编译 内核 2.6.0 出错问题

[赖伟峰]

我的环境 ： Visual-box 5.2，Ubuntu  14.04，gcc 4.8.2

在 make menuconfig 时用了默认配置，选择 Save Configuration to an Alternate File  后 EXIT，进行下一步 make/make bzImage 时有如下报错：

/*******************************************************

  CHK     include/linux/version.h

  UPD     include/linux/version.h

  SYMLINK include/asm -> include/asm-x86_64

  HOSTCC  scripts/split-include

scripts/split-include.c: In function ‘main’:

scripts/split-include.c:133:11: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]

      fgets(old_line, buffer_size, fp_target);

           ^

  HOSTCC  scripts/conmakehash

  HOSTCC  scripts/docproc

  HOSTCC  scripts/kallsyms

scripts/kallsyms.c: In function ‘read_symbol’:

scripts/kallsyms.c:43:9: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result]

    fgets(str, 500, in);

         ^

  CC      scripts/empty.o

  HOSTCC  scripts/mk_elfconfig

  MKELF   scripts/elfconfig.h

  HOSTCC  scripts/file2alias.o

  HOSTCC  scripts/modpost.o

  HOSTLD  scripts/modpost

  HOSTCC  scripts/pnmtologo

  HOSTCC  scripts/bin2c

  SPLIT   include/linux/autoconf.h -> include/config/*

  CC      arch/x86_64/kernel/asm-offsets.s

In file included from include/linux/spinlock.h:16:0,

                 from include/linux/capability.h:45,

                 from include/linux/sched.h:7,

                 from arch/x86_64/kernel/asm-offsets.c:7:

include/asm/processor.h:80:26: error: array type has incomplete element type

 extern struct tss_struct init_tss[NR_CPUS];

                          ^

In file included from include/asm/smp.h:18:0,

                 from include/linux/smp.h:17,

                 from include/linux/sched.h:23,

                 from arch/x86_64/kernel/asm-offsets.c:7:

include/asm/mpspec.h:79:2: warning: ‘packed’ attribute ignored for field of type ‘unsigned char[6]’ [-Wattributes]

  unsigned char mpc_bustype[6] __attribute((packed));

  ^

In file included from include/asm/processor.h:19:0,

                 from include/linux/spinlock.h:16,

                 from include/linux/capability.h:45,

                 from include/linux/sched.h:7,

                 from arch/x86_64/kernel/asm-offsets.c:7:

include/asm/apic.h: In function ‘apic_write_atomic’:

include/asm/system.h:185:22: warning: value computed is not used [-Wunused-value]

 #define xchg(ptr,v) ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr))))

                      ^

include/asm/apic.h:33:2: note: in expansion of macro ‘xchg’

  xchg((volatile unsigned int *)(APIC_BASE+reg), v);

  ^

make[1]: *** [arch/x86_64/kernel/asm-offsets.s] 错误 1

make: *** [arch/x86_64/kernel/asm-offsets.s] 错误 2

*******************************************************/

请问该怎么解决呢？

[孙郭程港]

include/asm/processor.h:80:26: error: array type has incomplete element type

字面意思去理解就是，数组元素的类型不完全。

写Makefile时报了这个错误，发现原来在主函数中包含某个头文件，这个头文件引用了其它文件的一个结构体，而这个结构体还没有声明！（原答案地址：https://blog.csdn.net/suer0101/article/details/7616960）

建议看下 processor.h 文件

本人不才，如回答有误还望谅解。

在 2018年3月1日星期四 UTC+8下午8:42:26，赖伟峰写道：