On 03/08/2021 18:44, John Tytgat wrote:
On 8/2/21 9:04 PM, Lee Noar wrote:
Unfortunately, GCC 10 does not support module generation as yet which
is why GCC 4 is still our main compiler.
The problem is that libscl which is the interface to the
SharedCLibrary and what modules are linked against needs to be built
as hard-float+FPA, however, FPA code generation was removed from GCC
some years ago and is no longer supported.
I've not been following the developments the last years but I seem to
(vaguely) remember that all floating point related SharedCLibrary calls
were optional in the stub code so that in non-FPA capable multilib
versions of the build those calls were simple not available. So a, say,
strcpy() was supported, but sin() not. After all floating point using
module code is/was quite rare.
ISTR that FPA floating point couldn't be used in modules, something to
do with modules running in SVC mode and FPA instructions being emulated.
I think VFP is OK though.
Really, what we need is a SharedCLibrary that supports VFP.
And probably also as EABI flavour, not APCS, ie. get rid of the chunked
stack which isn't even used so in SVC mode.
That may be difficult to get implemented in the DDE C compiler! But, yes
that would mean that APCS-32 support wouldn't have to be added to GCC 10
just to support modules.
Lee.
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