libio / gen-params and __printf_fp test

[Per Bothner]

David Korn <dkorn@pixelpower.com> writes:

>   Your name is at the top of this file, so I thought I'd ask you about
> one of the tests in it, lines 712-725 (in 2.95.2 release, and probably
> the same in 2.95.3)
> -------------------------------------------------------------------------
> # A little test program to check if __printf_fp is available.

I don't remember this particular test - it may be after my time.

>   Now, on the cross-target I'm developing for (powerpc-wrs-vxworks),
> we don't have printf_fp.  But this test still sets the defines to 1.  This
> is because under vxworks, we always compile with the linker -r flag; the
> C runtime lib. is build into the OS and dynamically linked into our
> applications at runtime.

Yes, I remember these kinds of problems with vxworks.  I consider it
a bug in vxworks's linker (a linker could still check for undefined
symbols, except for the ones built in), be you're stuck with it.
I vaguely remember we had some hooks to override the tests on
specific targets, but I don't remember how, and in any it has
probably all changed by now, or it will libstdc++ v3.
-- 
	--Per Bothner
per@bothner.com   http://www.bothner.com/~per/