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freebsd-nq/sys/conf/kern.pre.mk
Ed Maste 581ade97d5 Perform kernel linker ifunc test only for builds 
dvl reported that "make installkernel" failed with "amd64/arm64/i386
kernel requires linker ifunc support."  This test should apply to builds
only; the linker is not used at install time.

I think the same (ifunc-supporting) linker used to build the kernel
should be detected at install time in usual cases (and so not trigger
this error).  However, there is no reason to disallow the install, if
for some reason the expected linker isn't the one tested at install
time.

PR:		251580
Reported by:	dvl
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
2020-12-27 12:46:51 -05:00

369 lines
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Makefile
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# $FreeBSD$
# Part of a unified Makefile for building kernels. This part contains all
# of the definitions that need to be before %BEFORE_DEPEND.
# Allow user to configure things that only effect src tree builds.
# Note: This is duplicated from src.sys.mk to ensure that we include
# /etc/src.conf when building the kernel. Kernels can be built without
# the rest of /usr/src, but they still always process SRCCONF even though
# the normal mechanisms to prevent that (compiling out of tree) won't
# work. To ensure they do work, we have to duplicate thee few lines here.
SRCCONF?= /etc/src.conf
.if (exists(${SRCCONF}) || ${SRCCONF} != "/etc/src.conf") && !target(_srcconf_included_)
.include "${SRCCONF}"
_srcconf_included_:
.endif
.include <bsd.own.mk>
.include <bsd.compiler.mk>
.include "kern.opts.mk"
# The kernel build always occurs in the object directory which is .CURDIR.
.if ${.MAKE.MODE:Unormal:Mmeta}
.MAKE.MODE+= curdirOk=yes
.endif
# The kernel build always expects .OBJDIR=.CURDIR.
.OBJDIR: ${.CURDIR}
.if defined(NO_OBJWALK) || ${MK_AUTO_OBJ} == "yes"
NO_OBJWALK= t
NO_MODULES_OBJ= t
.endif
.if !defined(NO_OBJWALK)
_obj= obj
.endif
# Can be overridden by makeoptions or /etc/make.conf
KERNEL_KO?= kernel
KERNEL?= kernel
KODIR?= /boot/${KERNEL}
LDSCRIPT_NAME?= ldscript.$M
LDSCRIPT?= $S/conf/${LDSCRIPT_NAME}
M= ${MACHINE}
AWK?= awk
CP?= cp
NM?= nm
OBJCOPY?= objcopy
SIZE?= size
.if defined(DEBUG)
CTFFLAGS+= -g
.endif
.if ${MACHINE_CPUARCH} == "amd64" && ${COMPILER_TYPE} != "clang"
_COPTFLAGS_EXTRA=-frename-registers
.else
_COPTFLAGS_EXTRA=
.endif
COPTFLAGS?=-O2 -pipe ${_COPTFLAGS_EXTRA}
.if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
COPTFLAGS+= -fno-strict-aliasing
.endif
.if !defined(NO_CPU_COPTFLAGS)
COPTFLAGS+= ${_CPUCFLAGS}
.endif
NOSTDINC= -nostdinc
INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S -I$S/contrib/ck/include
CFLAGS= ${COPTFLAGS} ${DEBUG}
CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
.if ${MACHINE_CPUARCH} == "mips"
CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000 -DMACHINE_ARCH='"${MACHINE_ARCH}"'
.endif
CFLAGS.gcc+= -fms-extensions -finline-limit=${INLINE_LIMIT}
CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
CFLAGS.gcc+= -fms-extensions
.if defined(CFLAGS_ARCH_PARAMS)
CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
.endif
WERROR?= -Werror
# The following should be removed no earlier than LLVM11 being imported into the
# tree, to ensure we don't regress the build. LLVM11 and GCC10 will switch the
# default over to -fno-common, making this redundant.
CFLAGS+= -fno-common
# XXX LOCORE means "don't declare C stuff" not "for locore.s".
ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
.if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
CFLAGS+= -DGPROF
CFLAGS.gcc+= -falign-functions=16
.if ${PROFLEVEL} >= 2
CFLAGS+= -DGPROF4 -DGUPROF
PROF= -pg
.if ${COMPILER_TYPE} == "gcc"
PROF+= -mprofiler-epilogue
.endif
.else
PROF= -pg
.endif
.endif
DEFINED_PROF= ${PROF}
KCSAN_ENABLED!= grep KCSAN opt_global.h || true ; echo
.if !empty(KCSAN_ENABLED)
SAN_CFLAGS+= -fsanitize=thread
.endif
KUBSAN_ENABLED!= grep KUBSAN opt_global.h || true ; echo
.if !empty(KUBSAN_ENABLED)
SAN_CFLAGS+= -fsanitize=undefined
.endif
COVERAGE_ENABLED!= grep COVERAGE opt_global.h || true ; echo
.if !empty(COVERAGE_ENABLED)
.if ${COMPILER_TYPE} == "clang" || \
(${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100)
SAN_CFLAGS+= -fsanitize-coverage=trace-pc,trace-cmp
.else
SAN_CFLAGS+= -fsanitize-coverage=trace-pc
.endif
.endif
CFLAGS+= ${SAN_CFLAGS}
GCOV_ENABLED!= grep GCOV opt_global.h || true ; echo
.if !empty(GCOV_ENABLED)
.if ${COMPILER_TYPE} == "gcc"
