diff --git a/clang/tools/scan-build/CMakeLists.txt b/clang/tools/scan-build/CMakeLists.txt
index 74334e53c9b1..ec0702d76f18 100644
--- a/clang/tools/scan-build/CMakeLists.txt
+++ b/clang/tools/scan-build/CMakeLists.txt
@@ -66,16 +66,16 @@ if(CLANG_INSTALL_SCANBUILD)
   endforeach()
 
   foreach(ManPage ${ManPages})
-    add_custom_command(OUTPUT "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1/${ManPage}"
+    add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1/${ManPage}
                        COMMAND ${CMAKE_COMMAND} -E make_directory
-                         "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1"
+                         ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1
                        COMMAND ${CMAKE_COMMAND} -E copy
-                         "${CMAKE_CURRENT_SOURCE_DIR}/man/${ManPage}"
-                         "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1/"
+                         ${CMAKE_CURRENT_SOURCE_DIR}/man/${ManPage}
+                         ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1/
                        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/man/${ManPage})
-    list(APPEND Depends "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1/${ManPage}")
+    list(APPEND Depends ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_MANDIR}/man1/${ManPage})
     install(PROGRAMS man/${ManPage}
-            DESTINATION "${CMAKE_INSTALL_MANDIR}/man1"
+            DESTINATION ${CMAKE_INSTALL_MANDIR}/man1
             COMPONENT scan-build)
   endforeach()
 
diff --git a/libclc/CMakeLists.txt b/libclc/CMakeLists.txt
index e90e0fd85201..ec39ea63f2d0 100644
--- a/libclc/CMakeLists.txt
+++ b/libclc/CMakeLists.txt
@@ -183,8 +183,8 @@ endif()
 
 # pkg-config file
 configure_file( libclc.pc.in libclc.pc @ONLY )
-install( FILES ${CMAKE_CURRENT_BINARY_DIR}/libclc.pc DESTINATION "${CMAKE_INSTALL_DATADIR}/pkgconfig" )
-install( DIRECTORY generic/include/clc DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}" )
+install( FILES ${CMAKE_CURRENT_BINARY_DIR}/libclc.pc DESTINATION ${CMAKE_INSTALL_DATADIR}/pkgconfig )
+install( DIRECTORY generic/include/clc DESTINATION ${CMAKE_INSTALL_INCLUDEDIR} )
 
 if( ENABLE_RUNTIME_SUBNORMAL )
 	add_library( subnormal_use_default STATIC
@@ -192,7 +192,7 @@ if( ENABLE_RUNTIME_SUBNORMAL )
 	add_library( subnormal_disable STATIC
 		generic/lib/subnormal_disable.ll )
 	install( TARGETS subnormal_use_default subnormal_disable ARCHIVE
-		DESTINATION "${CMAKE_INSTALL_DATADIR}/clc" )
+		DESTINATION ${CMAKE_INSTALL_DATADIR}/clc )
 endif()
 
 find_package( Python3 REQUIRED COMPONENTS Interpreter )
@@ -343,7 +343,7 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )
 			add_custom_target( "prepare-${spv_suffix}" ALL
 			                   DEPENDS "${spv_suffix}" )
 			install( FILES ${CMAKE_CURRENT_BINARY_DIR}/${spv_suffix}
-				 DESTINATION "${CMAKE_INSTALL_DATADIR}/clc" )
+				 DESTINATION ${CMAKE_INSTALL_DATADIR}/clc )
 		else()
 
 			# Add prepare target
@@ -366,7 +366,7 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )
 					PROPERTIES ENVIRONMENT "LLVM_CONFIG=${LLVM_CONFIG}" )
 			endif()
 
