系统：Fedora29. 安装rtai-5.2。错误提示如下：
In file included from ./include/linux/kernel.h:10,
from arch/x86/entry/common.c:10:
arch/x86/entry/common.c: In function ‘syscall_return_slowpath’:
arch/x86/entry/common.c:294:5: error: implicit declaration of function ‘ipipe_root_nr_syscalls’; did you mean ‘ipipe_handle_syscall’? [-Werror=implicit-function-declaration]
ipipe_root_nr_syscalls(ti)) &&
^~~~~~~~~~~~~~~~~~~~~~
./include/linux/compiler.h:77:42: note: in definition of macro ‘unlikely’
# define unlikely(x) __builtin_expect(!!(x), 0)
^
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:327: arch/x86/entry/common.o] Error 1
make[1]: *** [scripts/Makefile.build:585: arch/x86/entry] Error 2
make: *** [Makefile:1039: arch/x86] Error 2
make: *** Waiting for unfinished jobs....
根据网上有的提示，说在内核配置里将ipipeline设置成enable，但是在内核配置菜单界面里没有找到ipipeline选项，搜索了只有信息，没有设置项。在kernel/ipipe/Kconfig代码里将default设置成了y，还是一样没有解决。Kconfig部分代码如下：
config IPIPE
bool "Interrupt pipeline"
depends on HAVE_IPIPE_SUPPORT
default y
---help---
Activate this option if you want the interrupt pipeline to be
compiled in.
请问这个错误该如何解决？谢谢。（如需更多信息请留言）