GCOV_CFLAGS+= -fprofile-arcs -ftest-coverage
.endif
.endif
CFLAGS+= ${GCOV_CFLAGS}
# Put configuration-specific C flags last (except for ${PROF}) so that they
# can override the others.
CFLAGS+= ${CONF_CFLAGS}
.if defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mbuild-id}
LDFLAGS+= --build-id=sha1
.endif
.if (${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
${MACHINE_CPUARCH} == "i386" || ${MACHINE} == "powerpc") && \
defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} == "" && \
!make(install)
.error amd64/arm64/i386/ppc* kernel requires linker ifunc support
.endif
.if ${MACHINE_CPUARCH} == "amd64"
LDFLAGS+= -z max-page-size=2097152
.if ${LINKER_TYPE} != "lld"
LDFLAGS+= -z common-page-size=4096
.else
.if defined(LINKER_FEATURES) && !${LINKER_FEATURES:Mifunc-noplt}
.warning "Linker ${LD} does not support -z ifunc-noplt -> ifunc calls are unoptimized."
.else
LDFLAGS+= -z notext -z ifunc-noplt
.endif
.endif
.endif # ${MACHINE_CPUARCH} == "amd64"
.if ${MACHINE_CPUARCH} == "riscv"
# Hack: Work around undefined weak symbols being out of range when linking with
# LLD (address is a PC-relative calculation, and BFD works around this by
# rewriting the instructions to generate an absolute address of 0); -fPIE
# avoids this since it uses the GOT for all extern symbols, which is overly
# inefficient for us. Drop once undefined weak symbols work with medany.
.if ${LINKER_TYPE} == "lld"
CFLAGS+= -fPIE
.endif
.endif
NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
NORMAL_FWO= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} -o ${.TARGET} \
$S/kern/firmw.S -DFIRMW_FILE="${.ALLSRC:M*.fw}" \
-DFIRMW_SYMBOL="${.ALLSRC:M*.fw:C/[-.\/]/_/g}"
# for ZSTD in the kernel (include zstd/lib/freebsd before other CFLAGS)
ZSTD_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__ \
-DZSTD_NO_INTRINSICS \
${.IMPSRC}
# https://github.com/facebook/zstd/commit/812e8f2a [zstd 1.4.1]
# "Note that [GCC] autovectorization still does not do a good job on the
# optimized version, so it's turned off via attribute and flag. I found
# that neither attribute nor command-line flag were entirely successful in
# turning off vectorization, which is why there were both."
.if ${COMPILER_TYPE} == "gcc"
ZSTD_DECOMPRESS_BLOCK_FLAGS= -fno-tree-vectorize
.endif
ZINCDIR=$S/contrib/openzfs/include
# Common for dtrace / zfs
CDDL_CFLAGS= \
-DFREEBSD_NAMECACHE \
-D_SYS_VMEM_H_ \
-D__KERNEL \
-D__KERNEL__ \
-nostdinc \
-include $S/modules/zfs/static_ccompile.h \
-I${ZINCDIR} \
-I${ZINCDIR}/os/freebsd \
-I${ZINCDIR}/os/freebsd/spl \
-I${ZINCDIR}/os/freebsd/zfs \
-I$S/modules/zfs \
-I$S/contrib/openzfs/module/zstd/include \
${CFLAGS} \
-Wno-cast-qual \
-Wno-duplicate-decl-specifier \
-Wno-inline \
-Wno-missing-braces \
-Wno-missing-prototypes \
-Wno-nested-externs \
-Wno-parentheses \
-Wno-pointer-arith \
-Wno-redundant-decls \
-Wno-strict-prototypes \
-Wno-switch \
-Wno-undef \
-Wno-uninitialized \
-Wno-unknown-pragmas \
-Wno-unused \
-include ${ZINCDIR}/os/freebsd/spl/sys/ccompile.h \
-I$S/cddl/contrib/opensolaris/uts/common \
-I$S -I$S/cddl/compat/opensolaris
CDDL_C= ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
# Special flags for managing the compat compiles for ZFS
ZFS_CFLAGS+= ${CDDL_CFLAGS} -DBUILDING_ZFS -DHAVE_UIO_ZEROCOPY \
-DWITH_NETDUMP -D__KERNEL__ -D_SYS_CONDVAR_H_ -DSMP \
-DIN_FREEBSD_BASE -DHAVE_KSID
.if ${MACHINE_ARCH} == "amd64"
ZFS_CFLAGS+= -DHAVE_AVX2 -DHAVE_AVX -D__x86_64 -DHAVE_SSE2 -DHAVE_AVX512F \
-DHAVE_SSSE3 -DHAVE_AVX512BW
.endif
.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc" || \
${MACHINE_ARCH} == "powerpcspe" || ${MACHINE_ARCH} == "arm"
ZFS_CFLAGS+= -DBITS_PER_LONG=32
.else
ZFS_CFLAGS+= -DBITS_PER_LONG=64
.endif
ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
ZFS_C= ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
