This reverts commit 3e16abe0e468c568b30acb7d8583e3dbed6f177b.

The logic of this patch is broken - testing for CONFIG_SYS_POST_FPU in
the Makefile cannot work, as this is only a bit that may (or may not)
be set in the CONFIG_POST variable.

The patch cases build errors on a number of boards, so we revert it.

Signed-off-by: Wolfgang Denk <wd@denx.de>

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils.  As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".

This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.

The name of each former library archive is preserved except for
extensions which change from ".a" to ".o".  This commit updates
references accordingly where needed, in particular in some linker
scripts.

This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols.  Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.

Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>

- Revives POST for blackfin arch;
- Removes redundant code:
     arch/blackfin/lib/post.c
     arch/powerpc/cpu/ppc4xx/commproc.c
     arch/powerpc/cpu/mpc512x/common.c
- fixes up the post_word_{load|store} usage.

Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com>
Acked-by: Detlev Zundel <dzu@denx.de>
Tested-by: Anatolij Gustschin <agust@denx.de>

List of the maintainers of the affected by patch boards:
Cc: Stephan Linz <linz@li-pro.net>
Cc: Denis Peter <d.peter@mpl.ch>
Cc: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Niklaus Giger <niklaus.giger@netstal.com>
Cc: Larry Johnson <lrj@acm.org>
Cc: Feng Kan <fkan@amcc.com>

Parallel builds (using "make -jN") would occasionally fail with error
messages like
	ppc_4xxFP-objdump: string.o: File format not recognized
or
	post/libpost.a(cpu.o): In function `cpu_post_test':
	/home/wd/git/u-boot/work/post/lib_ppc/cpu.c:130: undefined reference to `cpu_post_test_string'
or similar. We now make sure to run the 'postdeps" step before
attempting to build the specific POST libraries.

Signed-off-by: Wolfgang Denk <wd@denx.de>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

ARFLAGS was not set, which caused "ppc_8xx-ar: creating libgenpost.a"
messages to be printed.

Signed-off-by: Wolfgang Denk <wd@denx.de>

Introduce the new logical option CONFIG_HAS_POST which is set when the
platform has CONFIG_POST set. Use CONFIG_HAS_POST in the post/ Makefiles
to determine should the POST libs be compiled for the selected target
platform, or not.

To avoid breaking u-boot linking process, the empty post/libpost.a file is
created for platforms which do not have POSTs.

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>