Re: Defining Macros With Literal Values

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Eric Lemings <lemings@xxxxxxxxxxxxx> writes:

> Greetings,
>
> I have a tricky little problem I was hoping someone could
> help me with.  I am trying to write an Autotools macro that
> extracts the value of a macro from a system header file
> and defines another preprocessor macro with the same value.

You can use AC_DEFINE_UNQUOTED to define a macro to the result of a shell
substitution.  You can easily extract the value from the output of the
preprocessor.  Don't use the output of a compiled program because that
would make cross-compiling impossible.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@xxxxxxx
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."


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