ENH: Prevent cmake in source builds (#1091)
* 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>
diff --git a/include/PreventInBuildInstalls.cmake b/include/PreventInBuildInstalls.cmake
new file mode 100644
index 0000000..accfea6
--- /dev/null
+++ b/include/PreventInBuildInstalls.cmake
@@ -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()