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TOMOYO Linux Cross Reference
Linux/usr/include/Makefile

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

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