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freebsd-nq/share/mk/src.opts.mk
Dimitry Andric cbafd2630b Add support for selectively enabling LLVM targets 
This makes it possible, through src.conf(5) settings, to select which
LLVM targets you want to build during buildworld.  The current list is:

* (WITH|WITHOUT)_LLVM_TARGET_AARCH64
* (WITH|WITHOUT)_LLVM_TARGET_ARM
* (WITH|WITHOUT)_LLVM_TARGET_MIPS
* (WITH|WITHOUT)_LLVM_TARGET_POWERPC
* (WITH|WITHOUT)_LLVM_TARGET_SPARC
* (WITH|WITHOUT)_LLVM_TARGET_X86

To not influence anything right now, all of these are on by default, in
situations where clang is enabled.

Selectively turning a few targets off manually should work.  Turning on
only one target should work too, even if that target does not correspond
to the build architecture.  (In that case, LLVM_NATIVE_ARCH will not be
defined, and you can only use the resulting clang executable for
cross-compiling.)

I performed a few measurements on one of the FreeBSD.org reference
machines, building clang from scratch, with all targets enabled, and
with only the x86 target enabled.  The latter was ~12% faster in real
time (on a 32-core box), and ~14% faster in user time.  For a full
buildworld the difference will probably be less pronounced, though.

Reviewed by:	bdrewery
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D11077
2018-06-22 15:00:00 +00:00

533 lines
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Makefile
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# $FreeBSD$
#
# Option file for FreeBSD /usr/src builds.
#
# Users define WITH_FOO and WITHOUT_FOO on the command line or in /etc/src.conf
# and /etc/make.conf files. These translate in the build system to MK_FOO={yes,no}
# with sensible (usually) defaults.
#
# Makefiles must include bsd.opts.mk after defining specific MK_FOO options that
# are applicable for that Makefile (typically there are none, but sometimes there
# are exceptions). Recursive makes usually add MK_FOO=no for options that they wish
# to omit from that make.
#
# Makefiles must include bsd.mkopt.mk before they test the value of any MK_FOO
# variable.
#
# Makefiles may also assume that this file is included by src.opts.mk should it
# need variables defined there prior to the end of the Makefile where
# bsd.{subdir,lib.bin}.mk is traditionally included.
#
# The old-style YES_FOO and NO_FOO are being phased out. No new instances of them
# should be added. Old instances should be removed since they were just to
# bridge the gap between FreeBSD 4 and FreeBSD 5.
#
# Makefiles should never test WITH_FOO or WITHOUT_FOO directly (although an
# exception is made for _WITHOUT_SRCONF which turns off this mechanism
# completely inside bsd.*.mk files).
#
.if !target(__<src.opts.mk>__)
