Re: [coreboot] [PATCH] libgcc regparm workaround

[Segher Boessenkool]

> programs that are compiled with non-default regparm values are
> miscompiled if they use libgcc.
> This patch works around the problem for coreboot.

Please mention the GCC bugreport # in the source near every workaround;
that way, you can one day get rid of it.  This is PR41055.
> makerule coreboot_ram.o
>    depends	"src/arch/$(CONFIG_ARCH)/lib/c_start.o $(DRIVER)  
> coreboot.a $(LIBGCC_FILE_NAME)"
> action	"$(CC) $(DISTRO_LFLAGS) -nostdlib -r -o $@ src/arch/$
>
> (CONFIG_ARCH)/lib/c_start.o $(DRIVER) -Wl,-( coreboot.a $ 
> (LIBGCC_FILE_NAME) -Wl,-)"
> action	"$(CC) $(DISTRO_LFLAGS) -nostdlib -r -o $@ src/arch/$
>
> (CONFIG_ARCH)/lib/c_start.o $(DRIVER) -Wl,--wrap,__divdi3 -Wl,-- 
> wrap,__udivdi3 -Wl,--wrap,__moddi3 -Wl,--wrap,__umoddi3 -Wl,-\ 
> ( coreboot.a $(LIBGCC_FILE_NAME) -Wl,-)"
>  end

You don't need the -( -) here, FWIW.  libgcc does not require symbols  
from
coreboot.a ;-)

Segher