# $FreeBSD$

# Setup variables for the linker.
#
# LINKER_TYPE is the major type of linker. Currently binutils and lld support
# automatic detection.
#
# LINKER_VERSION is a numeric constant equal to:
#     major * 10000 + minor * 100 + tiny
# It too can be overridden on the command line.
#
# These variables with an X_ prefix will also be provided if XLD is set.
#
# This file may be included multiple times, but only has effect the first time.
#

.if !target(__<bsd.linker.mk>__)
__<bsd.linker.mk>__:

.for ld X_ in LD $${_empty_var_} XLD X_
.if ${ld} == "LD" || !empty(XLD)
.if ${ld} == "LD" || (${ld} == "XLD" && ${XLD} != ${LD})

_ld_version!=	${${ld}} --version 2>/dev/null | head -n 1 || echo none
.if ${_ld_version} == "none"
.error Unable to determine linker type from ${ld}=${${ld}}
.endif
.if ${_ld_version:[1..2]} == "GNU ld"
${X_}LINKER_TYPE=	binutils
_v=	${_ld_version:[3]}
.elif ${_ld_version:[1]} == "LLD"
${X_}LINKER_TYPE=	lld
_v=	${_ld_version:[2]}
.else
.error Unknown linker from ${ld}=${${ld}}: ${_ld_version}
.endif
${X_}LINKER_VERSION!=	echo "${_v:M[1-9].[0-9]*}" | \
			  awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
.undef _ld_version
.undef _v
.endif	# ${ld} == "LD" || (${ld} == "XLD" && ${XLD} != ${LD})

.endif	# ${ld} == "LD" || !empty(XLD)
.endfor	# .for ld in LD XLD


.endif	# !target(__<bsd.linker.mk>__)