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Merge topic 'if-sanity'

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858d5a0b Fix if() checks of CMAKE_SYSTEM_NAME on Cygwin
e177e7af FPHSA: Avoid if() dereferencing of quoted variable
425acc52 cmcurl: Use if(DEFINED) to simplify conditions
cede5cbd libarchive: Avoid depending on if() to dereference a quoted variable
2d97178b FindGTK2: Avoid depending on if() to dereference a quoted variable
0b12815d Modules/Test*.cmake: Use if(DEFINED) to simplify conditions
188a1f23 If: Introduce policy CMP0054 - don't dereference quoted variables in if()
b900c1cc If: Extract cmConditionEvaluator from if() implementation
This commit is contained in:
Brad King
2014-09-15 10:27:36 -04:00
committed by CMake Topic Stage
parent 78884b6eff 858d5a0b3e
commit 9edf6903e6
55 changed files with 1578 additions and 742 deletions
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6
Help/command/if.rst
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@@ -199,3 +199,9 @@ above-documented signature accepts ``<variable|string>``:
* The left and right hand arguments to ``AND`` and ``OR`` are independently
tested to see if they are boolean constants, if so they are used as
such, otherwise they are assumed to be variables and are dereferenced.
To prevent ambiguity, potential variable or keyword names can be
specified in a :ref:`Quoted Argument` or a :ref:`Bracket Argument`.
A quoted or bracketed variable or keyword will be interpreted as a
string and not dereferenced or interpreted.
See policy :policy:`CMP0054`.