Re: [Chicken-users] -D arguments vs. chicken-defaults.h

[Brandon J. Van Every]

felix winkelmann wrote:
> On 7/19/06, Brandon J. Van Every <address@hidden> wrote:
> > I believe the ./configure build is driven entirely by -D arguments for
> > INSTALL_HOME etc.  chicken-defaults.h is generated late in the build, is
> > used by very few files, and I believe is always overridden by -D
> > arguments anyways.  This leads me to believe that the form of pathnames
> > in chicken-defaults.h is not to be trusted.  This form, incidentally, 
> > is:
> >
> > #ifndef C_INSTALL_HOME
> > # define C_INSTALL_HOME "/cygdrive/c/Program 
> > Files/cygchicken/share/chicken"
> > #endif
> >
> > I think, possibly, the quotes should be escaped.  But I am not sure.
>
> NO NO NO. The quotes are needed for the C compiler to recognize a literal
> string.

I wasn't sure because I don't know how you actually use C_INSTALL_HOME 
and company when generating C code.  And because trial-and-error never 
resulted in provably correct builds.  I will change the convention to 
unescaped quotes. 

> > I do not believe there should be 2 ways of passing around pathnames.
> > One size should fit all, to prevent this kind of devious second
> > guessing.  In the CMake build, I've broken chicken-defaults.h into
> > chicken-paths.h and stack-size.h.  This is because they're determined at
> > different stages of the build.  pathnames are easy to determine at
> > configuration time and do not change.  The stack size may depend on the
> > result of nursery sampling, and if so can only be determined at build
> > time, after a lot of other stuff has been built.
>
> Yes, that makes sense.

In time, the chicken-paths.h.in and stack-size.h.in files can be used by 
the ./configure build.  They use simple variable substitutions like 
@DEFAULT_TARGET_STACK_SIZE@

> > This lends credence to the "quotes should be escaped" theory.
>
> No. Please consult your favorite C textbook.

How about I consult my favorite Chicken build?  If it were as easy as 
RTFM I would have had this solved a month ago.


Cheers,
Brandon Van Every