On 08/16/2011 12:26 PM, Marco wrote:
Thanks. I don't need to define another macro based on the value of
%{__foo}. However based on your suggestion, I think I can do this,
which seems to work:
%if %{?__foo:1}%{!?__foo:0}
%if "%{__foo}" == "1"
echo "foo is defined and is 1"
%else
echo "foo is defined, but has some other value: %{__foo}"
%endif
%else
echo "foo is not defined"
%endif
Does this look correct/reliable enough or is there a better way to do
what I'm trying to do? Thanks.
I've never found documentation with the specifics of the %if macro, so
testing to see what works is the best method I know. It seems like the
above works. If you all need "do something" and "skip" block, the below
is less verbose:
%if "%{?__foo:%{__foo}}%{!?__foo:0}" == "1"
echo "foo is defined and is 1"
%else
echo "foo is not defined or not equal to 1"
%endif
Alternatively, you could also define a macro that expands to the "do
something" when needed, and expands to nothing otherwise. I don't know
of simpler way to check equality though (but I'm kind of new to this
stuff too).
Out of curiosity (if you don't mind me asking), why do you need to check
both for definition and equality? What are you trying to do?
- Daniel
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