xref: /freebsd/sys/conf/kern.pre.mk (revision 0957b409) 
1# $FreeBSD$
2
3# Part of a unified Makefile for building kernels.  This part contains all
4# of the definitions that need to be before %BEFORE_DEPEND.
5
6# Allow user to configure things that only effect src tree builds.
7# Note: This is duplicated from src.sys.mk to ensure that we include
8# /etc/src.conf when building the kernel. Kernels can be built without
9# the rest of /usr/src, but they still always process SRCCONF even though
10# the normal mechanisms to prevent that (compiling out of tree) won't
11# work. To ensure they do work, we have to duplicate thee few lines here.
12SRCCONF?=	/etc/src.conf
13.if (exists(${SRCCONF}) || ${SRCCONF} != "/etc/src.conf") && !target(_srcconf_included_)
14.include "${SRCCONF}"
15_srcconf_included_:
16.endif
17
18.include <bsd.own.mk>
19.include <bsd.compiler.mk>
20.include "kern.opts.mk"
21
22# The kernel build always occurs in the object directory which is .CURDIR.
23.if ${.MAKE.MODE:Unormal:Mmeta}
24.MAKE.MODE+=	curdirOk=yes
25.endif
26
27# The kernel build always expects .OBJDIR=.CURDIR.
28.OBJDIR: ${.CURDIR}
29
30.if defined(NO_OBJWALK) || ${MK_AUTO_OBJ} == "yes"
31NO_OBJWALK=		t
32NO_MODULES_OBJ=	t
33.endif
34.if !defined(NO_OBJWALK)
35_obj=		obj
36.endif
37
38# Can be overridden by makeoptions or /etc/make.conf
39KERNEL_KO?=	kernel
40KERNEL?=	kernel
41KODIR?=		/boot/${KERNEL}
42LDSCRIPT_NAME?=	ldscript.$M
43LDSCRIPT?=	$S/conf/${LDSCRIPT_NAME}
44
45M=		${MACHINE}
46
47AWK?=		awk
48CP?=		cp
49NM?=		nm
50OBJCOPY?=	objcopy
51SIZE?=		size
52
53.if defined(DEBUG)
54_MINUS_O=	-O
55CTFFLAGS+=	-g
56.else
57.if ${MACHINE_CPUARCH} == "powerpc"
58_MINUS_O=	-O	# gcc miscompiles some code at -O2
59.else
60_MINUS_O=	-O2
61.endif
62.endif
63.if ${MACHINE_CPUARCH} == "amd64"
64.if ${COMPILER_TYPE} == "clang"
65COPTFLAGS?=-O2 -pipe
66.else
67COPTFLAGS?=-O2 -frename-registers -pipe
68.endif
69.else
70COPTFLAGS?=${_MINUS_O} -pipe
71.endif
72.if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
73COPTFLAGS+= -fno-strict-aliasing
74.endif
75.if !defined(NO_CPU_COPTFLAGS)
76COPTFLAGS+= ${_CPUCFLAGS}
77.endif
78NOSTDINC= -nostdinc
79
80INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
81
82CFLAGS=	${COPTFLAGS} ${DEBUG}
83CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
84CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
85CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
86.if ${MACHINE_CPUARCH} == "mips"
87CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000 -DMACHINE_ARCH='"${MACHINE_ARCH}"'
88.endif
89CFLAGS.gcc+= -fno-common -fms-extensions -finline-limit=${INLINE_LIMIT}
90CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
91CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
92CFLAGS.gcc+= -fms-extensions
93.if defined(CFLAGS_ARCH_PARAMS)
94CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
95.endif
96WERROR?= -Werror
97
98# XXX LOCORE means "don't declare C stuff" not "for locore.s".
99ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
100
101.if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
102CFLAGS+=	-DGPROF
103CFLAGS.gcc+=	-falign-functions=16
104.if ${PROFLEVEL} >= 2
105CFLAGS+=	-DGPROF4 -DGUPROF
106PROF=		-pg
107.if ${COMPILER_TYPE} == "gcc"
108PROF+=		-mprofiler-epilogue
109.endif
110.else
111PROF=		-pg
112.endif
113.endif
114DEFINED_PROF=	${PROF}
115
116KUBSAN_ENABLED!=	grep KUBSAN opt_global.h || true ; echo
117.if !empty(KUBSAN_ENABLED)
118SAN_CFLAGS+=	-fsanitize=undefined
119.endif
120
121COVERAGE_ENABLED!=	grep COVERAGE opt_global.h || true ; echo
122.if !empty(COVERAGE_ENABLED)
123.if ${COMPILER_TYPE} == "clang" || \
124    (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100)
125SAN_CFLAGS+=	-fsanitize-coverage=trace-pc,trace-cmp
126.else
127SAN_CFLAGS+=	-fsanitize-coverage=trace-pc
128.endif
129.endif
130
131CFLAGS+=	${SAN_CFLAGS}
132
133GCOV_ENABLED!=	grep GCOV opt_global.h || true ; echo
134.if !empty(GCOV_ENABLED)
135.if ${COMPILER_TYPE} == "gcc"
136GCOV_CFLAGS+=	 -fprofile-arcs -ftest-coverage
137.endif
138.endif
139
140CFLAGS+=	${GCOV_CFLAGS}
141
142# Put configuration-specific C flags last (except for ${PROF}) so that they
143# can override the others.
144CFLAGS+=	${CONF_CFLAGS}
145
146.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
147LDFLAGS+=	-Wl,--build-id=sha1
148.endif
149
150.if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
151    ${MACHINE_CPUARCH} == "i386") && \
152    defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == ""
153.error amd64/arm64/i386 kernel requires linker ifunc support
154.endif
155.if ${MACHINE_CPUARCH} == "amd64"
156LDFLAGS+=	-Wl,-z max-page-size=2097152
157.if ${LINKER_TYPE} != "lld"
158LDFLAGS+=	-Wl,-z common-page-size=4096
159.else
160LDFLAGS+=	-Wl,-z -Wl,ifunc-noplt
161.endif
162.endif
163
164NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
165NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
166PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
167NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
168
169NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
170	  ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
171
172NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
173NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
174	-m ${LD_EMULATION} -o ${.TARGET} ${.ALLSRC:M*.fw}
175
176# for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
177ZSTD_C= ${CC} -c -DZSTD_HEAPMODE=1 -I$S/contrib/zstd/lib/freebsd ${CFLAGS} -I$S/contrib/zstd/lib -I$S/contrib/zstd/lib/common ${WERROR} -Wno-inline -Wno-missing-prototypes ${PROF} -U__BMI__ ${.IMPSRC}
178
179# Common for dtrace / zfs
180CDDL_CFLAGS=	-DFREEBSD_NAMECACHE -nostdinc -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S -I$S/cddl/contrib/opensolaris/common ${CFLAGS} -Wno-unknown-pragmas -Wno-missing-prototypes -Wno-undef -Wno-strict-prototypes -Wno-cast-qual -Wno-parentheses -Wno-redundant-decls -Wno-missing-braces -Wno-uninitialized -Wno-unused -Wno-inline -Wno-switch -Wno-pointer-arith -Wno-unknown-pragmas
181CDDL_CFLAGS+=	-include $S/cddl/compat/opensolaris/sys/debug_compat.h
182CDDL_C=		${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
183
184# Special flags for managing the compat compiles for ZFS
185ZFS_CFLAGS=	-DBUILDING_ZFS -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs
186ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common/fs/zfs/lua
187ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common/zmod
188ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/zfs
189ZFS_CFLAGS+=	${CDDL_CFLAGS}
190ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
191ZFS_C=		${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
192ZFS_S=		${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
193
194# Special flags for managing the compat compiles for DTrace
195DTRACE_CFLAGS=	-DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
196.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
197DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
198.endif
199DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP
200DTRACE_ASM_CFLAGS=	-x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
201DTRACE_C=	${CC} -c ${DTRACE_CFLAGS}	${WERROR} ${PROF} ${.IMPSRC}
202DTRACE_S=	${CC} -c ${DTRACE_ASM_CFLAGS}	${WERROR} ${.IMPSRC}
203
204# Special flags for managing the compat compiles for DTrace/FBT
205FBT_CFLAGS=	-DBUILDING_DTRACE -nostdinc -I$S/cddl/dev/fbt/${MACHINE_CPUARCH} -I$S/cddl/dev/fbt -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S ${CDDL_CFLAGS}
206.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
207FBT_CFLAGS+=	-I$S/cddl/dev/fbt/x86
208.endif
209FBT_C=		${CC} -c ${FBT_CFLAGS}		${WERROR} ${PROF} ${.IMPSRC}
210
211.if ${MK_CTF} != "no"
212NORMAL_CTFCONVERT=	${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
213.elif ${MAKE_VERSION} >= 5201111300
214NORMAL_CTFCONVERT=
215.else
216NORMAL_CTFCONVERT=	@:
217.endif
218
219# Linux Kernel Programming Interface C-flags
220LINUXKPI_INCLUDES=	-I$S/compat/linuxkpi/common/include
221LINUXKPI_C=		${NORMAL_C} ${LINUXKPI_INCLUDES}
222
223# Infiniband C flags.  Correct include paths and omit errors that linux
224# does not honor.
