Compile kernel error: Can't use'defined(@array)' (Maybe you should just omit the defined()?) at kernel/timeconst.pl

Recently, when compiling a new rk sdk, an error was reported when compiling the kernel

  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[1]: 'include/generated/mach-types.h' is up to date.
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  TIMEC   kernel/timeconst.h
Can't use 'defined(@array)' (Maybe you should just omit the defined()?) at kernel/timeconst.pl line 373.
/home/liuxueneng/workCode/rk3066/kernel/kernel/Makefile:141: recipe for target 'kernel/timeconst.h' failed
make[1]: *** [kernel/timeconst.h] Error 255
Makefile:973: recipe for target 'kernel' failed
make: *** [kernel] Error 2

Display error

Can’t use ‘defined(@array)’ (Maybe you should just omit the defined()?) at kernel/timeconst.pl line 373
has prompted where is the delicate error message, open timeconst.pl to see (under the kerner directory)

372        @val = @{$canned_values{$hz}};                                        
 373         if (!defined(@val)) {                                                          
 374                 @val = compute_values($hz);                                   
 375         }                                                                     
 376         output($hz, @val);

Change to the following to compile

 372        @val = @{$canned_values{$hz}};                                        
 373         if (!@val) {                                                          
 374                 @val = compute_values($hz);                                   
 375         }                                                                     
 376         output($hz, @val);

https://www.cnblogs.com/tid-think/p/10929435.html
I checked the updates and found that one of them was that the Perl version was upgraded to v5.22.1. Then I checked the official Perl documentation and found that the official website has a bug, and the version has defined (@array) removed. Up. You can directly use the array to determine non-empty.

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