__<src.opts.mk>__:
.include <bsd.own.mk>
#
# Define MK_* variables (which are either "yes" or "no") for users
# to set via WITH_*/WITHOUT_* in /etc/src.conf and override in the
# make(1) environment.
# These should be tested with `== "no"' or `!= "no"' in makefiles.
# The NO_* variables should only be set by makefiles for variables
# that haven't been converted over.
#
# These options are used by the src builds. Those listed in
# __DEFAULT_YES_OPTIONS default to 'yes' and will build unless turned
# off. __DEFAULT_NO_OPTIONS will default to 'no' and won't build
# unless turned on. Any options listed in 'BROKEN_OPTIONS' will be
# hard-wired to 'no'. "Broken" here means not working or
# not-appropriate and/or not supported. It doesn't imply something is
# wrong with the code. There's not a single good word for this, so
# BROKEN was selected as the least imperfect one considered at the
# time. Options are added to BROKEN_OPTIONS list on a per-arch basis.
# At this time, there's no provision for mutually incompatible options.
__DEFAULT_YES_OPTIONS = \
ACCT \
ACPI \
AMD \
APM \
AT \
ATM \
AUDIT \
AUTHPF \
AUTOFS \
BHYVE \
BINUTILS \
BINUTILS_BOOTSTRAP \
BLACKLIST \
BLUETOOTH \
BOOT \
BOOTPARAMD \
BOOTPD \
BSD_CPIO \
BSDINSTALL \
BSNMP \
BZIP2 \
CALENDAR \
CAPSICUM \
CASPER \
CCD \
CDDL \
CPP \
CROSS_COMPILER \
CRYPT \
CTM \
CUSE \
CXX \
DIALOG \
DICT \
DMAGENT \
DYNAMICROOT \
ED_CRYPTO \
EE \
EFI \
ELFTOOLCHAIN_BOOTSTRAP \
EXAMPLES \
FDT \
FILE \
FINGER \
FLOPPY \
FMTREE \
FORTH \
FP_LIBC \
FREEBSD_UPDATE \
FTP \
GAMES \
GCOV \
GDB \
GNU_DIFF \
GNU_GREP \
GPIO \
HAST \
HTML \
HYPERV \
ICONV \
INET \
INET6 \
INETD \
IPFILTER \
IPFW \
ISCSI \
JAIL \
KDUMP \
KVM \
LDNS \
LDNS_UTILS \
LEGACY_CONSOLE \
LIB32 \
LIBPTHREAD \
LIBTHR \
LLVM_COV \
LOADER_GELI \
LOADER_OFW \
LOADER_UBOOT \
LOCALES \
LOCATE \
LPR \
LS_COLORS \
LZMA_SUPPORT \
MAIL \
MAILWRAPPER \
MAKE \
NDIS \
NETCAT \
NETGRAPH \
NLS_CATALOGS \
NS_CACHING \
NTP \
OPENSSL \
PAM \
PC_SYSINSTALL \
PF \
PKGBOOTSTRAP \
PMC \
PORTSNAP \
PPP \
QUOTAS \
RADIUS_SUPPORT \
RBOOTD \
RESCUE \
ROUTED \
SENDMAIL \
SETUID_LOGIN \
SHAREDOCS \
SOURCELESS \
SOURCELESS_HOST \
SOURCELESS_UCODE \
SVNLITE \
SYSCONS \
SYSTEM_COMPILER \
SYSTEM_LINKER \
TALK \
TCP_WRAPPERS \
TCSH \
TELNET \
TEXTPROC \
TFTP \
TIMED \
UNBOUND \
USB \
UTMPX \
VI \
VT \
WIRELESS \
WPA_SUPPLICANT_EAPOL \
ZFS \
ZONEINFO
__DEFAULT_NO_OPTIONS = \
BSD_GREP \
CLANG_EXTRAS \
DTRACE_TESTS \
GNU_GREP_COMPAT \
HESIOD \
LIBSOFT \
LOADER_FIREWIRE \
LOADER_FORCE_LE \
LOADER_LUA \
NAND \
OFED \
OPENLDAP \
REPRODUCIBLE_BUILD \
RPCBIND_WARMSTART_SUPPORT \
SHARED_TOOLCHAIN \
SORT_THREADS \
SVN \
ZONEINFO_LEAPSECONDS_SUPPORT \
ZONEINFO_OLD_TIMEZONES_SUPPORT \
#
# Default behaviour of some options depends on the architecture. Unfortunately
# this means that we have to test TARGET_ARCH (the buildworld case) as well
# as MACHINE_ARCH (the non-buildworld case). Normally TARGET_ARCH is not
# used at all in bsd.*.mk, but we have to make an exception here if we want
# to allow defaults for some things like clang to vary by target architecture.
# Additional, per-target behavior should be rarely added only after much
# gnashing of teeth and grinding of gears.
#
.if defined(TARGET_ARCH)
__T=${TARGET_ARCH}
.else
__T=${MACHINE_ARCH}
.endif
.if defined(TARGET)
