[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Hubert Holin]

Hubert Holin  added the comment:

Yes, the error turned out to be that I had indeed forgotten to remove the 
--with-system-libmpdec along with the library and header. Now _decimal compiles 
fine. I will see if I can get Python to run with my system's mpdecimal (once I 
have updated it), but as far as this issue is concerned I believe it is indeed 
closed. Thanks for the help!

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[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Stefan Krah]

Stefan Krah  added the comment:

I'm trying to reduce the number of open issues that I'm involved in.

If something concrete comes up, feel free to reopen.

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resolution:  -> works for me
stage:  -> resolved
status: open -> closed

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[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Stefan Krah]

Stefan Krah  added the comment:

Another source of error is of course if the external libmpdec was not compiled 
as "universal" but Python is.

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[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Stefan Krah]

Stefan Krah  added the comment:

It looks to me as if you are compiling --with-system-libmpdec.

You don't need that, libmpdec is included in the Python tarball.

-with-system-libmpdec was added mainly for Linux distros.  If there's a 
widespread interest to support it on OS X, I'd need a patch.



A hack that should work is "export PYTHON_DECIMAL_WITH_MACHINE=universal" 
during the Python build, then the external libmpdec *might* work.

This flag was mainly added for testing. Note that "universal" does not always 
build fat binaries -- it uses whatever Python is configured with.

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[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Hubert Holin]

Hubert Holin  added the comment:

This is correct: I had an older version of mpdecimal in /usr/local. However, 
when removed mpdecimal is (manually) removed from /usr/local (the libs and the 
header), making a "make clean", a config and make, the _decimal build still 
fails, but this time for a different reason:

/Developer/Python/3.6/Python/Python-3.6.5/Modules/_decimal/_decimal.c:34:10: 
fatal error: 'mpdecimal.h' file not found
#include "mpdecimal.h"

Still, we are getting closer: should I install a newer version of mpdecimal and 
try again?

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[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Ned Deily]

Ned Deily  added the comment:

> However, this is the first time in 6 years that anyone has reported an OS X 
> build failure.

Yes, I've never seen one before, either.

But I think the culprit is pointed to in the error message.  It looks like you 
have another version of mpdecimal in /usr/local/.

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[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Stefan Krah]

Stefan Krah  added the comment:

I don't have OS X. However, this is the first time in 6 years that anyone has 
reported an OS X build failure.

Perhaps Ned knows the answer.

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nosy: +ned.deily, skrah

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[issue33230] _decimal build failure (unsupported platform for that module) - evolution possible?

[Hubert Holin]

New submission from Hubert Holin :

_decimal fails to build on my platform due to lack of support:

In file included from 
/Developer/Python/3.6/Python/Python-3.6.5/Modules/_decimal/_decimal.c:34:
/usr/local/include/mpdecimal.h:201:4: error: "unsupported platform: need 
mpd_size_t == mpd_uint_t"
  #error "unsupported platform: need mpd_size_t == mpd_uint_t"

My host system type: x86_64-apple-darwin17.5.0
My target system type: x86_64-apple-darwin17.5.0
Compiler used: clang+llvm-6.0.0-x86_64-apple-darwin
Hardware: 3,7 GHz Quad-Core Intel Xeon E5

Relevant configurations:

--enable-universalsdk... 
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk

--with-universal-archs... intel

MACHDEP... darwin

Could this module be upgraded?

--
components: Extension Modules
messages: 314976
nosy: Hubert Holin
priority: normal
severity: normal
status: open
title: _decimal build failure (unsupported platform for that module) - 
evolution possible?
type: compile error
versions: Python 3.6

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