On Sat, Apr 25, 2020 at 2:47 PM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote: > > 'make ARCH=parisc clean' emits a tons of error messages as follows: > > $ make ARCH=parisc clean > gcc: error: unrecognized command line option '-mno-space-regs' > gcc: error: unrecognized command line option '-mfast-indirect-calls'; did you mean '-mforce-indirect-call'? > gcc: error: unrecognized command line option '-mdisable-fpregs' > gcc: error: missing argument to '-Wframe-larger-than=' > gcc: error: unrecognized command line option '-mno-space-regs' > gcc: error: unrecognized command line option '-mfast-indirect-calls'; did you mean '-mforce-indirect-call'? > gcc: error: unrecognized command line option '-mdisable-fpregs' > gcc: error: missing argument to '-Wframe-larger-than=' > ... > > You can supporess them except '-Wframe-larger-than' by setting correct > CROSS_COMPILE=, but we should not require any compiler for cleaning. > > This $(shell ...) is evaluated so many times because LIBGCC is exported. > Use the ':=' operator to evaluate it just once, and sink the stderr. > Applied to linux-kbuild. > Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx> > --- > > arch/parisc/Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile > index 628cd8bb7ad8..d82787da43cd 100644 > --- a/arch/parisc/Makefile > +++ b/arch/parisc/Makefile > @@ -21,7 +21,7 @@ KBUILD_IMAGE := vmlinuz > > NM = sh $(srctree)/arch/parisc/nm > CHECKFLAGS += -D__hppa__=1 > -LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) > +LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name 2>/dev/null) > export LIBGCC > > ifdef CONFIG_64BIT > -- > 2.25.1 > -- Best Regards Masahiro Yamada
