fatal error: libelf.h: No such file or directory

  HDRINST usr/include/asm/bpf_perf_event.h

  HDRINST usr/include/asm/sockios.h

  HDRINST usr/include/asm/termbits.h

  HDRINST usr/include/asm/socket.h

  HDRINST usr/include/asm/unistd_64.h

  DESCEND objtool

<stdin>:1:10: fatal error: libelf.h: No such file or directory

compilation terminated.

  HOSTCC  /home/austin/src/0523_kernel_src/out-w1_security_x86/tools/objtool/fixdep.o

  HOSTLD  /home/austin/src/0523_kernel_src/out-w1_security_x86/tools/objtool/fixdep-in.o

  LINK    /home/austin/src/0523_kernel_src/out-w1_security_x86/tools/objtool/fixdep

  

$ sudo apt-get install libelf-dev

Reading package lists... Done

Building dependency tree       

Reading state information... Done

The following NEW packages will be installed:

  libelf-dev

0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.

Need to get 57.0 kB of archives.

After this operation, 382 kB of additional disk space will be used.

Get:1 http://archive.ubuntu.com/ubuntu focal/main amd64 libelf-dev amd64 0.176-1.1build1 [57.0 kB]

Fetched 57.0 kB in 1s (55.0 kB/s)     

debconf: delaying package configuration, since apt-utils is not installed

Selecting previously unselected package libelf-dev:amd64.

(Reading database ... 146236 files and directories currently installed.)

Preparing to unpack .../libelf-dev_0.176-1.1build1_amd64.deb ...

Unpacking libelf-dev:amd64 (0.176-1.1build1) ...

Setting up libelf-dev:amd64 (0.176-1.1build1) ...