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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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Tests/ComplexRelativePaths/CMakeLists.txt
+5
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@@ -4,6 +4,11 @@
SET(CMAKE_BACKWARDS_COMPATIBILITY 1.4)
PROJECT (Complex)
# Try setting a new policy. The IF test is for coverage.
IF(POLICY CMP0003)
CMAKE_POLICY(SET CMP0003 NEW)
ENDIF(POLICY CMP0003)
# Choose whether to test CMakeLib.
SET(COMPLEX_TEST_CMAKELIB 1)
IF(CMAKE_TEST_DIFFERENT_GENERATOR)