90 lines · plain
1# SPDX-License-Identifier: GPL-2.0-only2 3# Unlike the kernel space, exported headers are written in standard C.4# - Forbid C++ style comments5# - 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-declaration10 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 -m64.13UAPI_CFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))14 15# USERCFLAGS might contain sysroot location for CC.16UAPI_CFLAGS += $(USERCFLAGS)17 18override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I $(obj) -I $(srctree)/usr/dummy-include19 20# The following are excluded for now because they fail to build.21#22# Do not add a new header to the blacklist without legitimate reason.23# Please consider to fix the header first.24#25# Sorted alphabetically.26no-header-test += asm/ucontext.h27no-header-test += drm/vmwgfx_drm.h28no-header-test += linux/am437x-vpfe.h29no-header-test += linux/coda.h30no-header-test += linux/cyclades.h31no-header-test += linux/errqueue.h32no-header-test += linux/hdlc/ioctl.h33no-header-test += linux/ivtv.h34no-header-test += linux/matroxfb.h35no-header-test += linux/omap3isp.h36no-header-test += linux/omapfb.h37no-header-test += linux/patchkey.h38no-header-test += linux/phonet.h39no-header-test += linux/sctp.h40no-header-test += linux/sysctl.h41no-header-test += linux/usb/audio.h42no-header-test += linux/v4l2-mediabus.h43no-header-test += linux/v4l2-subdev.h44no-header-test += linux/videodev2.h45no-header-test += linux/vm_sockets.h46no-header-test += sound/asequencer.h47no-header-test += sound/asoc.h48no-header-test += sound/asound.h49no-header-test += sound/compress_offload.h50no-header-test += sound/emu10k1.h51no-header-test += sound/sfnt_info.h52no-header-test += xen/evtchn.h53no-header-test += xen/gntdev.h54no-header-test += xen/privcmd.h55 56# More headers are broken in some architectures57 58ifeq ($(SRCARCH),arc)59no-header-test += linux/bpf_perf_event.h60endif61 62ifeq ($(SRCARCH),powerpc)63no-header-test += linux/bpf_perf_event.h64endif65 66ifeq ($(SRCARCH),sparc)67no-header-test += asm/uctx.h68no-header-test += asm/fbio.h69endif70 71# asm-generic/*.h is used by asm/*.h, and should not be included directly72no-header-test += asm-generic/%73 74always-y := $(patsubst $(obj)/%.h,%.hdrtest, $(shell find $(obj) -name '*.h' 2>/dev/null))75 76# Include the header twice to detect missing include guard.77quiet_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 FORCE85 $(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.89clean-files += $(filter-out Makefile headers_check.pl, $(notdir $(wildcard $(obj)/*)))90