From: Michal Gorny <mgorny@gentoo.org>
Date: Tue, 4 Oct 2016 06:09:14 +0000 (+0000)
Subject: [cmake] Use separate doctrees to prevent races between Sphinx instances
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=40960f63616f62c8ac52eeeddf68bdb441b8be3e;p=llvm

[cmake] Use separate doctrees to prevent races between Sphinx instances

Use separate doctrees between different Sphinx builders in order to
prevent race condition issues due to multiple Sphinx instances accessing
the same doctree cache in parallel.

Bug: https://llvm.org/bugs/show_bug.cgi?id=23781

Differential Revision: https://reviews.llvm.org/D23755

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283188 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/cmake/modules/AddSphinxTarget.cmake b/cmake/modules/AddSphinxTarget.cmake
index a968555aa06..ca9f4c38ffd 100644
--- a/cmake/modules/AddSphinxTarget.cmake
+++ b/cmake/modules/AddSphinxTarget.cmake
@@ -6,7 +6,7 @@
 # ``project`` should be the project name
 function (add_sphinx_target builder project)
   set(SPHINX_BUILD_DIR "${CMAKE_CURRENT_BINARY_DIR}/${builder}")
-  set(SPHINX_DOC_TREE_DIR "${CMAKE_CURRENT_BINARY_DIR}/_doctrees")
+  set(SPHINX_DOC_TREE_DIR "${CMAKE_CURRENT_BINARY_DIR}/_doctrees-${builder}")
   set(SPHINX_TARGET_NAME docs-${project}-${builder})
 
   if (SPHINX_WARNINGS_AS_ERRORS)