# SPDX-License-Identifier: GPL-2.0-only # Unlike the kernel space, exported headers are written in standard C.#  - Forbid C++ style comments#  - Use '__inline__', '__asm__' instead of 'inline', 'asm'## -std=c90 (equivalent to -ansi) catches the violation of those.# We cannot go as far as adding -Wpedantic since it emits too many warnings.UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit-function-declaration override c_flags = $(UAPI_CFLAGS) -Wp,-MD,$(depfile) -I$(objtree)/usr/include # The following are excluded for now because they fail to build.## Do not add a new header to the blacklist without legitimate reason.# Please consider to fix the header first.## Sorted alphabetically.no-header-test += asm/shmbuf.hno-header-test += asm/signal.hno-header-test += asm/ucontext.hno-header-test += drm/vmwgfx_drm.hno-header-test += linux/am437x-vpfe.hno-header-test += linux/android/binder.hno-header-test += linux/android/binderfs.hno-header-test += linux/coda.hno-header-test += linux/elfcore.hno-header-test += linux/errqueue.hno-header-test += linux/fsmap.hno-header-test += linux/hdlc/ioctl.hno-header-test += linux/ivtv.hno-header-test += linux/kexec.hno-header-test += linux/matroxfb.hno-header-test += linux/nfc.hno-header-test += linux/omap3isp.hno-header-test += linux/omapfb.hno-header-test += linux/patchkey.hno-header-test += linux/phonet.hno-header-test += linux/reiserfs_xattr.hno-header-test += linux/sctp.hno-header-test += linux/signal.hno-header-test += linux/sysctl.hno-header-test += linux/usb/audio.hno-header-test += linux/v4l2-mediabus.hno-header-test += linux/v4l2-subdev.hno-header-test += linux/videodev2.hno-header-test += linux/vm_sockets.hno-header-test += sound/asequencer.hno-header-test += sound/asoc.hno-header-test += sound/asound.hno-header-test += sound/compress_offload.hno-header-test += sound/emu10k1.hno-header-test += sound/sfnt_info.hno-header-test += xen/evtchn.hno-header-test += xen/gntdev.hno-header-test += xen/privcmd.h # More headers are broken in some architectures ifeq ($(SRCARCH),arc)no-header-test += linux/bpf_perf_event.hendif ifeq ($(SRCARCH),ia64)no-header-test += asm/setup.hno-header-test += asm/sigcontext.hno-header-test += asm/perfmon.hno-header-test += asm/perfmon_default_smpl.hno-header-test += linux/if_bonding.hendif ifeq ($(SRCARCH),mips)no-header-test += asm/stat.hendif ifeq ($(SRCARCH),powerpc)no-header-test += asm/stat.hno-header-test += linux/bpf_perf_event.hendif ifeq ($(SRCARCH),riscv)no-header-test += linux/bpf_perf_event.hendif ifeq ($(SRCARCH),sparc)no-header-test += asm/stat.hno-header-test += asm/uctx.hno-header-test += asm/fbio.hendif # asm-generic/*.h is used by asm/*.h, and should not be included directlyno-header-test += asm-generic/% extra-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h' 2>/dev/null)) # Include the header to detect missing include guard.quiet_cmd_hdrtest = HDRTEST $<      cmd_hdrtest = \		$(CC) $(c_flags) -S -o /dev/null -x c /dev/null \			$(if $(filter-out $(no-header-test), $*.h), -include $< -include $<); \		$(PERL) $(srctree)/scripts/headers_check.pl $(obj) $(SRCARCH) $<; \		touch $@ $(obj)/%.hdrtest: $(obj)/%.h FORCE	$(call if_changed_dep,hdrtest) clean-files += $(filter-out Makefile, $(notdir $(wildcard $(obj)/*)))