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.
  9UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit-function-declaration
 10
 11override c_flags = $(UAPI_CFLAGS) -Wp,-MD,$(depfile) -I$(objtree)/usr/include
 12
 13# The following are excluded for now because they fail to build.
 14#
 15# Do not add a new header to the blacklist without legitimate reason.
 16# Please consider to fix the header first.
 17#
 18# Sorted alphabetically.
 19header-test- += asm/ipcbuf.h
 20header-test- += asm/msgbuf.h
 21header-test- += asm/sembuf.h
 22header-test- += asm/shmbuf.h
 23header-test- += asm/signal.h
 24header-test- += asm/ucontext.h
 25header-test- += drm/vmwgfx_drm.h
 26header-test- += linux/am437x-vpfe.h
 27header-test- += linux/android/binder.h
 28header-test- += linux/android/binderfs.h
 29header-test-$(CONFIG_CPU_BIG_ENDIAN) += linux/byteorder/big_endian.h
 30header-test-$(CONFIG_CPU_LITTLE_ENDIAN) += linux/byteorder/little_endian.h
 31header-test- += linux/coda.h
 32header-test- += linux/elfcore.h
 33header-test- += linux/errqueue.h
 34header-test- += linux/fsmap.h
 35header-test- += linux/hdlc/ioctl.h
 36header-test- += linux/ivtv.h
 37header-test- += linux/kexec.h
 38header-test- += linux/matroxfb.h
 39header-test- += linux/netfilter_ipv4/ipt_LOG.h
 40header-test- += linux/netfilter_ipv6/ip6t_LOG.h
 41header-test- += linux/nfc.h
 42header-test- += linux/omap3isp.h
 43header-test- += linux/omapfb.h
 44header-test- += linux/patchkey.h
 45header-test- += linux/phonet.h
 46header-test- += linux/reiserfs_xattr.h
 47header-test- += linux/scc.h
 48header-test- += linux/sctp.h
 49header-test- += linux/signal.h
 50header-test- += linux/sysctl.h
 51header-test- += linux/usb/audio.h
 52header-test- += linux/v4l2-mediabus.h
 53header-test- += linux/v4l2-subdev.h
 54header-test- += linux/videodev2.h
 55header-test- += linux/vm_sockets.h
 56header-test- += sound/asequencer.h
 57header-test- += sound/asoc.h
 58header-test- += sound/asound.h
 59header-test- += sound/compress_offload.h
 60header-test- += sound/emu10k1.h
 61header-test- += sound/sfnt_info.h
 62header-test- += xen/evtchn.h
 63header-test- += xen/gntdev.h
 64header-test- += xen/privcmd.h
 65
 66# More headers are broken in some architectures
 67
 68ifeq ($(SRCARCH),arc)
 69header-test- += linux/bpf_perf_event.h
 70endif
 71
 72ifeq ($(SRCARCH),ia64)
 73header-test- += asm/setup.h
 74header-test- += asm/sigcontext.h
 75header-test- += asm/perfmon.h
 76header-test- += asm/perfmon_default_smpl.h
 77header-test- += linux/if_bonding.h
 78endif
 79
 80ifeq ($(SRCARCH),mips)
 81header-test- += asm/stat.h
 82endif
 83
 84ifeq ($(SRCARCH),powerpc)
 85header-test- += asm/stat.h
 86header-test- += linux/bpf_perf_event.h
 87endif
 88
 89ifeq ($(SRCARCH),riscv)
 90header-test- += linux/bpf_perf_event.h
 91endif
 92
 93ifeq ($(SRCARCH),sparc)
 94header-test- += asm/stat.h
 95header-test- += asm/uctx.h
 96header-test- += asm/fbio.h
 97endif
 98
 99# asm-generic/*.h is used by asm/*.h, and should not be included directly
100header-test- += asm-generic/%
101
102# The rest are compile-tested
103header-test-y += $(filter-out $(header-test-), \
104			$(patsubst $(obj)/%,%, $(wildcard \
105			$(addprefix $(obj)/, *.h */*.h */*/*.h */*/*/*.h))))
106
107clean-files += $(filter-out Makefile, $(notdir $(wildcard $(obj)/*)))