[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[miss-islington]

miss-islington  added the comment:


New changeset c046d6b6187e4de98a29e67ccbfd9b1b8790ee2f by Miss Islington (bot) 
in branch '3.7':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/c046d6b6187e4de98a29e67ccbfd9b1b8790ee2f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[miss-islington]

miss-islington  added the comment:


New changeset c046d6b6187e4de98a29e67ccbfd9b1b8790ee2f by Miss Islington (bot) 
in branch '3.7':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/c046d6b6187e4de98a29e67ccbfd9b1b8790ee2f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f by INADA Naoki (Matt 
McCormick) in branch '2.7':
bpo-11566: Remove hypot -> _hypot macro for very old compilers (GH-11283)
https://github.com/python/cpython/commit/000b8093a13f1c5bfe4b65a4dc1b23e0db553a8f


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

INADA Naoki  added the comment:


New changeset 87667c54c6650751c5d7bf7b9e465c8c4af45f71 by INADA Naoki (Matt 
McCormick) in branch 'master':
bpo-11566: Extension build errors on Windows for _hypot (GH-11283)
https://github.com/python/cpython/commit/87667c54c6650751c5d7bf7b9e465c8c4af45f71


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Matthew McCormick]

Change by Matthew McCormick :


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Kay Hayen]

Change by Kay Hayen :


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Matthew McCormick]

Matthew McCormick  added the comment:

> What current 3.x versions have this issue?  This issue was opened against 2.7.

Yes, this is just for 2.7.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Terry J. Reedy]

Terry J. Reedy  added the comment:

What current 3.x versions have this issue?  This issue was opened against 2.7.  
This was changed to 3.3 in 2013 (3.3 should have just been added with 
control-click).  I reverted to 2.7 and tentatively added 3.8, but this needs to 
be checked.

The PR is against 2.7, though not so marked in the title.  (I will fix this.)  
Since the move to GitHub, we usually fix on master first and then backport.

Something is not right with the PR 880 linkage.  For me, anyway, Steve's 
reference is actually linked to 10880 (closed).

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Steve Dower]

Steve Dower  added the comment:

The change in PR 880 looks fine to me. I dislike defining names without a Py 
prefix in public headers.

And PRs are not where we do general discussion or ping for attention. Make sure 
the nosy list includes the relevant experts (in this case probably me) and post 
on the issue. Posting on python-dev is also okay, though linking the bug is 
preferable to the PR.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[INADA Naoki]

Change by INADA Naoki :


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stage:  -> resolved
status: open -> closed
versions: +Python 3.7, Python 3.8

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Jeroen Demeyer]

Change by Jeroen Demeyer :


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Matthew McCormick]

Matthew McCormick added the comment:

I have created a pull request for this issue,

  https://github.com/python/cpython/pull/880

that addresses extension builds for both MinGWPy and the Microsoft Visual C++ 
Compiler for Python 2.7.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Matthew McCormick]

Changes by Matthew McCormick :


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Petri Lehtinen]

Changes by Petri Lehtinen :


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Pas]

Changes by Pas :


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Kay Hayen]

Kay Hayen added the comment:

This also affects Python2.7.12 on Windows with latest MinGW. I think something 
similar needs to be added for GCC version check:

/* VS 2010 and above already defines hypot as _hypot */
#if _MSC_VER < 1600
#define hypot _hypot
#endif

Not sure which gcc version first had that, but 6.1 definitely does.

Yours,
Kay

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[pokulo]

pokulo added the comment:

uning python 3.3 mingw4.8 both -std=gnu++0x and -std=c++11 cause still the same 
error.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Tim Golden]

Changes by Tim Golden m...@timgolden.me.uk:


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Václav Šmilauer]

Václav Šmilauer added the comment:

Martin, I know it is not a proper fix. OTOH, Python is not the only project 
which recommends its header be included as first.

I don't know if it is an issue for Python 3.x; will try to test that. This bug, 
though, is clearly reported about Python 2.7, which IS in bug-fix mode.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Martin v . Löwis]

Martin v. Löwis added the comment:

In general, including standard library headers before including Python.h is not 
recommended, since it may break binary compatibility across object files. So 
the proposed work-around may also cause harm.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Mark Dickinson]

Mark Dickinson added the comment:

Is this also an issue for Python 3.x?

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Mark Dickinson]

Changes by Mark Dickinson dicki...@gmail.com:


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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Mark Dickinson]

Mark Dickinson added the comment:

I think there's something generally smelly about the way hypot is handled;  
this isn't the only hypot-related build issue that's turned up.  I'm wondering 
whether the code can be reworked to deal with hypot in the same way that 
functions like log1p, etc. are dealt with in the math module---i.e., define a 
_Py_hypot wrapper function, and use that everywhere internally.  One difference 
is that log1p is only used in cmath and math, while hypot is also needed in the 
Python core.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Václav Šmilauer]

Václav Šmilauer added the comment:

Just for the record: a workaround (mentioned at 
http://boost.2283326.n4.nabble.com/Boost-Python-Compile-Error-s-GCC-via-MinGW-w64-td3165793.html#a3166760)
 is to always include cmath before Python.h.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Václav Šmilauer]

Václav Šmilauer added the comment:

I would like to second Ralf here. I am having the same issue with mingw's gcc 
4.7 and -std=c++11.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Petri Lehtinen]

Petri Lehtinen added the comment:

Cannot reproduce, and cannot find the define in pyconfig.h. It's in 
PC/pyconfig.h, but shouldn't affect compiling with gcc.

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status: open - pending

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Ralf Schmitt]

Ralf Schmitt added the comment:

Sorry, if I haven't been clear enough. This happens on windows when compiling 
extensions with g++ -std=gnu++0x ...

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Petri Lehtinen]

Petri Lehtinen added the comment:

On MinGW? I'm not a Windows user, but IIRC building extensions with gcc on 
MinGW has many problems and isn't officially supported.

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Ralf Schmitt]

Ralf Schmitt added the comment:

yes, mingw. it may have some problems and this is one of them!

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[issue11566] hypot define in pyconfig.h clashes with g++'s cmath

[Ralf Schmitt]

New submission from Ralf Schmitt sch...@gmail.com:

The following program

#include Python.h
#include cmath

results in the following error when compiled with g++ and -std=gnu++0x:

$ g++ -std=gnu++0x -c t.cc -I /c/Python27/Include
In file included from 
c:\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/4.5.1/include/c++/cmath:629:0,
 from t.cc:2:
c:\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/4.5.1/include/c++/tr1_impl/cmath:203:11:
 error: '::hypot' has not been declared

The problem is, that pyconfig.h has the following define:

#define hypot _hypot

It should probably just be removed when using gcc.

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messages: 131067
nosy: schmir
priority: normal
severity: normal
status: open
title: hypot define in pyconfig.h clashes with g++'s cmath
type: compile error
versions: Python 2.7

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