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From: Wojciech Macek <wma@FreeBSD.org>
Date: Fri, 29 Sep 2017 06:36:19 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r324099 - in head: share/mk sys/boot
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Author: wma
Date: Fri Sep 29 06:36:19 2017
New Revision: 324099
URL: https://svnweb.freebsd.org/changeset/base/324099

Log:
  Compile loader as Little-Endian on PPC64/POWER8
  
    Add flag to the makefile to allow loader compilation as
    Little-Endian 32-bit executable.
    Usage:
  
    make WITH_LOADER_FORCE_LE=yes -C sys/boot all
  
  Submitted by:          Wojciech Macek <wma@freebsd.org>
  Reviewed by:           imp, nwhitehorn
  Obtained from:         Semihalf
  Sponsored by:          QCM Technologies
  Differential revision: https://reviews.freebsd.org/D12421

Modified:
  head/share/mk/src.opts.mk
  head/sys/boot/Makefile.inc

Modified: head/share/mk/src.opts.mk
==============================================================================
--- head/share/mk/src.opts.mk	Fri Sep 29 06:24:45 2017	(r324098)
+++ head/share/mk/src.opts.mk	Fri Sep 29 06:36:19 2017	(r324099)
@@ -180,6 +180,7 @@ __DEFAULT_NO_OPTIONS = \
     GNU_GREP_COMPAT \
     HESIOD \
     LIBSOFT \
+    LOADER_FORCE_LE \
     NAND \
     OFED \
     OPENLDAP \

Modified: head/sys/boot/Makefile.inc
==============================================================================
--- head/sys/boot/Makefile.inc	Fri Sep 29 06:24:45 2017	(r324098)
+++ head/sys/boot/Makefile.inc	Fri Sep 29 06:36:19 2017	(r324099)
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-.include <bsd.own.mk>
+.include <src.opts.mk>
 
 SSP_CFLAGS=
 
@@ -22,3 +22,11 @@ CFLAGS.clang+=  -mfpu=none
 # when this test succeeds rather than require dd to be a bootstrap tool.
 DD_NOSTATUS!=(dd status=none count=0 2> /dev/null && echo status=none) || true
 DD=dd ${DD_NOSTATUS}
+
+.if ${MK_LOADER_FORCE_LE} != "no"
+
+.if ${MACHINE_ARCH} == "powerpc64"
+CFLAGS+=	-mlittle-endian
+.endif
+
+.endif