The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/conf/kern.pre.mk

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    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.
   12 SRCCONF?=       /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: ${.CURDIR}
   29 
   30 # Can be overridden by makeoptions or /etc/make.conf
   31 KERNEL_KO?=     kernel
   32 KERNEL?=        kernel
   33 KODIR?=         /boot/${KERNEL}
   34 LDSCRIPT_NAME?= ldscript.$M
   35 LDSCRIPT?=      $S/conf/${LDSCRIPT_NAME}
   36 
   37 M=              ${MACHINE}
   38 
   39 AWK?=           awk
   40 CP?=            cp
   41 LINT?=          lint
   42 NM?=            nm
   43 OBJCOPY?=       objcopy
   44 SIZE?=          size
   45 
   46 .if defined(DEBUG)
   47 _MINUS_O=       -O
   48 CTFFLAGS+=      -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 ${COMPILER_TYPE} == "clang"
   58 COPTFLAGS?=-O2 -pipe
   59 .else
   60 COPTFLAGS?=-O2 -frename-registers -pipe
   61 .endif
   62 .else
   63 COPTFLAGS?=${_MINUS_O} -pipe
   64 .endif
   65 .if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
   66 COPTFLAGS+= -fno-strict-aliasing
   67 .endif
   68 .if !defined(NO_CPU_COPTFLAGS)
   69 COPTFLAGS+= ${_CPUCFLAGS}
   70 .endif
   71 NOSTDINC= -nostdinc
   72 
   73 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S
   74 
   75 CFLAGS= ${COPTFLAGS} ${DEBUG}
   76 CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
   77 CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
   78 CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
   79 .if ${MACHINE_CPUARCH} == "mips"
   80 CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000
   81 .endif
   82 CFLAGS.gcc+= -fno-common -fms-extensions -finline-limit=${INLINE_LIMIT}
   83 CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
   84 CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
   85 .if defined(CFLAGS_ARCH_PARAMS)
   86 CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
   87 .endif
   88 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} < 50000
   89 WERROR?=        -Wno-error
   90 .else
   91 WERROR?=        -Werror
   92 .endif
   93 
   94 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
   95 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}} 
   96 
   97 .if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
   98 CFLAGS+=        -DGPROF
   99 CFLAGS.gcc+=    -falign-functions=16
  100 .if ${PROFLEVEL} >= 2
  101 CFLAGS+=        -DGPROF4 -DGUPROF
  102 PROF=           -pg
  103 .if ${COMPILER_TYPE} == "gcc"
  104 PROF+=          -mprofiler-epilogue
  105 .endif
  106 .else
  107 PROF=           -pg
  108 .endif
  109 .endif
  110 DEFINED_PROF=   ${PROF}
  111 
  112 # Put configuration-specific C flags last (except for ${PROF}) so that they
  113 # can override the others.
  114 CFLAGS+=        ${CONF_CFLAGS}
  115 
  116 .if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
  117 LDFLAGS+=       -Wl,--build-id=sha1
  118 .endif
  119 
  120 # Optional linting. This can be overridden in /etc/make.conf.
  121 LINTFLAGS=      ${LINTOBJKERNFLAGS}
  122 
  123 NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
  124 NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
  125 PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
  126 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
  127 
  128 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
  129           ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
  130 
  131 NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
  132 NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
  133         -m ${LD_EMULATION} -o ${.TARGET} ${.ALLSRC:M*.fw}
  134 
  135 # Common for dtrace / zfs
  136 CDDL_CFLAGS=    -DFREEBSD_NAMECACHE -nostdinc -I$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
  137 CDDL_CFLAGS+=   -include $S/cddl/compat/opensolaris/sys/debug_compat.h
  138 CDDL_C=         ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
  139 
  140 # Special flags for managing the compat compiles for ZFS
  141 ZFS_CFLAGS=     -DBUILDING_ZFS -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs
  142 ZFS_CFLAGS+=    -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs/lua
  143 ZFS_CFLAGS+=    -I$S/cddl/contrib/opensolaris/uts/common/zmod
  144 ZFS_CFLAGS+=    -I$S/cddl/contrib/opensolaris/common/zfs
  145 ZFS_CFLAGS+=    ${CDDL_CFLAGS}
  146 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
  147 ZFS_C=          ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
  148 ZFS_S=          ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
  149 
  150 # Special flags for managing the compat compiles for DTrace
  151 DTRACE_CFLAGS=  -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
  152 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
  153 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
  154 .endif
  155 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP
  156 DTRACE_ASM_CFLAGS=      -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
  157 DTRACE_C=       ${CC} -c ${DTRACE_CFLAGS}       ${WERROR} ${PROF} ${.IMPSRC}
  158 DTRACE_S=       ${CC} -c ${DTRACE_ASM_CFLAGS}   ${WERROR} ${.IMPSRC}
  159 
  160 # Special flags for managing the compat compiles for DTrace/FBT
  161 FBT_CFLAGS=     -DBUILDING_DTRACE -nostdinc -I$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}
  162 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
  163 FBT_CFLAGS+=    -I$S/cddl/dev/fbt/x86
  164 .endif
  165 FBT_C=          ${CC} -c ${FBT_CFLAGS}          ${WERROR} ${PROF} ${.IMPSRC}
  166 
  167 .if ${MK_CTF} != "no"
  168 NORMAL_CTFCONVERT=      ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
  169 .elif ${MAKE_VERSION} >= 5201111300
  170 NORMAL_CTFCONVERT=
  171 .else
  172 NORMAL_CTFCONVERT=      @:
  173 .endif
  174 
  175 NORMAL_LINT=    ${LINT} ${LINTFLAGS} ${CFLAGS:M-[DIU]*} ${.IMPSRC}
  176 
  177 # Linux Kernel Programming Interface C-flags
  178 LINUXKPI_INCLUDES=      -I$S/compat/linuxkpi/common/include
  179 LINUXKPI_C=             ${NORMAL_C} ${LINUXKPI_INCLUDES}
  180 
  181 # Infiniband C flags.  Correct include paths and omit errors that linux
  182 # does not honor.
