freebsd-dev/sys/boot/Makefile.inc
Wojciech Macek 76541eb0a7 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
2017-09-29 06:36:19 +00:00

33 lines
960 B
Makefile

# $FreeBSD$
.include <src.opts.mk>
SSP_CFLAGS=
.if ${MACHINE_CPUARCH} == "arm"
# Do not generate movt/movw, because the relocation fixup for them does not
# translate to the -Bsymbolic -pie format required by self_reloc() in loader(8).
# Also, the fpu is not available in a standalone environment.
.if ${COMPILER_VERSION} < 30800
CFLAGS.clang+= -mllvm -arm-use-movt=0
.else
CFLAGS.clang+= -mno-movt
.endif
CFLAGS.clang+= -mfpu=none
.endif
# The boot loader build uses dd status=none, where possible, for reproducible
# build output (since performance varies from run to run). Trouble is that
# option was recently (10.3) added to FreeBSD and is non-standard. Only use it
# 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