patches/Add-a-new-library-libclang-cxx.patch

From 4f0a9674ccc4840e6c4e855aff8f982406d88fc7 Mon Sep 17 00:00:00 2001
From: Pirama Arumuga Nainar <pirama@google.com>
Date: Wed, 1 May 2019 13:55:14 -0700
Subject: Add a new library, libclang-cxx

Squashed CL of the following CLs:
  f10485c  Add a new library, libclang-cxx
  9e97b1d  Add empty file to silence CMake warning
  da2ec10  Link clangIndex and clangTooling to libclang_cxx
  d9424f3  Add exported symbol list for libclang_cxx

aosp/872802
Bug: 139945549

Change-Id: I7e9d2d7b170554f43be89e4470f81f4785b08320
---
 clang/tools/CMakeLists.txt                    |  1 +
 clang/tools/libclang-cxx/CMakeLists.txt       | 88 +++++++++++++++++++
 clang/tools/libclang-cxx/libclang_cxx.cpp     |  7 ++
 clang/tools/libclang-cxx/libclang_cxx.exports |  1 +
 4 files changed, 97 insertions(+)
 create mode 100644 clang/tools/libclang-cxx/CMakeLists.txt
 create mode 100644 clang/tools/libclang-cxx/libclang_cxx.cpp
 create mode 100644 clang/tools/libclang-cxx/libclang_cxx.exports

diff --git a/clang/tools/CMakeLists.txt b/clang/tools/CMakeLists.txt
index 223f1f74f3f..1197b5793de 100644
--- a/clang/tools/CMakeLists.txt
+++ b/clang/tools/CMakeLists.txt
@@ -39,3 +39,4 @@ add_llvm_external_project(clang-tools-extra extra)
 
 # libclang may require clang-tidy in clang-tools-extra.
 add_clang_subdirectory(libclang)
+add_clang_subdirectory(libclang-cxx)
diff --git a/clang/tools/libclang-cxx/CMakeLists.txt b/clang/tools/libclang-cxx/CMakeLists.txt
new file mode 100644
index 00000000000..04cf404b667
--- /dev/null
+++ b/clang/tools/libclang-cxx/CMakeLists.txt
@@ -0,0 +1,88 @@
+set(SOURCES
+  libclang_cxx.cpp
+  )
+
+set(LIBS
+  clangBasic
+  clangCodeGen
+  clangDriver
+  clangFrontend
+  clangFrontendTool
+  clangIndex
+  clangTooling
+)
+
+if (CLANG_ENABLE_ARCMT)
+  list(APPEND LIBS clangARCMigrate)
+endif ()
+
+if (TARGET clangTidyPlugin)
+  add_definitions(-DCLANG_TOOL_EXTRA_BUILD)
+  list(APPEND LIBS clangTidyPlugin)
+  list(APPEND LIBS clangIncludeFixerPlugin)
+  if(LLVM_ENABLE_MODULES)
+    list(APPEND LLVM_COMPILE_FLAGS "-fmodules-ignore-macro=CLANG_TOOL_EXTRA_BUILD")
+  endif()
+endif ()
+
+find_library(DL_LIBRARY_PATH dl)
+if (DL_LIBRARY_PATH)
+  list(APPEND LIBS dl)
+endif()
+
+if(NOT WIN32)
+  set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/libclang_cxx.exports)
+endif()
+
+if( LLVM_ENABLE_PIC )
+  set(ENABLE_SHARED SHARED)
+endif()
+
+if(NOT LLVM_ENABLE_PIC AND NOT WIN32)
+  set(ENABLE_STATIC STATIC)
+endif()
+
+if(WIN32)
+  set(output_name "libclang_cxx")
+else()
+  set(output_name "clang_cxx")
+endif()
+
+if(("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") OR (MINGW))
+  set(LIBS -Wl,--whole-archive ${LIBS} -Wl,--no-whole-archive)
+elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
+  set(LIBS -Wl,-all_load ${LIBS})
+endif()
+
+add_clang_library(libclang_cxx ${ENABLE_SHARED} ${ENABLE_STATIC}
+  OUTPUT_NAME ${output_name}
+  ${SOURCES}
+  LINK_LIBS
+  ${LIBS}
+  )
+
+if(ENABLE_SHARED)
+  if(WIN32)
+    set_target_properties(libclang_cxx
+      PROPERTIES
+      VERSION ${LIBCLANG_LIBRARY_VERSION}
+      DEFINE_SYMBOL _CINDEX_LIB_)
+  elseif(APPLE)
+      set(LIBCLANG_CXX_LINK_FLAGS " -Wl,-compatibility_version -Wl,1")
+      set(LIBCLANG_CXX_LINK_FLAGS "${LIBCLANG_CXX_LINK_FLAGS} -Wl,-current_version -Wl,${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}")
+
+    set_property(TARGET libclang_cxx APPEND_STRING PROPERTY
+        LINK_FLAGS ${LIBCLANG_CXX_LINK_FLAGS})
+  else()
+    set_target_properties(libclang_cxx
+      PROPERTIES
+      VERSION ${LIBCLANG_LIBRARY_VERSION}
+      DEFINE_SYMBOL _CINDEX_LIB_)
+    # FIXME: _CINDEX_LIB_ affects dllexport/dllimport on Win32.
+    if(LLVM_ENABLE_MODULES AND NOT WIN32)
+      target_compile_options(libclang_cxx PRIVATE
+        "-fmodules-ignore-macro=_CINDEX_LIB_"
+        )
+    endif()
+  endif()
+endif()
diff --git a/clang/tools/libclang-cxx/libclang_cxx.cpp b/clang/tools/libclang-cxx/libclang_cxx.cpp
new file mode 100644
index 00000000000..ef6a015b998
--- /dev/null
+++ b/clang/tools/libclang-cxx/libclang_cxx.cpp
@@ -0,0 +1,7 @@
+//===- libclang_cxx.cpp - libclang_cxx Shared Library -----------------------------------===//
+//===----------------------------------------------------------------------===//
+//
+// This file is empty and serves only the purpose of making CMake happy because
+// you can't define a target with no sources.
+//
+//===----------------------------------------------------------------------===//
diff --git a/clang/tools/libclang-cxx/libclang_cxx.exports b/clang/tools/libclang-cxx/libclang_cxx.exports
new file mode 100644
index 00000000000..3ffc06476e3
--- /dev/null
+++ b/clang/tools/libclang-cxx/libclang_cxx.exports
@@ -0,0 +1 @@
+_Z*clang*
-- 
2.25.0.341.g760bfbb309-goog