llvm-version-major

Author: bjacob

llvm/CMakeLists.txt

@@ -28,6 +28,12 @@ if(NOT DEFINED LLVM_VERSION_SUFFIX)
   set(LLVM_VERSION_SUFFIX git)
 endif()
 
+# Export a few LLVM version identifiers for users who use LLVM as a subdir.
+get_directory_property(_LLVM_HAS_PARENT_DIRECTORY PARENT_DIRECTORY)
+if (_LLVM_HAS_PARENT_DIRECTORY)
+  set(LLVM_VERSION_MAJOR "${LLVM_VERSION_MAJOR}" PARENT_SCOPE)
+endif()
+
 if (NOT PACKAGE_VERSION)
   set(PACKAGE_VERSION
     "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}${LLVM_VERSION_SUFFIX}")