Re: Minor portability issues + fixes

> > So probably we'd want something like (in this order):
> > 
> >   - NEEDS_EXPLICIT_STDINT gets passed from the Makefile into the
> >     compiler via -D, which then triggers stdint.h being included
> >     unconditionally in git-compat-util.h
> > 
> >   - optionally set that in config.mak.uname for AIX (checking uname_R
> >     since it sounds like only old versions need it)
> > 
> >   - add an autoconf rule that sets it, either strictly (when a
> >     test-program decides it's needed) or loosely (when we see that it's
> >     available at all)
> > 
> > Even just the first one would let you build by setting the knob
> > manually; the rest is gravy on top, if you or somebody else chooses to
> > do it.
> 
> Hmm... that's a fairly specific knob, which I would think is less than
> ideal. The rest is reasonable, but would have to be written in terms
> of the knob.

> > but it would be nice if the Makefile handled this correctly. It looks
> > like CC_LD_DYNPATH gets used in a lot of places, so I suspect we'd
> > want a Makefile function to help out. Something like:
> > 
> >   # usage: $(call linker_lib,PATH)
> >   # Create linker args for looking for libraries in PATH at both link-time
> >   # and run-time.
> >   linker_lib = -L$1 $(if $(CC_LD_DYNPATH),$(CC_LD_DYNPATH)$1)
> > 
> > which would allow:
> > 
> >   EXTLIBS += $(call linker_lib,$(LIBPCREDIR)/$(lib))
> > 
> > etc. This would be our first foray into Makefile functions, but I think
> > we've determined that most platforms have a recent enough GNU make for
> > it to be OK (and we already require GNU make).
> 
> Why not just a variable to wrap the conditional? Something like
> 
>     CC_LD_DYNPATH_flag = $(if $(CC_LD_DYNPATH),$(CC_LD_DYNPATH),-L)
> 
>     ...
> 
>     EXTLIBS += -L$(ZLIB_PATH)/$(lib) $(CC_LD_DYNPATH_flag)$(ZLIB_PATH)/$(lib)