Make armv6 hard float abi by default. Kill armv6hf.

Allow CPUTYPE=soft to build the current soft-float abi libraries.
Add UPDATING entry to announce this.

Approved by: re@ (gjb)

Author: bsdimp

Makefile

@@ -197,7 +197,7 @@ _MAKE+=	MK_META_MODE=no
 _TARGET_ARCH=	${TARGET:S/pc98/i386/:S/arm64/aarch64/}
 .elif !defined(TARGET) && defined(TARGET_ARCH) && \
     ${TARGET_ARCH} != ${MACHINE_ARCH}
-_TARGET=		${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm/:C/aarch64/arm64/:C/powerpc64/powerpc/:C/riscv64/riscv/}
+_TARGET=		${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/aarch64/arm64/:C/powerpc64/powerpc/:C/riscv64/riscv/}
 .endif
 .if defined(TARGET) && !defined(_TARGET)
 _TARGET=${TARGET}
@@ -374,7 +374,7 @@ worlds:
 .if make(universe) || make(universe_kernels) || make(tinderbox) || make(targets)
 TARGETS?=amd64 arm arm64 i386 mips pc98 powerpc sparc64
 _UNIVERSE_TARGETS=	${TARGETS}
-TARGET_ARCHES_arm?=	arm armeb armv6 armv6hf
+TARGET_ARCHES_arm?=	arm armeb armv6
 TARGET_ARCHES_arm64?=	aarch64
 TARGET_ARCHES_mips?=	mipsel mips mips64el mips64 mipsn32
 TARGET_ARCHES_powerpc?=	powerpc powerpc64

Makefile.inc1

@@ -219,7 +219,6 @@ KNOWN_ARCHES?=	aarch64/arm64 \
 		arm \
 		armeb/arm \
 		armv6/arm \
-		armv6hf/arm \
 		i386 \
 		i386/pc98 \
 		mips \

UPDATING

@@ -31,6 +31,14 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 11.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20160517:
+	The armv6 port now defaults to hard float ABI. Limited support
+	for running both hardfloat and soft float on the same system
+	is available using the libraries installed with -DWITH_LIBSOFT.
+	This has only been tested as an upgrade path for installworld
+	and packages may fail or need manual intervention to run. New
+	packages will be needed.
+
 20160510:
 	Kernel modules compiled outside of a kernel build now default to
 	installing to /boot/modules instead of /boot/kernel.  Many kernel

gnu/usr.bin/binutils/Makefile.inc0

@@ -7,7 +7,7 @@
 VERSION=	"2.17.50 [FreeBSD] 2007-07-03"
 
 .if defined(TARGET_ARCH)
-TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm/:C/powerpc64/powerpc/}
+TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/powerpc64/powerpc/}
 .else
 TARGET_CPUARCH=${MACHINE_CPUARCH}
 .endif

gnu/usr.bin/cc/Makefile.tgt

@@ -4,7 +4,7 @@
 # MACHINE_CPUARCH, but there's no easy way to export make functions...
 
 .if defined(TARGET_ARCH)
-TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm/:C/powerpc64/powerpc/}
+TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/powerpc64/powerpc/}
 .else
 TARGET_CPUARCH=${MACHINE_CPUARCH}
 .endif

gnu/usr.bin/gdb/Makefile.inc

@@ -23,7 +23,7 @@ OBJ_RL= ${OBJ_ROOT}/../lib/libreadline/readline
 # MACHINE_CPUARCH, but there's no easy way to export make functions...
 
 .if defined(TARGET_ARCH)
-TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm/:C/powerpc64/powerpc/}
+TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/powerpc64/powerpc/}
 .else
 TARGET_CPUARCH=${MACHINE_CPUARCH}
 .endif

gnu/usr.bin/gdb/libgdb/Makefile

@@ -4,7 +4,7 @@
 # MACHINE_CPUARCH, but there's no easy way to export make functions...
 
