Ubantu12.0.4下编译2.6.18内核的错误

最新推荐文章于 2022-04-07 14:11:46 发布

原创最新推荐文章于 2022-04-07 14:11:46 发布 · 2.4k 阅读

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#linux #解决方案 #内核

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本文解决Linux内核编译过程中遇到的未声明标识符、变量设置但未使用及未定义引用等问题，通过添加头文件、修改配置宏及代码结构调整来修复编译错误。

1、

error: ‘PATH_MAX’ undeclared (first use in this function)

scripts/mod/sumversion.c: In function ‘get_src_version’:
scripts/mod/sumversion.c:384:16: error: ‘PATH_MAX’ undeclared (first use in this function)
scripts/mod/sumversion.c:384:16: note: each undeclared identifier is reported only once for each function it appears in
scripts/mod/sumversion.c:384:7: warning: unused variable ‘filelist’ [-Wunused-variable]
make[2]: *** [scripts/mod/sumversion.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2

解决方法：# vi scripts/mod/sumversion.c头文件包含中查看是否有limits.h，若没有，包含进去即可，，#inlcude <limits.h>

2、

drivers/video/neofb.c: In function ‘neo_init_hw’:
drivers/video/neofb.c:1925:6: warning: variable ‘maxHeight’ set but not used [-Wunused-but-set-variable]
drivers/video/neofb.c:1924:6: warning: variable ‘maxWidth’ set but not used [-Wunused-but-set-variable]
drivers/video/neofb.c:1923:6: warning: variable ‘linearSize’ set but not used [-Wunused-but-set-variable]
drivers/video/neofb.c:1921:6: warning: variable ‘CursorMem’ set but not used [-Wunused-but-set-variable]
  CC [M]  drivers/video/tdfxfb.o
drivers/video/tdfxfb.c: In function ‘att_outb’:
drivers/video/tdfxfb.c:240:16: warning: variable ‘tmp’ set but not used [-Wunused-but-set-variable]
  CC [M]  drivers/video/tridentfb.o
drivers/video/tridentfb.c: In function ‘set_vclk’:
drivers/video/tridentfb.c:616:6: warning: variable ‘f’ set but not used [-Wunused-but-set-variable]
drivers/video/tridentfb.c: In function ‘tridentfb_set_par’:
drivers/video/tridentfb.c:788:51: warning: variable ‘vblankend’ set but not used [-Wunused-but-set-variable]
  CC [M]  drivers/video/hgafb.o
  CC [M]  drivers/video/sstfb.o
drivers/video/sstfb.c:150:6: error: #elif with no expression
drivers/video/sstfb.c: In function ‘sst_detect_ics’:
drivers/video/sstfb.c:990:26: warning: variable ‘n_clk1_b’ set but not used [-Wunused-but-set-variable]
drivers/video/sstfb.c:990:16: warning: variable ‘n_clk0_7’ set but not used [-Wunused-but-set-variable]
drivers/video/sstfb.c:990:6: warning: variable ‘n_clk0_1’ set but not used [-Wunused-but-set-variable]
make[2]: *** [drivers/video/sstfb.o] Error 1
make[1]: *** [drivers/video] Error 2
make: *** [drivers] Error 2

解决方法：定位到

drivers/video/sstfb.c:150:6: error: #elif with no expression

将elif 改为else

3、mutex.c:(.sched.text+0x1aca): undefined reference to `__mutex_lock_slowpath'

kernel/built-in.o: In function `.text.lock.mutex':
mutex.c:(.sched.text+0x1aca): undefined reference to `__mutex_lock_slowpath'
mutex.c:(.sched.text+0x1ad4): undefined reference to `__mutex_unlock_slowpath'
make: *** [.tmp_vmlinux1] Error 1

/* 
* In the DEBUG case we are using the "NULL fastpath" for mutexes, 
* which forces all calls into the slowpath: 
*/  
#ifdef CONFIG_DEBUG_MUTEXES  
＃ include "mutex-debug.h"  
# include <asm-generic/mutex-null.h>  
#else  
# include "mutex.h"  
# include <asm/mutex.h>  
#endif

解释：CONFIG_DEBUG_MUTEXES控制了头文件的包含关系，搜索配置文件 .config 可以看到CONFIG_DEBUG_MUTEXES并没有定义。

解决方案：将 .config 文件中的 CONFIG_DEBUG_MUTEXES 宏值必为 y 即可。（位于2747行。或者用命令『vim』查找 /CONFIG_DEBUG_MUTEXES
）