225OFEDINCLUDES=	-I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
226OFEDNOERR=	-Wno-cast-qual -Wno-pointer-arith
227OFEDCFLAGS=	${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
228		${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
229OFED_C_NOIMP=	${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
230OFED_C=		${OFED_C_NOIMP} ${.IMPSRC}
231
232GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
233SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
234SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
235SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
236SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
237SYSTEM_OBJS+= hack.pico
238
239MD_ROOT_SIZE_CONFIGURED!=	grep MD_ROOT_SIZE opt_md.h || true ; echo
240.if ${MFS_IMAGE:Uno} != "no"
241.if empty(MD_ROOT_SIZE_CONFIGURED)
242SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
243.endif
244.endif
245SYSTEM_LD= @${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
246	--no-warn-mismatch --warn-common --export-dynamic \
247	--dynamic-linker /red/herring \
248	-o ${.TARGET} -X ${SYSTEM_OBJS} vers.o
249SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
250	${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
251SYSTEM_DEP+= ${LDSCRIPT}
252
253# Calculate path for .m files early, if needed.
254.if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
255    (empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
256__MPATH!=find ${S:tA}/ -name \*_if.m
257.endif
258
259# MKMODULESENV is set here so that port makefiles can augment
260# them.
261
262MKMODULESENV+=	MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
263MKMODULESENV+=	MACHINE_CPUARCH=${MACHINE_CPUARCH}
264MKMODULESENV+=	MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
265MKMODULESENV+=	MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
266MKMODULESENV+=	ARCH_FLAGS="${ARCH_FLAGS}"
267.if (${KERN_IDENT} == LINT)
268MKMODULESENV+=	ALL_MODULES=LINT
269.endif
270.if defined(MODULES_OVERRIDE)
271MKMODULESENV+=	MODULES_OVERRIDE="${MODULES_OVERRIDE}"
272.endif
273.if defined(DEBUG)
274MKMODULESENV+=	DEBUG_FLAGS="${DEBUG}"
275.endif
276.if !defined(NO_MODULES)
277MKMODULESENV+=	__MPATH="${__MPATH}"
278.endif
279
280# Architecture and output format arguments for objcopy to convert image to
281# object file
282
283.if ${MFS_IMAGE:Uno} != "no"
284.if empty(MD_ROOT_SIZE_CONFIGURED)
285.if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
286EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
287.if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
288.undef EMBEDFS_FORMAT.${MACHINE_ARCH}
289.endif
290.endif
291
292.if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
293EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
294.if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
295.undef EMBEDFS_ARCH.${MACHINE_ARCH}
296.endif
297.endif
298
299EMBEDFS_FORMAT.arm?=		elf32-littlearm
300EMBEDFS_FORMAT.armv6?=		elf32-littlearm
301EMBEDFS_FORMAT.armv7?=		elf32-littlearm
302EMBEDFS_FORMAT.aarch64?=	elf64-littleaarch64
303EMBEDFS_FORMAT.mips?=		elf32-tradbigmips
304EMBEDFS_FORMAT.mipsel?=		elf32-tradlittlemips
305EMBEDFS_FORMAT.mips64?=		elf64-tradbigmips
306EMBEDFS_FORMAT.mips64el?=	elf64-tradlittlemips
307EMBEDFS_FORMAT.riscv?=		elf64-littleriscv
308.endif
309.endif
310
311# Detect kernel config options that force stack frames to be turned on.
312DDB_ENABLED!=	grep DDB opt_ddb.h || true ; echo
313DTR_ENABLED!=	grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
314HWPMC_ENABLED!=	grep HWPMC opt_hwpmc_hooks.h || true ; echo
315