On Fri, Nov 02, 2018 at 10:38:36AM -0700, Nick Desaulniers wrote: > On Fri, Nov 2, 2018 at 10:34 AM Segher Boessenkool > <seg...@kernel.crashing.org> wrote: > > > > On Fri, Nov 02, 2018 at 02:07:13PM +1030, Joel Stanley wrote: > > > arch/powerpc/math-emu/fnmsub.c:46:2: error: invalid use of a cast in a > > > inline asm context requiring an l-value: remove the cast or build with > > > -fheinous-gnu-extensions > > > > (It is spelled lvalue). > > > > *All* of extended asm is a GNU extension, what is clang trying to say here? > > Confused :-) > > Isn't the result of a cast a temporary value? Probably just need to > move the case out of the inline asm block to a separate statement. > Having the full backtrace should help.
The kernel's sfp-machine.h has casts in lvalues, inside macros. All such casts seem to be casts to compatible types (and if not, it probably won't work with GCC either). Segher
