1 # SPDX-License-Identifier: GPL-2.0-only 2 3 # Unlike the kernel space, exported headers are written in standard C. 4 # - Forbid C++ style comments 5 # - Use '__inline__', '__asm__' instead of 'inline', 'asm' 6 # 7 # -std=c90 (equivalent to -ansi) catches the violation of those. 8 # We cannot go as far as adding -Wpedantic since it emits too many warnings. 9 UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit-function-declaration 10 11 # In theory, we do not care -m32 or -m64 for header compile tests. 12 # It is here just because CONFIG_CC_CAN_LINK is tested with -m32 or -m64. 13 UAPI_CFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) 14 15 # USERCFLAGS might contain sysroot location for CC. 16 UAPI_CFLAGS += $(USERCFLAGS) 17 18 override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I $(obj) -I $(srctree)/usr/dummy-include 19 20 # The following are excluded for now because they fail to build. 21 # 22 # Do not add a new header to the blacklist without legitimate reason. 23 # Please consider to fix the header first. 24 # 25 # Sorted alphabetically. 26 no-header-test += asm/ucontext.h 27 no-header-test += drm/vmwgfx_drm.h 28 no-header-test += linux/am437x-vpfe.h 29 no-header-test += linux/coda.h 30 no-header-test += linux/cyclades.h 31 no-header-test += linux/errqueue.h 32 no-header-test += linux/hdlc/ioctl.h 33 no-header-test += linux/ivtv.h 34 no-header-test += linux/matroxfb.h 35 no-header-test += linux/omap3isp.h 36 no-header-test += linux/omapfb.h 37 no-header-test += linux/patchkey.h 38 no-header-test += linux/phonet.h 39 no-header-test += linux/sctp.h 40 no-header-test += linux/sysctl.h 41 no-header-test += linux/usb/audio.h 42 no-header-test += linux/v4l2-mediabus.h 43 no-header-test += linux/v4l2-subdev.h 44 no-header-test += linux/videodev2.h 45 no-header-test += linux/vm_sockets.h 46 no-header-test += sound/asequencer.h 47 no-header-test += sound/asoc.h 48 no-header-test += sound/asound.h 49 no-header-test += sound/compress_offload.h 50 no-header-test += sound/emu10k1.h 51 no-header-test += sound/sfnt_info.h 52 no-header-test += xen/evtchn.h 53 no-header-test += xen/gntdev.h 54 no-header-test += xen/privcmd.h 55 56 # More headers are broken in some architectures 57 58 ifeq ($(SRCARCH),arc) 59 no-header-test += linux/bpf_perf_event.h 60 endif 61 62 ifeq ($(SRCARCH),powerpc) 63 no-header-test += linux/bpf_perf_event.h 64 endif 65 66 ifeq ($(SRCARCH),sparc) 67 no-header-test += asm/uctx.h 68 no-header-test += asm/fbio.h 69 endif 70 71 # asm-generic/*.h is used by asm/*.h, and should not be included directly 72 no-header-test += asm-generic/% 73 74 always-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h' 2>/dev/null)) 75 76 # Include the header twice to detect missing include guard. 77 quiet_cmd_hdrtest = HDRTEST $< 78 cmd_hdrtest = \ 79 $(CC) $(c_flags) -fsyntax-only -x c /dev/null \ 80 $(if $(filter-out $(no-header-test), $*.h), -include $< -include $<); \ 81 $(PERL) $(src)/headers_check.pl $(obj) $(SRCARCH) $<; \ 82 touch $@ 83 84 $(obj)/%.hdrtest: $(obj)/%.h FORCE 85 $(call if_changed_dep,hdrtest) 86 87 # Since GNU Make 4.3, $(patsubst $(obj)/%/,%,$(wildcard $(obj)/*/)) works. 88 # To support older Make versions, use a somewhat tedious way. 89 clean-files += $(filter-out Makefile headers_check.pl, $(notdir $(wildcard $(obj)/*)))
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.