[libc++] Remove redundant if(LIBCXX_INSTALL_LIBRARY)

The individual LIBCXX_INSTALL_(SHARED|STATIC)_LIBRARY are already
dependent on whether LIBCXX_INSTALL_LIBRARY is ON or OFF.

Author: ldionne

libcxx/src/CMakeLists.txt

@@ -340,41 +340,38 @@ if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
   target_link_libraries(cxx_external_threads PRIVATE cxx-headers)
 endif()
 
-if (LIBCXX_INSTALL_LIBRARY)
-  if (LIBCXX_INSTALL_SHARED_LIBRARY)
-    install(TARGETS cxx_shared
-      ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
-      LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
-      RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
-  endif()
+if (LIBCXX_INSTALL_SHARED_LIBRARY)
+  install(TARGETS cxx_shared
+    ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+    LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
+endif()
 
-  if (LIBCXX_INSTALL_STATIC_LIBRARY)
-    install(TARGETS cxx_static
-      ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
-      LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
-      RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
-  endif()
+if (LIBCXX_INSTALL_STATIC_LIBRARY)
+  install(TARGETS cxx_static
+    ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+    LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
+endif()
 
-  if(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY)
-    install(TARGETS cxx_experimental
-      LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
-      ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
-      RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
-  endif()
+if(LIBCXX_INSTALL_EXPERIMENTAL_LIBRARY)
+  install(TARGETS cxx_experimental
+    LIBRARY DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+    ARCHIVE DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR} COMPONENT cxx
+    RUNTIME DESTINATION ${LIBCXX_INSTALL_PREFIX}bin COMPONENT cxx)
+endif()
 
-  # NOTE: This install command must go after the cxx install command otherwise
-  # it will not be executed after the library symlinks are installed.
-  if (LIBCXX_ENABLE_SHARED AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
-    # Replace the libc++ filename with $<TARGET_LINKER_FILE:cxx>
-    # after we required CMake 3.0.
-    install(FILES "${LIBCXX_LIBRARY_DIR}/libc++${CMAKE_SHARED_LIBRARY_SUFFIX}"
-      DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR}
-      COMPONENT libcxx)
-  endif()
+# NOTE: This install command must go after the cxx install command otherwise
+# it will not be executed after the library symlinks are installed.
+if (LIBCXX_ENABLE_SHARED AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
+  # Replace the libc++ filename with $<TARGET_LINKER_FILE:cxx>
+  # after we required CMake 3.0.
+  install(FILES "${LIBCXX_LIBRARY_DIR}/libc++${CMAKE_SHARED_LIBRARY_SUFFIX}"
+    DESTINATION ${LIBCXX_INSTALL_PREFIX}${LIBCXX_INSTALL_LIBRARY_DIR}
+    COMPONENT libcxx)
 endif()
 
-if (NOT CMAKE_CONFIGURATION_TYPES AND (LIBCXX_INSTALL_LIBRARY OR
-                                       LIBCXX_INSTALL_HEADERS))
+if (NOT CMAKE_CONFIGURATION_TYPES)
     if(LIBCXX_INSTALL_LIBRARY)
       set(lib_install_target cxx)
     endif()