[libc++abi] Stop copying headers to the build directory

compiler-rt/cmake/Modules/AddCompilerRT.cmake

@@ -680,15 +680,17 @@ macro(add_custom_libcxx name prefix)
 
   ExternalProject_Add(${name}
     DEPENDS ${name}-clobber ${LIBCXX_DEPS}
-    PREFIX ${CMAKE_CURRENT_BINARY_DIR}/${name}
+    PREFIX ${prefix}
     SOURCE_DIR ${LLVM_MAIN_SRC_DIR}/../runtimes
-    BINARY_DIR ${prefix}
+    BINARY_DIR ${prefix}/build
     CMAKE_ARGS ${CMAKE_PASSTHROUGH_VARIABLES}
                ${compiler_args}
                ${verbose}
                -DCMAKE_C_FLAGS=${LIBCXX_C_FLAGS}
                -DCMAKE_CXX_FLAGS=${LIBCXX_CXX_FLAGS}
                -DCMAKE_BUILD_TYPE=Release
+               -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+               -DCMAKE_INSTALL_MESSAGE=LAZY
                -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY
                -DLLVM_ENABLE_RUNTIMES=libcxx|libcxxabi
                -DLIBCXXABI_USE_LLVM_UNWINDER=OFF
@@ -701,16 +703,17 @@ macro(add_custom_libcxx name prefix)
                -DLIBCXX_INCLUDE_BENCHMARKS=OFF
                -DLIBCXX_INCLUDE_TESTS=OFF
                -DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=ON
+               -DLLVM_INCLUDE_TESTS=OFF
+               -DLLVM_INCLUDE_DOCS=OFF
                ${LIBCXX_CMAKE_ARGS}
-    INSTALL_COMMAND ""
-    STEP_TARGETS configure build
+    STEP_TARGETS configure build install
     BUILD_ALWAYS 1
     USES_TERMINAL_CONFIGURE 1
     USES_TERMINAL_BUILD 1
     USES_TERMINAL_INSTALL 1
     LIST_SEPARATOR |
     EXCLUDE_FROM_ALL TRUE
-    BUILD_BYPRODUCTS "${prefix}/lib/libc++.a" "${prefix}/lib/libc++abi.a"
+    INSTALL_BYPRODUCTS "${prefix}/lib/libc++.a" "${prefix}/lib/libc++abi.a"
     )
 
   if (CMAKE_GENERATOR MATCHES "Make")

compiler-rt/lib/fuzzer/CMakeLists.txt

@@ -166,11 +166,11 @@ if(OS_NAME MATCHES "Android|Linux|Fuchsia" AND
                  -DLIBCXX_ABI_NAMESPACE=__Fuzzer
                  -DLIBCXX_ENABLE_EXCEPTIONS=OFF)
     target_compile_options(RTfuzzer.${arch} PRIVATE -isystem ${LIBCXX_${arch}_PREFIX}/include/c++/v1)
-    add_dependencies(RTfuzzer.${arch} libcxx_fuzzer_${arch}-build)
+    add_dependencies(RTfuzzer.${arch} libcxx_fuzzer_${arch}-install)
     target_compile_options(RTfuzzer_main.${arch} PRIVATE -isystem ${LIBCXX_${arch}_PREFIX}/include/c++/v1)
-    add_dependencies(RTfuzzer_main.${arch} libcxx_fuzzer_${arch}-build)
+    add_dependencies(RTfuzzer_main.${arch} libcxx_fuzzer_${arch}-install)
     target_compile_options(RTfuzzer_interceptors.${arch} PRIVATE -isystem ${LIBCXX_${arch}_PREFIX}/include/c++/v1)
-    add_dependencies(RTfuzzer_interceptors.${arch} libcxx_fuzzer_${arch}-build)
+    add_dependencies(RTfuzzer_interceptors.${arch} libcxx_fuzzer_${arch}-install)
     partially_link_libcxx(fuzzer_no_main ${LIBCXX_${arch}_PREFIX} ${arch})
     partially_link_libcxx(fuzzer_interceptors ${LIBCXX_${arch}_PREFIX} ${arch})
     partially_link_libcxx(fuzzer ${LIBCXX_${arch}_PREFIX} ${arch})

compiler-rt/lib/fuzzer/tests/CMakeLists.txt

@@ -64,7 +64,7 @@ if(COMPILER_RT_DEFAULT_TARGET_ARCH IN_LIST FUZZER_SUPPORTED_ARCH)
      COMPILER_RT_LIBCXX_PATH AND
      COMPILER_RT_LIBCXXABI_PATH)
     file(GLOB libfuzzer_headers ../*.h)
-    set(LIBFUZZER_TEST_RUNTIME_DEPS libcxx_fuzzer_${arch}-build ${libfuzzer_headers})
+    set(LIBFUZZER_TEST_RUNTIME_DEPS libcxx_fuzzer_${arch}-install ${libfuzzer_headers})
     set(LIBFUZZER_TEST_RUNTIME_CFLAGS -isystem ${LIBCXX_${arch}_PREFIX}/include/c++/v1)
     set(LIBFUZZER_TEST_RUNTIME_LINK_FLAGS ${LIBCXX_${arch}_PREFIX}/lib/libc++.a)
   endif()

