Author: emaste
Date: Thu Apr 16 22:35:19 2015
New Revision: 281629
URL: https://svnweb.freebsd.org/changeset/base/281629

Log:
  Add arm64 to universe if binutils is available.
  
  arm64 relies on an external binutils port or package right now, because
  the in-tree linker from binutils 2.17.50 does not support arm64. Add
  arm64 to universe if the linker is available. If not output a message
  that arm64 is skipped.
  
  buildworld and buildkernel use the external binutils automatically, so
  it's sufficient to run 'pkg install aarch64-binutils' to build
  FreeBSD/arm64.
  
  Differential Revision:        https://reviews.freebsd.org/D2302
  Reviewed by:  andrew, imp
  Sponsored by: The FreeBSD Foundation

Modified:
  head/Makefile

Modified: head/Makefile
==============================================================================
--- head/Makefile       Thu Apr 16 22:35:15 2015        (r281628)
+++ head/Makefile       Thu Apr 16 22:35:19 2015        (r281629)
@@ -374,6 +374,17 @@ kernel-toolchains:
 #
 .if make(universe) || make(universe_kernels) || make(tinderbox) || 
make(targets)
 TARGETS?=amd64 arm i386 mips pc98 powerpc sparc64
+# XXX Add arm64 to universe only if we have an external binutils installed.
+# It does not build with the in-tree linnker.
+.if exists(/usr/local/aarch64-freebsd/bin/ld)
+TARGETS+=arm64
+TARGET_ARCHES_arm64?=  aarch64
+.else
+universe: universe_arm64_skip
+universe_epilogue: universe_arm64_skip
+universe_arm64_skip: universe_prologue
+       @echo ">> arm64 skipped - install aarch64-binutils port or package to 
build"
+.endif
 TARGET_ARCHES_arm?=    arm armeb armv6 armv6hf
 TARGET_ARCHES_mips?=   mipsel mips mips64el mips64 mipsn32
 TARGET_ARCHES_powerpc?=        powerpc powerpc64
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