-			install( FILES ${CMAKE_CURRENT_BINARY_DIR}/${obj_suffix} DESTINATION "${CMAKE_INSTALL_DATADIR}/clc" )
+			install( FILES ${CMAKE_CURRENT_BINARY_DIR}/${obj_suffix} DESTINATION ${CMAKE_INSTALL_DATADIR}/clc )
 			foreach( a ${${d}_aliases} )
 				set( alias_suffix "${a}-${t}.bc" )
 				add_custom_target( ${alias_suffix} ALL
@@ -374,7 +374,7 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )
 						   create_symlink ${obj_suffix}
 						   ${alias_suffix}
 				                   DEPENDS "prepare-${obj_suffix}" )
-				install( FILES ${CMAKE_CURRENT_BINARY_DIR}/${alias_suffix} DESTINATION "${CMAKE_INSTALL_DATADIR}/clc" )
+				install( FILES ${CMAKE_CURRENT_BINARY_DIR}/${alias_suffix} DESTINATION ${CMAKE_INSTALL_DATADIR}/clc )
 			endforeach( a )
 		endif()
 	endforeach( d )
diff --git a/lldb/cmake/modules/FindLibEdit.cmake b/lldb/cmake/modules/FindLibEdit.cmake
index 8b00d34de001..b4f0cb329811 100644
--- a/lldb/cmake/modules/FindLibEdit.cmake
+++ b/lldb/cmake/modules/FindLibEdit.cmake
@@ -25,14 +25,14 @@ else()
             HINTS
               ${PC_LIBEDIT_INCLUDEDIR}
               ${PC_LIBEDIT_INCLUDE_DIRS}
-              "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
+              ${CMAKE_INSTALL_FULL_INCLUDEDIR})
   find_library(LibEdit_LIBRARIES
                NAMES
                  edit libedit
                HINTS
                  ${PC_LIBEDIT_LIBDIR}
                  ${PC_LIBEDIT_LIBRARY_DIRS}
-                 "${CMAKE_INSTALL_FULL_LIBDIR}")
+                 ${CMAKE_INSTALL_FULL_LIBDIR})
 
   if(LibEdit_INCLUDE_DIRS AND EXISTS "${LibEdit_INCLUDE_DIRS}/histedit.h")
     file(STRINGS "${LibEdit_INCLUDE_DIRS}/histedit.h"
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index f2753402f4b1..d12befc1a538 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -281,12 +281,9 @@ if (CMAKE_BUILD_TYPE AND
   message(FATAL_ERROR "Invalid value for CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
 endif()
 
-include(GNUInstallDirs)
-
 set(LLVM_LIBDIR_SUFFIX "" CACHE STRING "Define suffix of library directory name (32/64)" )
 
-set(LLVM_TOOLS_INSTALL_DIR "${CMAKE_INSTALL_BINDIR}" CACHE STRING
-    "Path for binary subdirectory (defaults to '${CMAKE_INSTALL_BINDIR}')")
+set(LLVM_TOOLS_INSTALL_DIR "bin" CACHE STRING "Path for binary subdirectory (defaults to 'bin')")
 mark_as_advanced(LLVM_TOOLS_INSTALL_DIR)
 
 set(LLVM_UTILS_INSTALL_DIR "${LLVM_TOOLS_INSTALL_DIR}" CACHE STRING
@@ -608,9 +605,9 @@ option (LLVM_ENABLE_SPHINX "Use Sphinx to generate llvm documentation." OFF)
 option (LLVM_ENABLE_OCAMLDOC "Build OCaml bindings documentation." ON)
 option (LLVM_ENABLE_BINDINGS "Build bindings." ON)
 
-set(LLVM_INSTALL_DOXYGEN_HTML_DIR "${CMAKE_INSTALL_DOCDIR}/llvm/doxygen-html"
+set(LLVM_INSTALL_DOXYGEN_HTML_DIR "share/doc/llvm/doxygen-html"
     CACHE STRING "Doxygen-generated HTML documentation install directory")
-set(LLVM_INSTALL_OCAMLDOC_HTML_DIR "${CMAKE_INSTALL_DOCDIR}/llvm/ocaml-html"
+set(LLVM_INSTALL_OCAMLDOC_HTML_DIR "share/doc/llvm/ocaml-html"
     CACHE STRING "OCamldoc-generated HTML documentation install directory")
 
 option (LLVM_BUILD_EXTERNAL_COMPILER_RT
@@ -1122,7 +1119,7 @@ endif()
 
 if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
   install(DIRECTORY include/llvm include/llvm-c
-    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+    DESTINATION include
     COMPONENT llvm-headers
     FILES_MATCHING
     PATTERN "*.def"
@@ -1133,7 +1130,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
     )
 
