On 2013-07-13 17:54, Victor Aurélio Santos wrote:
I'm trying to evaluate a expression "if variable X is defined and Y is ON":
tried this:
if (defined ${GETTEXT_LIB-NOTFOUND} and ${ENABLE_NLS})
For FOO not found, FOO-NOTFOUND gets defined? That'd be news to me...
(Usually I expect FOO-NOTFOUND to be the value of FOO...)
Besides other comments re: case sensitivty, I'd expect to see a check
like this written:
if(NOT GETTEXT_LIB AND ENABLE_NLS)
For the first, I don't know why you'd specifically want to check for
'DEFINED GETTEXT_LIB-NOTFOUND' versus that GETTEXT_LIB is "valid"
('if(FOO)' is false for FOO == FOO-NOTFOUND).
For the second, you probably do not want to expand ENABLE_NLS. Else I
can break your build by doing something like '-DON=OFF'. (Granted that
will probably make all kinds of problems, but in general I wouldn't
expand variables when you want to Boolean-test them, because CMake will
try to expand again the result of expansion.)
--
Matthew
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