Re: List of FTBFS in Ubuntu
On Fri, Dec 3, 2010 at 11:22 PM, Roger Leigh <rleigh@codelibre.net> wrote:
>> > The header is just a text file. It doesn't contain any library
>> > dependency information (or version information) at all, and there's
>>
>> boost/version.hpp
>
> We only care about SONAME versions, not release versions, and we only
> need to care about what is available to the linker, and headers aren't.
The header file forwards it to the link via the pragma.
>> > no way to associate a given header with any shared library at all.
>>
>> boost\filesystem\v3\config.hpp
>> boost/config/auto_link.hpp
>
> These are using proprietary vendor-specific #pragmas. It's pretty
True, but IMO the concept seems pretty useful.
Why do you think it's horrible? It appears to work well.
> horrible, not to mention fragile--if any header fails to include the
> correct bits of magic, it all falls apart. If they had spent just
> a fraction of the time implementing that to support pkg-config, we
> wouldn't have a problem.
g++ and MSVC don't use pkg-config (AFAIK).
So the complexity is pushed down instead of up.
> OTOH, that mechanism could feasibly be adapted to report the
> library dependencies of the headers to auto-generate the necessary
> pkg-config files, should anyone have the time to implement that
> in auto_link.hpp and write a few tiny programs to spit out the
> information.
Olaf
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