Re: [Xen-devel] [PATCH v3] autoconf: fix python-dev detection on old python versions [and 1 more messages]

[Olaf Hering <olaf@xxxxxxxxx>]

On Tue, Apr 03, Ian Jackson wrote:

> Roger Pau Monne writes ("[Xen-devel] [PATCH v3] autoconf: fix python-dev 
> detection on old python versions"):
> > Replaced the use of python-config (that is only present in Python >= 2.5.x)
> > with the distutils python module.
> 
> Committed-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>

I think this is the cause for a regression between changeset 25138 and
25161 in openSuSE 11.4, 12.1 and upcoming 12.2. SLES11 still builds
fine:

...
configure:6205: checking for Python.h
configure:6205: result: yes
configure:6214: checking for PyArg_ParseTuple in -lpython2.7
configure:6239: gcc -o conftest  -g -O2   -g -O2  -I/usr/include/python2.7 
-fno-strict-aliasing -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 
-fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -DNDEBUG 
-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector 
-funwind-tables -fasynchronous-unwind-tables -g    -lpthread -ldl  -lutil -lm 
-L/usr/lib64/python2.7/config -Xlinker -export-dynamic  conftest.c -lpython2.7  
 >&5
/usr/lib64/python2.7/config/libpython2.7.a(longobject.o): In function 
`PyLong_FromString':
/home/abuild/rpmbuild/BUILD/Python-2.7.2/Objects/longobject.c:1851: undefined 
reference to `log'
/usr/lib64/python2.7/config/libpython2.7.a(signalmodule.o): In function 
`timeval_from_double':
/home/abuild/rpmbuild/BUILD/Python-2.7.2/./Modules/signalmodule.c:112: 
undefined reference to `floor'
/home/abuild/rpmbuild/BUILD/Python-2.7.2/./Modules/signalmodule.c:113: 
undefined reference to `fmod'
/home/abuild/rpmbuild/BUILD/Python-2.7.2/./Modules/signalmodule.c:112: 
undefined reference to `floor'
/home/abuild/rpmbuild/BUILD/Python-2.7.2/./Modules/signalmodule.c:113: 
undefined reference to `fmod'
/usr/lib64/python2.7/config/libpython2.7.a(complexobject.o): In function 
`_Py_c_pow':
/home/abuild/rpmbuild/BUILD/Python-2.7.2/Objects/complexobject.c:139: undefined 
reference to `hypot'
/home/abuild/rpmbuild/BUILD/Python-2.7.2/Objects/complexobject.c:140: undefined 
reference to `pow'
/home/abuild/rpmbuild/BUILD/Python-2.7.2/Objects/complexobject.c:141: undefined 
reference to `atan2'
/home/abuild/rpmbuild/BUILD/Python-2.7.2/Objects/complexobject.c:145: undefined 
reference to `sincos'
...


I havent followed the discussion about the python detection. My
immediate reaction would be to use python-config when available.
This is what I get in the build chroot:

 python-config --cflags
 -I/usr/include/python2.7 -I/usr/include/python2.7 -fno-strict-aliasing
 -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector
 -funwind-tables -fasynchronous-unwind-tables -g -DNDEBUG
 -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector
 -funwind-tables -fasynchronous-unwind-tables -g

 python-config --ldflags
 -lpthread -ldl -lutil -lm -lpython2.7 -Xlinker -export-dynamic

 python-config --libs
 -lpthread -ldl -lutil -lm -lpython2.7

 python-config --includes
 -I/usr/include/python2.7 -I/usr/include/python2.7


Olaf

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