unable to build kernel

[Sumit Kumar]

Hi,

I am unable to build kernel. Can anyone please help ?

I am following steps from here: 
https://kernelnewbies.org/OutreachyfirstpatchSetup

sumitsum at sumit-personal:~/Documents/linux_kernel/git/kernels/staging$ 
make -j3
   YACC    scripts/kconfig/zconf.tab.c
/bin/sh: 1: bison: not found
scripts/Makefile.lib:210: recipe for target 
'scripts/kconfig/zconf.tab.c' failed
make[2]: *** [scripts/kconfig/zconf.tab.c] Error 127
make[2]: *** Waiting for unfinished jobs....
   LEX     scripts/kconfig/zconf.lex.c
/bin/sh: 1: flex: not found
scripts/Makefile.lib:195: recipe for target 
'scripts/kconfig/zconf.lex.c' failed
make[2]: *** [scripts/kconfig/zconf.lex.c] Error 127
Makefile:525: recipe for target 'syncconfig' failed
make[1]: *** [syncconfig] Error 2
make: *** No rule to make target 'include/config/auto.conf', needed by 
'include/config/kernel.release'.  Stop.
make: *** Waiting for unfinished jobs....

--

Thanks and Regards,

Sumit

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