CMake-error: The "debug" argument must be followed by a library.

[thorstink]

Hi,

Maybe not a bug (yet) but a compatibility issue:

Description

Using the current master (342f30d), running cmake .. from a build-folder, using Ubuntu 20.04 and CMake version 3.16.3 results in:
note: I also tried with the latest release tag 4.0.2, same issue.

Environment

Ubuntu 20.04,
CMake version 3.16.3
Boost 1.71
Happens with master and v4.0.2

Additional information

11:32 $ cmake ..
-- GTSAM_SOURCE_ROOT_DIR: [/home/thomas/Libraries/gtsam]
-- GTSAM_BOOST_LIBRARIES: optimized;/usr/lib/x86_64-linux-gnu/libboost_serialization.so.1.71.0;optimized;/usr/lib/x86_64-linux-gnu/libboost_system.so.1.71.0;optimized;/usr/lib/x86_64-linux-gnu/libboost_filesystem.so.1.71.0;optimized;/usr/lib/x86_64-linux-gnu/libboost_thread.so.1.71.0;optimized;/usr/lib/x86_64-linux-gnu/libboost_date_time.so.1.71.0;optimized;/usr/lib/x86_64-linux-gnu/libboost_regex.so.1.71.0;debug;debug;debug;debug;debug;debug
-- Could NOT find MKL (missing: MKL_INCLUDE_DIR MKL_LIBRARIES) 
-- Found Eigen version: 3.3.7
CMake Error at wrap/CMakeLists.txt:32 (target_link_libraries):
  The "debug" argument must be followed by a library.


-- Configuring incomplete, errors occurred!
See also "/home/thomas/Libraries/gtsam/build/CMakeFiles/CMakeOutput.log".
See also "/home/thomas/Libraries/gtsam/build/CMakeFiles/CMakeError.log".

i tried the trick mentioned here: https://stackoverflow.com/a/39663388, which allows cmake to configure (after changing debug to libdebug.so in several cmakelists.txt).. But however fails on compiling:

...
Scanning dependencies of target wrap
[ 10%] Building CXX object wrap/CMakeFiles/wrap.dir/wrap.cpp.o
[ 10%] Linking CXX executable wrap
/usr/bin/ld: cannot find -ldebug
collect2: error: ld returned 1 exit status
make[2]: *** [wrap/CMakeFiles/wrap.dir/build.make:88: wrap/wrap] Error 1
make[1]: *** [CMakeFiles/Makefile2:3108: wrap/CMakeFiles/wrap.dir/all] Error 2
make: *** [Makefile:163: all] Error 2

but makes sense as the approach feels kind of hacky.

I'm not a cmake-wizard, but maybe @jlblancoc can give some guidance for a desired solution (if agreed this is a bug/want to fix thing) and I can put on a pull request.

[thorstink]

related to #145 I guess..

[thorstink]

False alarm.

Gitflow mistake here.. develop is not master. Master doesn't have the cmake-fix, develop does.