Move arm from ports to libc.

I've moved the ARM port from ports to the main sysdeps hierarchy.
Beyond the README update, the move of the files was simply

git mv ports/sysdeps/arm sysdeps/arm
git mv ports/sysdeps/unix/arm sysdeps/unix/arm
git mv ports/sysdeps/unix/sysv/linux/arm sysdeps/unix/sysv/linux/arm

and in addition to the ChangeLog entries here, I put a note at the top
of ports/ChangeLog.arm similar to that at the top of
ChangeLog.powerpc.  There is deliberately no NEWS change, as I think
it makes the most sense to put in a general note above all ports
having moved if we can achieve that for 2.20.

Tested that disassembly of installed shared libraries for arm is the
same before and after this patch, except for data (not instructions)
in ld.so (there are assertions in sysdeps/arm/dl-machine.h, and the
path by which that file is found, and so by which it appears in the
assertion message, changes as a result of the move).

	* sysdeps/arm: Move directory from ports/sysdeps/arm.
	* sysdeps/unix/arm: Move directory from ports/sysdeps/unix/arm.
	* sysdeps/unix/sysv/linux/arm: Move directory from
	ports/sysdeps/unix/sysv/linux/arm.
	* README: Update listing for arm-*-linux-gnueabi.

ports/ChangeLog.arm:
	* sysdeps/arm: Move directory to ../sysdeps/arm.
	* sysdeps/unix/arm: Move directory to ../sysdeps.arm.
	* sysdeps/unix/sysv/linux/arm: Move directory to
	../sysdeps/unix/sysv/linux/arm.

1 files changed, 34 insertions, 0 deletions

diff --git a/sysdeps/arm/Makefile b/sysdeps/arm/Makefile
new file mode 100644
index 0000000000..b218e76eac
--- /dev/null
+++ b/sysdeps/arm/Makefile
@@ -0,0 +1,34 @@
+gnulib-arch = $(elfobjdir)/libgcc-stubs.a
+static-gnulib-arch = $(elfobjdir)/libgcc-stubs.a
+
+ifeq ($(subdir),elf)
+sysdep-dl-routines += tlsdesc dl-tlsdesc
+sysdep_routines += aeabi_unwind_cpp_pr1 find_exidx tlsdesc dl-tlsdesc
+sysdep-rtld-routines += aeabi_unwind_cpp_pr1 tlsdesc dl-tlsdesc
+shared-only-routines += aeabi_unwind_cpp_pr1
+
+$(objpfx)libgcc-stubs.a: $(objpfx)aeabi_unwind_cpp_pr1.os
+	$(build-extra-lib)
+
+lib-noranlib: $(objpfx)libgcc-stubs.a
+endif
+
+ifeq ($(subdir),csu)
+# get offset to rtld_global._dl_hwcap
+gen-as-const-headers += rtld-global-offsets.sym tlsdesc.sym
+aeabi_constants = aeabi_lcsts aeabi_sighandlers aeabi_math
+aeabi_routines = aeabi_assert aeabi_localeconv aeabi_errno_addr \
+	aeabi_mb_cur_max aeabi_atexit aeabi_memclr aeabi_memcpy \
+	aeabi_memmove aeabi_memset
+
+sysdep_routines += $(aeabi_constants) $(aeabi_routines)
+static-only-routines += $(aeabi_constants)
+endif
+
+ifeq ($(subdir),gmon)
+sysdep_routines += arm-mcount
+endif
+
+ifeq ($(subdir),debug)
+CFLAGS-backtrace.c += -funwind-tables
+endif