[Info-vax] cross tools and CLD scope

[Simon Clubley]

On 2021-10-18, Robert A. Brooks <FIRST.LAST at vmssoftware.com> wrote:
> On 10/18/2021 12:51 PM, David Jones wrote:
>> On Monday, October 18, 2021 at 12:10:04 PM UTC-4, Craig A. Berry wrote:
>>> That's all impressive and scary. Luckily editing .FIRST or the code
>>> that generates it to include the cross tools set-up got me as far as I
>>> can get with that mechanism. Then I was on to cases where code is
>>> generated that needs to be compiled and run natively to probe for
>>> features that will then be used to generate additional code that will
>>> need to be built with the cross tools. It's not going to be pretty.
>> 
>> My solution certainly isn't pretty:
>
> [...] stuff removed
>   
> That seems more complicated than it needs to be
>
> You can remove the cross-build changes this way . . .
>
> @sys$startup:X86_XTOOLS$SYLOGIN.COM "" "" "TRUE"
>
>
> I also build a few layered products whose bootstrap tools need to run
> on the build system, so I'm constantly flipping between native and
> cross builds in the context of a build.
>

Disclaimer: I am more familiar with the gcc approach to building
and using embedded toolchains than I am with the LLVM approach
to building them.

However, I am aware that clang uses target triples to select the
target. Do the VSI cross-compiler toolchains also use target triples
underneath the DCL commands ?

If so, is there any possibility of just invoking the tools directly,
bypassing the DCL commands, and specify the target triple for x86-64
VMS on the command line directly ?

If you could do that, then it may be one way to run both the native
compilers and cross-compilers in one session without having to switch
between them. I've found the following clang documentation for selecting
the target triple:

https://clang.llvm.org/docs/CrossCompilation.html

in case anyone wants to read up about target triples.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.