Benjamin Place wrote:
On Dec 13, 2005, at 1:49 PM, Trevor Harmon wrote:
If I understand what you're asking, and GNAT is used *only* to build
the program, and there is a GNAT package in Fink, you can simply add
this line to the program's .info:
BuildDepends: gnat
Thanks for your response, Trevor.
I don't think there is a GNAT package in Fink, I looked on the Packages
page and didn't find one. It seems to me that the GNAT Ada compiler is
analogous to Apple's DevTools, so therefore GNAT would need to be
represented in Fink by a virtual package.
My reading of Fink's dev docs makes me think that would be *hard*.
Is there another way? Is making a virtual package easier than I think?
No, it is not easy, because the virtual packages you are thinking of are
coded as parts of the fink "kernel", not as actual packages.
But IMHO there is another legitimate possibility, more along the lines
you were thinking of originally: I think you can just write a package
for your project that checks at build time (and again at install time if
there is a runtime depency) whether the macada.org compiler is
installed. If it detects that this is not installed, it errors out and
gives instructions on where to read about installing the macada
compiler. The package DescUsage text would mention that you need to
download and install the macada stuff first before trying to build or
install your package and it would give links to instructions for doing so.
We already have examples of packages that depend on external stuff like
specific commercial fortran compilers or parts of the developer tools
that are not installed by default, and which manage their dependencies
on these external components "by hand", not via virtual packages.
Creating a virtual package would only be justified if there were several
packages using it.
Of course, creating a veritable ada package in Fink would be best, but
it is a major task and not indispensable for what you are trying to do.
--
Martin
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