__TT=${TARGET}
.else
__TT=${MACHINE}
.endif
.include <bsd.compiler.mk>
# If the compiler is not C++11 capable, disable Clang and use GCC instead.
# This means that architectures that have GCC 4.2 as default can not
# build Clang without using an external compiler.
.if ${COMPILER_FEATURES:Mc++11} && (${__T} == "aarch64" || \
${__T} == "amd64" || ${__TT} == "arm" || ${__T} == "i386")
# Clang is enabled, and will be installed as the default /usr/bin/cc.
__DEFAULT_YES_OPTIONS+=CLANG CLANG_BOOTSTRAP CLANG_FULL CLANG_IS_CC LLD
__DEFAULT_YES_OPTIONS+=LLVM_TARGET_AARCH64 LLVM_TARGET_ARM LLVM_TARGET_MIPS
__DEFAULT_YES_OPTIONS+=LLVM_TARGET_POWERPC LLVM_TARGET_SPARC LLVM_TARGET_X86
__DEFAULT_NO_OPTIONS+=GCC GCC_BOOTSTRAP GNUCXX GPL_DTC
.elif ${COMPILER_FEATURES:Mc++11} && ${__T:Mriscv*} == "" && ${__T} != "sparc64"
# If an external compiler that supports C++11 is used as ${CC} and Clang
# supports the target, then Clang is enabled but GCC is installed as the
# default /usr/bin/cc.
__DEFAULT_YES_OPTIONS+=CLANG CLANG_FULL GCC GCC_BOOTSTRAP GNUCXX GPL_DTC LLD
__DEFAULT_YES_OPTIONS+=LLVM_TARGET_AARCH64 LLVM_TARGET_ARM LLVM_TARGET_MIPS
__DEFAULT_YES_OPTIONS+=LLVM_TARGET_POWERPC LLVM_TARGET_SPARC LLVM_TARGET_X86
__DEFAULT_NO_OPTIONS+=CLANG_BOOTSTRAP CLANG_IS_CC
.else
# Everything else disables Clang, and uses GCC instead.
__DEFAULT_YES_OPTIONS+=GCC GCC_BOOTSTRAP GNUCXX GPL_DTC
__DEFAULT_NO_OPTIONS+=CLANG CLANG_BOOTSTRAP CLANG_FULL CLANG_IS_CC LLD
__DEFAULT_NO_OPTIONS+=LLVM_TARGET_AARCH64 LLVM_TARGET_ARM LLVM_TARGET_MIPS
__DEFAULT_NO_OPTIONS+=LLVM_TARGET_POWERPC LLVM_TARGET_SPARC LLVM_TARGET_X86
.endif
# In-tree binutils/gcc are older versions without modern architecture support.
.if ${__T} == "aarch64" || ${__T:Mriscv*} != ""
BROKEN_OPTIONS+=BINUTILS BINUTILS_BOOTSTRAP GCC GCC_BOOTSTRAP GDB
.endif
.if ${__T:Mriscv*} != ""
BROKEN_OPTIONS+=PROFILE # "sorry, unimplemented: profiler support for RISC-V"
BROKEN_OPTIONS+=TESTS # "undefined reference to `_Unwind_Resume'"
BROKEN_OPTIONS+=CXX # "libcxxrt.so: undefined reference to `_Unwind_Resume_or_Rethrow'"
.endif
.if ${__T} == "aarch64" || ${__T} == "amd64" || ${__T} == "i386" || \
${__T:Mriscv*} != "" || ${__TT} == "mips"
__DEFAULT_YES_OPTIONS+=LLVM_LIBUNWIND
.else
__DEFAULT_NO_OPTIONS+=LLVM_LIBUNWIND
.endif
.if ${__T} == "aarch64" || ${__T} == "amd64"
__DEFAULT_YES_OPTIONS+=LLD_BOOTSTRAP LLD_IS_LD
.else
__DEFAULT_NO_OPTIONS+=LLD_BOOTSTRAP LLD_IS_LD
.endif
.if ${__T} == "aarch64" || ${__T} == "amd64" || ${__T} == "i386"
__DEFAULT_YES_OPTIONS+=LLDB
.else
__DEFAULT_NO_OPTIONS+=LLDB
.endif
# LLVM lacks support for FreeBSD 64-bit atomic operations for ARMv4/ARMv5
.if ${__T} == "arm" || ${__T} == "armeb"
