On Wed, Mar 15, 2023 at 02:40:59PM -0700, Nick Desaulniers wrote: > This is _not_ an upstream commit and just for 5.15.y only. It is based > on upstream > commit 32ef9e5054ec ("Makefile.debug: re-enable debug info for .S files"). > > When the user has chosen not to use their compiler's implicit default > DWARF version (which changes over time) via selecting > - CONFIG_DEBUG_INFO_DWARF4 or > - CONFIG_DEBUG_INFO_DWARF5 > we need to tell the compiler this for Asm sources as well as C sources. > (We use the compiler to drive assembler jobs in kbuild, since most asm > needs to be preprocessed first). Otherwise, we will get object files > built from Asm sources with the compiler's implicit default DWARF > version. > > For example, selecting CONFIG_DEBUG_INFO_DWARF4 would produce a DWARFv5 > vmlinux, since it was a mix of DWARFv4 object files from C sources and > DWARFv5 object files from Asm sources when using Clang as the assembler > (ex. `make LLVM=1`). > > Fixes: 0ee2f0567a56 ("Makefile.debug: re-enable debug info for .S files") > Reported-by: Lecopzer Chen <lecopzer.chen@xxxxxxxxxxxx> > Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > --- > Makefile | 1 + > 1 file changed, 1 insertion(+) Now queued up, thanks, greg k-h