[cmake] Handle missing LIBUNWIND_* directories gracefully
Add LIBUNWIND_* directories to include path only if they were actually
found, in order to fix the CMake error. Both of the directories are
usually unnecessary since libcxxabi uses only the common part of
unwind.h that is supplied both by GCC and Clang.
Differential Revision: https://reviews.llvm.org/D25314
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@292018 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ac65392..8f23b7c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -479,8 +479,12 @@
set(LIBCXXABI_LIBUNWIND_SOURCES "")
endif()
- include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}")
- include_directories("${LIBCXXABI_LIBUNWIND_SOURCES}")
+ if (NOT LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL STREQUAL "LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL-NOTFOUND")
+ include_directories("${LIBCXXABI_LIBUNWIND_INCLUDES_INTERNAL}")
+ endif()
+ if (NOT LIBCXXABI_LIBUNWIND_SOURCES STREQUAL "")
+ include_directories("${LIBCXXABI_LIBUNWIND_SOURCES}")
+ endif()
endif()
# Add source code. This also contains all of the logic for deciding linker flags
