[CMake] Use explicit header path when using in-tree libc++ for tests

This is a follow up to D118200 which applies a similar cleanup to
headers when using in-tree libc++ to avoid accidentally picking up
the system headers.

Differential Revision: https://reviews.llvm.org/D128035

compiler-rt/CMakeLists.txt

@@ -521,6 +521,17 @@ string(REGEX REPLACE "-stdlib=[a-zA-Z+]*" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}
 list(APPEND COMPILER_RT_COMMON_CFLAGS ${stdlib_flag})
 list(APPEND COMPILER_RT_COMMON_LINK_FLAGS ${stdlib_flag})
 
+# TODO: There's a lot of duplication across lib/*/tests/CMakeLists.txt files,
+# move some of the common flags to COMPILER_RT_UNITTEST_CFLAGS.
+
+# Unittests need access to C++ standard library.
+string(APPEND COMPILER_RT_TEST_COMPILER_CFLAGS " ${stdlib_flag}")
+
+# When cross-compiling, COMPILER_RT_TEST_COMPILER_CFLAGS help in compilation
+# and linking of unittests.
+string(REPLACE " " ";" COMPILER_RT_UNITTEST_CFLAGS "${COMPILER_RT_TEST_COMPILER_CFLAGS}")
+set(COMPILER_RT_UNITTEST_LINK_FLAGS ${COMPILER_RT_UNITTEST_CFLAGS})
+
 if(COMPILER_RT_USE_LLVM_UNWINDER)
   if (COMPILER_RT_ENABLE_STATIC_UNWINDER)
     set(unwinder_target unwind_static)
@@ -583,7 +594,11 @@ if (SANITIZER_TEST_CXX_LIBNAME STREQUAL "libc++")
     else()
       set(cxx_target cxx_shared)
     endif()
-    list(APPEND SANITIZER_TEST_CXX_LIBRARIES "$<$<BOOL:$<TARGET_NAME_IF_EXISTS:${cxx_target}>>:$<TARGET_LINKER_FILE:${cxx_target}>>")
+    list(APPEND SANITIZER_TEST_CXX_LIBRARIES "$<$<TARGET_EXISTS:${cxx_target}>:$<TARGET_LINKER_FILE:${cxx_target}>>")
+    list(APPEND SANITIZER_TEST_CXX_CFLAGS "$<$<TARGET_EXISTS:cxx-headers>:-isystem$<JOIN:$<TARGET_PROPERTY:cxx-headers,INTERFACE_INCLUDE_DIRECTORIES>,$<SEMICOLON>-isystem>>")
+    # We are using the in tree libc++ so avoid including the default one.
+    append_list_if(COMPILER_RT_HAS_NOSTDINCXX_FLAG -nostdinc++ COMPILER_RT_UNITTEST_CFLAGS)
+    append_list_if(COMPILER_RT_HAS_NOSTDLIBXX_FLAG -nostdlib++ COMPILER_RT_UNITTEST_LINK_FLAGS)
   else()
     append_list_if(COMPILER_RT_HAS_LIBCXX -lc++ SANITIZER_TEST_CXX_LIBRARIES)
   endif()
@@ -591,17 +606,6 @@ elseif (SANITIZER_TEST_CXX_LIBNAME STREQUAL "libstdc++")
   append_list_if(COMPILER_RT_HAS_LIBSTDCXX -lstdc++ SANITIZER_TEST_CXX_LIBRARIES)
 endif()
 
-# TODO: There's a lot of duplication across lib/*/tests/CMakeLists.txt files,
-# move some of the common flags to COMPILER_RT_UNITTEST_CFLAGS.
-
-# Unittests need access to C++ standard library.
-string(APPEND COMPILER_RT_TEST_COMPILER_CFLAGS " ${stdlib_flag}")
-
-# When cross-compiling, COMPILER_RT_TEST_COMPILER_CFLAGS help in compilation
-# and linking of unittests.
-string(REPLACE " " ";" COMPILER_RT_UNITTEST_CFLAGS "${COMPILER_RT_TEST_COMPILER_CFLAGS}")
-set(COMPILER_RT_UNITTEST_LINK_FLAGS ${COMPILER_RT_UNITTEST_CFLAGS})
-
 # Unittests support.
 set(COMPILER_RT_GTEST_PATH ${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest)
 set(COMPILER_RT_GTEST_SOURCE ${COMPILER_RT_GTEST_PATH}/src/gtest-all.cc)

compiler-rt/cmake/Modules/CompilerRTCompile.cmake

@@ -106,7 +106,8 @@ function(clang_compile object_file source)
             -o "${object_file}"
             ${source_rpath}
     MAIN_DEPENDENCY ${source}
-    DEPENDS ${SOURCE_DEPS})
+    DEPENDS ${SOURCE_DEPS}
+    COMMAND_EXPAND_LISTS)
 endfunction()
 
