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: releng/11.1/sys/conf/kern.pre.mk 316469 2017-04-03 20:46:55Z emaste $
    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 ${.MAKE.MODE:Unormal:Mmeta}
   24 .MAKE.MODE+=    curdirOk=yes
   25 .endif
   26 
   27 # Can be overridden by makeoptions or /etc/make.conf
   28 KERNEL_KO?=     kernel
   29 KERNEL?=        kernel
   30 KODIR?=         /boot/${KERNEL}
   31 LDSCRIPT_NAME?= ldscript.$M
   32 LDSCRIPT?=      $S/conf/${LDSCRIPT_NAME}
   33 
   34 M=              ${MACHINE}
   35 
   36 AWK?=           awk
   37 CP?=            cp
   38 LINT?=          lint
   39 NM?=            nm
   40 OBJCOPY?=       objcopy
   41 SIZE?=          size
   42 
   43 .if defined(DEBUG)
   44 _MINUS_O=       -O
   45 CTFFLAGS+=      -g
   46 .else
   47 .if ${MACHINE_CPUARCH} == "powerpc"
   48 _MINUS_O=       -O      # gcc miscompiles some code at -O2
   49 .else
   50 _MINUS_O=       -O2
   51 .endif
   52 .endif
   53 .if ${MACHINE_CPUARCH} == "amd64"
   54 .if ${COMPILER_TYPE} == "clang"
   55 COPTFLAGS?=-O2 -pipe
   56 .else
   57 COPTFLAGS?=-O2 -frename-registers -pipe
   58 .endif
   59 .else
   60 COPTFLAGS?=${_MINUS_O} -pipe
   61 .endif
   62 .if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
   63 COPTFLAGS+= -fno-strict-aliasing
   64 .endif
   65 .if !defined(NO_CPU_COPTFLAGS)
   66 COPTFLAGS+= ${_CPUCFLAGS}
   67 .endif
   68 NOSTDINC= -nostdinc
   69 
   70 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S
   71 
   72 CFLAGS= ${COPTFLAGS} ${DEBUG}
   73 CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
   74 CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
   75 CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
   76 .if ${MACHINE_CPUARCH} == "mips"
   77 CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000
   78 .endif
   79 CFLAGS.gcc+= -fno-common -fms-extensions -finline-limit=${INLINE_LIMIT}
   80 CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
   81 CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
   82 .if defined(CFLAGS_ARCH_PARAMS)
   83 CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
   84 .endif
   85 WERROR?= -Werror
   86 
   87 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
   88 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}} 
   89 
   90 .if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
   91 CFLAGS+=        -DGPROF
   92 CFLAGS.gcc+=    -falign-functions=16
   93 .if ${PROFLEVEL} >= 2
   94 CFLAGS+=        -DGPROF4 -DGUPROF
   95 PROF=           -pg
   96 .if ${COMPILER_TYPE} == "gcc"
   97 PROF+=          -mprofiler-epilogue
   98 .endif
   99 .else
  100 PROF=           -pg
  101 .endif
  102 .endif
  103 DEFINED_PROF=   ${PROF}
  104 
  105 # Put configuration-specific C flags last (except for ${PROF}) so that they
  106 # can override the others.
  107 CFLAGS+=        ${CONF_CFLAGS}
  108 
  109 # Optional linting. This can be overridden in /etc/make.conf.
  110 LINTFLAGS=      ${LINTOBJKERNFLAGS}
  111 
  112 NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
  113 NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
  114 PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
  115 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
  116 
  117 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
  118           ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
  119 
  120 NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
  121 NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
  122         -m ${LD_EMULATION} -o ${.TARGET} ${.ALLSRC:M*.fw}
  123 
  124 # Common for dtrace / zfs
  125 CDDL_CFLAGS=    -DFREEBSD_NAMECACHE -nostdinc -I$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
  126 CDDL_CFLAGS+=   -include $S/cddl/compat/opensolaris/sys/debug_compat.h
  127 CDDL_C=         ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
  128 
  129 # Special flags for managing the compat compiles for ZFS
  130 ZFS_CFLAGS=     -DBUILDING_ZFS -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs -I$S/cddl/contrib/opensolaris/uts/common/zmod -I$S/cddl/contrib/opensolaris/common/zfs ${CDDL_CFLAGS}
  131 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
  132 ZFS_C=          ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
  133 ZFS_S=          ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
  134 
  135 # Special flags for managing the compat compiles for DTrace
  136 DTRACE_CFLAGS=  -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
  137 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
  138 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
  139 .endif
  140 DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP
  141 DTRACE_ASM_CFLAGS=      -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
  142 DTRACE_C=       ${CC} -c ${DTRACE_CFLAGS}       ${WERROR} ${PROF} ${.IMPSRC}
  143 DTRACE_S=       ${CC} -c ${DTRACE_ASM_CFLAGS}   ${WERROR} ${.IMPSRC}
  144 
  145 # Special flags for managing the compat compiles for DTrace/FBT
  146 FBT_CFLAGS=     -DBUILDING_DTRACE -nostdinc -I$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}
  147 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
  148 FBT_CFLAGS+=    -I$S/cddl/dev/fbt/x86
  149 .endif
  150 FBT_C=          ${CC} -c ${FBT_CFLAGS}          ${WERROR} ${PROF} ${.IMPSRC}
  151 
  152 .if ${MK_CTF} != "no"
  153 NORMAL_CTFCONVERT=      ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
  154 .elif ${MAKE_VERSION} >= 5201111300
  155 NORMAL_CTFCONVERT=
  156 .else
  157 NORMAL_CTFCONVERT=      @:
  158 .endif
  159 
  160 NORMAL_LINT=    ${LINT} ${LINTFLAGS} ${CFLAGS:M-[DIU]*} ${.IMPSRC}
  161 
  162 # Linux Kernel Programming Interface C-flags
  163 LINUXKPI_INCLUDES=      -I$S/compat/linuxkpi/common/include
  164 LINUXKPI_C=             ${NORMAL_C} ${LINUXKPI_INCLUDES}
  165 
  166 # Infiniband C flags.  Correct include paths and omit errors that linux
  167 # does not honor.
