[OpenMP][libomptarget] amdgpu plugin adds runpath for dependencies

[ye-luo]

Summary

amdgpu plugin depends on libhsa-runtime64 library. Add runpath in case it is not on the LD_LIBRARY_PATH.

[JonChesterfield]

This presumably breaks using dlopen from next to the plugin in favour of unbreaking using the rocr cmake found. I think that's a net win.

openmp/libomptarget/plugins/amdgpu/CMakeLists.txt

add_library(omptarget.rtl.amdgpu SHARED
       impl/msgpack.cpp
       src/rtl.cpp
       ${LIBOMPTARGET_EXTRA_SOURCE}
       )
 
 # Install plugin under the lib destination folder.
 # When we build for debug, OPENMP_LIBDIR_SUFFIX get set to -debug
 install(TARGETS omptarget.rtl.amdgpu LIBRARY DESTINATION "lib${OPENMP_LIBDIR_SUFFIX}")
+set_property(TARGET omptarget.rtl.amdgpu PROPERTY INSTALL_RPATH_USE_LINK_PATH ON)
 
 if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
   # On FreeBSD, the 'environ' symbol is undefined at link time, but resolved by
   # the dynamic linker at runtime. Therefore, allow the symbol to be undefined
   # when creating a shared library.
   set(LDFLAGS_UNDEFINED "-Wl,--allow-shlib-undefined")
 else()
   set(LDFLAGS_UNDEFINED "-Wl,-z,defs")
 endif()
 
-set_property(TARGET omptarget.rtl.amdgpu PROPERTY INSTALL_RPATH "$ORIGIN")
 target_link_libraries(
   omptarget.rtl.amdgpu
   PRIVATE
   elf_common
   ${LIBOMPTARGET_DEP_LIBRARIES}
   ${CMAKE_DL_LIBS}
   ${LIBOMPTARGET_DEP_LIBELF_LIBRARIES}
   ${OPENMP_PTHREAD_LIB}