Kbuild

   1 # SPDX-License-Identifier: GPL-2.0
   2 #
   3 # Kbuild for top-level directory of the kernel
   4
   5 #####
   6 # Generate bounds.h
   7
   8 bounds-file := include/generated/bounds.h
   9
  10 always  := $(bounds-file)
  11 targets := kernel/bounds.s
  12
  13 $(bounds-file): kernel/bounds.s FORCE
  14         $(call filechk,offsets,__LINUX_BOUNDS_H__)
  15
  16 #####
  17 # Generate timeconst.h
  18
  19 timeconst-file := include/generated/timeconst.h
  20
  21 targets += $(timeconst-file)
  22
  23 filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
  24
  25 $(timeconst-file): kernel/time/timeconst.bc FORCE
  26         $(call filechk,gentimeconst)
  27
  28 #####
  29 # Generate asm-offsets.h
  30
  31 offsets-file := include/generated/asm-offsets.h
  32
  33 always  += $(offsets-file)
  34 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
  35
  36 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
  37
  38 $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
  39         $(call filechk,offsets,__ASM_OFFSETS_H__)
  40
  41 #####
  42 # Check for missing system calls
  43
  44 always += missing-syscalls
  45 targets += missing-syscalls
  46
  47 quiet_cmd_syscalls = CALL    $<
  48       cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
  49
  50 missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
  51         $(call cmd,syscalls)
  52
  53 #####
  54 # Check atomic headers are up-to-date
  55
  56 always += old-atomics
  57 targets += old-atomics
  58
  59 quiet_cmd_atomics = CALL    $<
  60       cmd_atomics = $(CONFIG_SHELL) $<
  61
  62 old-atomics: scripts/atomic/check-atomics.sh FORCE
  63         $(call cmd,atomics)
  64
  65 # Keep these three files during make clean
  66 no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)