  168 OFEDINCLUDES=   -I$S/ofed/include ${LINUXKPI_INCLUDES}
  169 OFEDNOERR=      -Wno-cast-qual -Wno-pointer-arith
  170 OFEDCFLAGS=     ${CFLAGS:N-I*} ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
  171 OFED_C_NOIMP=   ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
  172 OFED_C=         ${OFED_C_NOIMP} ${.IMPSRC}
  173 
  174 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
  175 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
  176 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
  177 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
  178 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
  179 SYSTEM_OBJS+= hack.pico
  180 
  181 MD_ROOT_SIZE_CONFIGURED!=       grep MD_ROOT_SIZE opt_md.h || true ; echo
  182 .if ${MFS_IMAGE:Uno} != "no"
  183 .if empty(MD_ROOT_SIZE_CONFIGURED)
  184 SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
  185 .endif
  186 .endif
  187 SYSTEM_LD= @${LD} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} --no-warn-mismatch \
  188         --warn-common --export-dynamic --dynamic-linker /red/herring \
  189         -o ${.TARGET} -X ${SYSTEM_OBJS} vers.o
  190 SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
  191         ${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
  192 SYSTEM_DEP+= ${LDSCRIPT}
  193 
  194 # Calculate path for .m files early, if needed.
  195 .if !defined(NO_MODULES) && !defined(__MPATH)
  196 __MPATH!=find ${S:tA}/ -name \*_if.m
  197 .endif
  198 
  199 # MKMODULESENV is set here so that port makefiles can augment
  200 # them.
  201 
  202 MKMODULESENV+=  MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
  203 MKMODULESENV+=  MACHINE_CPUARCH=${MACHINE_CPUARCH}
  204 MKMODULESENV+=  MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
  205 MKMODULESENV+=  MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
  206 .if (${KERN_IDENT} == LINT)
  207 MKMODULESENV+=  ALL_MODULES=LINT
  208 .endif
  209 .if defined(MODULES_OVERRIDE)
  210 MKMODULESENV+=  MODULES_OVERRIDE="${MODULES_OVERRIDE}"
  211 .endif
  212 .if defined(DEBUG)
  213 MKMODULESENV+=  DEBUG_FLAGS="${DEBUG}"
  214 .endif
  215 .if !defined(NO_MODULES)
  216 MKMODULESENV+=  __MPATH="${__MPATH}"
  217 .endif
  218 
  219 # Architecture and output format arguments for objdump to convert image to
  220 # object file
  221 
  222 .if ${MFS_IMAGE:Uno} != "no"
  223 .if empty(MD_ROOT_SIZE_CONFIGURED)
  224 .if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
  225 EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
  226 .if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
  227 .undef EMBEDFS_FORMAT.${MACHINE_ARCH}
  228 .endif
  229 .endif
  230 
  231 .if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
  232 EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
  233 .if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
  234 .undef EMBEDFS_ARCH.${MACHINE_ARCH}
  235 .endif
  236 .endif
  237 
  238 EMBEDFS_FORMAT.arm?=            elf32-littlearm
  239 EMBEDFS_FORMAT.armv6?=          elf32-littlearm
  240 EMBEDFS_FORMAT.mips?=           elf32-tradbigmips
  241 EMBEDFS_FORMAT.mipsel?=         elf32-tradlittlemips
  242 EMBEDFS_FORMAT.mips64?=         elf64-tradbigmips
  243 EMBEDFS_FORMAT.mips64el?=       elf64-tradlittlemips
  244 EMBEDFS_FORMAT.riscv?=          elf64-littleriscv
  245 .endif
  246 .endif
  247 
  248 # Detect kernel config options that force stack frames to be turned on.
  249 DDB_ENABLED!=   grep DDB opt_ddb.h || true ; echo
  250 DTR_ENABLED!=   grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
  251 HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo

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