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ENH: Prevent cmake in source builds (#1091)

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* ENH: Prevent cmake in source builds

Building directly inside the root of the source tree
can cause problems where the build intermediate files
overwrite or conflict with the intended source code
files.

This modification identifies this problem and
issues failure messages and suggestions to over
come the problem with more robust build suggestion.

Co-authored-by: Jordan Bayles <jophba@chromium.org>
This commit is contained in:
Hans Johnson
2020-11-06 15:35:51 -06:00
committed by GitHub
parent ceae0e3867
commit 8954092f0a
5 changed files with 67 additions and 4 deletions
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9
include/PreventInBuildInstalls.cmake Normal file
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@@ -0,0 +1,9 @@
string(TOLOWER "${CMAKE_INSTALL_PREFIX}" _PREFIX)
string(TOLOWER "${ITK_BINARY_DIR}" _BUILD)
if("${_PREFIX}" STREQUAL "${_BUILD}")
message(FATAL_ERROR
"The current CMAKE_INSTALL_PREFIX points at the build tree:\n"
" ${CMAKE_INSTALL_PREFIX}\n"
"This is not supported."
)
endif()