projects/linux·blob v6.19 · refs

86 lines · 2.8 KiB

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 -Werror=implicit-function-declaration
10
11override c_flags = $(KBUILD_USERCFLAGS) $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I $(obj) -I $(srctree)/usr/dummy-include
12
13# The following are excluded for now because they fail to build.
14#
15# Do not add a new header to the blacklist without legitimate reason.
16# Please consider to fix the header first.
17#
18# Sorted alphabetically.
19no-header-test += asm/ucontext.h
20no-header-test += drm/vmwgfx_drm.h
21no-header-test += linux/am437x-vpfe.h
22no-header-test += linux/coda.h
23no-header-test += linux/cyclades.h
24no-header-test += linux/errqueue.h
25no-header-test += linux/hdlc/ioctl.h
26no-header-test += linux/ivtv.h
27no-header-test += linux/matroxfb.h
28no-header-test += linux/omap3isp.h
29no-header-test += linux/omapfb.h
30no-header-test += linux/patchkey.h
31no-header-test += linux/phonet.h
32no-header-test += linux/sctp.h
33no-header-test += linux/sysctl.h
34no-header-test += linux/usb/audio.h
35no-header-test += linux/v4l2-mediabus.h
36no-header-test += linux/v4l2-subdev.h
37no-header-test += linux/videodev2.h
38no-header-test += linux/vm_sockets.h
39no-header-test += sound/asequencer.h
40no-header-test += sound/asoc.h
41no-header-test += sound/asound.h
42no-header-test += sound/compress_offload.h
43no-header-test += sound/emu10k1.h
44no-header-test += sound/sfnt_info.h
45no-header-test += xen/evtchn.h
46no-header-test += xen/gntdev.h
47no-header-test += xen/privcmd.h
48
49# More headers are broken in some architectures
50
51ifeq ($(SRCARCH),arc)
52no-header-test += linux/bpf_perf_event.h
53endif
54
55ifeq ($(SRCARCH),openrisc)
56no-header-test += linux/bpf_perf_event.h
57endif
58
59ifeq ($(SRCARCH),powerpc)
60no-header-test += linux/bpf_perf_event.h
61endif
62
63ifeq ($(SRCARCH),sparc)
64no-header-test += asm/uctx.h
65no-header-test += asm/fbio.h
66endif
67
68# asm-generic/*.h is used by asm/*.h, and should not be included directly
69no-header-test += asm-generic/%
70
71always-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h' 2>/dev/null))
72
73# Include the header twice to detect missing include guard.
74quiet_cmd_hdrtest = HDRTEST $<
75 cmd_hdrtest = \
76 $(CC) $(c_flags) -fsyntax-only -Werror -x c /dev/null \
77 $(if $(filter-out $(no-header-test), $*.h), -include $< -include $<); \
78 $(PERL) $(src)/headers_check.pl $(obj) $<; \
79 touch $@
80
81$(obj)/%.hdrtest: $(obj)/%.h $(src)/headers_check.pl FORCE
82 $(call if_changed_dep,hdrtest)
83
84# Since GNU Make 4.3, $(patsubst $(obj)/%/,%,$(wildcard $(obj)/*/)) works.
85# To support older Make versions, use a somewhat tedious way.
86clean-files += $(filter-out Makefile headers_check.pl, $(notdir $(wildcard $(obj)/*)))