 .if defined(TARGET_ARCH)
-TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm/:C/powerpc64/powerpc/}
+TARGET_CPUARCH=${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/powerpc64/powerpc/}
 .else
 TARGET_CPUARCH=${MACHINE_CPUARCH}
 .endif

lib/clang/clang.build.mk

@@ -21,16 +21,19 @@ CFLAGS+=	-fno-strict-aliasing
 TARGET_ARCH?=	${MACHINE_ARCH}
 BUILD_ARCH?=	${MACHINE_ARCH}
 
-.if ${TARGET_ARCH:Marm*hf*} != ""
+# Armv6 uses hard float abi, unless the CPUTYPE has soft in it.
+# arm (for armv4 and armv5 CPUs) always uses the soft float ABI.
+# For all other targets, we stick with 'unknown'.
+.if ${TARGET_ARCH:Marmv6*} && (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "")
 TARGET_ABI=	gnueabihf
-.elif ${TARGET_ARCH:Marm*} != ""
+.elif ${TARGET_ARCH:Marm*}
 TARGET_ABI=	gnueabi
 .else
 TARGET_ABI=	unknown
 .endif
 
-TARGET_TRIPLE?=	${TARGET_ARCH:C/amd64/x86_64/:C/armv6hf/armv6/:C/arm64/aarch64/}-${TARGET_ABI}-freebsd11.0
-BUILD_TRIPLE?=	${BUILD_ARCH:C/amd64/x86_64/:C/armv6hf/armv6/:C/arm64/aarch64/}-unknown-freebsd11.0
+TARGET_TRIPLE?=	${TARGET_ARCH:C/amd64/x86_64/:C/arm64/aarch64/}-${TARGET_ABI}-freebsd11.0
+BUILD_TRIPLE?=	${BUILD_ARCH:C/amd64/x86_64/:C/arm64/aarch64/}-unknown-freebsd11.0
 CFLAGS+=	-DLLVM_DEFAULT_TARGET_TRIPLE=\"${TARGET_TRIPLE}\" \
 		-DLLVM_HOST_TRIPLE=\"${BUILD_TRIPLE}\" \
 		-DDEFAULT_SYSROOT=\"${TOOLS_PREFIX}\"

lib/libc/Makefile

@@ -105,7 +105,8 @@ NOASM=
 .include "${LIBC_SRCTOP}/rpc/Makefile.inc"
 .include "${LIBC_SRCTOP}/uuid/Makefile.inc"
 .include "${LIBC_SRCTOP}/xdr/Makefile.inc"
-.if (${LIBC_ARCH} == "arm" && ${MACHINE_ARCH} != "armv6hf") ||\
+.if (${LIBC_ARCH} == "arm" && \
+	(${MACHINE_ARCH:Marmv6*} == "" || (defined(CPUTYPE) && ${CPUTYPE:M*soft*}))) || \
      ${LIBC_ARCH} == "mips"
 .include "${LIBC_SRCTOP}/softfloat/Makefile.inc"
 .endif

lib/libc/arm/Makefile.inc

@@ -11,7 +11,7 @@ SYM_MAPS+=${LIBC_SRCTOP}/arm/Symbol.map
 
 .include "${LIBC_SRCTOP}/arm/aeabi/Makefile.inc"
 
-.if ${MACHINE_ARCH:Marm*hf*} != ""
+.if ${MACHINE_ARCH:Marmv6*} && (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "")
 SYM_MAPS+=${LIBC_SRCTOP}/arm/Symbol_vfp.map
 .endif
 

lib/libc/arm/aeabi/Makefile.inc

@@ -5,13 +5,14 @@
 SRCS+=	aeabi_atexit.c		\
 	aeabi_unwind_cpp.c	\
 	aeabi_unwind_exidx.c
-.if ${MACHINE_ARCH:Marm*hf*} == ""
+.if (${MACHINE_ARCH:Marmv6*} && defined(CPUTYPE) && ${CPUTYPE:M*soft*} != "") || \
+	${MACHINE_ARCH:Marmv6*} == ""
 SRCS+=	aeabi_asm_double.S	\
 	aeabi_asm_float.S	\
 	aeabi_double.c		\
 	aeabi_float.c
 .endif
-.if ${MACHINE_ARCH:Marmv6*}
+.if ${MACHINE_ARCH:Marmv6*} && (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "")
 SRCS+=	aeabi_vfp_double.S	\
 	aeabi_vfp_float.S
 .endif

lib/libc/arm/gen/Makefile.inc

@@ -7,7 +7,7 @@ SRCS+=	_ctx_start.S _setjmp.S _set_tp.c alloca.S fabs.c \
 	arm_initfini.c \
 	trivial-getcontextx.c
 
