* Masahiro Yamada <masahi...@kernel.org>: > Hi Helge, > > On Sat, May 9, 2020 at 6:46 AM Helge Deller <del...@gmx.de> wrote: > > > > * Masahiro Yamada <masahi...@kernel.org>: > > > On Sat, Apr 25, 2020 at 2:47 PM Masahiro Yamada <masahi...@kernel.org> > > > 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. > > > > That patch breaks then building the boot loader/compressor: > > ... > > hppa-linux-gnu-ld -X -e startup --as-needed -T > > arch/parisc/boot/compressed/vmlinux.lds arch/parisc/boot/compressed/head.o > > arch/parisc/boot/compressed/real2.o arch/parisc/boot/compressed/firmware.o > > arch/parisc/boot/compressed/misc.o arch/parisc/boot/compressed/piggy.o -o > > arch/parisc/boot/compressed/vmlinux > > hppa-linux-gnu-ld: arch/parisc/boot/compressed/misc.o: in function > > `dec_vli': > > (.text+0x104): undefined reference to `__ashldi3' > > hppa-linux-gnu-ld: arch/parisc/boot/compressed/misc.o: in function > > `lzma_len': > > (.text+0x2b0): undefined reference to `$$mulI' > > hppa-linux-gnu-ld: (.text+0x344): undefined reference to `$$mulI' > > hppa-linux-gnu-ld: (.text+0x3f8): undefined reference to `$$mulI' > > > > > > The patch below works, but I wonder if it's possible to avoid > > to examine LIBGCC twice....? > > > > Helge > > > Sorry for the breakage. > > How about moving LIBGCC below ?
Good idea. The patch below does work for me. We do not need $KBUILD_CFLAGS to get the libgcc.a filename, so we do not need to pipe the output to /dev/null either. Can you try if that works, and if yes, can you apply it? Helge diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile index 628cd8bb7ad8..fadbbd010337 100644 --- a/arch/parisc/Makefile +++ b/arch/parisc/Makefile @@ -21,8 +21,6 @@ KBUILD_IMAGE := vmlinuz NM = sh $(srctree)/arch/parisc/nm CHECKFLAGS += -D__hppa__=1 -LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) -export LIBGCC ifdef CONFIG_64BIT UTS_MACHINE := parisc64 @@ -110,6 +108,8 @@ cflags-$(CONFIG_PA8X00) += -march=2.0 -mschedule=8000 head-y := arch/parisc/kernel/head.o KBUILD_CFLAGS += $(cflags-y) +LIBGCC := $(shell $(CC) -print-libgcc-file-name) +export LIBGCC kernel-y := mm/ kernel/ math-emu/
