Michael Ellerman 1619b69edc powerpc/boot: Fix build failure since GCC 4.9 removal ... Stephen reported that the build was broken since commit 6d2ef226f2 ("compiler_attributes.h: drop __has_attribute() support for gcc4"), with errors such as: include/linux/compiler_attributes.h:296:5: warning: "__has_attribute" is not defined, evaluates to 0 [-Wundef] 296 | #if __has_attribute(__warning__) | ^~~~~~~~~~~~~~~ make[2]: *** [arch/powerpc/boot/Makefile:225: arch/powerpc/boot/crt0.o] Error 1 But we expect __has_attribute() to always be defined now that we've stopped using GCC 4. Linus debugged it to the point of reading the GCC sources, and noticing that the problem is that __has_attribute() is not defined when preprocessing assembly files, which is what we're doing here. Our assembly files don't include, or need, compiler_attributes.h, but they are getting it unconditionally from the -include in BOOT_CFLAGS, which is then added in its entirety to BOOT_AFLAGS. That -include was added in commit 77433830ed ("powerpc: boot: include compiler_attributes.h") so that we'd have "fallthrough" and other attributes defined for the C files in arch/powerpc/boot. But it's not needed for assembly files. The minimal fix is to move the addition to BOOT_CFLAGS of -include compiler_attributes.h until after we've copied BOOT_CFLAGS into BOOT_AFLAGS. That avoids including compiler_attributes.h for asm files, but makes no other change to BOOT_CFLAGS or BOOT_AFLAGS. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Debugged-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-09-14 08:33:32 -07:00
..
boot	powerpc/boot: Fix build failure since GCC 4.9 removal	2021-09-14 08:33:32 -07:00
configs	powerpc/configs/microwatt: Enable options for systemd	2021-08-27 00:56:53 +10:00
crypto	crypto: powepc/sha1 - remove unneeded semicolon	2021-03-07 15:13:14 +11:00
include	Merge branch 'gcc-min-version-5.1' (make gcc-5.1 the minimum version)	2021-09-13 10:43:04 -07:00
kernel	compat: remove some compat entry points	2021-09-08 15:32:35 -07:00
kexec	powerpc updates for 5.15	2021-09-03 11:22:50 -07:00
kvm	ARM:	2021-09-07 13:40:51 -07:00
lib	powerpc: Only build restart_table.c for 64s	2021-07-01 22:50:54 +10:00
math-emu	powerpc/64s: avoid reloading (H)SRR registers if they are still valid	2021-06-25 00:06:55 +10:00
mm	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
net	bpf: Introduce BPF nospec instruction for mitigating Spectre v4	2021-07-29 00:20:56 +02:00
perf	powerpc/perf: Fix the check for SIAR value	2021-08-25 22:38:19 +10:00
platforms	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
purgatory	powerpc/kexec: Don't use .machine ppc64 in trampoline_64.S	2021-04-08 21:17:43 +10:00
sysdev	Merge branch 'fixes' into next	2021-09-03 22:54:12 +10:00
tools	powerpc/head_check: Fix shellcheck errors	2021-08-17 22:52:02 +10:00
xmon	powerpc: Refactor verification of MSR_RI	2021-08-26 21:21:07 +10:00
Kbuild
Kconfig	Tracing updates for 5.15:	2021-09-05 11:50:41 -07:00
Kconfig.debug	powerpc/ptdump: Convert powerpc to GENERIC_PTDUMP	2021-08-25 13:35:48 +10:00
Makefile	powerpc: Add "-z notext" flag to disable diagnostic	2021-08-15 13:49:39 +10:00
Makefile.postlink