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d6fc9fcb MY |
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 | ||
9371f86e MY |
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, $(KBUILD_CFLAGS)) | |
14 | ||
30a77297 | 15 | override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I$(objtree)/usr/include |
d6fc9fcb MY |
16 | |
17 | # The following are excluded for now because they fail to build. | |
18 | # | |
19 | # Do not add a new header to the blacklist without legitimate reason. | |
20 | # Please consider to fix the header first. | |
21 | # | |
22 | # Sorted alphabetically. | |
0186b126 MY |
23 | no-header-test += asm/shmbuf.h |
24 | no-header-test += asm/signal.h | |
25 | no-header-test += asm/ucontext.h | |
26 | no-header-test += drm/vmwgfx_drm.h | |
27 | no-header-test += linux/am437x-vpfe.h | |
28 | no-header-test += linux/android/binder.h | |
29 | no-header-test += linux/android/binderfs.h | |
30 | no-header-test += linux/coda.h | |
0186b126 MY |
31 | no-header-test += linux/errqueue.h |
32 | no-header-test += linux/fsmap.h | |
33 | no-header-test += linux/hdlc/ioctl.h | |
34 | no-header-test += linux/ivtv.h | |
35 | no-header-test += linux/kexec.h | |
36 | no-header-test += linux/matroxfb.h | |
37 | no-header-test += linux/nfc.h | |
38 | no-header-test += linux/omap3isp.h | |
39 | no-header-test += linux/omapfb.h | |
40 | no-header-test += linux/patchkey.h | |
41 | no-header-test += linux/phonet.h | |
42 | no-header-test += linux/reiserfs_xattr.h | |
43 | no-header-test += linux/sctp.h | |
44 | no-header-test += linux/signal.h | |
45 | no-header-test += linux/sysctl.h | |
46 | no-header-test += linux/usb/audio.h | |
47 | no-header-test += linux/v4l2-mediabus.h | |
48 | no-header-test += linux/v4l2-subdev.h | |
49 | no-header-test += linux/videodev2.h | |
50 | no-header-test += linux/vm_sockets.h | |
51 | no-header-test += sound/asequencer.h | |
52 | no-header-test += sound/asoc.h | |
53 | no-header-test += sound/asound.h | |
54 | no-header-test += sound/compress_offload.h | |
55 | no-header-test += sound/emu10k1.h | |
56 | no-header-test += sound/sfnt_info.h | |
57 | no-header-test += xen/evtchn.h | |
58 | no-header-test += xen/gntdev.h | |
59 | no-header-test += xen/privcmd.h | |
d6fc9fcb MY |
60 | |
61 | # More headers are broken in some architectures | |
62 | ||
63 | ifeq ($(SRCARCH),arc) | |
0186b126 | 64 | no-header-test += linux/bpf_perf_event.h |
d6fc9fcb MY |
65 | endif |
66 | ||
67 | ifeq ($(SRCARCH),ia64) | |
0186b126 MY |
68 | no-header-test += asm/setup.h |
69 | no-header-test += asm/sigcontext.h | |
0186b126 | 70 | no-header-test += linux/if_bonding.h |
d6fc9fcb MY |
71 | endif |
72 | ||
73 | ifeq ($(SRCARCH),mips) | |
0186b126 | 74 | no-header-test += asm/stat.h |
d6fc9fcb MY |
75 | endif |
76 | ||
77 | ifeq ($(SRCARCH),powerpc) | |
0186b126 MY |
78 | no-header-test += asm/stat.h |
79 | no-header-test += linux/bpf_perf_event.h | |
d6fc9fcb MY |
80 | endif |
81 | ||
82 | ifeq ($(SRCARCH),riscv) | |
0186b126 | 83 | no-header-test += linux/bpf_perf_event.h |
d6fc9fcb MY |
84 | endif |
85 | ||
d6fc9fcb | 86 | ifeq ($(SRCARCH),sparc) |
0186b126 MY |
87 | no-header-test += asm/stat.h |
88 | no-header-test += asm/uctx.h | |
89 | no-header-test += asm/fbio.h | |
d6fc9fcb MY |
90 | endif |
91 | ||
92 | # asm-generic/*.h is used by asm/*.h, and should not be included directly | |
0186b126 | 93 | no-header-test += asm-generic/% |
d6fc9fcb | 94 | |
cf6b58ab | 95 | extra-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h' 2>/dev/null)) |
fcbb8461 | 96 | |
00d76a0c | 97 | # Include the header twice to detect missing include guard. |
fcbb8461 | 98 | quiet_cmd_hdrtest = HDRTEST $< |
7ecaf069 MY |
99 | cmd_hdrtest = \ |
100 | $(CC) $(c_flags) -S -o /dev/null -x c /dev/null \ | |
0186b126 | 101 | $(if $(filter-out $(no-header-test), $*.h), -include $< -include $<); \ |
7ecaf069 MY |
102 | $(PERL) $(srctree)/scripts/headers_check.pl $(obj) $(SRCARCH) $<; \ |
103 | touch $@ | |
fcbb8461 MY |
104 | |
105 | $(obj)/%.hdrtest: $(obj)/%.h FORCE | |
106 | $(call if_changed_dep,hdrtest) | |
d6fc9fcb | 107 | |
1634f2bf | 108 | clean-files += $(filter-out Makefile, $(notdir $(wildcard $(obj)/*))) |