Makefile.extrawarn 2.4 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768
  1. # SPDX-License-Identifier: GPL-2.0
  2. # ==========================================================================
  3. #
  4. # make W=... settings
  5. #
  6. # W=1 - warnings that may be relevant and does not occur too often
  7. # W=2 - warnings that occur quite often but may still be relevant
  8. # W=3 - the more obscure warnings, can most likely be ignored
  9. #
  10. # $(call cc-option, -W...) handles gcc -W.. options which
  11. # are not supported by all versions of the compiler
  12. # ==========================================================================
  13. KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
  14. ifeq ("$(origin W)", "command line")
  15. export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
  16. endif
  17. ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS
  18. warning- := $(empty)
  19. warning-1 := -Wextra -Wunused -Wno-unused-parameter
  20. warning-1 += -Wmissing-declarations
  21. warning-1 += -Wmissing-format-attribute
  22. warning-1 += $(call cc-option, -Wmissing-prototypes)
  23. warning-1 += -Wold-style-definition
  24. warning-1 += $(call cc-option, -Wmissing-include-dirs)
  25. warning-1 += $(call cc-option, -Wunused-but-set-variable)
  26. warning-1 += $(call cc-option, -Wunused-const-variable)
  27. warning-1 += $(call cc-option, -Wpacked-not-aligned)
  28. warning-1 += $(call cc-option, -Wstringop-truncation)
  29. warning-1 += $(call cc-disable-warning, missing-field-initializers)
  30. warning-1 += $(call cc-disable-warning, sign-compare)
  31. warning-2 := -Waggregate-return
  32. warning-2 += -Wcast-align
  33. warning-2 += -Wdisabled-optimization
  34. warning-2 += -Wnested-externs
  35. warning-2 += -Wshadow
  36. warning-2 += $(call cc-option, -Wlogical-op)
  37. warning-2 += $(call cc-option, -Wmissing-field-initializers)
  38. warning-2 += $(call cc-option, -Wsign-compare)
  39. warning-2 += $(call cc-option, -Wmaybe-uninitialized)
  40. warning-2 += $(call cc-option, -Wunused-macros)
  41. warning-3 := -Wbad-function-cast
  42. warning-3 += -Wcast-qual
  43. warning-3 += -Wconversion
  44. warning-3 += -Wpacked
  45. warning-3 += -Wpadded
  46. warning-3 += -Wpointer-arith
  47. warning-3 += -Wredundant-decls
  48. warning-3 += -Wswitch-default
  49. warning-3 += $(call cc-option, -Wpacked-bitfield-compat)
  50. warning-3 += $(call cc-option, -Wvla)
  51. warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
  52. warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
  53. warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
  54. ifeq ("$(strip $(warning))","")
  55. $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown)
  56. endif
  57. KBUILD_CFLAGS += $(warning)
  58. endif