diff --git a/clang/tools/scan-build/CMakeLists.txt b/clang/tools/scan-build/CMakeLists.txt
--- a/clang/tools/scan-build/CMakeLists.txt
+++ b/clang/tools/scan-build/CMakeLists.txt
@@ -66,16 +66,16 @@
   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
--- a/libclc/CMakeLists.txt
+++ b/libclc/CMakeLists.txt
@@ -183,8 +183,8 @@
 
 # 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 @@
 	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 @@
 			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 @@
 					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 @@
 						   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/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt
--- a/libcxx/include/CMakeLists.txt
+++ b/libcxx/include/CMakeLists.txt
@@ -531,7 +531,7 @@
   foreach(file ${files})
     get_filename_component(dir ${file} DIRECTORY)
     install(FILES ${file}
-      DESTINATION ${LIBCXX_INSTALL_INCLUDE_DIR}/${dir}
+      DESTINATION "${LIBCXX_INSTALL_INCLUDE_DIR}/${dir}"
       COMPONENT cxx-headers
       PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
     )
@@ -539,7 +539,7 @@
 
   # Install the generated __config_site.
   install(FILES ${LIBCXX_GENERATED_INCLUDE_TARGET_DIR}/__config_site
-    DESTINATION ${LIBCXX_INSTALL_INCLUDE_TARGET_DIR}
+    DESTINATION "${LIBCXX_INSTALL_INCLUDE_TARGET_DIR}"
     PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
     COMPONENT cxx-headers)
 
diff --git a/lldb/cmake/modules/FindLibEdit.cmake b/lldb/cmake/modules/FindLibEdit.cmake
--- a/lldb/cmake/modules/FindLibEdit.cmake
+++ b/lldb/cmake/modules/FindLibEdit.cmake
@@ -25,14 +25,14 @@
             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/cmake/modules/AddSphinxTarget.cmake b/llvm/cmake/modules/AddSphinxTarget.cmake
--- a/llvm/cmake/modules/AddSphinxTarget.cmake
+++ b/llvm/cmake/modules/AddSphinxTarget.cmake
@@ -74,7 +74,7 @@
     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()
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
@@ -358,9 +358,9 @@
   set(LIBOMP_ALIASES "libiomp5md")
   foreach(alias IN LISTS LIBOMP_ALIASES)
     install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy \"${LIBOMP_LIB_FILE}\"
-      \"${alias}${LIBOMP_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \${CMAKE_INSTALL_PREFIX}/bin)")
+      \"${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 @@
     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()