 # On Darwin, there are no system-wide C++ headers and the just-built clang is

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

@@ -23,6 +23,7 @@ set(ASAN_UNITTEST_HEADERS
 set(ASAN_UNITTEST_COMMON_CFLAGS
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
+  ${SANITIZER_TEST_CXX_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/asan
@@ -36,7 +37,8 @@ append_list_if(COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG -Wno-variadic-macros ASAN_U
 # This will ensure the target linker is used
 # during cross compilation
 set(ASAN_UNITTEST_COMMON_LINK_FLAGS
-  ${COMPILER_RT_UNITTEST_LINK_FLAGS})
+  ${COMPILER_RT_UNITTEST_LINK_FLAGS}
+  ${SANITIZER_TEST_CXX_LIBRARIES})
 
 # -gline-tables-only must be enough for ASan, so use it if possible.
 if(COMPILER_RT_TEST_COMPILER_ID MATCHES "Clang")

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

@@ -3,6 +3,7 @@ include(CompilerRTCompile)
 set(GWP_ASAN_UNITTEST_CFLAGS
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
+  ${SANITIZER_TEST_CXX_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/lib/
   -O2
   -g
@@ -33,7 +34,9 @@ set(GWP_ASAN_UNIT_TEST_HEADERS
 add_custom_target(GwpAsanUnitTests)
 set_target_properties(GwpAsanUnitTests PROPERTIES FOLDER "Compiler-RT Tests")
 
-set(GWP_ASAN_UNITTEST_LINK_FLAGS ${COMPILER_RT_UNITTEST_LINK_FLAGS} -ldl)
+set(GWP_ASAN_UNITTEST_LINK_FLAGS
+  ${COMPILER_RT_UNITTEST_LINK_FLAGS} -ldl
+  ${SANITIZER_TEST_CXX_LIBRARIES})
 list(APPEND GWP_ASAN_UNITTEST_LINK_FLAGS --driver-mode=g++)
 if(NOT WIN32)
   list(APPEND GWP_ASAN_UNITTEST_LINK_FLAGS -pthread)

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

@@ -13,6 +13,7 @@ set(INTERCEPTION_TEST_HEADERS)
 set(INTERCEPTION_TEST_CFLAGS_COMMON
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
+  ${SANITIZER_TEST_CXX_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/interception
@@ -21,7 +22,8 @@ set(INTERCEPTION_TEST_CFLAGS_COMMON
   -Werror=sign-compare)
 
 set(INTERCEPTION_TEST_LINK_FLAGS_COMMON
-  ${COMPILER_RT_UNITTEST_LINK_FLAGS})
+  ${COMPILER_RT_UNITTEST_LINK_FLAGS}
+  ${SANITIZER_TEST_CXX_LIBRARIES})
 
 # -gline-tables-only must be enough for these tests, so use it if possible.
 if(COMPILER_RT_TEST_COMPILER_ID MATCHES "Clang")

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

@@ -6,6 +6,7 @@ set(MEMPROF_UNITTEST_CFLAGS
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
   ${COMPILER_RT_GMOCK_CFLAGS}
+  ${SANITIZER_TEST_CXX_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/lib/
   -O2
   -g

compiler-rt/lib/orc/unittests/CMakeLists.txt

@@ -37,7 +37,7 @@ set(ORC_TEST_ARCH ${ORC_SUPPORTED_ARCH})
 set(ORC_UNITTEST_LINK_FLAGS
   ${COMPILER_RT_UNITTEST_LINK_FLAGS}
   ${CMAKE_THREAD_LIBS_INIT}
-  ${SANITIZER_TEST_CXX_LIBRARIES}
+  ${COMPILER_RT_CXX_LINK_LIBS}
   )
 
 if(APPLE)

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

@@ -62,6 +62,7 @@ set(SANITIZER_TEST_CFLAGS_COMMON
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
   ${COMPILER_RT_GMOCK_CFLAGS}
+  ${SANITIZER_TEST_CXX_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/sanitizer_common
@@ -71,7 +72,9 @@ set(SANITIZER_TEST_CFLAGS_COMMON
   -Wno-gnu-zero-variadic-macro-arguments
   )
 
-set(SANITIZER_TEST_LINK_FLAGS_COMMON ${COMPILER_RT_UNITTEST_LINK_FLAGS})
+set(SANITIZER_TEST_LINK_FLAGS_COMMON
+  ${COMPILER_RT_UNITTEST_LINK_FLAGS}
+  ${SANITIZER_TEST_CXX_LIBRARIES})
 
 # -gline-tables-only must be enough for these tests, so use it if possible.
 if(COMPILER_RT_TEST_COMPILER_ID MATCHES "Clang")

compiler-rt/lib/scudo/standalone/tests/CMakeLists.txt

@@ -7,6 +7,7 @@ set_target_properties(ScudoUnitTests PROPERTIES
 set(SCUDO_UNITTEST_CFLAGS
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
+  ${SANITIZER_TEST_CXX_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/scudo/standalone
@@ -33,15 +34,14 @@ endif()
 set(SCUDO_TEST_ARCH ${SCUDO_STANDALONE_SUPPORTED_ARCH})
 
