Re: [Patch Ada/build] deal with some cross/native cross issues

[Eric Botcazou <ebotcazou@adacore.com>]

> I've been trying to improve the building and testing of Darwin for crosses
> and native crosses.
> 
> This has thrown up a few small glitches in the Ada build stuff (that would
> seem to apply to any build-host-nativeX scenario, not just darwin).  I
> would imagine it would be beneficial to resolve these, since Ada requires
> Ada - a native cross seems like the only realistic way onto a new target.

Thanks for working on this.

> 1. xgnatugn needs to be run on the build system, so needs to be built with
> the build system's gnatmake. I haven't put a canonical prefix on this since
> this doesn't appear to be done elsewhere. Defined as GNATMAKE_FOR_BUILD and
> passed to sub-processes.

Why do you need to pass it to ADA_TOOLS_FLAGS_TO_PASS though?  Just replace 
$(GNATMAKE) with gnatmake.

> 2. Some builds might need to pass LDFLAGS to the gnat* builds.  Appended
> LDFLAGS to GCC_LINK.  Passed on in gnattools/Make.

OK.

> 3. In gnattools, the RTS dir must be for the host and not for the build; 
> This actually only showed up when I tried a cross from a 64bit pointer
> machine to a 32bit pointer one (i.e it is easy for it to go unnoticed).

OK, but don't you need to do the same for gnatmake/gnatbind/gnatlink here?
See gcc-interface/Make-lang.in, line 171 and below, for similar code.

-- 
Eric Botcazou