[CMake] can't link against multiply dependent static libraries with CHECK_LIBRARY_EXISTS

[Philip Lowman]

Hi,

I'm using CMake 2.4.6.  I'm trying to use CHECK_LIBRARY_EXISTS to verify 
a function exists in a static library that requires additional static 
libraries to be linked against in order for main() to link.

libctdb depends in part on libgcs, libgtrs, and libvecmat (which need to 
be linked in that order).

SET(CMAKE_REQUIRED_LIBRARIES "libctdb.a;libgcs.a;libgtrs.a;libvecmat.a")
CHECK_LIBRARY_EXISTS(ctdb ctdb_lookup_attr_name 
${PROJECT_SOURCE_DIR}/Ctdbase/otb/lib HAVE_CTDB)

I get the following error message in CMakeFiles/CMakeError.log:

/usr/bin/gcc      -DCHECK_FUNCTION_EXISTS=ctdb_lookup_attr_name  -fPIC 
"CMakeFiles/cmTryCompileExec.dir/usr/local/cmake/share/cmake-2.4/Modules/CheckFunctionExists.o" 
   -o cmTryCompileExec -rdynamic 
-L/home/lowmanp/src/gres.cmake/Ctdbase/otb/lib -lctdb -Wl,-Bstatic 
-lctdb -lgcs -lgtrs -lvecmat -Wl,-Bdynamic 
-Wl,-rpath,/home/lowmanp/src/gres.cmake/Ctdbase/otb/lib

I can link a simple main() .c file of my own choosing using this gcc 
line and it works just fine.

g++ -I/home/lowmanp/src/gres.cmake/Ctdbase/otb 
-I/home/lowmanp/src/gres.cmake/Ctdbase/otb/include 
-I/home/lowmanp/src/gres.cmake/Ctdbase/otb/include/global 
-I/home/lowmanp/src/gres.cmake/Ctdbase/otb/include/libinc crap.c 
-L/home/lowmanp/src/gres.cmake/Ctdbase/otb/lib -lctdb -lgcs -lgtrs 
-lvecmat -o crap

-- 
Philip Lowman
Simulation Development Engineer, Modeling and Simulation Technology
General Dynamics Land Systems
http://www.gdls.com