Re: finding the value of a preprocessor symbol

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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



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