# 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$(objtree)/usr/include # The following are excluded for now because they fail to build.## Do not add a new header to the blacklist without legitimate reason.# Please consider to fix the header first.## Sorted alphabetically.header-test- += asm/ipcbuf.hheader-test- += asm/msgbuf.hheader-test- += asm/sembuf.hheader-test- += asm/shmbuf.hheader-test- += asm/signal.hheader-test- += asm/ucontext.hheader-test- += drm/vmwgfx_drm.hheader-test- += linux/am437x-vpfe.hheader-test- += linux/android/binder.hheader-test- += linux/android/binderfs.hheader-test-$(CONFIG_CPU_BIG_ENDIAN) += linux/byteorder/big_endian.hheader-test-$(CONFIG_CPU_LITTLE_ENDIAN) += linux/byteorder/little_endian.hheader-test- += linux/coda.hheader-test- += linux/coda_psdev.hheader-test- += linux/elfcore.hheader-test- += linux/errqueue.hheader-test- += linux/fsmap.hheader-test- += linux/hdlc/ioctl.hheader-test- += linux/ivtv.hheader-test- += linux/jffs2.hheader-test- += linux/kexec.hheader-test- += linux/matroxfb.hheader-test- += linux/netfilter_bridge/ebtables.hheader-test- += linux/netfilter_ipv4/ipt_LOG.hheader-test- += linux/netfilter_ipv6/ip6t_LOG.hheader-test- += linux/nfc.hheader-test- += linux/omap3isp.hheader-test- += linux/omapfb.hheader-test- += linux/patchkey.hheader-test- += linux/phonet.hheader-test- += linux/reiserfs_xattr.hheader-test- += linux/scc.hheader-test- += linux/sctp.hheader-test- += linux/signal.hheader-test- += linux/sysctl.hheader-test- += linux/usb/audio.hheader-test- += linux/v4l2-mediabus.hheader-test- += linux/v4l2-subdev.hheader-test- += linux/videodev2.hheader-test- += linux/vm_sockets.hheader-test- += scsi/scsi_bsg_fc.hheader-test- += scsi/scsi_netlink.hheader-test- += scsi/scsi_netlink_fc.hheader-test- += sound/asequencer.hheader-test- += sound/asoc.hheader-test- += sound/asound.hheader-test- += sound/compress_offload.hheader-test- += sound/emu10k1.hheader-test- += sound/sfnt_info.hheader-test- += sound/sof/eq.hheader-test- += sound/sof/fw.hheader-test- += sound/sof/header.hheader-test- += sound/sof/manifest.hheader-test- += sound/sof/trace.hheader-test- += xen/evtchn.hheader-test- += xen/gntdev.hheader-test- += xen/privcmd.h # More headers are broken in some architectures ifeq ($(SRCARCH),arc)header-test- += linux/bpf_perf_event.hendif ifeq ($(SRCARCH),ia64)header-test- += asm/setup.hheader-test- += asm/sigcontext.hheader-test- += asm/perfmon.hheader-test- += asm/perfmon_default_smpl.hheader-test- += linux/if_bonding.hendif ifeq ($(SRCARCH),mips)header-test- += asm/stat.hendif ifeq ($(SRCARCH),powerpc)header-test- += asm/stat.hheader-test- += linux/bpf_perf_event.hendif ifeq ($(SRCARCH),riscv)header-test- += linux/bpf_perf_event.hendif ifeq ($(SRCARCH),sparc)header-test- += asm/stat.hheader-test- += asm/uctx.hheader-test- += asm/fbio.hendif # asm-generic/*.h is used by asm/*.h, and should not be included directlyheader-test- += asm-generic/% # The rest are compile-testedheader-test-y += $(filter-out $(header-test-), \			$(patsubst $(obj)/%,%, $(wildcard \			$(addprefix $(obj)/, *.h */*.h */*/*.h */*/*/*.h)))) # For GNU Make <= 4.2.1, $(wildcard $(obj)/*/) matches to not only directories# but also regular files. Use $(filter %/, ...) just in case.clean-dirs += $(patsubst $(obj)/%/,%,$(filter %/, $(wildcard $(obj)/*/)))