# x86cncbuild

**Repository Path**: john-ppx/x86cncbuild

## Basic Information

- **Project Name**: x86cncbuild
- **Description**: The scripe is auto build linux kernal+xenomai for linuxcnc
- **Primary Language**: Shell
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-11-16
- **Last Updated**: 2023-09-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# x86cncbuild

The scripe is auto build linux kernal+xenomai for linuxcnc

- install all nessary software
- build linux kernel
- build xenomai
- build linuxcnc

实验过的版本(不带RTnet)
xenomai 3.0.8
ipipe 4.4.43-x86-8
kernel 4.4.43

实验过的版本(不带RTnet)
xenomai 3.0.8
ipipe 4.14.128-x86-5
kernel 4.14.128
在ubuntu20.04上编译4.14.128内核，需要降级gcc8之后才能编译通过

sudo apt-get install dwarves zstd
xenomai 3.2.1
linux-dovetail-v5.10.95-dovetail1
在ubuntu20.04上编译5.10.95内核，需要降级gcc8之后才能编译通过



Recommended options:

* General setup
  --> Local version - append to kernel release: -xenomai-3.0.5
    --> Timers subsystem
          --> High Resolution Timer Support (Enable)
    * Xenomai/cobalt
      --> Sizes and static limits
          --> Number of registry slots (512 --> 4096)
        --> Size of system heap (Kb) (512 --> 4096)
        --> Size of private heap (Kb) (64 --> 256)
        --> Size of shared heap (Kb) (64 --> 256)
        --> Maximum number of POSIX timers per process (128 --> 512)
      --> Drivers
          --> RTnet
                  --> RTnet, TCP/IP socket interface (Enable)
                --> Drivers
                                --> New intel(R) PRO/1000 PCIe (Enable)
                    --> Realtek 8169 (Enable)
                    --> Loopback (Enable)
            --> Add-Ons
                        --> Real-Time Capturing Support (Enable)
    * Power management and ACPI options
      --> CPU Frequency scaling
            --> CPU Frequency scaling (Disable)
      --> ACPI (Advanced Configuration and Power Interface) Support
            --> Processor (Disable)
      --> CPU Idle
            --> CPU idle PM support (Disable)
    * Pocessor type and features
      --> Enable maximum number of SMP processors and NUMA nodes (Disable)
      // Ref : http://xenomai.org/pipermail/xenomai/2017-September/037718.html
      --> Processor family
            --> Core 2/newer Xeon (if "cat /proc/cpuinfo | grep family" returns 6, set as Generic otherwise)
              // Xenomai will issue a warning about CONFIG_MIGRATION, disable those in this order
              --> Transparent Hugepage Support (Disable)
      --> Allow for memory compaction (Disable)
      --> Contiguous Memory Allocation (Disable)
      --> Allow for memory compaction
          --> Page Migration (Disable)
    * Device Drivers
      --> Staging drivers
            --> Unisys SPAR driver support
                     --> Unisys visorbus driver (Disable)

# 错误及解决办法汇总

## 编译出现错误arch_mangle_irq_bits时，修改如下配置即可

* Device Drivers
	--> Microsoft Hyper-V guest support
		--> Microsoft Hyper-V client drivers (Disable)

## 编译出现错误 error: ‘uv_bau_message_interrupt’ undeclared

在文件arch/x86/kernel/ipipe.c中添加extern void uv_bau_message_interrupt(struct pt_regs *regs);

## Linux内核编译错误：make[1]: *** 没有规则可制作目标“debian/canonical-certs.pem”，由“certs/x509_certificate_list” 需求。 停止

拷贝 cp -v /boot/config-$(uname -r) .config 在系统内核配置基础上修改

## 编译内核报错BTF：.tmp_vmlinux.btf:pahole (pahole) is not available

缺少软件包，安装dwarves   sudo apt-get install dwarves

#"FAILED unresolved symbol udp_sock" 

禁止CONFIG_DEBUG_INFO_BTF    sudo scripts/config --disable CONFIG_DEBUG_INFO_BTF

## 内核模块编译不通过,报错没有规则生成xxx.o

make[1]: 进入目录“/usr/src/linux-headers-5.10.95-xenomai-3.2.1”
make[2]: *** 没有规则可制作目标“/home/syshil/work/tmp/hello.o”，由“/home/syshil/work/tmp/hello.mod” 需求。 停止。
make[1]: *** [Makefile:1822：/home/syshil/work/tmp] 错误 2
make[1]: 离开目录“/usr/src/linux-headers-5.10.95-xenomai-3.2.1”
make: *** [Makefile:10：all] 错误 2
增加配置项 make CONFIG_STACK_VALIDATION=
或者
安装 sudo apt-get install libelf-dev之后，重新编译内核安装（未实验是否正确）
或者
/usr/src/linux-headers-4.14.128-xenomai-3.0.8/tools/objtool/目录下没有东西,把原始编译的kenrnel目录下的这个目录拷贝进去即可

## 5.9以后内核模块使用不了sched_setscheduler

5.9以后内涵删除了一些内核函数的导出，因此内核模块不能使用这些调用了
 删除了原有的sched_setschedule（） / sched_setattr（） 接口,增加了
sched_set_fifo（p）
sched_set_fifo_low（p）
sched_set_normal（p， nice）

其中调用sched_set_fifo（）会将指定进程放到SCHED_FIFO类中，其优先级为50——这只是min和max之间的一半位置。
对于需求不那么迫切的线程，sched_set_fifo_low（）将优先级设置为最低值（1）。
而调用sched_set_normal（）会将线程返回给定好的值SCHED_NORMAL类。

参考https://www.virtualbox.org/ticket/19845
参考https://www.elecfans.com/d/1227560.html

# Ubuntu20.04下，Xenomai3.2.1+Linux5.10.76安装

https://blog.csdn.net/weixin_44445507/article/details/121995239