[Numpy-discussion] Compile error during 32 bit compile on 64 bit machine

Brian forand@gmail....
Mon Nov 3 15:10:13 CST 2008


Greeting,


I am trying to install numpy on the same system into to different  
prefixes, one dedicated to 32 bit stuff and the other to 64 bit.  The  
machine is a dual CPU Core 2 Duo machine, that is a 64 bit native  
machine.  Getting the 64 bit version to work is no problem.  But cross  
compiling numpy for 32 bit binaries is very troublesome.  I have  
compiled all the dependences using "-m32" including Python itself.   
All my other packages compile using the -m32 flag without problems.    
I have set CFLAGS, LDFLAGS, BASECFLAGS, CPPFLAGS, and CXXFLAGS all to  
reflect the change in bits to use.  Please find below the error I  
receive when compiling with: python setup.py build --fcompiler=gnu95.   
The error appears to be because it is trying to link _configtest.o  
without the -m32 flag and thinks it is making a 64 bit binary.  If I  
edit line 378 of ccompiler.py to add "-m32" to the link_opts by hand I  
can get past this error to a new one which indicates that main was  
never declared in the linalg package.  If that is the more useful  
starting point I can post those errors as well.

Any help would be greatly appreciated.

Regards,
Brian


############### ERROR BELOW #####################
C compiler: gcc -pthread -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict- 
prototypes -m32 -m32 -fPIC

compile options: '-I/rh5stuff/32bit/include/python2.6 -Inumpy/core/src  
-Inumpy/core/include -I/rh5stuff/32bit/include/python2.6 -c'
gcc: _configtest.c
gcc -pthread _configtest.o -L/rh5stuff/32bit/lib -L/usr/local/lib -L/ 
usr/lib -o _configtest
/usr/bin/ld: skipping incompatible /usr/lib/libpthread.so when  
searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/libpthread.a when  
searching for -lpthread
/usr/bin/ld: skipping incompatible /usr/lib/libc.so when searching for  
-lc
/usr/bin/ld: skipping incompatible /usr/lib/libc.a when searching for - 
lc
/usr/bin/ld: warning: i386 architecture of input file `_configtest.o'  
is incompatible with i386:x86-64 output
_configtest
failure.
removing: _configtest.c _configtest.o _configtest





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