From 01c4f3a763ed9e6cc1ebc3beca76f29b9b6ebfb3 Mon Sep 17 00:00:00 2001
From: Alex Richardson <arichardson@FreeBSD.org>
Date: Thu, 13 Aug 2020 14:14:51 +0000
Subject: [PATCH] Make bsd.linker.mk work with the MacOS linker

This is not strictly required for crossbuilding but having lots of warnings
from bsd.linker.mk in the output was making it hard to see the actual
warning messages.

Reviewed By:	imp
Differential Revision: https://reviews.freebsd.org/D14318
---
 share/mk/bsd.linker.mk | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/share/mk/bsd.linker.mk b/share/mk/bsd.linker.mk
index 5ecd6b8b969c..ae867502c6f2 100644
--- a/share/mk/bsd.linker.mk
+++ b/share/mk/bsd.linker.mk
@@ -58,7 +58,7 @@ ${var}=	${${var}__${${X_}_ld_hash}}
 
 .if ${ld} == "LD" || (${ld} == "XLD" && ${XLD} != ${LD})
 .if !defined(${X_}LINKER_TYPE) || !defined(${X_}LINKER_VERSION)
-_ld_version!=	(${${ld}} --version || echo none) | sed -n 1p
+_ld_version!=	(${${ld}} -v 2>&1 || echo none) | sed -n 1p
 .if ${_ld_version} == "none"
 .warning Unable to determine linker type from ${ld}=${${ld}}
 .endif
@@ -74,6 +74,17 @@ ${X_}LINKER_FREEBSD_VERSION:=	${_ld_version:[4]:C/.*-([^-]*)\)/\1/}
 .else
 ${X_}LINKER_FREEBSD_VERSION=	0
 .endif
+.elif ${_ld_version:[1]} == "@(\#)PROGRAM:ld"
+# bootstrap linker on MacOS
+${X_}LINKER_TYPE=        mac
+_v=        ${_ld_version:[2]:S/PROJECT:ld64-//}
+# Convert version 409.12 to 409.12.0 so that the echo + awk below works
+.if empty(_v:M[1-9]*.[0-9]*.[0-9]*) && !empty(_v:M[1-9]*.[0-9]*)
+_v:=${_v}.0
+.else
+# Some versions do not contain a minor version so we need to append .0.0 there
+_v:=${_v}.0.0
+.endif
 .else
 .warning Unknown linker from ${ld}=${${ld}}: ${_ld_version}, defaulting to bfd
 ${X_}LINKER_TYPE=	bfd