diff --git a/clang/tools/clang-linker-wrapper/CMakeLists.txt b/clang/tools/clang-linker-wrapper/CMakeLists.txt
--- a/clang/tools/clang-linker-wrapper/CMakeLists.txt
+++ b/clang/tools/clang-linker-wrapper/CMakeLists.txt
@@ -1,3 +1,5 @@
+include(GNUInstallDirs)
+
 set(LLVM_LINK_COMPONENTS 
   ${LLVM_TARGETS_TO_BUILD}
   BitWriter
@@ -42,4 +44,4 @@
   ${CLANG_LINKER_WRAPPER_LIB_DEPS}
   )
 
-install(TARGETS clang-linker-wrapper RUNTIME DESTINATION bin)
+install(TARGETS clang-linker-wrapper RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
diff --git a/llvm-libgcc/lib/CMakeLists.txt b/llvm-libgcc/lib/CMakeLists.txt
--- a/llvm-libgcc/lib/CMakeLists.txt
+++ b/llvm-libgcc/lib/CMakeLists.txt
@@ -1,5 +1,6 @@
 include(CheckLibraryExists)
 include(GNUInstallDirs)
+include(ExtendPath)
 
 string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
 
@@ -41,13 +42,13 @@
   c
 )
 
-get_filename_component(LLVM_LIBGCC_LIBUNWIND_STATIC_ROOT "${CMAKE_INSTALL_PREFIX}/${LIBUNWIND_INSTALL_LIBRARY_DIR}" ABSOLUTE)
+extend_path(LLVM_LIBGCC_LIBUNWIND_STATIC_ROOT "${CMAKE_INSTALL_PREFIX}" "${LIBUNWIND_INSTALL_LIBRARY_DIR}")
 #string(REPLACE "${CMAKE_INSTALL_FULL_LIBDIR}/" "" LLVM_LIBGCC_LIBUNWIND_STATIC_ROOT "${LLVM_LIBGCC_LIBUNWIND_STATIC_ROOT}")
 
 install(TARGETS libgcc_s
         LIBRARY DESTINATION "${LLVM_LIBGCC_LIBUNWIND_STATIC_ROOT}" COMPONENT unwind
         ARCHIVE DESTINATION "${LLVM_LIBGCC_LIBUNWIND_STATIC_ROOT}" COMPONENT unwind
-        RUNTIME DESTINATION bin COMPONENT unwind)
+        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT unwind)
 
 get_compiler_rt_install_dir(${LLVM_LIBGCC_TARGET_ARCH} install_dir_builtins)
 string(REGEX REPLACE "^lib/" "" install_dir_builtins "${install_dir_builtins}")
diff --git a/llvm/cmake/modules/CMakeLists.txt b/llvm/cmake/modules/CMakeLists.txt
--- a/llvm/cmake/modules/CMakeLists.txt
+++ b/llvm/cmake/modules/CMakeLists.txt
@@ -137,6 +137,7 @@
 
 set(LLVM_CONFIG_BINARY_DIR "\${LLVM_INSTALL_PREFIX}")
 extend_path(LLVM_CONFIG_CMAKE_DIR "\${LLVM_INSTALL_PREFIX}" "${LLVM_INSTALL_PACKAGE_DIR}")
+extend_path(LLVM_CONFIG_TOOLS_BINARY_DIR "\${LLVM_INSTALL_PREFIX}" "${LLVM_TOOLS_INSTALL_DIR}")
 
 # Generate a default location for lit
 if (LLVM_INSTALL_UTILS AND LLVM_BUILD_UTILS)
diff --git a/openmp/CMakeLists.txt b/openmp/CMakeLists.txt
--- a/openmp/CMakeLists.txt
+++ b/openmp/CMakeLists.txt
@@ -1,7 +1,12 @@
 cmake_minimum_required(VERSION 3.13.4)
 
-# Add cmake directory to search for custom cmake functions.
-set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
+set(LLVM_COMMON_CMAKE_UTILS ${CMAKE_CURRENT_SOURCE_DIR}/../cmake)
+
+# Add path for custom modules
+list(INSERT CMAKE_MODULE_PATH 0
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
+  "${LLVM_COMMON_CMAKE_UTILS}/Modules"
+  )
 
 # llvm/runtimes/ will set OPENMP_STANDALONE_BUILD.
 if (OPENMP_STANDALONE_BUILD OR "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
diff --git a/openmp/runtime/src/CMakeLists.txt b/openmp/runtime/src/CMakeLists.txt
--- a/openmp/runtime/src/CMakeLists.txt
+++ b/openmp/runtime/src/CMakeLists.txt
@@ -8,6 +8,8 @@
 #//===----------------------------------------------------------------------===//
 #
 
+include(ExtendPath)
+
 # Configure omp.h, kmp_config.h and omp-tools.h if necessary
 configure_file(${LIBOMP_INC_DIR}/omp.h.var omp.h @ONLY)
 configure_file(kmp_config.h.cmake kmp_config.h @ONLY)
@@ -347,8 +349,8 @@
 add_dependencies(libomp-micro-tests libomp-test-deps)
 
 # Install rules
-# We want to install libomp in DESTDIR/CMAKE_INSTALL_PREFIX/lib
-# We want to install headers in DESTDIR/CMAKE_INSTALL_PREFIX/include
+# We want to install libomp in ${DESTDIR}/${CMAKE_INSTALL_FULL_LIBDIR}
+# We want to install headers in ${DESTDIR}/${CMAKE_INSTALL_FULL_INCLUDEDIR}
 if(${OPENMP_STANDALONE_BUILD})
   set(LIBOMP_HEADERS_INSTALL_PATH "${CMAKE_INSTALL_INCLUDEDIR}")
 else()
@@ -362,9 +364,10 @@
   set(LIBOMP_ALIASES "libiomp5md")
   foreach(alias IN LISTS LIBOMP_ALIASES)
     install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy \"${LIBOMP_LIB_FILE}\"
-      \"${alias}${LIBOMP_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}\")")
+      \"${alias}${LIBOMP_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"${CMAKE_INSTALL_FULL_BINDIR}\")")
+    extend_path(outdir "${CMAKE_INSTALL_PREFIX}" "${OPENMP_INSTALL_LIBDIR}")
     install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy \"${LIBOMP_IMP_LIB_FILE}\"
-      \"${alias}${CMAKE_STATIC_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"\${CMAKE_INSTALL_PREFIX}/${OPENMP_INSTALL_LIBDIR}\")")
+      \"${alias}${CMAKE_STATIC_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"${outdir}\")")
   endforeach()
 else()
 
@@ -374,9 +377,10 @@
     # Create aliases (symlinks) of the library for backwards compatibility
     set(LIBOMP_ALIASES "libgomp;libiomp5")
     foreach(alias IN LISTS LIBOMP_ALIASES)
+      extend_path(outdir "${CMAKE_INSTALL_PREFIX}" "${OPENMP_INSTALL_LIBDIR}")
       install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E create_symlink \"${LIBOMP_LIB_FILE}\"
         \"${alias}${LIBOMP_LIBRARY_SUFFIX}\" WORKING_DIRECTORY
-        \"\$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${OPENMP_INSTALL_LIBDIR}\")")
+        \"\$ENV{DESTDIR}\${outdir}\")")
     endforeach()
   endif()
 endif()