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[cmake] Handle missing LIBUNWIND_* directories gracefully

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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

llvm-svn: 292018
This commit is contained in:
Michal Gorny 2017-01-14 17:05:16 +00:00
parent 3a1a800128
commit 40180b0360
1 changed files with 6 additions and 2 deletions
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8
libcxxabi/CMakeLists.txt
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@ -479,8 +479,12 @@ if (LIBCXXABI_USE_LLVM_UNWINDER OR LLVM_NATIVE_ARCH MATCHES ARM)
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