Index: llvm/trunk/CMakeLists.txt
===================================================================
--- llvm/trunk/CMakeLists.txt
+++ llvm/trunk/CMakeLists.txt
@@ -456,6 +456,11 @@
 option (LLVM_ENABLE_SPHINX "Use Sphinx to generate llvm documentation." OFF)
 option (LLVM_ENABLE_OCAMLDOC "Build OCaml bindings documentation." ON)
 
+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 "share/doc/llvm/ocaml-html"
+    CACHE STRING "OCamldoc-generated HTML documentation install directory")
+
 option (LLVM_BUILD_EXTERNAL_COMPILER_RT
   "Build compiler-rt as an external project." OFF)
 
Index: llvm/trunk/docs/CMake.rst
===================================================================
--- llvm/trunk/docs/CMake.rst
+++ llvm/trunk/docs/CMake.rst
@@ -431,6 +431,11 @@
   Uses .svg files instead of .png files for graphs in the Doxygen output.
   Defaults to OFF.
 
+**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
+  `share/doc/llvm/doxygen-html`.
+
 **LLVM_ENABLE_SPHINX**:BOOL
   If specified, CMake will search for the ``sphinx-build`` executable and will make
   the ``SPHINX_OUTPUT_HTML`` and ``SPHINX_OUTPUT_MAN`` CMake options available.
@@ -461,6 +466,11 @@
   either be absolute or relative to the CMAKE_INSTALL_PREFIX. Defaults to
   `share/doc/llvm/html`.
 
+**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
+  `share/doc/llvm/ocaml-html`.
+
 **LLVM_CREATE_XCODE_TOOLCHAIN**:BOOL
   OS X Only: If enabled CMake will generate a target named
   'install-xcode-toolchain'. This target will create a directory at
Index: llvm/trunk/docs/CMakeLists.txt
===================================================================
--- llvm/trunk/docs/CMakeLists.txt
+++ llvm/trunk/docs/CMakeLists.txt
@@ -93,8 +93,11 @@
   endif()
 
   if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-    install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/doxygen/html
-      DESTINATION docs/html)
+    # ./ suffix is needed to copy the contents of html directory without
+    # appending html/ into LLVM_INSTALL_DOXYGEN_HTML_DIR.
+    install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/doxygen/html/.
+      COMPONENT doxygen-html
+      DESTINATION "${LLVM_INSTALL_DOXYGEN_HTML_DIR}")
   endif()
 endif()
 endif()
@@ -154,7 +157,10 @@
   add_dependencies(ocaml_doc ${doc_targets})
 
   if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
-    install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/ocamldoc/html
-      DESTINATION docs/ocaml/html)
+    # ./ suffix is needed to copy the contents of html directory without
+    # appending html/ into LLVM_INSTALL_OCAMLDOC_HTML_DIR.
+    install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/ocamldoc/html/.
+      COMPONENT ocamldoc-html
+      DESTINATION "${LLVM_INSTALL_OCAMLDOC_HTML_DIR}")
   endif()
 endif()