[CMake] issue with FindSDL defining SDL_FOUND to FALSE after finding it (CMake 2.6.0 RC9)

[Philip Lowman]

I'm having an issue with the FindSDL.cmake module included with CMake 2.6.0
RC9 (testing on Windows)

For some reason immediately after it "finds" or you help it find the SDL, if
you configure again, SDL_FOUND gets changed from TRUE to FALSE.  I believe
this is being caused by SDL_LIBRARY_TEMP being set to empty (and cache
internal).

Reproducer:


PROJECT(foo)
FIND_PACKAGE(SDL)
IF(SDL_FOUND)
    MESSAGE("SDL was found!")
ELSE()
    MESSAGE("SDL NOT found!")
ENDIF()

-- 
Philip Lowman
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