   install(DIRECTORY ${LLVM_INCLUDE_DIR}/llvm ${LLVM_INCLUDE_DIR}/llvm-c
-    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+    DESTINATION include
     COMPONENT llvm-headers
     FILES_MATCHING
     PATTERN "*.def"
@@ -1147,13 +1144,13 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
 
   if (LLVM_INSTALL_MODULEMAPS)
     install(DIRECTORY include/llvm include/llvm-c
-            DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+            DESTINATION include
             COMPONENT llvm-headers
             FILES_MATCHING
             PATTERN "module.modulemap"
             )
     install(FILES include/llvm/module.install.modulemap
-            DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/llvm"
+            DESTINATION include/llvm
             COMPONENT llvm-headers
             RENAME "module.extern.modulemap"
             )
diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index 99b9d34df8a5..1d97626d69cc 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -845,7 +845,7 @@ macro(add_llvm_library name)
               ${export_to_llvmexports}
               LIBRARY DESTINATION lib${LLVM_LIBDIR_SUFFIX} COMPONENT ${name}
               ARCHIVE DESTINATION lib${LLVM_LIBDIR_SUFFIX} COMPONENT ${name}
-              RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT ${name})
+              RUNTIME DESTINATION bin COMPONENT ${name})
 
       if (NOT LLVM_ENABLE_IDE)
         add_llvm_install_targets(install-${name}
@@ -1278,7 +1278,7 @@ macro(add_llvm_example name)
   endif()
   add_llvm_executable(${name} ${ARGN})
   if( LLVM_BUILD_EXAMPLES )
-    install(TARGETS ${name} RUNTIME DESTINATION "${CMAKE_INSTALL_DOCDIR}/examples")
+    install(TARGETS ${name} RUNTIME DESTINATION examples)
   endif()
   set_target_properties(${name} PROPERTIES FOLDER "Examples")
 endmacro(add_llvm_example name)
diff --git a/llvm/cmake/modules/AddSphinxTarget.cmake b/llvm/cmake/modules/AddSphinxTarget.cmake
index 256c9336e1f9..e80c3b5c1cac 100644
--- a/llvm/cmake/modules/AddSphinxTarget.cmake
+++ b/llvm/cmake/modules/AddSphinxTarget.cmake
@@ -74,7 +74,7 @@ function (add_sphinx_target builder project)
     if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
       if (builder STREQUAL man)
         if (CMAKE_INSTALL_MANDIR)
-          set(INSTALL_MANDIR "${CMAKE_INSTALL_MANDIR}")
+          set(INSTALL_MANDIR ${CMAKE_INSTALL_MANDIR}/)
         else()
           set(INSTALL_MANDIR share/man/)
         endif()
@@ -90,7 +90,7 @@ function (add_sphinx_target builder project)
         endif()
       elseif (builder STREQUAL html)
         string(TOUPPER "${project}" project_upper)
-        set(${project_upper}_INSTALL_SPHINX_HTML_DIR "${CMAKE_INSTALL_DOCDIR}/llvm/html"
+        set(${project_upper}_INSTALL_SPHINX_HTML_DIR "share/doc/${project}/html"
             CACHE STRING "HTML documentation install directory for ${project}")
 
         # '/.' indicates: copy the contents of the directory directly into
diff --git a/llvm/cmake/modules/CMakeLists.txt b/llvm/cmake/modules/CMakeLists.txt
index b2bb370124f2..51b6a4fdc284 100644
--- a/llvm/cmake/modules/CMakeLists.txt
+++ b/llvm/cmake/modules/CMakeLists.txt
@@ -1,7 +1,6 @@
 include(LLVMDistributionSupport)
 
-set(LLVM_INSTALL_PACKAGE_DIR lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm CACHE STRING
-  "Path for CMake subdirectory (defaults to 'lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm')")
+set(LLVM_INSTALL_PACKAGE_DIR lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm)
 set(llvm_cmake_builddir "${LLVM_BINARY_DIR}/${LLVM_INSTALL_PACKAGE_DIR}")
 
