OSX, non-default boost: libutil.so: undefined references

[Karl Sackett]

Debian Linux 7.0
OpenCog revision 7684
Boost 1.51.0

I manually installed Boost 1.51.0 since the default version for Debian 7.0 is still 1.49.0.
Cmake picked up the new libraries when I reran it:

-- Boost version: 1.51.0
-- Found the following Boost libraries:
-- date_time
-- filesystem
-- regex
-- serialization
-- signals
-- system
-- thread
-- Found Boost::program_options
-- Found Boost::math

But here's the build output:

Scanning dependencies of target util
[ 0%] Building CXX object opencog/util/CMakeFiles/util.dir/lazy_selector.cc.o
[ 0%] Building CXX object opencog/util/CMakeFiles/util.dir/log_prog_name.cc.o
[ 0%] Building CXX object opencog/util/CMakeFiles/util.dir/mt19937ar.cc.o
[ 0%] Building CXX object opencog/util/CMakeFiles/util.dir/StringManipulator.cc.o
Linking CXX shared library libutil.so
[ 3%] Built target util
 ...
[ 12%] Building CXX object opencog/comboreduct/main/CMakeFiles/action-reductor.dir/action-reductor.cc.o
Linking CXX executable action-reductor
../../util/libutil.so: undefined reference to `boost::filesystem::path::operator/=(char const*)'
../../util/libutil.so: undefined reference to `boost::filesystem::detail::status(boost::filesystem::path const&, boost::system::error_code*)'
collect2: error: ld returned 1 exit status
make[2]: *** [opencog/comboreduct/main/action-reductor] Error 1
make[1]: *** [opencog/comboreduct/main/CMakeFiles/action-reductor.dir/all] Error 2
make: *** [all] Error 2

[linas (linasvepstas)]

I'm stumped. The CMakefile for utils explicitly calls out

TARGET_LINK_LIBRARIES(util
   ${Boost_FILESYSTEM_LIBRARY}
   ${Boost_SYSTEM_LIBRARY}
   ${Boost_REGEX_LIBRARY}
   ${Boost_THREAD_LIBRARY}
)

 What was wrong with boost-1.49 ??

I'm guessnig that you didn't re-run cmake after install 1.51 and/or cmake is still finding a partially installed older boost. You can verify teh paths used by saying

make VERBOSE=1

and looking where the libraries are being searched.

[Karl Sackett (karlsackett)]

This problem was under Debian Linux, not OSX.

Since I'm building OpenCog on two different machines I wanted to use the
sames libraries on both to check one build against the other. It seemed like a
good idea at the time, but with both Boost-1.49 and 1.51 on my Debian box
it's hard to tell what parts of which one are being pulled in to the build.

'make VERBOSE=1' didn't reveal anything useful, so I've removed all the 1.51 files
from my Debian workstation and returned to Boost-1.49.

You can go ahead and close this bug.

[David Hart (dhart)]

Check the cmake output to see which version of boost it chooses - it's likely possible to force it to choose from a range (e.g. 1.46-1.48).