kern.pre.mk revision 331769 
1# $FreeBSD: stable/11/sys/conf/kern.pre.mk 331769 2018-03-30 18:06:29Z hselasky $
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: ${.CURDIR}
29
30# Can be overridden by makeoptions or /etc/make.conf
31KERNEL_KO?=	kernel
32KERNEL?=	kernel
33KODIR?=		/boot/${KERNEL}
34LDSCRIPT_NAME?=	ldscript.$M
35LDSCRIPT?=	$S/conf/${LDSCRIPT_NAME}
36
37M=		${MACHINE}
38
39AWK?=		awk
40CP?=		cp
41LINT?=		lint
42NM?=		nm
43OBJCOPY?=	objcopy
44SIZE?=		size
45
46.if defined(DEBUG)
47_MINUS_O=	-O
48CTFFLAGS+=	-g
49.else
50.if ${MACHINE_CPUARCH} == "powerpc"
51_MINUS_O=	-O	# gcc miscompiles some code at -O2
52.else
53_MINUS_O=	-O2
54.endif
55.endif
56.if ${MACHINE_CPUARCH} == "amd64"
57.if ${COMPILER_TYPE} == "clang"
58COPTFLAGS?=-O2 -pipe
59.else
60COPTFLAGS?=-O2 -frename-registers -pipe
61.endif
62.else
63COPTFLAGS?=${_MINUS_O} -pipe
64.endif
65.if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
66COPTFLAGS+= -fno-strict-aliasing
67.endif
68.if !defined(NO_CPU_COPTFLAGS)
69COPTFLAGS+= ${_CPUCFLAGS}
70.endif
71NOSTDINC= -nostdinc
72
73INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S
74
75CFLAGS=	${COPTFLAGS} ${DEBUG}
76CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
77CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
78CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
79.if ${MACHINE_CPUARCH} == "mips"
80CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000
81.endif
82CFLAGS.gcc+= -fno-common -fms-extensions -finline-limit=${INLINE_LIMIT}
83CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
84CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
85.if defined(CFLAGS_ARCH_PARAMS)
86CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
87.endif
88WERROR?= -Werror
89
90# XXX LOCORE means "don't declare C stuff" not "for locore.s".
91ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}} 
92
93.if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
94CFLAGS+=	-DGPROF
95CFLAGS.gcc+=	-falign-functions=16
96.if ${PROFLEVEL} >= 2
97CFLAGS+=	-DGPROF4 -DGUPROF
98PROF=		-pg
99.if ${COMPILER_TYPE} == "gcc"
100PROF+=		-mprofiler-epilogue
101.endif
102.else
103PROF=		-pg
104.endif
105.endif
106DEFINED_PROF=	${PROF}
107
108# Put configuration-specific C flags last (except for ${PROF}) so that they
109# can override the others.
110CFLAGS+=	${CONF_CFLAGS}
111
112.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
113LDFLAGS+=	-Wl,--build-id=sha1
114.endif
115
116# Optional linting. This can be overridden in /etc/make.conf.
117LINTFLAGS=	${LINTOBJKERNFLAGS}
118
119NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
120NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
121PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
122NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
123
124NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
125	  ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
126
127NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
128NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
129	-m ${LD_EMULATION} -o ${.TARGET} ${.ALLSRC:M*.fw}
130
131# Common for dtrace / zfs
132CDDL_CFLAGS=	-DFREEBSD_NAMECACHE -nostdinc -I$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
133CDDL_CFLAGS+=	-include $S/cddl/compat/opensolaris/sys/debug_compat.h
134CDDL_C=		${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
135
136# Special flags for managing the compat compiles for ZFS
137ZFS_CFLAGS=	-DBUILDING_ZFS -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs
138ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common/fs/zfs/lua
139ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/common/zmod
140ZFS_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/zfs
141ZFS_CFLAGS+=	${CDDL_CFLAGS}
142ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
143ZFS_C=		${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
144ZFS_S=		${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
145
146# Special flags for managing the compat compiles for DTrace
147DTRACE_CFLAGS=	-DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
148.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
149DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
150.endif
151DTRACE_CFLAGS+=	-I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP
152DTRACE_ASM_CFLAGS=	-x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
153DTRACE_C=	${CC} -c ${DTRACE_CFLAGS}	${WERROR} ${PROF} ${.IMPSRC}
154DTRACE_S=	${CC} -c ${DTRACE_ASM_CFLAGS}	${WERROR} ${.IMPSRC}
155
156# Special flags for managing the compat compiles for DTrace/FBT
157FBT_CFLAGS=	-DBUILDING_DTRACE -nostdinc -I$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}
158.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
159FBT_CFLAGS+=	-I$S/cddl/dev/fbt/x86
160.endif
161FBT_C=		${CC} -c ${FBT_CFLAGS}		${WERROR} ${PROF} ${.IMPSRC}
162
163.if ${MK_CTF} != "no"
164NORMAL_CTFCONVERT=	${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
165.elif ${MAKE_VERSION} >= 5201111300
166NORMAL_CTFCONVERT=
167.else
168NORMAL_CTFCONVERT=	@:
169.endif
170
171NORMAL_LINT=	${LINT} ${LINTFLAGS} ${CFLAGS:M-[DIU]*} ${.IMPSRC}
172
173# Linux Kernel Programming Interface C-flags
174LINUXKPI_INCLUDES=	-I$S/compat/linuxkpi/common/include
175LINUXKPI_C=		${NORMAL_C} ${LINUXKPI_INCLUDES}
176
177# Infiniband C flags.  Correct include paths and omit errors that linux
178# does not honor.
