1 # SPDX-License-Identifier: GPL-2.0-only
2
3 # Unlike the kernel space, exported headers ar
4 # - Forbid C++ style comments
5 # - Use '__inline__', '__asm__' instead of 'i
6 #
7 # -std=c90 (equivalent to -ansi) catches the v
8 # We cannot go as far as adding -Wpedantic sin
9 UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit
10
11 # In theory, we do not care -m32 or -m64 for h
12 # It is here just because CONFIG_CC_CAN_LINK i
13 UAPI_CFLAGS += $(filter -m32 -m64 --target=%,
14
15 # USERCFLAGS might contain sysroot location fo
16 UAPI_CFLAGS += $(USERCFLAGS)
17
18 override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(d
19
20 # The following are excluded for now because t
21 #
22 # Do not add a new header to the blacklist wit
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 architecture
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 shou
72 no-header-test += asm-generic/%
73
74 always-y := $(patsubst $(obj)/%.h,%.hdrtest, $
75
76 # Include the header twice to detect missing i
77 quiet_cmd_hdrtest = HDRTEST $<
78 cmd_hdrtest = \
79 $(CC) $(c_flags) -fsyntax-only
80 $(if $(filter-out $(no
81 $(PERL) $(src)/headers_check.p
82 touch $@
83
84 $(obj)/%.hdrtest: $(obj)/%.h FORCE
85 $(call if_changed_dep,hdrtest)
86
87 # Since GNU Make 4.3, $(patsubst $(obj)/%/,%,$
88 # To support older Make versions, use a somewh
89 clean-files += $(filter-out Makefile headers_c
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