From 8aa500e3488e555394c81237643f3dc244c9ba37 Mon Sep 17 00:00:00 2001
From: David Callahan <dcallahan@fb.com>
Date: Thu, 29 Nov 2018 14:57:14 +0000
Subject: [PATCH] inhereit LLVM_ENABLE_LIBXML2

Summary: When building in an LLVM context, we should respect its LLVM_ENABLE_LIBXML2 option.

Reviewers: vitalybuka, mspertus, modocache

Reviewed By: modocache

Subscribers: mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D53212

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@347870 91177308-0d34-0410-b5e6-96231b3b80d8
---
 CMakeLists.txt | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9af43440b4..c2016a45ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,6 +103,7 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
   option(LLVM_FORCE_USE_OLD_HOST_TOOLCHAIN
     "Set to ON to force using an old, unsupported host toolchain." OFF)
   option(CLANG_ENABLE_BOOTSTRAP "Generate the clang bootstrap target" OFF)
+  option(LLVM_ENABLE_LIBXML2 "Use libxml2 if available." ON)
 
   include(AddLLVM)
   include(TableGen)
@@ -198,13 +199,15 @@ endif()
 # we can include cmake files from this directory.
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
 
-# Don't look for libxml if we're using MSan, since uninstrumented third party
-# code may call MSan interceptors like strlen, leading to false positives.
-if(NOT LLVM_USE_SANITIZER MATCHES "Memory.*")
-  set (LIBXML2_FOUND 0)
-  find_package(LibXml2 2.5.3 QUIET)
-  if (LIBXML2_FOUND)
-    set(CLANG_HAVE_LIBXML 1)
+if(LLVM_ENABLE_LIBXML2)
+  # Don't look for libxml if we're using MSan, since uninstrumented third party
+  # code may call MSan interceptors like strlen, leading to false positives.
+  if(NOT LLVM_USE_SANITIZER MATCHES "Memory.*")
+    set (LIBXML2_FOUND 0)
+    find_package(LibXml2 2.5.3 QUIET)
+    if (LIBXML2_FOUND)
+      set(CLANG_HAVE_LIBXML 1)
+    endif()
   endif()
 endif()
 
-- 
2.40.0