  183 OFEDINCLUDES=   -I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
  184 OFEDNOERR=      -Wno-cast-qual -Wno-pointer-arith
  185 OFEDCFLAGS=     ${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
  186                 ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
  187 OFED_C_NOIMP=   ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
  188 OFED_C=         ${OFED_C_NOIMP} ${.IMPSRC}
  189 
  190 # mlxfw C flags.
  191 MLXFW_C=        ${OFED_C_NOIMP} \
  192                 -I$S/contrib/xz-embedded/freebsd \
  193                 -I$S/contrib/xz-embedded/linux/lib/xz \
  194                 ${.IMPSRC}
  195 
  196 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
  197 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
  198 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
  199 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
  200 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
  201 SYSTEM_OBJS+= hack.pico
  202 
  203 MD_ROOT_SIZE_CONFIGURED!=       grep MD_ROOT_SIZE opt_md.h || true ; echo
  204 .if ${MFS_IMAGE:Uno} != "no"
  205 .if empty(MD_ROOT_SIZE_CONFIGURED)
  206 SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
  207 .endif
  208 .endif
  209 SYSTEM_LD= @${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
  210         --no-warn-mismatch --warn-common --export-dynamic \
  211         --dynamic-linker /red/herring \
  212         -o ${.TARGET} -X ${SYSTEM_OBJS} vers.o
  213 SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
  214         ${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
  215 SYSTEM_DEP+= ${LDSCRIPT}
  216 
  217 # Calculate path for .m files early, if needed.
  218 .if !defined(NO_MODULES) && !defined(__MPATH)
  219 __MPATH!=find ${S:tA}/ -name \*_if.m
  220 .endif
  221 
  222 # MKMODULESENV is set here so that port makefiles can augment
  223 # them.
  224 
  225 MKMODULESENV+=  MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
  226 MKMODULESENV+=  MACHINE_CPUARCH=${MACHINE_CPUARCH}
  227 MKMODULESENV+=  MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
  228 MKMODULESENV+=  MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
  229 MKMODULESENV+=  ARCH_FLAGS="${ARCH_FLAGS}"
  230 .if (${KERN_IDENT} == LINT)
  231 MKMODULESENV+=  ALL_MODULES=LINT
  232 .endif
  233 .if defined(MODULES_OVERRIDE)
  234 MKMODULESENV+=  MODULES_OVERRIDE="${MODULES_OVERRIDE}"
  235 .endif
  236 .if defined(DEBUG)
  237 MKMODULESENV+=  DEBUG_FLAGS="${DEBUG}"
  238 .endif
  239 .if !defined(NO_MODULES)
  240 MKMODULESENV+=  __MPATH="${__MPATH}"
  241 .endif
  242 
  243 # Architecture and output format arguments for objcopy to convert image to
  244 # object file
  245 
  246 .if ${MFS_IMAGE:Uno} != "no"
  247 .if empty(MD_ROOT_SIZE_CONFIGURED)
  248 .if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
  249 EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
  250 .if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
  251 .undef EMBEDFS_FORMAT.${MACHINE_ARCH}
  252 .endif
  253 .endif
  254 
  255 .if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
  256 EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
  257 .if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
  258 .undef EMBEDFS_ARCH.${MACHINE_ARCH}
  259 .endif
  260 .endif
  261 
  262 EMBEDFS_FORMAT.arm?=            elf32-littlearm
  263 EMBEDFS_FORMAT.armv6?=          elf32-littlearm
  264 EMBEDFS_FORMAT.aarch64?=        elf64-littleaarch64
  265 EMBEDFS_FORMAT.mips?=           elf32-tradbigmips
  266 EMBEDFS_FORMAT.mipsel?=         elf32-tradlittlemips
  267 EMBEDFS_FORMAT.mips64?=         elf64-tradbigmips
  268 EMBEDFS_FORMAT.mips64el?=       elf64-tradlittlemips
  269 EMBEDFS_FORMAT.riscv64?=        elf64-littleriscv
  270 .endif
  271 .endif
  272 
  273 # Detect kernel config options that force stack frames to be turned on.
  274 DDB_ENABLED!=   grep DDB opt_ddb.h || true ; echo
  275 DTR_ENABLED!=   grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
  276 HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo

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