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[CMake] Fix typo: "in-tree" -> "in-source" (NFC)

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Summary:
*In-source builds* of LLVM, in which a user invokes `cmake` from within the
LLVM source directory, or invokes `cmake -B/path/to/source/dir/of/llvm`,
are explicitly checked for and disallowed by LLVM's `CMakeLists.txt`.

*In-tree builds*, on the other hand, refer to when the source directories
of projects such as Clang are nested within the `llvm/tools` source
directory. These are not disallowed, and are in fact a common way of
building LLVM and Clang.

Revise the comment to match the logic underneath it: it checks for an
"in-source build", not an "in-tree build".

Reviewers: beanz

Reviewed By: beanz

Subscribers: mgorny

Differential Revision: https://reviews.llvm.org/D38317

llvm-svn: 314348
This commit is contained in:
Brian Gesiak 2017-09-27 21:37:33 +00:00
parent 0e8c8d4830
commit 044afc7f97
1 changed files with 1 additions and 1 deletions
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CMakeLists.txt
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@ -237,7 +237,7 @@ endif()
include(CPack)
# Sanity check our source directory to make sure that we are not trying to
# generate an in-tree build (unless on MSVC_IDE, where it is ok), and to make
# generate an in-source build (unless on MSVC_IDE, where it is ok), and to make
# sure that we don't have any stray generated files lying around in the tree
# (which would end up getting picked up by header search, instead of the correct
# versions).