cmake HAVE_GMT examples

pnnl/SHAD src/runtime/CMakeLists.txt :20 

elseif (HAVE_GMT)

pnnl/SHAD src/runtime/CMakeLists.txt :74 

elseif (HAVE_GMT)

pnnl/SHAD src/runtime/CMakeLists.txt :76 

target_compile_definitions(runtime PUBLIC HAVE_GMT=1)