 # gtests requires c++
-set(LINK_FLAGS
+set(SCUDO_UNITTEST_LINK_FLAGS
   ${COMPILER_RT_UNITTEST_LINK_FLAGS}
-  ${SANITIZER_TEST_CXX_LIBRARIES}
-  )
-list(APPEND LINK_FLAGS -pthread -no-pie)
+  ${SANITIZER_TEST_CXX_LIBRARIES})
+list(APPEND SCUDO_UNITTEST_LINK_FLAGS -pthread -no-pie)
 # Linking against libatomic is required with some compilers
 check_library_exists(atomic __atomic_load_8 "" COMPILER_RT_HAS_LIBATOMIC)
 if (COMPILER_RT_HAS_LIBATOMIC)
-  list(APPEND LINK_FLAGS -latomic)
+  list(APPEND SCUDO_UNITTEST_LINK_FLAGS -latomic)
 endif()
 
 set(SCUDO_TEST_HEADERS
@@ -76,7 +76,7 @@ macro(add_scudo_unittest testname)
         DEPS llvm_gtest scudo_standalone
         RUNTIME ${RUNTIME}
         CFLAGS ${SCUDO_UNITTEST_CFLAGS}
-        LINK_FLAGS ${LINK_FLAGS})
+        LINK_FLAGS ${SCUDO_UNITTEST_LINK_FLAGS})
     endforeach()
   endif()
 endmacro()

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

@@ -7,6 +7,7 @@ set_target_properties(TsanUnitTests PROPERTIES
 set(TSAN_UNITTEST_CFLAGS
   ${COMPILER_RT_UNITTEST_CFLAGS}
   ${COMPILER_RT_GTEST_CFLAGS}
+  ${SANITIZER_TEST_CXX_CFLAGS}
   -I${COMPILER_RT_SOURCE_DIR}/include
   -I${COMPILER_RT_SOURCE_DIR}/lib
   -I${COMPILER_RT_SOURCE_DIR}/lib/tsan/rtl
@@ -24,10 +25,9 @@ append_list_if(COMPILER_RT_HAS_MSSE4_2_FLAG -msse4.2 TSAN_UNITTEST_CFLAGS)
 
 set(TSAN_TEST_ARCH ${TSAN_SUPPORTED_ARCH})
 
-set(LINK_FLAGS
+set(TSAN_UNITTEST_LINK_FLAGS
   ${COMPILER_RT_UNITTEST_LINK_FLAGS}
-  ${SANITIZER_TEST_CXX_LIBRARIES}
-  )
+  ${SANITIZER_TEST_CXX_LIBRARIES})
 
 if(APPLE)
 
@@ -48,13 +48,13 @@ if(APPLE)
   darwin_filter_host_archs(TSAN_SUPPORTED_ARCH TSAN_TEST_ARCH)
   list(APPEND TSAN_UNITTEST_CFLAGS ${DARWIN_osx_CFLAGS})
 
-  list(APPEND LINK_FLAGS ${DARWIN_osx_LINK_FLAGS})
-  add_weak_symbols("ubsan" LINK_FLAGS)
-  add_weak_symbols("sanitizer_common" LINK_FLAGS)
+  list(APPEND TSAN_UNITTEST_LINK_FLAGS ${DARWIN_osx_LINK_FLAGS})
+  add_weak_symbols("ubsan" TSAN_UNITTEST_LINK_FLAGS)
+  add_weak_symbols("sanitizer_common" TSAN_UNITTEST_LINK_FLAGS)
 else()
-  list(APPEND LINK_FLAGS -fsanitize=thread)
-  list(APPEND LINK_FLAGS -lm)
-  list(APPEND LINK_FLAGS ${COMPILER_RT_TEST_LIBDISPATCH_CFLAGS})
+  list(APPEND TSAN_UNITTEST_LINK_FLAGS -fsanitize=thread)
+  list(APPEND TSAN_UNITTEST_LINK_FLAGS -lm)
+  list(APPEND TSAN_UNITTEST_LINK_FLAGS ${COMPILER_RT_TEST_LIBDISPATCH_CFLAGS})
 endif()
 
 set(TSAN_RTL_HEADERS)
@@ -83,7 +83,7 @@ macro(add_tsan_unittest testname)
         COMPILE_DEPS ${TEST_HEADERS} ${TSAN_RTL_HEADERS}
         DEPS ${TSAN_DEPS}
         CFLAGS ${TSAN_UNITTEST_CFLAGS}
-        LINK_FLAGS ${LINK_FLAGS})
+        LINK_FLAGS ${TSAN_UNITTEST_LINK_FLAGS})
     endforeach()
   endif()
 endmacro()

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

@@ -50,7 +50,7 @@ set(XRAY_TEST_ARCH ${XRAY_SUPPORTED_ARCH})
 set(XRAY_UNITTEST_LINK_FLAGS
   ${COMPILER_RT_UNITTEST_LINK_FLAGS}
   ${CMAKE_THREAD_LIBS_INIT}
-  ${SANITIZER_TEST_CXX_LIBRARIES}
+  ${COMPILER_RT_CXX_LINK_LIBS}
   )
 
 if (NOT APPLE)