[PATCH] D29573: [libunwind][CMake] Use libc++ headers when available

[Petr Hosek via Phabricator via llvm-commits]

phosek created this revision.
Herald added a subscriber: mgorny.

libunwind depends on C++ library headers. When building libunwind as part of LLVM and libc++ is available, use its headers.


Repository:
  rL LLVM

https://reviews.llvm.org/D29573

Files:
  CMakeLists.txt


Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -282,4 +282,21 @@
 
 include_directories(include)
 
+find_path(
+  LIBUNWIND_LIBCXX_INCLUDES_INTERNAL
+  __libcpp_version
+  PATHS ${LLVM_MAIN_SRC_DIR}/projects/libcxx/include
+        ${LLVM_MAIN_SRC_DIR}/runtimes/libcxx/include
+  NO_DEFAULT_PATH
+)
+if ((NOT LIBUNWIND_STANDALONE_BUILD OR HAVE_LIBCXX) AND
+    IS_DIRECTORY "${LIBUNWIND_LIBCXX_INCLUDES_INTERNAL}")
+  set(LIBUNWIND_CXX_INCLUDE_PATHS "${LIBUNWIND_LIBCXX_INCLUDES_INTERNAL}")
+endif()
+
+set(LIBUNWIND_CXX_INCLUDE_PATHS "${LIBUNWIND_CXX_INCLUDE_PATHS}" CACHE PATH
+    "Paths to C++ header directories separated by ';'." FORCE)
+
+include_directories("${LIBUNWIND_CXX_INCLUDE_PATHS}")
+
 add_subdirectory(src)


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