Re: Help with AC_ARG_ENABLE, AC_ARG_WITH

[John Calcote]

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Tim Post wrote:
> In my configure.ac, I have added:
> 
> # Check for package options
> AC_ARG_ENABLE(unsafe, [  --enable-unsafe         enable unsafe operation
> [[default=no]]],[
>   if test "$enableval" = no; then
>     ac_enable_unsafe=no
>   else
>     ac_enable_unsafe=yes
>   fi
>   ],[ ac_enable_unsafe=no])
> 
> AC_ARG_WITH(user,[  --with-user             specify the system user],[
>   ac_with_user="$withval"
>   ],[
>   ac_with_user=""
>   ])
> 
> This adds the options to ./configure , however I can't seem to figure
> out how I can get the value of these options when compiling.
> 
> I am not using automake, only the basics ... my .in files simply contain
> the typical @variables@ that are filled with user preferences.

Tim,

If you want to pass these into your Makefile.in templates, use

   AC_SUBST(ac_with_user)

then they'll be available as substitution variables (eg., @ac_with_user@)

If you want to go farther and create cpp macro definitions in your
config.h.in template (automatically if you're using autoheader) then use

   AC_DEFINE(ac_with_user)

They'll then also be available as definitions in config.h.

Regards,
John
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