[CMake] How to test environment variable in IF command

[Mike Talbot]

Ok - thanks, that works.

David Cole wrote:
> When dealing with ENV variable values, you should probably test their 
> contents with something like this:
>
> IF("$ENV{FOO}" STREQUAL "ON")
> ... ... ...
> ENDIF("$ENV{FOO}" STREQUAL "ON")
>
>  --- or ---
>
> SET(myFOO $ENV{FOO})
> IF(myFOO)
> ... ... ...
> ENDIF(myFOO)
>
>
> HTH,
> David
>
>
> On 7/19/07, *Mike Talbot* <mtalbot at abingdon.oilfield.slb.com 
> <mailto:mtalbot at abingdon.oilfield.slb.com>> wrote:
>
>     Hi,
>
>     I'm trying to work out how to test for an environment variable in
>     an IF
>     command, the following doesn't work:
>
>     SET(ENV{FOO} ON)
>     MESSAGE("FOO = $ENV{FOO}")    # prints "FOO = ON"
>     IF(ENV{FOO})
>       MESSAGE("FOO is set")
>     ENDIF(ENV{FOO})
>
>     Does anyone know what the right syntax for doing this is, please?
>
>     Thanks,
>     Mike
>
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