Re: AC_CHECK_DECL+autoheader ==> nothing in config.h.in?

[Derek Robert Price]

Sam Steingold wrote:

> > AC_CHECK_DECLS defines the config.h.in variable automatically. If you
> >
> > want to use AC_CHECK_DECL, yes, you have to use a construct like you
> > mentioned.
> >    
>
> Thank you very much.
> what about <math.h>?
> how do I have <math.h> included during the check for signgam without
> having to define [ACTION-IF-FOUND] and [ACTION-IF-NOT-FOUND] myself?
>  

- Macro: AC_CHECK_DECLS (SYMBOLS, [ACTION-IF-FOUND],
         [ACTION-IF-NOT-FOUND], [INCLUDES = `default-includes'])
    For each of the SYMBOLS (_comma_-separated list), define
    `HAVE_DECL_SYMBOL' (in all capitals) to `1' if SYMBOL is declared,
    otherwise to `0'.  If ACTION-IF-NOT-FOUND is given, it is
    additional shell code to execute when one of the function

... and so on ...

Oh, if you meant to avoid supplying ACTION-IF-FOUND and 
ACTION-IF-NOT-FOUND to AC_CHECK_DECLS, just pass them in empty:

   AC_CHECK_DECLS (signgam, , , [#include <math.h>])

Derek

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