BROKEN_OPTIONS+=LLDB
.endif
# GDB in base is generally less functional than GDB in ports. Ports GDB
# does not yet contain kernel support for arm, and sparc64 kernel support
# has not been tested.
.if ${__T:Marm*} != "" || ${__T} == "sparc64"
__DEFAULT_NO_OPTIONS+=GDB_LIBEXEC
.else
__DEFAULT_YES_OPTIONS+=GDB_LIBEXEC
.endif
# Only doing soft float API stuff on armv6 and armv7
.if ${__T} != "armv6" && ${__T} != "armv7"
BROKEN_OPTIONS+=LIBSOFT
.endif
.if ${__T:Mmips*}
BROKEN_OPTIONS+=SSP
.endif
# EFI doesn't exist on mips, powerpc, sparc or riscv.
.if ${__T:Mmips*} || ${__T:Mpowerpc*} || ${__T:Msparc64} || ${__T:Mriscv*}
BROKEN_OPTIONS+=EFI
.endif
# GELI isn't supported on !x86
.if ${__T} != "i386" && ${__T} != "amd64"
BROKEN_OPTIONS+=LOADER_GELI
.endif
# OFW is only for powerpc and sparc64, exclude others
.if ${__T:Mpowerpc*} == "" && ${__T:Msparc64} == ""
BROKEN_OPTIONS+=LOADER_OFW
.endif
# UBOOT is only for arm, mips and powerpc, exclude others
.if ${__T:Marm*} == "" && ${__T:Mmips*} == "" && ${__T:Mpowerpc*} == ""
BROKEN_OPTIONS+=LOADER_UBOOT
.endif
.if ${__T:Mmips64*}
# profiling won't work on MIPS64 because there is only assembly for o32
BROKEN_OPTIONS+=PROFILE
.endif
.if ${__T} == "aarch64" || ${__T} == "amd64" || ${__T} == "i386" || \
${__T} == "powerpc64" || ${__T} == "sparc64"
__DEFAULT_YES_OPTIONS+=CXGBETOOL
__DEFAULT_YES_OPTIONS+=MLX5TOOL
.else
__DEFAULT_NO_OPTIONS+=CXGBETOOL
__DEFAULT_NO_OPTIONS+=MLX5TOOL
.endif
# NVME is only x86 and powerpc64
.if ${__T} == "amd64" || ${__T} == "i386" || ${__T} == "powerpc64"
__DEFAULT_YES_OPTIONS+=NVME
.else
__DEFAULT_NO_OPTIONS+=NVME
.endif
.include <bsd.mkopt.mk>
#
# MK_* options that default to "yes" if the compiler is a C++11 compiler.
#
.for var in \
LIBCPLUSPLUS
.if !defined(MK_${var})
.if ${COMPILER_FEATURES:Mc++11}
.if defined(WITHOUT_${var})
MK_${var}:= no
.else
MK_${var}:= yes
.endif
.else
.if defined(WITH_${var})