compiler-rt/lib/msan/tests/CMakeLists.txt

@@ -69,7 +69,7 @@ macro(msan_compile obj_list source arch kind cflags)
   sanitizer_test_compile(
     ${obj_list} ${source} ${arch}
     KIND ${kind}
-    COMPILE_DEPS ${MSAN_UNITTEST_HEADERS} libcxx_msan_${arch}-build
+    COMPILE_DEPS ${MSAN_UNITTEST_HEADERS} libcxx_msan_${arch}-install
     DEPS msan
     CFLAGS -isystem ${MSAN_LIBCXX_DIR}/../include/c++/v1
            ${MSAN_UNITTEST_INSTRUMENTED_CFLAGS} ${cflags}
@@ -117,10 +117,10 @@ macro(add_msan_tests_for_arch arch kind cflags)
                    DEPS ${MSAN_INST_LOADABLE_OBJECTS})
 
   set(MSAN_TEST_OBJECTS ${MSAN_INST_TEST_OBJECTS} ${MSAN_INST_GTEST})
-  set(MSAN_TEST_DEPS ${MSAN_TEST_OBJECTS} libcxx_msan_${arch}-build
+  set(MSAN_TEST_DEPS ${MSAN_TEST_OBJECTS} libcxx_msan_${arch}-install
                      ${MSAN_LOADABLE_SO}
-		     "${MSAN_LIBCXX_DIR}/libc++.a" "${MSAN_LIBCXX_DIR}/libc++abi.a")
-  list(APPEND MSAN_TEST_DEPS msan libcxx_msan_${arch}-build)
+                     "${MSAN_LIBCXX_DIR}/libc++.a" "${MSAN_LIBCXX_DIR}/libc++abi.a")
+  list(APPEND MSAN_TEST_DEPS msan libcxx_msan_${arch}-install)
   get_target_flags_for_arch(${arch} TARGET_LINK_FLAGS)
   add_compiler_rt_test(MsanUnitTests "Msan-${arch}${kind}-Test" ${arch}
     OBJECTS ${MSAN_TEST_OBJECTS} "${MSAN_LIBCXX_DIR}/libc++.a" "${MSAN_LIBCXX_DIR}/libc++abi.a"

compiler-rt/lib/tsan/CMakeLists.txt

@@ -31,7 +31,7 @@ if(COMPILER_RT_LIBCXX_PATH AND
       DEPS ${TSAN_RUNTIME_LIBRARIES}
       CFLAGS ${TARGET_CFLAGS} -fsanitize=thread
       USE_TOOLCHAIN)
-    list(APPEND libcxx_tsan_deps libcxx_tsan_${arch}-build)
+    list(APPEND libcxx_tsan_deps libcxx_tsan_${arch}-install)
   endforeach()
 
   add_custom_target(libcxx_tsan DEPENDS ${libcxx_tsan_deps})

libcxxabi/CMakeLists.txt

@@ -86,12 +86,6 @@ set(LIBCXXABI_STATIC_OUTPUT_NAME "c++abi" CACHE STRING "Output name for the stat
 
 set(LIBCXXABI_INSTALL_INCLUDE_DIR "${CMAKE_INSTALL_INCLUDEDIR}/c++/v1" CACHE STRING "Path to install the libc++abi headers at.")
 
-if(LLVM_LIBRARY_OUTPUT_INTDIR)
-  set(LIBCXXABI_GENERATED_INCLUDE_DIR "${LLVM_BINARY_DIR}/include/c++/v1")
-else()
-  set(LIBCXXABI_GENERATED_INCLUDE_DIR "${CMAKE_BINARY_DIR}/include/c++/v1")
-endif()
-
 set(LIBCXXABI_LIBCXX_LIBRARY_PATH "" CACHE PATH "The path to libc++ library.")
 set(LIBCXXABI_LIBRARY_VERSION "1.0" CACHE STRING
 "Version of libc++abi. This will be reflected in the name of the shared \

libcxxabi/include/CMakeLists.txt

@@ -3,20 +3,7 @@ set(files
   cxxabi.h
   )
 
-foreach(f ${files})
-  set(src "${CMAKE_CURRENT_SOURCE_DIR}/${f}")
-  set(dst "${LIBCXXABI_GENERATED_INCLUDE_DIR}/${f}")
-  add_custom_command(OUTPUT ${dst}
-    DEPENDS ${src}
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
-    COMMENT "Copying CXXABI header ${f}")
-  list(APPEND _all_includes "${dst}")
-endforeach()
-
-add_custom_target(generate-cxxabi-headers ALL DEPENDS ${_all_includes})
-
 add_library(cxxabi-headers INTERFACE)
-add_dependencies(cxxabi-headers generate-cxxabi-headers)
 target_include_directories(cxxabi-headers INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}")
 
 if (LIBCXXABI_INSTALL_HEADERS)