On Wednesday, October 19, 2016 4:50:26 PM CEST Michal Marek wrote: > Dne 15.10.2016 v 14:43 Nicholas Piggin napsal(a): > > +# .S file exports must have their C prototypes defined in asm/asm-prototypes.h > > +# or a file that it includes, in order to get versioned symbols. We build a > > +# dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from > > +# the .S file (with trailing ';'), and run genksyms on that, to extract vers. > > +# > > +# These mirror gensymtypes_c and co above, keep them in synch. > > +cmd_gensymtypes_S = \ > > + (echo "\#include <linux/kernel.h>" ; \ > > + echo "\#include <asm/asm-prototypes.h>" ; \ > > + grep EXPORT_SYMBOL $< | sed 's/$$/;/' ) | \ > > + $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ > > + $(GENKSYMS) $(if $(1), -T $(2)) \ > > + $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ > > + $(if $(KBUILD_PRESERVE),-p) \ > > + -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) > > I think it would be cleaner to add the #include to the .S files > themselves and grep for both EXPORT_SYMBOL and #include here. The reason > is that some files might need additional #includes to allow genksyms to > properly expand some function prototypes. > This is something I tried earlier, and it wasn't pretty: Some of the assembler files rely on -D__ASSEMBLER__ to be set in order to read the right headers, but setting that macro means that all of the declarations get skipped. I ended up testing for -D__GENKSYMS__ in each .S file, which was also rather ugly. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