179OFEDINCLUDES=	-I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
180OFEDNOERR=	-Wno-cast-qual -Wno-pointer-arith
181OFEDCFLAGS=	${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
182		${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
183OFED_C_NOIMP=	${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
184OFED_C=		${OFED_C_NOIMP} ${.IMPSRC}
185
186GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
187SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
188SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
189SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
190SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
191SYSTEM_OBJS+= hack.pico
192
193MD_ROOT_SIZE_CONFIGURED!=	grep MD_ROOT_SIZE opt_md.h || true ; echo
194.if ${MFS_IMAGE:Uno} != "no"
195.if empty(MD_ROOT_SIZE_CONFIGURED)
196SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
197.endif
198.endif
199SYSTEM_LD= @${LD} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} --no-warn-mismatch \
200	--warn-common --export-dynamic --dynamic-linker /red/herring \
201	-o ${.TARGET} -X ${SYSTEM_OBJS} vers.o
202SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
203	${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
204SYSTEM_DEP+= ${LDSCRIPT}
205
206# Calculate path for .m files early, if needed.
207.if !defined(NO_MODULES) && !defined(__MPATH)
208__MPATH!=find ${S:tA}/ -name \*_if.m
209.endif
210
211# MKMODULESENV is set here so that port makefiles can augment
212# them.
213
214MKMODULESENV+=	MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
215MKMODULESENV+=	MACHINE_CPUARCH=${MACHINE_CPUARCH}
216MKMODULESENV+=	MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
217MKMODULESENV+=	MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
218MKMODULESENV+=	ARCH_FLAGS="${ARCH_FLAGS}"
219.if (${KERN_IDENT} == LINT)
220MKMODULESENV+=	ALL_MODULES=LINT
221.endif
222.if defined(MODULES_OVERRIDE)
223MKMODULESENV+=	MODULES_OVERRIDE="${MODULES_OVERRIDE}"
224.endif
225.if defined(DEBUG)
226MKMODULESENV+=	DEBUG_FLAGS="${DEBUG}"
227.endif
228.if !defined(NO_MODULES)
229MKMODULESENV+=	__MPATH="${__MPATH}"
230.endif
231
232# Architecture and output format arguments for objdump to convert image to
233# object file
234
235.if ${MFS_IMAGE:Uno} != "no"
236.if empty(MD_ROOT_SIZE_CONFIGURED)
237.if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
238EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
239.if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
240.undef EMBEDFS_FORMAT.${MACHINE_ARCH}
241.endif
242.endif
243
244.if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
245EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
246.if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
247.undef EMBEDFS_ARCH.${MACHINE_ARCH}
248.endif
249.endif
250
251EMBEDFS_FORMAT.arm?=		elf32-littlearm
252EMBEDFS_FORMAT.armv6?=		elf32-littlearm
253EMBEDFS_FORMAT.aarch64?=	elf64-littleaarch64
254EMBEDFS_FORMAT.mips?=		elf32-tradbigmips
255EMBEDFS_FORMAT.mipsel?=		elf32-tradlittlemips
256EMBEDFS_FORMAT.mips64?=		elf64-tradbigmips
257EMBEDFS_FORMAT.mips64el?=	elf64-tradlittlemips
258EMBEDFS_FORMAT.riscv?=		elf64-littleriscv
259.endif
260.endif
261
262# Detect kernel config options that force stack frames to be turned on.
263DDB_ENABLED!=	grep DDB opt_ddb.h || true ; echo
264DTR_ENABLED!=	grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
265HWPMC_ENABLED!=	grep HWPMC opt_hwpmc_hooks.h || true ; echo
266