Build linux kernel

Get a copy of source code

Take a copy of the linux kernel source repository via git software

git clone --depth=1 https://github.com/torvalds/linux

or download a zip file from this link - https://github.com/torvalds/linux/archive/refs/heads/master.zip

Generate .config file

make menuconfig

menuconfig options

Here are the images of the some menuconfig options chosen.

menuconfig

Options

kernel .config support

Module unloading

Kernel Function Tracer

Run make help to get the hints and options for building.

build a image

After that do, make bzImage.

/workspace/linux (master) $ make bzImage

  SYSHDR  arch/x86/include/generated/uapi/asm/unistd_32.h
...
  GZIP    arch/x86/boot/compressed/vmlinux.bin.gz
  HOSTCC  arch/x86/boot/compressed/mkpiggy
  MKPIGGY arch/x86/boot/compressed/piggy.S
  AS      arch/x86/boot/compressed/piggy.o
  CC      arch/x86/boot/compressed/cpuflags.o
  CC      arch/x86/boot/compressed/early_serial_console.o
  CC      arch/x86/boot/compressed/kaslr.o
  CC      arch/x86/boot/compressed/ident_map_64.o
  CC      arch/x86/boot/compressed/idt_64.o
  AS      arch/x86/boot/compressed/idt_handlers_64.o
  AS      arch/x86/boot/compressed/mem_encrypt.o
  CC      arch/x86/boot/compressed/pgtable_64.o
  CC      arch/x86/boot/compressed/acpi.o
  AS      arch/x86/boot/compressed/efi_thunk_64.o
  LD      arch/x86/boot/compressed/vmlinux
  ZOFFSET arch/x86/boot/zoffset.h
  AS      arch/x86/boot/header.o
  CC      arch/x86/boot/main.o
  CC      arch/x86/boot/memory.o
  CC      arch/x86/boot/pm.o
  AS      arch/x86/boot/pmjump.o
  CC      arch/x86/boot/printf.o
  CC      arch/x86/boot/regs.o
  CC      arch/x86/boot/string.o
  CC      arch/x86/boot/tty.o
  CC      arch/x86/boot/video.o
  CC      arch/x86/boot/video-mode.o
  CC      arch/x86/boot/version.o
  CC      arch/x86/boot/video-vga.o
  CC      arch/x86/boot/video-vesa.o
  CC      arch/x86/boot/video-bios.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  OBJCOPY arch/x86/boot/vmlinux.bin
  HOSTCC  arch/x86/boot/tools/build
  BUILD   arch/x86/boot/bzImage
Kernel: arch/x86/boot/bzImage is ready  (#1)
/workspace/linux (master) $ 

Note Kernel: arch/x86/boot/bzImage is ready (#1).

Errors

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

/workspace/linux (master) $ make
  SYSHDR  arch/x86/include/generated/uapi/asm/unistd_32.h
...
  DESCEND objtool
<stdin>:1:10: fatal error: libelf.h: No such file or directory
compilation terminated.
  HOSTCC  /workspace/linux/tools/objtool/fixdep.o
...
  AR      /workspace/linux/tools/objtool/libsubcmd.a
  CC      /workspace/linux/tools/objtool/arch/x86/special.o
In file included from /workspace/linux/tools/objtool/include/objtool/objtool.h:13,
                 from /workspace/linux/tools/objtool/include/objtool/arch.h:11,
                 from /workspace/linux/tools/objtool/include/objtool/check.h:11,
                 from /workspace/linux/tools/objtool/include/objtool/special.h:10,
                 from arch/x86/special.c:4:
/workspace/linux/tools/objtool/include/objtool/elf.h:10:10: fatal error: gelf.h: No such file or directory
   10 | #include <gelf.h>
      |          ^~~~~~~~
compilation terminated.
make[4]: *** [/workspace/linux/tools/build/Makefile.build:97: /workspace/linux/tools/objtool/arch/x86/special.o] Error 1
make[3]: *** [/workspace/linux/tools/build/Makefile.build:139: arch/x86] Error 2
make[2]: *** [Makefile:56: /workspace/linux/tools/objtool/objtool-in.o] Error 2
make[1]: *** [Makefile:69: objtool] Error 2
make: *** [Makefile:1337: tools/objtool] Error 2

Install libelf-dev package

/workspace/linux (master) $ make bzImage
  SYNC    include/config/auto.conf.cmd
  LEX     scripts/kconfig/lexer.lex.c
  YACC    scripts/kconfig/parser.tab.[ch]
  HOSTCC  scripts/kconfig/lexer.lex.o
  HOSTCC  scripts/kconfig/menu.o
  HOSTCC  scripts/kconfig/parser.tab.o
  HOSTCC  scripts/kconfig/preprocess.o
  HOSTCC  scripts/kconfig/symbol.o
  HOSTCC  scripts/kconfig/util.o
  HOSTLD  scripts/kconfig/conf
*
* Restart config...
*
*
* Control Group support
*
Control Group support (CGROUPS) [Y/n/?] y
  Favor dynamic modification latency reduction by default (CGROUP_FAVOR_DYNMODS) [N/y/?] (NEW) y

aa

/workspace/linux (master) $ make bzImage
  SYNC    include/config/auto.conf.cmd
  LEX     scripts/kconfig/lexer.lex.c
  YACC    scripts/kconfig/parser.tab.[ch]
  HOSTCC  scripts/kconfig/lexer.lex.o
  HOSTCC  scripts/kconfig/menu.o
  HOSTCC  scripts/kconfig/parser.tab.o
  HOSTCC  scripts/kconfig/preprocess.o
  HOSTCC  scripts/kconfig/symbol.o
  HOSTCC  scripts/kconfig/util.o
  HOSTLD  scripts/kconfig/conf
*
* Restart config...
*
*
* Control Group support
*
Control Group support (CGROUPS) [Y/n/?] y
  Favor dynamic modification latency reduction by default (CGROUP_FAVOR_DYNMODS) [N/y/?] (NEW) y

Video