[libc++] Create install-stripped targets

LLVM is gaining install-*-stripped targets to perform stripped installs,
and in order for this to be useful for install-distribution, all
potential distribution components should have stripped installation
targets. LLVM has a function to create these install targets, but since
we can't use LLVM CMake functions in libc++, let's do it manually.

Differential Revision: https://reviews.llvm.org/D40680

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@319959 91177308-0d34-0410-b5e6-96231b3b80d8

include/CMakeLists.txt

@@ -58,6 +58,8 @@ if (LIBCXX_INSTALL_HEADERS)
                       COMMAND "${CMAKE_COMMAND}"
                               -DCMAKE_INSTALL_COMPONENT=cxx-headers
                               -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
+    # Stripping is a no-op for headers
+    add_custom_target(install-cxx-headers-stripped DEPENDS install-cxx-headers)
 
     add_custom_target(libcxx-headers)
     add_custom_target(install-libcxx-headers DEPENDS install-cxx-headers)

lib/CMakeLists.txt

@@ -389,5 +389,13 @@ if (NOT CMAKE_CONFIGURATION_TYPES AND (LIBCXX_INSTALL_LIBRARY OR
                       COMMAND "${CMAKE_COMMAND}"
                       -DCMAKE_INSTALL_COMPONENT=cxx
                       -P "${LIBCXX_BINARY_DIR}/cmake_install.cmake")
+    add_custom_target(install-cxx-stripped
+                      DEPENDS ${lib_install_target}
+                              ${experimental_lib_install_target}
+                              ${header_install_target}
+                      COMMAND "${CMAKE_COMMAND}"
+                      -DCMAKE_INSTALL_COMPONENT=cxx
+                      -DCMAKE_INSTALL_DO_STRIP=1
+                      -P "${LIBCXX_BINARY_DIR}/cmake_install.cmake")
     add_custom_target(install-libcxx DEPENDS install-cxx)
 endif()