[C++-sig] Problem building boost.python for Cygwin

[Marc Paterno]

I have been attempting to build boost.python on Cygwin, and have
encountered trouble. I hope that someone may be able to diagnose my
problem.

I am using
 Windows 2000 SP3
 Cygwin v1.3.20-1
 GCC 3.2 20020927 (prerelease)
 python 2.2.2 (on Cygwin)
 bjam 3.1.3 for Cygwin


I am performing all builds from a Cygwin (bash) shell.

I have been able to build the thread, signals, and regex libraries, so
I am fairly sure that bjam and gcc are working properly. However, when
I attempt to build boost.python, the build fails.

Specifically, it seems that proper object files get built, in the
directory
  libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/
   runtime-link-dynamic/shared-linkable-true/

(I split the directory name over two lines for readability; the name is
not really split.)

However, it seems that building of the dynamic library fails. Here is the
output from running bjam a second time, after the .o files had been
successfully built.

----------
$> bjam -sTOOLS=gcc -sBUILD=release
...patience...
...found 903 targets...
...updating 2 targets...
gcc-Link-action
../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/ru
ntime-link-dynamic/shared-linkable-true/libboost_python.so
../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/ru
ntime-link-dynamic/shared-linkable-true/numeric.o(.text+x320):numeric.cpp:
undefined reference to `_PyExc_ImportError'
../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/ru
ntime-link-dynamic/shared-linkable-true/numeric.o(.text+x33d):numeric.cpp:
undefined reference to `_PyErr_Format'

 ... about 700 similar lines removed ...

../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/ru
ntime-link-dynamic/shared-linkable-true/object_operators.o(.text+x93f):objec
t_operators.cpp: undefined reference to `_PyNumber_InPlaceXor'
../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/ru
ntime-link-dynamic/shared-linkable-true/object_operators.o(.text+x9ff):objec
t_operators.cpp: undefined reference to `_PyNumber_InPlaceOr'
collect2: ld returned 1 exit status

    export LD_LIBRARY_PATH
    g++   -s -fPIC -shared  -o
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/libboost_python.so"  -L"/usr/lib/py
thon2.2/config"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/numeric.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/list.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/long.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/dict.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/tuple.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/str.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/aix_init_module.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/from_python.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/registry.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/type_id.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/enum.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/class.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/function.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/inheritance.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/life_support.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/pickle_support.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/errors.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/module.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/builtin_converters.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/arg_to_python_base.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/iterator.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/object_protocol.o"
"../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/r
untime-link-dynamic/shared-linkable-true/object_operators.o"

...failed gcc-Link-action
../../../libs/python/build/bin/libboost_python.so/gcc/release/inlining-on/ru
ntime-link-dynamic/shared-linkable-true/libboost_python.so...
...skipped <!libs!python!build!bin-stage>libboost_python.so for lack of
<libs!python!build/libboost_python.so/gcc/release/inlining-on/runtime-link-d
ynamic/shared-linkable-true>libboost_python.so...
...failed updating 1 target...
...skipped 1 target...

----------------------------------


Here are what I understand are the relevant environment variable
settings I have established:
   PYTHON_ROOT=/usr/lib/python2.2
   PYTHON_INCLUDES=/usr/include/python2.2
   PYTHON_LIB_PATH=/usr/lib/python2.2/config
   PYTHON_STDLIB_PATH=/usr/lib/python2.2
   PYTHON_VERSION=2.2

I am least sure about PYTHON_ROOT and PYTHON_LIB_PATH:
  PYTHON_ROOT is defined such that ${PYTHON_ROOT}/bin/python.exe is
     the full path to the Python executable;
  PYTHON_LIB_PATH is defined such that ${PYTHON_LIB_PATH}/libpython2.2.dll.a
     is the full path to the Python library supplied as a Cygwin 'package'.

I suspect I have one (or more) of these defined wrongly, but haven't been
able to find the right setting to make things go.

Suggestions would be most welcome.

best regards,
Marc