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Create CMake Policy CMP0015 to fix set(CACHE)

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The set(CACHE) and option() commands should always expose the cache
value.  Previously we failed to expose the value when it was already set
if a local variable definition hid it.  When set to NEW, this policy
tells the commands to always remove the local variable definition to
expose the cache value.  See issue #9008.
This commit is contained in:
Brad King
2009-09-10 16:59:45 -04:00
parent afbe088309
commit ee2b446c95
7 changed files with 94 additions and 2 deletions
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Source/cmSetCommand.h
+4 -2
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@@ -69,8 +69,10 @@ public:
" set(<variable> <value>\n"
" [[CACHE <type> <docstring> [FORCE]] | PARENT_SCOPE])\n"
"Within CMake sets <variable> to the value <value>. <value> is expanded"
" before <variable> is set to it. If CACHE is present, then the "
"<variable> is put in the cache. <type> and <docstring> are then "
" before <variable> is set to it. If CACHE is present and <variable> "
"is not yet in the cache, then <variable> is put in the cache. If it is "
"already in the cache, <variable> is assigned the value stored in the "
"cache. If CACHE is present, also <type> and <docstring> are "
"required. <type> is used by the CMake GUI to choose a widget with "
"which the user sets a value. The value for <type> may be one of\n"
" FILEPATH = File chooser dialog.\n"