[Numpy-discussion] building 32 bit numpy on 64 bit linux

David Jones david.jones74 at gmail.com
Thu Dec 12 13:58:39 EST 2013

I'm trying to compile 32-bit numpy on a 64 bit Centos 6 system, but fails with the message:

"Broken toolchain: cannot link a simple C program"

It get's the compile flags right, but not the linker:

C compiler: gcc -pthread -fno-strict-aliasing -g -O2 -m32 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC
compile options: '-Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -Inumpy/core/include -I/opt/python/ia32/include/python2.7 -c'
gcc: _configtest.c
gcc -pthread _configtest.o -o _configtest
_configtest.o: could not read symbols: File in wrong format
collect2: ld returned 1 exit status

I'm bulding it using a 32bit python build that I compiled on the same system.

I tried:

   OPT="-m32" FOPT="-m32" python setup.py build


   setarch x86_64 -B python setup.py build

But with the same results.

Someone worked around this by altering ccompiler.py, but I'm trying to find a cleaner solution.


Is there a standard way of doing this?

David J.

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