 # First for users who use an installed LLVM, create the LLVMExports.cmake file.
@@ -110,13 +109,13 @@ foreach(p ${_count})
   set(LLVM_CONFIG_CODE "${LLVM_CONFIG_CODE}
 get_filename_component(LLVM_INSTALL_PREFIX \"\${LLVM_INSTALL_PREFIX}\" PATH)")
 endforeach(p)
-set(LLVM_CONFIG_INCLUDE_DIRS "\${LLVM_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
+set(LLVM_CONFIG_INCLUDE_DIRS "\${LLVM_INSTALL_PREFIX}/include")
 set(LLVM_CONFIG_INCLUDE_DIR "${LLVM_CONFIG_INCLUDE_DIRS}")
 set(LLVM_CONFIG_MAIN_INCLUDE_DIR "${LLVM_CONFIG_INCLUDE_DIRS}")
 set(LLVM_CONFIG_LIBRARY_DIRS "\${LLVM_INSTALL_PREFIX}/lib\${LLVM_LIBDIR_SUFFIX}")
 set(LLVM_CONFIG_CMAKE_DIR "\${LLVM_INSTALL_PREFIX}/${LLVM_INSTALL_PACKAGE_DIR}")
 set(LLVM_CONFIG_BINARY_DIR "\${LLVM_INSTALL_PREFIX}")
-set(LLVM_CONFIG_TOOLS_BINARY_DIR "\${LLVM_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
+set(LLVM_CONFIG_TOOLS_BINARY_DIR "\${LLVM_INSTALL_PREFIX}/bin")
 
 # Generate a default location for lit
 if (LLVM_INSTALL_UTILS AND LLVM_BUILD_UTILS)
diff --git a/llvm/cmake/modules/LLVMInstallSymlink.cmake b/llvm/cmake/modules/LLVMInstallSymlink.cmake
index 545883dd7dfb..3e6a2c9a2648 100644
--- a/llvm/cmake/modules/LLVMInstallSymlink.cmake
+++ b/llvm/cmake/modules/LLVMInstallSymlink.cmake
@@ -4,7 +4,7 @@
 
 function(install_symlink name target outdir)
   set(DESTDIR $ENV{DESTDIR})
-  set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/${outdir}")
+  set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/${outdir}/")
 
   message(STATUS "Creating ${name}")
 
diff --git a/llvm/docs/CMake.rst b/llvm/docs/CMake.rst
index 8d8223e509bb..3c7cbc85ed2e 100644
--- a/llvm/docs/CMake.rst
+++ b/llvm/docs/CMake.rst
@@ -252,22 +252,6 @@ manual, or execute ``cmake --help-variable VARIABLE_NAME``.
   Sets the C++ standard to conform to when building LLVM.  Possible values are
   14, 17, 20.  LLVM Requires C++ 14 or higher.  This defaults to 14.
 
-**CMAKE_INSTALL_BINDIR**:STRING
-  The path to install binary tools, relative to the ``CMAKE_INSTALL_PREFIX``.
-  Defaults to ``bin``.
-
-**CMAKE_INSTALL_INCLUDEDIR**:STRING
-  The path to install header files, relative to the ``CMAKE_INSTALL_PREFIX``.
-  Defaults to ``include``.
-
-**CMAKE_INSTALL_DOCDIR**:STRING
-  The path to install documentation, relative to the ``CMAKE_INSTALL_PREFIX``.
-  Defaults to ``share/doc``.
-
-**CMAKE_INSTALL_MANDIR**:STRING
-  The path to install manpage files, relative to the ``CMAKE_INSTALL_PREFIX``.
-  Defaults to ``share/man``.
-
 .. _LLVM-related variables:
 
 LLVM-related variables
@@ -614,12 +598,12 @@ enabled sub-projects. Nearly all of these variable names begin with
 **LLVM_INSTALL_OCAMLDOC_HTML_DIR**:STRING
   The path to install OCamldoc-generated HTML documentation to. This path can
   either be absolute or relative to the CMAKE_INSTALL_PREFIX. Defaults to
-  ``${CMAKE_INSTALL_DOCDIR}/llvm/ocaml-html``.
+  `share/doc/llvm/ocaml-html`.
 
 **LLVM_INSTALL_SPHINX_HTML_DIR**:STRING
   The path to install Sphinx-generated HTML documentation to. This path can
   either be absolute or relative to the CMAKE_INSTALL_PREFIX. Defaults to
-  ``${CMAKE_INSTALL_DOCDIR}/llvm/html``.
+  `share/doc/llvm/html`.
 
