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From: Ian Lepore <ian@FreeBSD.org>
Date: Thu, 31 Dec 2015 18:29:25 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r292993 - head/lib/libstand
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Author: ian
Date: Thu Dec 31 18:29:24 2015
New Revision: 292993
URL: https://svnweb.freebsd.org/changeset/base/292993

Log:
  When building libstand for arm, don't emit instructions that require
  relocation fixups unsupported by the self_reloc() code, and don't optimize
  memcpy/memset using floating point registers, because in a standalone
  environment nothing has initialized the fpu hardware.

Modified:
  head/lib/libstand/Makefile

Modified: head/lib/libstand/Makefile
==============================================================================
--- head/lib/libstand/Makefile	Thu Dec 31 18:12:35 2015	(r292992)
+++ head/lib/libstand/Makefile	Thu Dec 31 18:29:24 2015	(r292993)
@@ -44,6 +44,12 @@ SRCS+=	bcmp.c bcopy.c bzero.c ffs.c memc
 .if ${MACHINE_CPUARCH} == "arm"
 .PATH: ${LIBC_SRC}/arm/gen
 
+# 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.
+CFLAGS.clang+=	-mllvm -arm-use-movt=0
+CFLAGS.clang+=	-mfpu=none
+
 # Compiler support functions
 .PATH: ${LIBSTAND_SRC}/../../contrib/compiler-rt/lib/builtins/
 # __clzsi2 and ctzsi2 for various builtin functions