This is xnu-8019. See this file in:
#
# Mach Operating System
# Copyright (c) 1986 Carnegie-Mellon University
# All rights reserved.  The CMU software License Agreement specifies
# the terms and conditions for use and redistribution.
#

export MakeInc_cmd=${SRCROOT}/makedefs/MakeInc.cmd
export MakeInc_def=${SRCROOT}/makedefs/MakeInc.def
export MakeInc_rule=${SRCROOT}/makedefs/MakeInc.rule
export MakeInc_dir=${SRCROOT}/makedefs/MakeInc.dir

include $(MakeInc_cmd)
include $(MakeInc_def)

#
# CFLAGS
#
CFLAGS+= -include meta_features.h -DLIBKERN_KERNEL_PRIVATE -DOSALLOCDEBUG=1
SFLAGS+= -include meta_features.h

# Runtime support functions don't interact well with LTO (9294679)
stack_protector.o_CFLAGS_ADD += $(CFLAGS_NOLTO_FLAG)

#
# Directories for mig generated files
#
COMP_SUBDIRS =

#
#  Make sure we don't remove this by accident if interrupted at the wrong
#  time.
#
.PRECIOUS: Makefile

#
#  Theses macros are filled in by the config program depending on the
#  current configuration.  The MACHDEP macro is replaced by the
#  contents of the machine dependent makefile template and the others
#  are replaced by the corresponding symbol definitions for the
#  configuration.
#

%OBJS

%LIBOBJS

%CFILES

%CXXFILES

%SFILES

%MACHDEP

#
# Machine-independent per-file flags
#

#
# Diagnostic opt-outs.  We need to make this list empty.
#
# DO NOT ADD MORE HERE.
#
# -Wno-cast-align
OSKext.cpo_CXXWARNFLAGS_ADD += -Wno-cast-align
OSKextLib.cpo_CXXWARNFLAGS_ADD += -Wno-cast-align
OSMetaClass.cpo_CXXWARNFLAGS_ADD += -Wno-cast-align
OSUnserialize.cpo_CXXWARNFLAGS_ADD += -Wno-cast-align
corecrypto_md5.o_CWARNFLAGS_ADD += -Wno-cast-align
corecrypto_sha1.o_CWARNFLAGS_ADD += -Wno-cast-align
# -Wno-cast-qual
OSKext.cpo_CXXWARNFLAGS_ADD += -Wno-cast-qual
compress.o_CWARNFLAGS_ADD += -Wno-cast-qual
deflate.o_CWARNFLAGS_ADD += -Wno-cast-qual
runtime.cpo_CXXWARNFLAGS_ADD += -Wno-cast-qual
trees.o_CWARNFLAGS_ADD += -Wno-cast-qual
uncompr.o_CWARNFLAGS_ADD += -Wno-cast-qual
# -Wno-implicit-int-conversion
OSUnserialize.cpo_CXXWARNFLAGS_ADD += -Wno-implicit-int-conversion
OSUnserializeXML.cpo_CXXWARNFLAGS_ADD += -Wno-implicit-int-conversion
kxld_sym.o_CWARNFLAGS_ADD += -Wno-implicit-int-conversion
log.o_CWARNFLAGS_ADD += -Wno-implicit-int-conversion
scanf.o_CWARNFLAGS_ADD += -Wno-implicit-int-conversion
# -Wno-missing-prototypes
OSRuntime.cpo_CXXWARNFLAGS_ADD += -Wno-missing-prototypes
# -Wno-shorten-64-to-32
OSKext.cpo_CXXWARNFLAGS_ADD += -Wno-shorten-64-to-32
OSUnserialize.cpo_CXXWARNFLAGS_ADD += -Wno-shorten-64-to-32
OSUnserializeXML.cpo_CXXWARNFLAGS_ADD += -Wno-shorten-64-to-32
log.o_CWARNFLAGS_ADD += -Wno-shorten-64-to-32
scanf.o_CWARNFLAGS_ADD += -Wno-shorten-64-to-32
# -Wno-sign-conversion
OSCollection.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSData.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSDebug.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSKext.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSKextVersion.o_CWARNFLAGS_ADD += -Wno-sign-conversion
OSMetaClass.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSNumber.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSObject.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSRuntime.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSSerializeBinary.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSSet.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSString.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSUnserialize.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
OSUnserializeXML.cpo_CXXWARNFLAGS_ADD += -Wno-sign-conversion
adler32.o_CWARNFLAGS_ADD += -Wno-sign-conversion
corecrypto_aes.o_CWARNFLAGS_ADD += -Wno-sign-conversion
corecrypto_aesxts.o_CWARNFLAGS_ADD += -Wno-sign-conversion
deflate.o_CWARNFLAGS_ADD += -Wno-sign-conversion
inet_aton.o_CWARNFLAGS_ADD += -Wno-sign-conversion
infback.o_CWARNFLAGS_ADD += -Wno-sign-conversion
inflate.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_array.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_copyright.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_dict.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_object.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_reloc.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_sym.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_symtab.o_CWARNFLAGS_ADD += -Wno-sign-conversion
kxld_util.o_CWARNFLAGS_ADD += -Wno-sign-conversion
log.o_CWARNFLAGS_ADD += -Wno-sign-conversion
refcnt.o_CWARNFLAGS_ADD += -Wno-sign-conversion
scanf.o_CWARNFLAGS_ADD += -Wno-sign-conversion
trees.o_CWARNFLAGS_ADD += -Wno-sign-conversion
uuid.o_CWARNFLAGS_ADD += -Wno-sign-conversion
# -Wno-unreachable-code
OSUnserialize.cpo_CXXWARNFLAGS_ADD += -Wno-unreachable-code
OSUnserializeXML.cpo_CXXWARNFLAGS_ADD += -Wno-unreachable-code
OSUnserialize.cpo_CXXWARNFLAGS_ADD += -Wno-unreachable-code-break
OSUnserializeXML.cpo_CXXWARNFLAGS_ADD += -Wno-unreachable-code-break
# -Wno-zero-as-null-pointer-constant
OSUnserialize.cpo_CXXWARNFLAGS_ADD += -Wno-zero-as-null-pointer-constant
OSUnserializeXML.cpo_CXXWARNFLAGS_ADD += -Wno-zero-as-null-pointer-constant

