I've deduced that there are things known about this issue, or a related issue, as I saw similar discussion here
http://lists.gnu.org/archive/html/discuss-gnuradio/2005-05/msg00148.html However, I provide what I believe may be related detail and reproducibility that may be helpful. In the course of building (not running) gnuradio-core from CVS, I encounter an unresolved symbol issue related to a static libpython library in Python 2.3.5. 1. My environment: Gentoo Linux 2005.0 Linux cq 2.6.11-gentoo-r11 #2 Thu Jun 16 17:29:09 PDT 2005 i686 Pentium III (Coppermine) GenuineIntel GNU/Linux gcc v3.4.4 autoconf v2.59 automake v1.9.5 libtool v1.5.16 swig v1.3.25 python v2.3.5 pkg-config v0.15.0 2. Python 2.3.5 built from source with --enable-shared and linked with -export-dynamic produces the following libraries $ find /usr/lib -name libpython\* |xargs ls -l lrwxrwxrwx 1 root root 19 Jun 20 13:06 /usr/lib/libpython2.3.so -> libpython2.3.so.1.0 -r-xr-xr-x 1 root root 944568 Jun 20 13:06 /usr/lib/libpython2.3.so.1.0 -rw-r--r-- 1 root root 1479196 Jun 20 13:06 /usr/lib/python2.3/config/libpython2.3.a 3. via the invocation of "buildit" on gnuradio-core/, we get ./bootstrap && ./configure --enable-maintainer-mode which drives the execution of gr-build/gnuradio-core/config/gr_python.m4. gr_python.m4 has in its PYTHON_DEVEL macro (see in gr_python.m4 "# Check for Python headers usability") a loop that searches for libpython$PYTHON_VERSION.*. The loop list for i in "$python_path/lib/python$PYTHON_VERSION/" "$python_path/lib/python$PYTHON_VERSION/config/" "$python_pat h/lib/python/config/" "$python_path/lib/python/" "$python_path/" "$python_path/libs" is ordered in such a way that /usr/lib/python2.3/config/libpython2.3.a is found before /usr/lib/libpython2.3.so. As a result, the python dev lib test program as seen in gnuradio-core/config.log gcc -o conftest -g -O2 -Wall -I/usr/include/python2.3 conftest.c -L/usr/lib/python2.3/config -lpython2 .3 -lpthread -ldl -lutil >&5 does not succeed in linking because libpython2.3.a has unresolved math symbols. For example, from config.log /usr/lib/python2.3/config/libpython2.3.a(complexobject.o)(.text+0x2fe): In function `_Py_c_pow': : undefined reference to `hypot' where $ nm /usr/lib/python2.3/config/libpython2.3.a |grep hypot U hypot 4. From my narrow perspective, I can "fix" this problem by moving "$python_path/" to the front of the "for" loop in gr_python.m4, such that /usr/lib/libpython2.3.so is found before the static lib version /usr/lib/python2.3/config/libpython2.3.a. Doing so allows the test program to link to the .so version of the library, which results in a successful linking of the test program. Or, one can fix by linking the test program to libm, but that doesn't sound right. Mark _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
