is where all the policy decisions about where to install files are made. Currently it apes the Python 1.5 situation as closely as I could figure it out. Obviously, this is subject to change -- I just don't know to *what* it will change! Greg -- Greg Ward - software developer gward(a)cnri.reston.va.us Corporation for National Research Initiatives 1895 Preston White Drive voice: +1-703-620-8990 Reston, Virginia, USA 20191-5434 fax: +1-703-620-0913

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Package versioning
by Timothy Docker April 30, 2018

April 30, 2018

Hi all, I've been aware that the distutils sig has been simmerring away, but until recently it has not been directly relevant to what I do. I like the look of the proposed api, but have one question. Will this support an installed system that has multiple versions of the same package installed simultaneously? If not, then this would seem to be a significant limitation, especially when dependencies between packages are considered. Assuming it does, then how will this be achieved? I am presently managing this with a messy arrangement of symlinks. A package is installed with its version number in it's name, and a separate directory is created for an application with links from the unversioned package name to the versioned one. Then I just set the pythonpath to this directory. A sample of what the directory looks like is shown below. I'm sure there is a better solution that this, and I'm not sure that this would work under windows anyway (does windows have symlinks?). So, has this SIG considered such versioning issues yet? Cheers, Tim -------------------------------------------------------------- Tim Docker timd(a)macquarie.com.au Quantative Applications Division Macquarie Bank -------------------------------------------------------------- qad16:qad $ ls -l lib/python/ total 110 drwxr-xr-x 2 mts mts 512 Nov 11 11:23 1.1 -r--r----- 1 root mts 45172 Sep 1 1998 cdrmodule_0_7_1.so drwxr-xr-x 2 mts mts 512 Sep 1 1998 chart_1_1 drwxr-xr-x 3 mts mts 512 Sep 1 1998 Fnorb_0_7_1 dr-xr-x--- 3 mts mts 512 Nov 11 11:21 Fnorb_0_8 drwxr-xr-x 3 mts mts 1536 Mar 3 12:45 mts_1_1 dr-xr-x--- 7 mts mts 512 Nov 11 11:22 OpenGL_1_5_1 dr-xr-x--- 2 mts mts 1024 Nov 11 11:23 PIL_0_3 drwxr-xr-x 3 mts mts 512 Sep 1 1998 Pmw_0_7 dr-xr-x--- 2 mts mts 512 Nov 11 11:21 v3d_1_1 qad16:qad $ ls -l lib/python/1.1 total 30 lrwxrwxrwx 1 root other 29 Apr 10 10:43 _glumodule.so -> ../OpenGL_1_5_1/_glumodule.so lrwxrwxrwx 1 root other 30 Apr 10 10:43 _glutmodule.so -> ../OpenGL_1_5_1/_glutmodule.so lrwxrwxrwx 1 root other 22 Apr 10 10:43 _imaging.so -> ../PIL_0_3/_imaging.so lrwxrwxrwx 1 root other 36 Apr 10 10:43 _opengl_nummodule.so -> ../OpenGL_1_5_1/_opengl_nummodule.so lrwxrwxrwx 1 root other 27 Apr 10 10:43 _tkinter.so -> ../OpenGL_1_5_1/_tkinter.so lrwxrwxrwx 1 mts mts 21 Apr 10 10:43 cdrmodule.so -> ../cdrmodule_0_7_1.so lrwxrwxrwx 1 mts mts 12 Apr 10 10:43 chart -> ../chart_1_1 lrwxrwxrwx 1 root other 12 Apr 10 10:43 Fnorb -> ../Fnorb_0_8 lrwxrwxrwx 1 mts mts 12 Apr 10 10:43 mts -> ../mts_1_1 lrwxrwxrwx 1 root other 15 Apr 10 10:43 OpenGL -> ../OpenGL_1_5_1 lrwxrwxrwx 1 root other 33 Apr 10 10:43 opengltrmodule.so -> ../OpenGL_1_5_1/opengltrmodule.so lrwxrwxrwx 1 root other 33 Apr 10 10:43 openglutil_num.so -> ../OpenGL_1_5_1/openglutil_num.so lrwxrwxrwx 1 root other 10 Apr 10 10:43 PIL -> ../PIL_0_3 lrwxrwxrwx 1 mts mts 10 Apr 10 10:43 Pmw -> ../Pmw_0_7 lrwxrwxrwx 1 root other 10 Apr 10 10:43 v3d -> ../v3d_1_1