# Rebuild if per-file overrides change
${OBJS}: $(firstword $(MAKEFILE_LIST))

# Rebuild if global compile flags change
$(COBJS): .CFLAGS
.CFLAGS: ALWAYS
	$(_v)$(REPLACECONTENTS) $@ $(KCC) $(CFLAGS) $(INCFLAGS)
$(CXXOBJS): .CXXFLAGS
.CXXFLAGS: ALWAYS
	$(_v)$(REPLACECONTENTS) $@ $(KC++) $(CXXFLAGS) $(INCFLAGS)
$(SOBJS): .SFLAGS
.SFLAGS: ALWAYS
	$(_v)$(REPLACECONTENTS) $@ $(S_KCC) $(SFLAGS) $(INCFLAGS)

$(COMPONENT).filelist: $(OBJS)
	$(_v)for hib_file in ${HIB_FILES}; \
	do	\
		$(SEG_HACK) -n __HIB -o $${hib_file}__ $${hib_file} || exit 1; \
		mv $${hib_file}__ $${hib_file} || exit 1; \
	done
	@$(LOG_LDFILELIST) "$(COMPONENT)"
	$(_v)for obj in ${OBJS}; do	\
		 $(ECHO) $(TARGET)/$(CURRENT_KERNEL_CONFIG)/$${obj}; \
	done > $(COMPONENT).filelist

$(COMPONENT).libfilelist: $(LIBOBJS)
	@$(LOG_LDFILELIST) "lib$(COMPONENT)"
	$(_v)for obj in ${LIBOBJS}; do	\
		 $(ECHO) $(TARGET)/$(CURRENT_KERNEL_CONFIG)/$${obj}; \
	done > $(COMPONENT).libfilelist

ifeq ($(RC_ProjectName),xnu_libraries)
do_all: $(COMPONENT).libfilelist
else
do_all: $(COMPONENT).filelist
endif

do_build_all:: do_all

%RULES

include $(MakeInc_rule)
include $(MakeInc_dir)