The version of libxml2 required by c-index-test must be at least 2.5.…

…3. Considering that this version was released in 2003, you might think the check a bit ridiculous. Unfortunately, GnuWin32 ships with libxml2 2.4.12, which was released in 2001.

This allows us to have GnuWin32 on the PATH on Windows without causing compilation errors.

llvm-svn: 244751

clang/CMakeLists.txt

@@ -168,7 +168,7 @@ else()
   set(BACKEND_PACKAGE_STRING "${PACKAGE_STRING}")
 endif()
 
-find_package(LibXml2)
+find_package(LibXml2 2.5.3 QUIET)
 if (LIBXML2_FOUND)
   set(CLANG_HAVE_LIBXML 1)
 endif()