CMake build does not install realm_gex_wrapper_objs

[elliottslaughter]

Building any application against a Legion installation built with CMake fails to link because realm_gex_wrapper_objs is missing.

To reproduce (I'm running this on Sapling, though any machine with Infiniband should work):

git clone [email protected]:StanfordLegion/legion.git legion-build-test
cd legion-build-test
mkdir build
cd build
cmake .. -DLegion_NETWORKS=gasnetex -DLegion_EMBED_GASNet=ON -DGASNet_CONDUIT=ibv -DCMAKE_INSTALL_PREFIX=$PWD/../install
make install -j20
cd ../examples/circuit
mkdir build
cd build
CMAKE_PREFIX_PATH=$PWD/../../../install cmake .. -DCMAKE_CXX_STANDARD=17
make -j20

Results in:

[100%] Linking CXX executable circuit
/usr/bin/ld: cannot find -lrealm_gex_wrapper_objs

Verbose output:

[ 20%] Linking CXX executable circuit
/usr/local/cmake-3.26.3/bin/cmake -E cmake_link_script CMakeFiles/circuit.dir/link.txt --verbose=1
/usr/bin/c++ -Wl,--export-dynamic -rdynamic CMakeFiles/circuit.dir/circuit.cc.o CMakeFiles/circuit.dir/circuit_cpu.cc.o CMakeFiles/circuit.dir/circuit_init.cc.o CMakeFiles/circuit.dir/circuit_mapper.cc.o -o circuit  /scratch/eslaught/legion-build-test/install/lib/liblegion.a /scratch/eslaught/legion-build-test/install/lib/librealm.a -ldl -lpthread -lrt -lrealm_gex_wrapper_objs /usr/lib/x86_64-linux-gnu/libz.so -latomic 
/usr/bin/ld: cannot find -lrealm_gex_wrapper_objs
collect2: error: ld returned 1 exit status

Contents of install/lib:

$ ls lib/
liblegion.a  librealm.a

[muraj]

Hmm... realm_gex_wrapper_objs is an object library, it shouldn't be added to the linker line... Taking a look.