ZFS_RPC_C= ${CC} -c ${ZFS_CFLAGS} -DHAVE_RPC_TYPES ${WERROR} ${PROF} ${.IMPSRC}
ZFS_S= ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
# Special flags for managing the compat compiles for DTrace
DTRACE_CFLAGS= -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
.endif
DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP -I$S/cddl/compat/opensolaris
DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/common
DTRACE_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
DTRACE_C= ${CC} -c ${DTRACE_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
DTRACE_S= ${CC} -c ${DTRACE_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
# Special flags for managing the compat compiles for DTrace/FBT
FBT_CFLAGS= -DBUILDING_DTRACE -nostdinc -I$S/cddl/dev/fbt/${MACHINE_CPUARCH} -I$S/cddl/dev/fbt ${CDDL_CFLAGS} -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common
.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
FBT_CFLAGS+= -I$S/cddl/dev/fbt/x86
.endif
FBT_C= ${CC} -c ${FBT_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
.if ${MK_CTF} != "no"
NORMAL_CTFCONVERT= ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
.elif ${MAKE_VERSION} >= 5201111300
NORMAL_CTFCONVERT=
.else
NORMAL_CTFCONVERT= @:
.endif
# Linux Kernel Programming Interface C-flags
LINUXKPI_INCLUDES= -I$S/compat/linuxkpi/common/include
LINUXKPI_C= ${NORMAL_C} ${LINUXKPI_INCLUDES}
# Infiniband C flags. Correct include paths and omit errors that linux
# does not honor.
OFEDINCLUDES= -I$S/ofed/include -I$S/ofed/include/uapi ${LINUXKPI_INCLUDES}
OFEDNOERR= -Wno-cast-qual -Wno-pointer-arith
OFEDCFLAGS= ${CFLAGS:N-I*} -DCONFIG_INFINIBAND_USER_MEM \
${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
OFED_C_NOIMP= ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
OFED_C= ${OFED_C_NOIMP} ${.IMPSRC}
# mlxfw C flags.
MLXFW_C= ${OFED_C_NOIMP} \
-I${SRCTOP}/sys/contrib/xz-embedded/freebsd \
-I${SRCTOP}/sys/contrib/xz-embedded/linux/lib/xz \
${.IMPSRC}
GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
SYSTEM_OBJS+= hack.pico
KEYMAP=kbdcontrol -P ${SRCTOP}/share/vt/keymaps -P ${SRCTOP}/share/syscons/keymaps
KEYMAP_FIX=sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /'
MD_ROOT_SIZE_CONFIGURED!= grep MD_ROOT_SIZE opt_md.h || true ; echo
.if ${MFS_IMAGE:Uno} != "no"
.if empty(MD_ROOT_SIZE_CONFIGURED)
SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
.endif
.endif
SYSTEM_LD_BASECMD= \
${LD} -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \
--no-warn-mismatch --warn-common --export-dynamic \
--dynamic-linker /red/herring -X
SYSTEM_LD= @${SYSTEM_LD_BASECMD} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
SYSTEM_DEP+= ${LDSCRIPT}
# Calculate path for .m files early, if needed.
.if !defined(NO_MODULES) && !defined(__MPATH) && !make(install) && \
(empty(.MAKEFLAGS:M-V) || defined(NO_SKIP_MPATH))
__MPATH!=find ${S:tA}/ -name \*_if.m
.endif
# MKMODULESENV is set here so that port makefiles can augment
# them.
MKMODULESENV+= MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
MKMODULESENV+= MACHINE_CPUARCH=${MACHINE_CPUARCH}
MKMODULESENV+= MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
MKMODULESENV+= MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
MKMODULESENV+= ARCH_FLAGS="${ARCH_FLAGS}"
.if (${KERN_IDENT} == LINT)
MKMODULESENV+= ALL_MODULES=LINT
.endif
.if defined(MODULES_OVERRIDE)
MKMODULESENV+= MODULES_OVERRIDE="${MODULES_OVERRIDE}"
.endif
.if defined(DEBUG)
MKMODULESENV+= DEBUG_FLAGS="${DEBUG}"
.endif
.if !defined(NO_MODULES)
MKMODULESENV+= __MPATH="${__MPATH}"
.endif
# Detect kernel config options that force stack frames to be turned on.
DDB_ENABLED!= grep DDB opt_ddb.h || true ; echo
DTR_ENABLED!= grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo
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