u-boot/board/xilinx
Sebastien Carlier 6d8962e814 Switch from archive libraries to partial linking
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>
2010-11-17 21:02:18 +01:00
..
common Big white-space cleanup. 2008-05-21 00:14:08 +02:00
microblaze-generic Switch from archive libraries to partial linking 2010-11-17 21:02:18 +01:00
ml507 Makefile: move all Power Architecture boards into boards.cfg 2010-10-18 22:12:04 +02:00
ppc405-generic Switch from archive libraries to partial linking 2010-11-17 21:02:18 +01:00
ppc440-generic Switch from archive libraries to partial linking 2010-11-17 21:02:18 +01:00
xilinx_enet boards: get mac address from environment 2009-03-20 22:39:10 +01:00
xilinx_iic ml300: remove support for broken, orphaned board 2010-03-28 00:18:58 +01:00