[cmake] Obtain LLVM_CMAKE_PATH from llvm-config if available
Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config. Fallback to local reconstruction if llvm-config does not
support this option.
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@291506 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2aefd79..05f76ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,8 +49,19 @@
set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
- set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
set(LLVM_LIT_PATH "${LLVM_PATH}/utils/lit/lit.py")
+
+ # --cmakedir is supported since llvm r291218 (4.0 release)
+ execute_process(
+ COMMAND ${LLVM_CONFIG_PATH} --cmakedir
+ RESULT_VARIABLE HAD_ERROR
+ OUTPUT_VARIABLE CONFIG_OUTPUT)
+ if(NOT HAD_ERROR)
+ string(STRIP "${CONFIG_OUTPUT}" LLVM_CMAKE_PATH)
+ else()
+ set(LLVM_CMAKE_PATH
+ "${LLVM_BINARY_DIR}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
+ endif()
else()
message(FATAL_ERROR "llvm-config not found and LLVM_MAIN_SRC_DIR not defined. "
"Reconfigure with -DLLVM_CONFIG_PATH=path/to/llvm-config "
