LXR linux/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
   8bounds-file := include/generated/bounds.h
   9
  10always  := $(bounds-file)
  11targets := kernel/bounds.s
  12
  13$(bounds-file): kernel/bounds.s FORCE
  14        $(call filechk,offsets,__LINUX_BOUNDS_H__)
  15
  16#####
  17# Generate timeconst.h
  18
  19timeconst-file := include/generated/timeconst.h
  20
  21targets += $(timeconst-file)
  22
  23filechk_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
  31offsets-file := include/generated/asm-offsets.h
  32
  33always  += $(offsets-file)
  34targets += arch/$(SRCARCH)/kernel/asm-offsets.s
  35
  36arch/$(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
  44always += missing-syscalls
  45targets += missing-syscalls
  46
  47quiet_cmd_syscalls = CALL    $<
  48      cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
  49
  50missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
  51        $(call cmd,syscalls)
  52
  53#####
  54# Check atomic headers are up-to-date
  55
  56always += old-atomics
  57targets += old-atomics
  58
  59quiet_cmd_atomics = CALL    $<
  60      cmd_atomics = $(CONFIG_SHELL) $<
  61
  62old-atomics: scripts/atomic/check-atomics.sh FORCE
  63        $(call cmd,atomics)
  64
  65# Keep these three files during make clean
  66no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)
  67