Brad King 4f2fcce4b9 Check*: Allow result variables to contain regex special characters (#14923)
Prior to the existence of the if(DEFINED) condition, many of our Check
modules implemented the condition with a hack that takes advantage of
the auto-dereference behavior of the if() command to detect if a
variable is defined.  The hack has the form:

 if("${VAR} MATCHES "^${VAR}$")

where "${VAR}" is a macro argument reference.  However, this does not
work when the variable named in the macro argument contains characters
that have special meaning in regular expressions, such as '+'.  Run the
command

 git grep -E 'if\("\$\{.*\}" MATCHES "\^\$\{.*\}\$"\)' -- Modules/Check*

to identify lines with this problem.  Use if(NOT DEFINED) instead.
2014-07-31 09:48:41 -04:00
..
2014-02-25 11:14:06 -05:00
2014-04-15 10:22:34 -04:00

See the "Find Modules" section of the cmake-developer(7) manual page.

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