From: arne@vajhoej.dk
On 9/1/2025 5:00 PM, Simon Clubley wrote:
> On 2025-09-01, Waldek Hebisch wrote:
>> Simon Clubley wrote:
>>> When I talked about bits missing, I wasn't thinking about the headers
>>> and libraries. Given that Adacore didn't start using Newlib or something
>>> similar to support VMS, that was pretty much expected.
>>>
>>> I was thinking more about bits missing within the compiler or binutils
>>> itself, especially given the crashes I had with Fortran. I was wondering
>>> if, for example, there are bits missing in the image initialisation
>>> sequence, along with other similar types of missing bits.
>>
>> Do you have any indications that gcc Fortran or C++ worked on VMS say 25
>> years ago? Presumably Ada Core cared mostly about Ada. To build Ada
>> compiler they needed to build C compiler first. I do not know if they
>> ever supported on VMS gcc version recent enough to require C++ to build.
>> If C++ and/or Fortran was never supported, then missing pieces in runtime
>> support are expected. Also, there may be new pieces of platform support
>> needed by newer compiler versions, that nobody bothered to add for VMS.
>
> I do not know about Fortran, but C++ used to work IIRC, and Arne
> appears to be confirming that as well. I cannot remember if I tried
> C++ but I have a vague memory I did and had similar problems to Fortran,
> but it's long enough ago that I may be wrong about that.
Note that the 2.8.x stuff used VMS LINK.
$ gccl*ink :== @gccbetadir:[000000]gcclink.com
$ gxxl*ink :== @gccbetadir:[000000]gxxlink.com
gcclink.com:
$ link 'p1', -
gnu_cc_library:libgcc.olb/library, -
gnu_cc_library:crt0.obj
$ exit
gxxlink.com:
$ if p2 .eqs. ""
$ then
$ link/exe='f$parse(p1,,,"NAME")' gnu_cc_library:crtbegin.obj, -
'f$parse(p1,"sys$disk:[].obj")', -
gnu_cc_library:libstdcxx.olb/lib, -
gnu_cc_library:libgccplus.olb/lib, -
gnu_cc_library:libgxx.olb/lib, -
gnu_cc_library:libgcc.olb/lib, -
gnu_cc_library:crtend.obj, -
sys$library:vaxcrtl.olb/lib, -
gnu_cc_library:gxx_main.obj
$ else
$ link/exe='f$parse(p1,,,"NAME")' gnu_cc_library:crtbegin.obj, -
'f$parse(p1,"sys$disk:[].obj")', -
'p2'/lib,-
gnu_cc_library:libstdcxx.olb/lib, -
gnu_cc_library:libgccplus.olb/lib, -
gnu_cc_library:libgxx.olb/lib, -
gnu_cc_library:libgcc.olb/lib, -
gnu_cc_library:crtend.obj, -
sys$library:vaxcrtl.olb/lib, -
gnu_cc_library:gxx_main.obj
$ endif
$ exit
The C++ link needed many more pieces than the C link.
Arne
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