Re: finding the value of a preprocessor symbol

[John Calcote]

Hi David,

On 1/21/2010 4:38 PM, David Byron wrote:
> Let's say I have a header file named foo.h that contains:
>
> #define FOO an_interesting_value
>
> (I think) I'm looking for a macro like this:
>
> AC_GET_VALUE([foo.h],[FOO])
>
> that populates ac_cv_value_of_FOO with an_interesting_value
>    

This is totally not portable, but...

$ cpp -dM foo.h | grep FOO
#define FOO an_interesting_value

A little string manipulation will put the value in a shell variable.

John