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[cmake] Include project name in Sphinx doctree dir to fix race conditions

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Modify add_sphinx_target() to include the project name alongside builder
in Sphinx doctree directory. This aims to avoid crashes due to race
conditions between multiple Sphinx instances running in parallel that
attempt to create or read that directory simultaneously.

This problem has originally been addressed in r283188. However, that
commit presumed that there will be only one target per builder being
run. However, r314863 introduced a second manpage target, reintroducing
the race condition.

Differential Revision: https://reviews.llvm.org/D40656

llvm-svn: 319461
This commit is contained in:
Michal Gorny 2017-11-30 19:09:22 +00:00
parent 9ecb33edbe
commit b661757cd1
1 changed files with 1 additions and 1 deletions
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2
llvm/cmake/modules/AddSphinxTarget.cmake
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@ -19,7 +19,7 @@ endif()
# ``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 "${CMAKE_CURRENT_BINARY_DIR}/_doctrees-${builder}")
set(SPHINX_DOC_TREE_DIR "${CMAKE_CURRENT_BINARY_DIR}/_doctrees-${project}-${builder}")
set(SPHINX_TARGET_NAME docs-${project}-${builder})
if (SPHINX_WARNINGS_AS_ERRORS)