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>
The environment is the canonical storage location of the mac address, so
we're killing off the global data location and moving everything to
querying the env directly.
The cpus that get converted here:
at91rm9200
mpc512x
mpc5xxx
mpc8260
mpc8xx
ppc4xx
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
CC: Ben Warren <biggerbadderben@gmail.com>
CC: John Rigby <jrigby@freescale.com>
CC: Stefan Roese <sr@denx.de>
Mike Frysinger
Sebastien Carlier
Wolfgang Denk
Jean-Christophe PLAGNIOL-VILLARD
Yuri Tikhonov
Sergei Poselenov
Wolfgang Denk