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Be a little conservative about when to force size optimizations.

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Reports have come in that there's issue with powerpc and sparc64 since
we've switched to using -Oz / -Os. We don't strictly need them for
!x86, so be conservative about when we enable them.

Approved by: re@ (gjb)
Differential Revision: https://reviews.freebsd.org/D17016
This commit is contained in:
Warner Losh 2018-09-05 20:02:23 +00:00
parent 4269bba2eb
commit 0125fb6352
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=338474
1 changed files with 2 additions and 0 deletions
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stand/defs.mk
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@ -53,12 +53,14 @@ CFLAGS+= -I${SASRC} -D_STANDALONE
CFLAGS+= -I${SYSDIR}
# Spike the floating point interfaces
CFLAGS+= -Ddouble=jagged-little-pill -Dfloat=floaty-mcfloatface
.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64"
# Slim down the image. This saves about 15% in size with clang 6 on x86
# Our most constrained /boot/loader env is BIOS booting on x86, where
# our text + data + BTX have to fit into 640k below the ISA hole.
# Experience has shown that problems arise between ~520k to ~530k.
CFLAGS.clang+= -Oz
CFLAGS.gcc+= -Os
.endif
# GELI Support, with backward compat hooks (mostly)
.if defined(LOADER_NO_GELI_SUPPORT)