https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86460
Bug ID: 86460
Summary: GCC 8.1 cross-compiler fails to compile linux kernel
Product: gcc
Version: 8.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: bneumeier at gmail dot com
Target Milestone: ---
I have an AMD64-to-mipsel GCC 8.1 with branch updates through 2018-06-30. When
I try to compile Linux 4.17.4 with it, the build crashes at
arch/mips/kernel/signal.c with the errors below. Similar issues occur in
kernel/syscall.c, mm/cache.c, and elsewhere.
I'm able to work around the issue by adding -Wno-error=attribute-alias.
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In file included from arch/mips/kernel/signal.c:26:
./include/linux/syscalls.h:233:18: error: 'sys_sigsuspend' alias between
functions of incompatible types 'long int(sigset_t *)' {aka 'long int(struct
<anonymous> *)'} and 'long int(long int)' [-Werror=attribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
./include/linux/syscalls.h:222:2: note: in expansion of macro
'__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
./include/linux/syscalls.h:211:36: note: in expansion of macro
'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
arch/mips/kernel/signal.c:547:1: note: in expansion of macro 'SYSCALL_DEFINE1'
SYSCALL_DEFINE1(sigsuspend, sigset_t __user *, uset)
^~~~~~~~~~~~~~~
./include/linux/syscalls.h:238:18: note: aliased declaration here
asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
^~~~~~~~
./include/linux/syscalls.h:222:2: note: in expansion of macro
'__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
./include/linux/syscalls.h:211:36: note: in expansion of macro
'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
arch/mips/kernel/signal.c:547:1: note: in expansion of macro 'SYSCALL_DEFINE1'
SYSCALL_DEFINE1(sigsuspend, sigset_t __user *, uset)
^~~~~~~~~~~~~~~
./include/linux/syscalls.h:233:18: error: 'sys_sigaction' alias between
functions of incompatible types 'long int(int, const struct sigaction *,
struct sigaction *)' and 'long int(long int, long int, long int)'
[-Werror=attribute-alias]
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
^~~
./include/linux/syscalls.h:222:2: note: in expansion of macro
'__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
./include/linux/syscalls.h:213:36: note: in expansion of macro
'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
arch/mips/kernel/signal.c:554:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
^~~~~~~~~~~~~~~
./include/linux/syscalls.h:238:18: note: aliased declaration here
asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
^~~~~~~~
./include/linux/syscalls.h:222:2: note: in expansion of macro
'__SYSCALL_DEFINEx'
__SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
^~~~~~~~~~~~~~~~~
./include/linux/syscalls.h:213:36: note: in expansion of macro
'SYSCALL_DEFINEx'
#define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
^~~~~~~~~~~~~~~
arch/mips/kernel/signal.c:554:1: note: in expansion of macro 'SYSCALL_DEFINE3'
SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
^~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
scripts/Makefile.build:312: recipe for target 'arch/mips/kernel/signal.o'
failed
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