 **LLVM_INSTALL_UTILS**:BOOL
   If enabled, utility binaries like ``FileCheck`` and ``not`` will be installed
@@ -643,8 +627,8 @@ enabled sub-projects. Nearly all of these variable names begin with
 
 **LLVM_INSTALL_DOXYGEN_HTML_DIR**:STRING
   The path to install Doxygen-generated HTML documentation to. This path can
-  either be absolute or relative to the ``CMAKE_INSTALL_PREFIX``. Defaults to
-  ``${CMAKE_INSTALL_DOCDIR}/llvm/doxygen-html``.
+  either be absolute or relative to the CMAKE_INSTALL_PREFIX. Defaults to
+  `share/doc/llvm/doxygen-html`.
 
 **LLVM_LINK_LLVM_DYLIB**:BOOL
   If enabled, tools will be linked with the libLLVM shared library. Defaults
diff --git a/llvm/examples/Bye/CMakeLists.txt b/llvm/examples/Bye/CMakeLists.txt
index 943c86143722..bb96edb4b4bf 100644
--- a/llvm/examples/Bye/CMakeLists.txt
+++ b/llvm/examples/Bye/CMakeLists.txt
@@ -14,6 +14,6 @@ if (NOT WIN32)
     BUILDTREE_ONLY
    )
 
-  install(TARGETS ${name} RUNTIME DESTINATION "${CMAKE_INSTALL_DOCDIR}/examples")
+  install(TARGETS ${name} RUNTIME DESTINATION examples)
   set_target_properties(${name} PROPERTIES FOLDER "Examples")
 endif()
diff --git a/llvm/include/llvm/CMakeLists.txt b/llvm/include/llvm/CMakeLists.txt
index 2feabd1954e4..b46319f24fc8 100644
--- a/llvm/include/llvm/CMakeLists.txt
+++ b/llvm/include/llvm/CMakeLists.txt
@@ -5,5 +5,5 @@ add_subdirectory(Frontend)
 # If we're doing an out-of-tree build, copy a module map for generated
 # header files into the build area.
 if (NOT "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
-  configure_file(module.modulemap.build ${LLVM_INCLUDE_DIR}/module.modulemap COPYONLY)
+  configure_file(module.modulemap.build module.modulemap COPYONLY)
 endif (NOT "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
diff --git a/llvm/tools/llvm-config/BuildVariables.inc.in b/llvm/tools/llvm-config/BuildVariables.inc.in
index e2c0fca6db9a..ebe5b73a5c65 100644
--- a/llvm/tools/llvm-config/BuildVariables.inc.in
+++ b/llvm/tools/llvm-config/BuildVariables.inc.in
@@ -23,8 +23,6 @@
 #define LLVM_CXXFLAGS "@LLVM_CXXFLAGS@"
 #define LLVM_BUILDMODE "@LLVM_BUILDMODE@"
 #define LLVM_LIBDIR_SUFFIX "@LLVM_LIBDIR_SUFFIX@"
-#define LLVM_INSTALL_BINDIR "@CMAKE_INSTALL_BINDIR@"
-#define LLVM_INSTALL_INCLUDEDIR "@CMAKE_INSTALL_INCLUDEDIR@"
 #define LLVM_TARGETS_BUILT "@LLVM_TARGETS_BUILT@"
 #define LLVM_SYSTEM_LIBS "@LLVM_SYSTEM_LIBS@"
 #define LLVM_BUILD_SYSTEM "@LLVM_BUILD_SYSTEM@"
diff --git a/llvm/tools/llvm-config/llvm-config.cpp b/llvm/tools/llvm-config/llvm-config.cpp
index bce73aeabd81..8afd3593272f 100644
--- a/llvm/tools/llvm-config/llvm-config.cpp
+++ b/llvm/tools/llvm-config/llvm-config.cpp
@@ -357,16 +357,10 @@ int main(int argc, char **argv) {
         ("-I" + ActiveIncludeDir + " " + "-I" + ActiveObjRoot + "/include");
   } else {
     ActivePrefix = CurrentExecPrefix;
-    {
-      SmallString<256> Path(LLVM_INSTALL_INCLUDEDIR);
-      sys::fs::make_absolute(ActivePrefix, Path);
-      ActiveIncludeDir = std::string(Path.str());
-    }
-    {
-      SmallString<256> Path(LLVM_INSTALL_BINDIR);
-      sys::fs::make_absolute(ActivePrefix, Path);
-      ActiveBinDir = std::string(Path.str());
-    }
+    ActiveIncludeDir = ActivePrefix + "/include";
+    SmallString<256> path(LLVM_TOOLS_INSTALL_DIR);
+    sys::fs::make_absolute(ActivePrefix, path);
+    ActiveBinDir = std::string(path.str());
     ActiveLibDir = ActivePrefix + "/lib" + LLVM_LIBDIR_SUFFIX;
     ActiveCMakeDir = ActiveLibDir + "/cmake/llvm";
     ActiveIncludeOption = "-I" + ActiveIncludeDir;
diff --git a/llvm/tools/lto/CMakeLists.txt b/llvm/tools/lto/CMakeLists.txt
index 67f6d3af40e0..0af29ad762c5 100644
--- a/llvm/tools/lto/CMakeLists.txt
+++ b/llvm/tools/lto/CMakeLists.txt
@@ -33,7 +33,7 @@ add_llvm_library(${LTO_LIBRARY_NAME} ${LTO_LIBRARY_TYPE} INSTALL_WITH_TOOLCHAIN
     ${SOURCES} DEPENDS intrinsics_gen)
 
