1125902b6SBryan Drewery# $FreeBSD$ 2125902b6SBryan Drewery 3125902b6SBryan Drewery# Setup variables for the linker. 4125902b6SBryan Drewery# 5125902b6SBryan Drewery# LINKER_TYPE is the major type of linker. Currently binutils and lld support 6125902b6SBryan Drewery# automatic detection. 7125902b6SBryan Drewery# 8125902b6SBryan Drewery# LINKER_VERSION is a numeric constant equal to: 9125902b6SBryan Drewery# major * 10000 + minor * 100 + tiny 10125902b6SBryan Drewery# It too can be overridden on the command line. 11125902b6SBryan Drewery# 12*cdd89b98SEd Maste# LINKER_FEATURES may contain one or more of the following, based on 13*cdd89b98SEd Maste# linker support for that feature: 14*cdd89b98SEd Maste# 15*cdd89b98SEd Maste# - build-id : support for generating a Build-ID note 16*cdd89b98SEd Maste# 1708154765SBryan Drewery# These variables with an X_ prefix will also be provided if XLD is set. 1808154765SBryan Drewery# 19125902b6SBryan Drewery# This file may be included multiple times, but only has effect the first time. 20125902b6SBryan Drewery# 21125902b6SBryan Drewery 22125902b6SBryan Drewery.if !target(__<bsd.linker.mk>__) 23125902b6SBryan Drewery__<bsd.linker.mk>__: 24125902b6SBryan Drewery 2508154765SBryan Drewery.for ld X_ in LD $${_empty_var_} XLD X_ 2608154765SBryan Drewery.if ${ld} == "LD" || !empty(XLD) 2719fad655SBryan Drewery# Try to import LINKER_TYPE and LINKER_VERSION from parent make. 2819fad655SBryan Drewery# The value is only used/exported for the same environment that impacts 2919fad655SBryan Drewery# LD and LINKER_* settings here. 30*cdd89b98SEd Maste_exported_vars= ${X_}LINKER_TYPE ${X_}LINKER_VERSION ${X_}LINKER_FEATURES 3119fad655SBryan Drewery${X_}_ld_hash= ${${ld}}${MACHINE}${PATH} 3219fad655SBryan Drewery${X_}_ld_hash:= ${${X_}_ld_hash:hash} 3319fad655SBryan Drewery# Only import if none of the vars are set somehow else. 3419fad655SBryan Drewery_can_export= yes 3519fad655SBryan Drewery.for var in ${_exported_vars} 3619fad655SBryan Drewery.if defined(${var}) 3719fad655SBryan Drewery_can_export= no 3819fad655SBryan Drewery.endif 3919fad655SBryan Drewery.endfor 4019fad655SBryan Drewery.if ${_can_export} == yes 4119fad655SBryan Drewery.for var in ${_exported_vars} 4219fad655SBryan Drewery.if defined(${var}.${${X_}_ld_hash}) 4319fad655SBryan Drewery${var}= ${${var}.${${X_}_ld_hash}} 4419fad655SBryan Drewery.endif 4519fad655SBryan Drewery.endfor 4619fad655SBryan Drewery.endif 4719fad655SBryan Drewery 4808154765SBryan Drewery.if ${ld} == "LD" || (${ld} == "XLD" && ${XLD} != ${LD}) 49ec39013eSBryan Drewery.if !defined(${X_}LINKER_TYPE) || !defined(${X_}LINKER_VERSION) 5008154765SBryan Drewery_ld_version!= ${${ld}} --version 2>/dev/null | head -n 1 || echo none 51125902b6SBryan Drewery.if ${_ld_version} == "none" 5208154765SBryan Drewery.error Unable to determine linker type from ${ld}=${${ld}} 53125902b6SBryan Drewery.endif 54125902b6SBryan Drewery.if ${_ld_version:[1..2]} == "GNU ld" 5583cff1f8SEd Maste${X_}LINKER_TYPE= bfd 5689bf31fdSBryan Drewery_v= ${_ld_version:M[1-9].[0-9]*:[1]} 57125902b6SBryan Drewery.elif ${_ld_version:[1]} == "LLD" 5808154765SBryan Drewery${X_}LINKER_TYPE= lld 59125902b6SBryan Drewery_v= ${_ld_version:[2]} 60125902b6SBryan Drewery.else 6108154765SBryan Drewery.error Unknown linker from ${ld}=${${ld}}: ${_ld_version} 62125902b6SBryan Drewery.endif 6308154765SBryan Drewery${X_}LINKER_VERSION!= echo "${_v:M[1-9].[0-9]*}" | \ 6408154765SBryan Drewery awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}' 6508154765SBryan Drewery.undef _ld_version 6608154765SBryan Drewery.undef _v 67*cdd89b98SEd Maste${X_}LINKER_FEATURES= 68*cdd89b98SEd Maste.if ${${X_}LINKER_TYPE} != "bfd" || ${${X_}LINKER_VERSION} > 21750 69*cdd89b98SEd Maste${X_}LINKER_FEATURES+= build-id 70*cdd89b98SEd Maste.endif 71ec39013eSBryan Drewery.endif 726f81bd02SBryan Drewery.else 736f81bd02SBryan Drewery# Use LD's values 746f81bd02SBryan DreweryX_LINKER_TYPE= ${LINKER_TYPE} 756f81bd02SBryan DreweryX_LINKER_VERSION= ${LINKER_VERSION} 76*cdd89b98SEd MasteX_LINKER_FEATURES= ${LINKER_FEATURES} 7708154765SBryan Drewery.endif # ${ld} == "LD" || (${ld} == "XLD" && ${XLD} != ${LD}) 7808154765SBryan Drewery 7919fad655SBryan Drewery# Export the values so sub-makes don't have to look them up again, using the 8019fad655SBryan Drewery# hash key computed above. 8119fad655SBryan Drewery.for var in ${_exported_vars} 8219fad655SBryan Drewery${var}.${${X_}_ld_hash}:= ${${var}} 8319fad655SBryan Drewery.export-env ${var}.${${X_}_ld_hash} 8419fad655SBryan Drewery.undef ${var}.${${X_}_ld_hash} 8519fad655SBryan Drewery.endfor 8619fad655SBryan Drewery 8708154765SBryan Drewery.endif # ${ld} == "LD" || !empty(XLD) 8808154765SBryan Drewery.endfor # .for ld in LD XLD 8908154765SBryan Drewery 90125902b6SBryan Drewery 91125902b6SBryan Drewery.endif # !target(__<bsd.linker.mk>__) 92