MK_${var}:= yes
.else
MK_${var}:= no
.endif
.endif
.endif
.endfor
#
# Force some options off if their dependencies are off.
# Order is somewhat important.
#
.if !${COMPILER_FEATURES:Mc++11}
MK_LLVM_LIBUNWIND:= no
.endif
.if ${MK_BINUTILS} == "no"
MK_GDB:= no
.endif
.if ${MK_CAPSICUM} == "no"
MK_CASPER:= no
.endif
.if ${MK_LIBPTHREAD} == "no"
MK_LIBTHR:= no
.endif
.if ${MK_LDNS} == "no"
MK_LDNS_UTILS:= no
MK_UNBOUND:= no
.endif
.if ${MK_SOURCELESS} == "no"
MK_SOURCELESS_HOST:= no
MK_SOURCELESS_UCODE:= no
.endif
.if ${MK_CDDL} == "no"
MK_ZFS:= no
MK_CTF:= no
.endif
.if ${MK_CRYPT} == "no"
MK_OPENSSL:= no
MK_OPENSSH:= no
MK_KERBEROS:= no
.endif
.if ${MK_CXX} == "no"
MK_CLANG:= no
MK_GNUCXX:= no
MK_TESTS:= no
.endif
.if ${MK_DIALOG} == "no"
MK_BSDINSTALL:= no
.endif
.if ${MK_MAIL} == "no"
MK_MAILWRAPPER:= no
MK_SENDMAIL:= no
MK_DMAGENT:= no
.endif
.if ${MK_NETGRAPH} == "no"
MK_ATM:= no
MK_BLUETOOTH:= no
.endif
.if ${MK_NLS} == "no"
MK_NLS_CATALOGS:= no
.endif
.if ${MK_OPENSSL} == "no"
MK_OPENSSH:= no
MK_KERBEROS:= no
.endif
.if ${MK_PF} == "no"
MK_AUTHPF:= no
.endif
.if ${MK_PORTSNAP} == "no"
# freebsd-update depends on phttpget from portsnap
MK_FREEBSD_UPDATE:= no
.endif
.if ${MK_TESTS} == "no"
MK_DTRACE_TESTS:= no
.endif
.if ${MK_ZONEINFO} == "no"
MK_ZONEINFO_LEAPSECONDS_SUPPORT:= no
MK_ZONEINFO_OLD_TIMEZONES_SUPPORT:= no
.endif
.if ${MK_CROSS_COMPILER} == "no"
MK_BINUTILS_BOOTSTRAP:= no
MK_CLANG_BOOTSTRAP:= no
MK_ELFTOOLCHAIN_BOOTSTRAP:= no
MK_GCC_BOOTSTRAP:= no
MK_LLD_BOOTSTRAP:= no
.endif
.if ${MK_TOOLCHAIN} == "no"
MK_BINUTILS:= no
MK_CLANG:= no
MK_GCC:= no
MK_GDB:= no
MK_INCLUDES:= no
MK_LLD:= no
MK_LLDB:= no
.endif
.if ${MK_CLANG} == "no"
MK_CLANG_EXTRAS:= no
MK_CLANG_FULL:= no
MK_LLVM_COV:= no
.endif
#
# MK_* options whose default value depends on another option.
#
.for vv in \
GSSAPI/KERBEROS \
MAN_UTILS/MAN
.if defined(WITH_${vv:H})
MK_${vv:H}:= yes
.elif defined(WITHOUT_${vv:H})
MK_${vv:H}:= no
.else
MK_${vv:H}:= ${MK_${vv:T}}
.endif
.endfor
#
# Set defaults for the MK_*_SUPPORT variables.
#
#
# MK_*_SUPPORT options which default to "yes" unless their corresponding
# MK_* variable is set to "no".
#
.for var in \
BLACKLIST \
BZIP2 \
INET \
INET6 \
KERBEROS \
KVM \
NETGRAPH \
PAM \
TESTS \
WIRELESS
.if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no"
MK_${var}_SUPPORT:= no
.else
MK_${var}_SUPPORT:= yes
.endif
.endfor
.if !${COMPILER_FEATURES:Mc++11}
MK_LLDB:= no
.endif
# gcc 4.8 and newer supports libc++, so suppress gnuc++ in that case.
# while in theory we could build it with that, we don't want to do
# that since it creates too much confusion for too little gain.
# XXX: This is incomplete and needs X_COMPILER_TYPE/VERSION checks too
# to prevent Makefile.inc1 from bootstrapping unneeded dependencies
# and to support 'make delete-old' when supplying an external toolchain.
.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 40800
MK_GNUCXX:=no
MK_GCC:=no
.endif
.endif # !target(__<src.opts.mk>__)
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