Remove clang-specific libxml2 check from CMake

clang's own CMake setup handles this as of r210308.

The CMAKE_CROSSCOMPILING special-case will no longer be hard-coded. This was
clearly site-specific to someone's local configuration and should be passed in
at configure time if needed with e.g. -DLIBXML2_LIBRARIES=... (the libxml2
target I tried here doesn't even support liblzma so it's *way* off).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210309 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 2af3fe3c5e0a3319251334ca1aae53c205c6e7cb..b862cebfe09fac672279ba8b389a37ff2e227f32 100755 (executable)
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -298,25 +298,6 @@ else()
   set(ENABLE_PIC 0)
 endif()
 
-find_package(LibXml2)
-if (LIBXML2_FOUND)
-  set(CLANG_HAVE_LIBXML 1)
-  # When cross-compiling, liblzma is not detected as a dependency for libxml2,
-  # which makes linking c-index-test fail. But for native builds, all libraries
-  # are installed and checked by CMake before Makefiles are generated and everything
-  # works according to the plan. However, if a -llzma is added to native builds,
-  # an additional requirement on the static liblzma.a is required, but will not
-  # be checked by CMake, breaking native compilation.
-  # Since this is only pertinent to cross-compilations, and there's no way CMake
-  # can check for every foreign library on every OS, we add the dep and warn the dev.
-  if ( CMAKE_CROSSCOMPILING )
-    if (NOT PC_LIBXML_VERSION VERSION_LESS "2.8.0")
-      message(STATUS "Adding LZMA as a dep to XML2 for cross-compilation, make sure liblzma.a is available.")
-      set(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} "-llzma")
-    endif ()
-  endif ()
-endif ()
-
 check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG)
 
 set(USE_NO_MAYBE_UNINITIALIZED 0)