[BUILD] Add link to libdl for RCCL-Tests builds (ROCm#153)

Author: nileshnegi

src/CMakeLists.txt

@@ -127,7 +127,7 @@ add_custom_target(git_version_check
 add_custom_target(hipify DEPENDS ${HIP_COMMON_SOURCES})
 add_library(rccl_common OBJECT ${HIP_COMMON_SOURCES})
 add_dependencies(rccl_common hipify git_version_check)
-target_link_libraries(rccl_common roc::rccl hip::device Threads::Threads)
+target_link_libraries(rccl_common roc::rccl hip::device Threads::Threads dl)
 if(USE_MPI)
   target_link_libraries(rccl_common MPI::MPI_CXX)
 endif()

src/Makefile

@@ -129,7 +129,7 @@ HIPCUFLAGS += -DMPI_SUPPORT -I${MPI_HOME}/include -I${MPI_HOME}/mpich/include -I
 HIPLDFLAGS += -L${MPI_HOME}/lib -L${MPI_HOME}/mpich/lib -lmpich
 endif
 
-LIBRARIES += rccl
+LIBRARIES += rccl dl
 HIPLDFLAGS += $(LIBRARIES:%=-l%)
 
 DST_DIR := $(BUILDDIR)