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Brad King authored
Since commit c8ef6430 (Allow directory names containing '=' and warn if necessary, 2012-02-06) we allow directories with '=' instead of rejecting them as was previously done since commit 8704525f (Reject directory names containing '=', 2011-01-14). However, we did not warn in all cases that '=' may cause failure, such as when it appears on the right-hand side of a dependency line. Both commits above were made assuming that '=' cannot be escaped in Make syntax, but it can be achieved with a variable: EQUALS = = left$(EQUALS)side : right$(EQUALS)side Use this approach to escape '=' in dependency lines, thus supporting the character in paths. All our tests now pass when CMake is built in source and build trees both containing '=', except for the "OutOfSource" test. It fails in its coverage of the obscure "OutOfBinary" test case where part of the build tree is located outside the main build tree of the test. The reason is that CMake must invoke a command like $(MAKE) -f /path/with=sign/build.make /path/with=sign/somefile but the make tool interprets the last argument as a variable assignment. This is an acceptable limitation, since the case is so obscure, in exchange for supporting '=' cleanly otherwise.
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