https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63837
Bug ID: 63837
Summary: [5 Regression] r217391 causes kernel build errors with
GCC_COMPARE_DEBUG=1
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: manu at gcc dot gnu.org
For example:
trippels@gcc2-power8 linux-3.17.2 % GCC_COMPARE_DEBUG=1 make
CC="/home/trippels/gcc_bisect/usr/local/bin/gcc -Werror -std=gnu89"
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
HOSTCC scripts/basic/fixdep
HOSTCC scripts/basic/bin2c
CC kernel/bounds.s
GEN include/generated/bounds.h
CC arch/powerpc/kernel/asm-offsets.s
In file included from include/linux/kobject.h:21:0,
from include/linux/device.h:17,
from include/linux/node.h:17,
from include/linux/swap.h:10,
from include/linux/suspend.h:4,
from arch/powerpc/kernel/asm-offsets.c:24:
include/linux/sysfs.h: In function ‘sysfs_get_dirent’:
include/linux/sysfs.h:457:37: error: pointer targets in passing argument 2 of
‘kernfs_find_and_get’ differ in signedness [-Werror=pointer-sign]
return kernfs_find_and_get(parent, name);
^
In file included from include/linux/cgroup.h:23:0,
from include/linux/memcontrol.h:22,
from include/linux/swap.h:8,
from include/linux/suspend.h:4,
from arch/powerpc/kernel/asm-offsets.c:24:
include/linux/kernfs.h:411:1: note: expected ‘const char *’ but argument is of
type ‘const unsigned char *’
kernfs_find_and_get(struct kernfs_node *kn, const char *name)
^
cc1: all warnings being treated as errors
make[1]: *** [arch/powerpc/kernel/asm-offsets.s] Error 1
make: *** [prepare0] Error 2
Without GCC_COMPARE_DEBUG=1 the kernel builds fine.
Started with r217391.
