[libomptarget] Build amdgcn devicertl by default

[libomptarget] Build amdgcn devicertl by default

The cmake for this looks for an llvm install and does the right thing when
building as part of enable_runtimes. It will probably do the right thing
in other settings - at least, it won't try to build this with gcc.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D98658

GitOrigin-RevId: e23f3502d9a2b1e9abd445130a22cc00f6464da8
diff --git a/libomptarget/deviceRTLs/CMakeLists.txt b/libomptarget/deviceRTLs/CMakeLists.txt
index 3df94ea..8bbf987 100644
--- a/libomptarget/deviceRTLs/CMakeLists.txt
+++ b/libomptarget/deviceRTLs/CMakeLists.txt
@@ -10,4 +10,5 @@
 #
 ##===----------------------------------------------------------------------===##
 
+add_subdirectory(amdgcn)
 add_subdirectory(nvptx)
diff --git a/libomptarget/deviceRTLs/amdgcn/CMakeLists.txt b/libomptarget/deviceRTLs/amdgcn/CMakeLists.txt
index 8ba0572..361e052 100644
--- a/libomptarget/deviceRTLs/amdgcn/CMakeLists.txt
+++ b/libomptarget/deviceRTLs/amdgcn/CMakeLists.txt
@@ -154,6 +154,6 @@
   add_custom_target(lib${libname}-${mcpu} ALL DEPENDS ${bc_libname})
 
   install(FILES ${OUTPUTDIR}/${bc_libname}
-     DESTINATION "${OPENMP_INSTALL_LIBDIR}/libdevice"
+     DESTINATION "${OPENMP_INSTALL_LIBDIR}"
   )
 endforeach()