Bug#1143851: hppa-linux-gnu-gcc does not honor -ffreestanding, generating referencs to memset

On 8/12/26 23:08, John David Anglin wrote:
> On 2026-08-12 3:45 p.m., Michael Tokarev wrote:
>>> At the moment, I would say hppa is not compatible with -fwhole-program.  The
>>> simplest fix might be to add "_attribute__((used, externally_visible))" to the memcpy
>>> declaration in your code.
>>
>> And this one helps to finish the build, and it finishes successfully.
> 
> Excellent!
>>> This what google said about this:
>>> [...]
>> I see. It's a fun stuff.
>>
>> So, for the time being, I'm including this workaround.  For the future, I
>> guess something has to be done with the build system to avoid -fwhole-program
>> (Cc'ing Helge Deller).
> 
> When I get a chance, I will look at making memcpy and millicode calls externally visible.
> 
> It would be useful to know what code results in the call to memcpy.  This seems a bug in
> gcc's -fwhole-program support.
> 
> Avoiding millicode calls is likely tricky as they are used for integer multiplication
> and division.

They are ok, even in SeaBIOS.
  
> I'm not sure why -mdisable-fpregs option is used.  This will make integer multiplication
> slower.  All machines of interest have floating-point hardware.
We are not saving the FP regs when entering the SeaBIOS firmware. That's why I want
to avoid FP regs.

Helge