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[Distutils-sig] distutils charter and interscript
by John Skaller April 30, 2018

April 30, 2018

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SWIG Support
by Gaspard, Bradley S June 23, 2001

June 23, 2001

I am a new distutils user. Can anyone tell me if the SWIG support is actually working and is there a way that it can support the -shadow option?? I am getting compile errors under distutils that I don't normally get (for an extention where I don't use the shadow option). Examples of setup.py scripts would be appreciated. SWIG1.1-883 Python 2.0 Thanks in advance. Brad

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Cygwin Python sys.platform and distutils.util.get_platform() patch
by Jason Tishler June 9, 2001

June 9, 2001

I would like to submit the attached patch (i.e., the first attachment) to Python CVS for inclusion in 2.2. IMO, this is the right solution for many reasons. I have included one example as the the second attachment. If the patch is accepted, then I will back patch and re-release my Cygwin Python 2.1 distribution. Since these two simple changes have possibly far reaching ramifications, I thought that it would be prudent to solicit feedback before submitting the patch. My goal is to eliminate (or at least minimize) the heartache caused by these changes, if any. Note that the two parts of the patch are actually independent but related so I have decided to submit them as one patch instead of two. The first part changes sys.platform, sys.path, and the platform specific module directory name as follows: $ # before patch $ python -c 'import sys; print sys.platform' cygwin_nt-4.01 $ python -c 'import sys; print sys.path' [..., '/usr/lib/python2.1/plat-cygwin_nt-4.01', ...] $ find /usr/lib/python2.1 -name '*cygwin*' -type d /usr/lib/python2.1/plat-cygwin_nt-4.01 $ # after patch $ python -c 'import sys; print sys.platform' cygwin $ python -c 'import sys; print sys.path' [..., '/usr/lib/python2.1/plat-cygwin', ...] $ find /usr/lib/python2.1 -name '*cygwin*' -type d /usr/lib/python2.1/plat-cygwin The second part changes sys.path (only when Python is run out of the build tree) and the directory names used by distutils when building extension modules: $ # before patch $ python -c 'import sys; print sys.path' [..., '/home/jt/src/Python-2.1/build/lib.cygwin_nt-4.0-1.3.2-i686-2.1'] $ find . -name '*cygwin*' ./build/lib.cygwin_nt-4.0-1.3.0-i686-2.1 ./build/temp.cygwin_nt-4.0-1.3.0-i686-2.1 $ # after patch $ python -c 'import sys; print sys.path' [..., '/home/jt/src/Python-2.1/build/lib.cygwin-1.3.2-i686-2.1'] $ find . -name '*cygwin*' ./build/lib.cygwin-1.3.2-i686-2.2 ./build/temp.cygwin-1.3.2-i686-2.2 If I don't receive any negative responses to this patch proposal by 2001/6/1 9:00 EDT, then I will submit this patch to the SourceForge Python Patch Manager. Thanks, Jason -- Jason Tishler Director, Software Engineering Phone: 732.264.8770 x235 Dot Hill Systems Corp. Fax: 732.264.8798 82 Bethany Road, Suite 7 Email: Jason.Tishler(a)dothill.com Hazlet, NJ 07730 USA WWW: http://www.dothill.com

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Re: [Distutils] macos support (weak?)
by Jack Jansen May 27, 2001

