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ENH: Add "if(POLICY policy-id)" option for IF command.

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- This will help projects support multiple CMake versions.
  - In order to set a policy when using a newer CMake but still
    working with an older CMake one may write
      if(POLICY CMP1234)
        cmake_policy(SET CMP1234 NEW)
      endif(POLICY CMP1234)
  - Note that since CMake 2.4 does not have if(POLICY) supporting
    it will also require using "if(COMMAND cmake_policy)"
This commit is contained in:
Brad King
2008-03-20 18:25:59 -04:00
parent 8e2f45c24b
commit a6a673979d
5 changed files with 35 additions and 0 deletions
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Source/cmIfCommand.h
+3
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@@ -139,6 +139,9 @@ public:
" if(COMMAND command-name)\n"
"True if the given name is a command, macro or function that can be "
"invoked.\n"
" if(POLICY policy-id)\n"
"True if the given name is an existing policy "
"(of the form CMP<NNNN>).\n"
" if(EXISTS file-name)\n"
" if(EXISTS directory-name)\n"
"True if the named file or directory exists. "