Re: [Nano-devel] supporting enhanced regexes on OS X [patch]

[Mike Frysinger]

On 14 Mar 2016 12:00, Benno Schulenberg wrote:
> --- nano/configure.ac (revision 5734)
> +++ nano/configure.ac (revision )
> @@ -572,6 +572,25 @@
>      fi
>  fi
>  
> +AC_MSG_CHECKING([for REG_ENHANCED flag support])
> +nano_reg_extended="REG_EXTENDED"
> +AC_TRY_RUN([

AC_TRY_RUN should pretty much never be used.  this code snippet is a
great example of that being the case too -- all it's doing is looking
for a define in a header.

> +#include <regex.h>
> +int main(void)
> +{
> +#ifdef REG_ENHANCED
> +    return 0;
> +#else
> +    return 1;
> +#endif
> +}],
> +    AC_MSG_RESULT(yes)
> +    nano_reg_extended="REG_EXTENDED | REG_ENHANCED",
> +    AC_MSG_RESULT(no),
> +    AC_MSG_WARN([*** Can't check for REG_ENHANCED flag support when 
> cross-compiling])
> +)

this should be using AC_CACHE_CHECK & AC_PREPROC_IFELSE instead
-mike

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