 install(FILES ${LLVM_MAIN_INCLUDE_DIR}/llvm-c/lto.h
-  DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/llvm-c"
+  DESTINATION include/llvm-c
   COMPONENT LTO)
 
 if (APPLE)
diff --git a/llvm/tools/opt-viewer/CMakeLists.txt b/llvm/tools/opt-viewer/CMakeLists.txt
index c0070f8cbfac..ead73ec13a8f 100644
--- a/llvm/tools/opt-viewer/CMakeLists.txt
+++ b/llvm/tools/opt-viewer/CMakeLists.txt
@@ -8,7 +8,7 @@ set (files
 
 foreach (file ${files})
   install(PROGRAMS ${file}
-    DESTINATION "${CMAKE_INSTALL_DATADIR}/opt-viewer"
+    DESTINATION share/opt-viewer
     COMPONENT opt-viewer)
 endforeach (file)
 
diff --git a/llvm/tools/remarks-shlib/CMakeLists.txt b/llvm/tools/remarks-shlib/CMakeLists.txt
index f22cedd9ead7..865436247270 100644
--- a/llvm/tools/remarks-shlib/CMakeLists.txt
+++ b/llvm/tools/remarks-shlib/CMakeLists.txt
@@ -19,7 +19,7 @@ if(LLVM_ENABLE_PIC)
   endif()
   
   install(FILES ${LLVM_MAIN_INCLUDE_DIR}/llvm-c/Remarks.h
-    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/llvm-c"
+    DESTINATION include/llvm-c
     COMPONENT Remarks)
 
   if (APPLE)
diff --git a/openmp/runtime/src/CMakeLists.txt b/openmp/runtime/src/CMakeLists.txt
index d13f77d33bc3..60f97bd3d2ae 100644
--- a/openmp/runtime/src/CMakeLists.txt
+++ b/openmp/runtime/src/CMakeLists.txt
@@ -360,7 +360,7 @@ if(WIN32)
     install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy \"${LIBOMP_LIB_FILE}\"
       \"${alias}${LIBOMP_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \${CMAKE_INSTALL_PREFIX}/bin)")
     install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy \"${LIBOMP_IMP_LIB_FILE}\"
-      \"${alias}${CMAKE_STATIC_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"\${CMAKE_INSTALL_PREFIX}/${OPENMP_INSTALL_LIBDIR}\")")
+      \"${alias}${CMAKE_STATIC_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \${CMAKE_INSTALL_PREFIX}/${OPENMP_INSTALL_LIBDIR})")
   endforeach()
 else()
 
@@ -372,7 +372,7 @@ else()
     foreach(alias IN LISTS LIBOMP_ALIASES)
       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}\${CMAKE_INSTALL_PREFIX}/${OPENMP_INSTALL_LIBDIR})")
     endforeach()
   endif()
 endif()