On Fri, Jul 28, 2023, at 19:31, Nathan Chancellor wrote:
On Fri, Jul 28, 2023 at 01:00:30PM +0200, Arnd Bergmann wrote:
of the uapi version. The sanity check in the kernel-side header is intended to cross-check the CONFIG_64BIT value against the __BITS_PER_LONG constant from the header.
My first guess would be that this only worked by accident if the headers defaulted to "#define __BITS_PER_LONG 32" in and #undef CONFIG_64BIT" when include/generated/autoconf.h, but now the __BITS_PER_LONG value is actually correct.
That seems like a reasonable theory. I am still busy looking into other things today but I can try to double back to this on Monday if you don't make any progress.
I tried reproducing this today on arm64 Debian with linux-6.5-rc3 and clang-14.0.6 but I don't see the problem here. With 'make V=1' I see command for building scripts/sorttable is
clang -Wp,-MMD,scripts/.sorttable.d -Wall -Wmissing-prototypes \ -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu11 \ -I./tools/include -I./tools/arch/x86/include -DUNWINDER_ORC_ENABLED \ -o scripts/sorttable scripts/sorttable.c -lpthread
which does create an arm64 executable but includes the x86 headers, which is clearly a bug by itself, it just doesn't trigger the problem for me.
I also noticed that your command line includes CROSS_COMPILE=x86_64-linux- rather than CROSS_COMPILE=x86_64-linux-gnu-, and I think we've had problems with that in the past, when "clang --target=x86_64-linux" fails to find the glibc system headers.
Arnd