1# $FreeBSD$ 2 3# Setup variables for the linker. 4# 5# LINKER_TYPE is the major type of linker. Currently binutils and lld support 6# automatic detection. 7# 8# LINKER_VERSION is a numeric constant equal to: 9# major * 10000 + minor * 100 + tiny 10# It too can be overridden on the command line. 11# 12# These variables with an X_ prefix will also be provided if XLD is set. 13# 14# This file may be included multiple times, but only has effect the first time. 15# 16 17.if !target(__<bsd.linker.mk>__) 18__<bsd.linker.mk>__: 19 20.for ld X_ in LD $${_empty_var_} XLD X_ 21.if ${ld} == "LD" || !empty(XLD) 22# Try to import LINKER_TYPE and LINKER_VERSION from parent make. 23# The value is only used/exported for the same environment that impacts 24# LD and LINKER_* settings here. 25_exported_vars= ${X_}LINKER_TYPE ${X_}LINKER_VERSION 26${X_}_ld_hash= ${${ld}}${MACHINE}${PATH} 27${X_}_ld_hash:= ${${X_}_ld_hash:hash} 28# Only import if none of the vars are set somehow else. 29_can_export= yes 30.for var in ${_exported_vars} 31.if defined(${var}) 32_can_export= no 33.endif 34.endfor 35.if ${_can_export} == yes 36.for var in ${_exported_vars} 37.if defined(${var}.${${X_}_ld_hash}) 38${var}= ${${var}.${${X_}_ld_hash}} 39.endif 40.endfor 41.endif 42 43.if ${ld} == "LD" || (${ld} == "XLD" && ${XLD} != ${LD}) 44.if !defined(${X_}LINKER_TYPE) || !defined(${X_}LINKER_VERSION) 45_ld_version!= ${${ld}} --version 2>/dev/null | head -n 1 || echo none 46.if ${_ld_version} == "none" 47.error Unable to determine linker type from ${ld}=${${ld}} 48.endif 49.if ${_ld_version:[1..2]} == "GNU ld" 50${X_}LINKER_TYPE= binutils 51_v= ${_ld_version:M[1-9].[0-9]*:[1]} 52.elif ${_ld_version:[1]} == "LLD" 53${X_}LINKER_TYPE= lld 54_v= ${_ld_version:[2]} 55.else 56.error Unknown linker from ${ld}=${${ld}}: ${_ld_version} 57.endif 58${X_}LINKER_VERSION!= echo "${_v:M[1-9].[0-9]*}" | \ 59 awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}' 60.undef _ld_version 61.undef _v 62.endif 63.else 64# Use LD's values 65X_LINKER_TYPE= ${LINKER_TYPE} 66X_LINKER_VERSION= ${LINKER_VERSION} 67.endif # ${ld} == "LD" || (${ld} == "XLD" && ${XLD} != ${LD}) 68 69# Export the values so sub-makes don't have to look them up again, using the 70# hash key computed above. 71.for var in ${_exported_vars} 72${var}.${${X_}_ld_hash}:= ${${var}} 73.export-env ${var}.${${X_}_ld_hash} 74.undef ${var}.${${X_}_ld_hash} 75.endfor 76 77.endif # ${ld} == "LD" || !empty(XLD) 78.endfor # .for ld in LD XLD 79 80 81.endif # !target(__<bsd.linker.mk>__) 82