May 27, 2001

Recently, "Pete Shinners" <shredwheat(a)mediaone.net> said: > i've got some people doing MacOS testing for my extension > package. currently support is great under windows and unix. > > i was under the impression python2.1 shipped with some > distutils code that was ready to go for macos? but from the > reports i hear this is not the case? Yes, it's in there. You need the distutils support with MacPython, though, some of the fixes needed for MacPython 2.1 did not make it to the CVS repository in time. But the one incorporated in the MacPython distirbution should work. But then: I'm the only one to ever have tested it, so..... :-) > the first problem is that it appears distutils does not > find the default "site-packages" on its own? It finds it for me. Hmm, idea: maybe the directory should exist, and it doesn't exist in the distribution? Ask your mac tester to create Python:Lib:site-packages and try again. If that's the problem I'll force site-packages to be created next time. > does mac have some sort of PYTHONHOME equivalent it can use to > find its home? certainly there must be something because python > can find all its own modules and packages. can distutils somehow > tap into this knowledge to save the installer from entering the > site-packages path when installing? sys.prefix. And this is indeed what distutils uses, if I'm not mistaken. > the second problem is a little more serious. my project is > using an external setup file to get all the extension compile flags. > the library directories are being sent with "-Llibrary/path/lib" > this works for windows and unix, but on macos it is creating > absolute paths, not relative. so it looks like to get it working > the user needs something like -Lmacintosh hd/libs, but the space > is throwing things for a loop. does a backslash work before the > space? anyways, when given a relative path it is becoming > an absolute path I never tried this, so I wouldn't know. For the things I tried I've never needed a library path (and it would actually be dangerous too) and I've always spelled out the filename paths to the specific libraries I use. But the thing to remember is that all the paths you use within distutils are URLs (even though they look very much like unix pathnames to the unsuspecting eye:-) so ../../bla should work even on a Mac, and you should be able to using %20 for space should work fine. > lastly, and most important of all, it looks like the libraries > being passed in with "-l" are not even being sent through the XML > to codewarrior. Where are you passing the libraries with "-l"? In the linker switches? That is the wrong place, unless I'm mistaken. They should be in the "libraries" attribute. -L and -l are unixisms. Hmm, that is: unless the distutils infrastructure on Windows parses them to emulate their behaviour, in which case I guess it should do the same on the Mac. Can anyone shed a light on this? > anyways, my guess is that this is all related to using the > external Setup file and loading it with read_setup_file(). is > that not really been used for macos stuff? if sending proper > Extension objects to the setup function is all thats needed then > i can workaround this pretty easy. You've lost me here. What's an external setup file? I asusme you don't mean the setup.py which is part of your package (and, thus, external to distutils) but something else? (the sofist answer would probably be "where is it documented?" :-) > has anyone had any luck building distutils extensions on macos > when needing to link in extra libraries? Yes, but I wouldn't be surprised if it was only your's truly:-) -- Jack Jansen | ++++ stop the execution of Mumia Abu-Jamal ++++ Jack.Jansen(a)oratrix.com | ++++ if you agree copy these lines to your sig ++++ www.oratrix.nl/~jack | see http://www.xs4all.nl/~tank/spg-l/sigaction.htm

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macos support (weak?)
by Pete Shinners May 26, 2001

May 26, 2001

i've got some people doing MacOS testing for my extension package. currently support is great under windows and unix. i was under the impression python2.1 shipped with some distutils code that was ready to go for macos? but from the reports i hear this is not the case? unfortunately, i've got not mac to test this on, so it comes to you all second hand. i'm hoping there's a mac user or two in here who can lend some knowledge. the first problem is that it appears distutils does not find the default "site-packages" on its own? distutils.error.DistUtilsPlatformError: OK, where DO site-specific modules go on the Mac? does mac have some sort of PYTHONHOME equivalent it can use to find its home? certainly there must be something because python can find all its own modules and packages. can distutils somehow tap into this knowledge to save the installer from entering the site-packages path when installing? the second problem is a little more serious. my project is using an external setup file to get all the extension compile flags. the library directories are being sent with "-Llibrary/path/lib" this works for windows and unix, but on macos it is creating absolute paths, not relative. so it looks like to get it working the user needs something like -Lmacintosh hd/libs, but the space is throwing things for a loop. does a backslash work before the space? anyways, when given a relative path it is becoming an absolute path lastly, and most important of all, it looks like the libraries being passed in with "-l" are not even being sent through the XML to codewarrior. anyways, my guess is that this is all related to using the external Setup file and loading it with read_setup_file(). is that not really been used for macos stuff? if sending proper Extension objects to the setup function is all thats needed then i can workaround this pretty easy. has anyone had any luck building distutils extensions on macos when needing to link in extra libraries?

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replacing *.in from autoconf-land
by David Arnold May 24, 2001

May 24, 2001

i'm in the middle of moving a package from using autoconf to distutils, and i'm having trouble finding a good way to do substitution of configured/discovered options into a template file. in autoconf, i have a config.py.in file, which contains lines of the form default_url = "@default_url@" at configure time, the @foo@ values are replaced with real content, from --with-default-url options to configure, and various other discovered stuff. the package is pure Python, so i have been able to just run install, which in turn ran build, and i don't really want to add a config step unless i have to. i have played with sub-classing the build command, and adding a file copy and substitute step into the run command, but ... has anyone else done something like this? any suggestions? d

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