-.if ${MACHINE_ARCH} == "armv6hf"
+.if ${MACHINE_ARCH:Marmv6*} && (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "")
 SRCS+=	fpgetmask_vfp.c fpgetround_vfp.c fpgetsticky_vfp.c fpsetmask_vfp.c \
 	fpsetround_vfp.c fpsetsticky_vfp.c
 .endif

lib/libcompiler_rt/Makefile

@@ -199,9 +199,10 @@ SRCF+=	stdatomic
 .endif
 
 .for file in ${SRCF}
-. if ${MACHINE_ARCH:Marm*hf*} != "" && exists(${CRTSRC}/${CRTARCH}/${file}vfp.S)
+.if ${MACHINE_ARCH:Marmv6*} && (!defined(CPUTYPE) || ${CPUTYPE:M*soft*} == "") && \
+    exists(${CRTSRC}/${CRTARCH}/${file}vfp.S)
 SRCS+= ${file}vfp.S
-. elif !(${MACHINE_CPUARCH} == "arm" && ${MACHINE_ARCH:Marm*hf*} == "") && exists(${CRTSRC}/${CRTARCH}/${file}.S)
+. elif exists(${CRTSRC}/${CRTARCH}/${file}.S)
 SRCS+=	${file}.S
 . else
 SRCS+=	${file}.c

lib/msun/arm/Makefile.inc

@@ -3,7 +3,7 @@
 LDBL_PREC = 53
 SYM_MAPS += ${.CURDIR}/arm/Symbol.map
 
-.if ${TARGET_ARCH} == "armv6"
+.if ${MACHINE_ARCH:Marmv6*} && defined(CPUTYPE) && ${CPUTYPE:M*soft*} != ""
 ARCH_SRCS = fenv-softfp.c fenv-vfp.c
 .endif
 

lib/msun/arm/fenv-vfp.c

@@ -28,6 +28,8 @@
 
 #define	FENV_MANGLE(x)	__vfp_ ##x
 #include "fenv-mangle.h"
-#define	__ARM_PCS_VFP
+#ifndef __ARM_PCS_VFP
+#define	__ARM_PCS_VFP 1
+#endif
 #include "fenv.c"
 

share/mk/bsd.cpu.mk

@@ -309,14 +309,18 @@ MACHINE_CPU += arm
 . if ${MACHINE_ARCH:Marmv6*} != ""
 MACHINE_CPU += armv6
 . endif
-# armv6 is a hybrid. It uses the softfp ABI, but doesn't emulate
+# armv6 is a hybrid. It can use the softfp ABI, but doesn't emulate
 # floating point in the general case, so don't define softfp for
 # it at this time. arm and armeb are pure softfp, so define it
 # for them.
 . if ${MACHINE_ARCH:Marmv6*} == ""
 MACHINE_CPU += softfp
 . endif
-.if ${MACHINE_ARCH} == "armv6"
+# Normally armv6 is hard float ABI from FreeBSD 11 onwards. However
+# when CPUTYPE has 'soft' in it, we use the soft-float ABI to allow
+# building of soft-float ABI libraries. In this case, we have to
+# add the -mfloat-abi=softfp to force that.
+.if ${MACHINE_ARCH:Marmv6*} && defined(CPUTYPE) && ${CPUTYPE:M*soft*} != ""
 # Needs to be CFLAGS not _CPUCFLAGS because it's needed for the ABI
 # not a nice optimization.
 CFLAGS += -mfloat-abi=softfp

share/mk/local.meta.sys.mk

@@ -43,7 +43,7 @@ OBJROOT:= ${OBJROOT:H:tA}/${OBJROOT:T}
 .endif
 
 # from src/Makefile (for universe)
-TARGET_ARCHES_arm?=     arm armeb armv6 armv6hf
+TARGET_ARCHES_arm?=     arm armeb armv6
 TARGET_ARCHES_arm64?=   aarch64
 TARGET_ARCHES_mips?=    mipsel mips mips64el mips64 mipsn32 mipsn32el
 TARGET_ARCHES_powerpc?= powerpc powerpc64

share/mk/sys.mk

@@ -13,7 +13,7 @@ unix		?=	We run FreeBSD, not UNIX.
 # and/or endian.  This is called MACHINE_CPU in NetBSD, but that's used
 # for something different in FreeBSD.
 #
-MACHINE_CPUARCH=${MACHINE_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm/:C/powerpc64/powerpc/:C/riscv64/riscv/}
+MACHINE_CPUARCH=${MACHINE_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/powerpc64/powerpc/:C/riscv64/riscv/}
 .endif