On Wed, Jan 2, 2019 at 9:14 PM Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > > Hi, > > I was not aware that CONFIG_JUMP_LABEL Kconfig setting depends on the > support of asm-goto. > > Currently, I am doing experiments with clang-7 and a snapshot of > clang-8 on Linux/x86. > These compilers have no asm-goto support. > > What is your recommendation for Linux >= v4.20? > I am asking as it is possible to set CONFIG_JUMP_LABEL=y when > compiling with clang - which has no effect. > This is confusing. > > Thanks, this patch makes things clearer and protects users from > setting "wrong" in the sense of non-functional settings. > > I have tested this against recent Linus tree where kbuild/kconfig Git > pulls were latest commits. > > Tested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx> [ x86 with LLVM/Clang > v7 and v8 (snapshot) ] Which part was tested? x86 kernel cannot be compiled with Clang since it lacks the asm-goto support. $ make CC=clang Compiler lacks asm-goto support. arch/x86/Makefile:293: recipe for target 'checkbin' failed make: *** [checkbin] Error 1 -- Best Regards Masahiro Yamada
