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>
diff --git a/include/configs/balloon3.h b/include/configs/balloon3.h
index 63e6d6e..b604b52 100644
--- a/include/configs/balloon3.h
+++ b/include/configs/balloon3.h
@@ -62,6 +62,7 @@
#include <config_cmd_default.h>
#undef CONFIG_CMD_NET
+#undef CONFIG_CMD_NFS
#undef CONFIG_CMD_ENV
#undef CONFIG_CMD_IMLS
#define CONFIG_CMD_USB
diff --git a/include/configs/palmld.h b/include/configs/palmld.h
index 65f1306..514bcaa 100644
--- a/include/configs/palmld.h
+++ b/include/configs/palmld.h
@@ -63,6 +63,7 @@
#include <config_cmd_default.h>
#undef CONFIG_CMD_NET
+#undef CONFIG_CMD_NFS
#define CONFIG_CMD_ENV
#undef CONFIG_CMD_IMLS
#define CONFIG_CMD_MMC
diff --git a/include/configs/palmtc.h b/include/configs/palmtc.h
index 3f6c2f1..bdb5f57 100644
--- a/include/configs/palmtc.h
+++ b/include/configs/palmtc.h
@@ -67,6 +67,7 @@
#include <config_cmd_default.h>
#undef CONFIG_CMD_NET
+#undef CONFIG_CMD_NFS
#define CONFIG_CMD_ENV
#define CONFIG_CMD_MMC
#define CONFIG_LCD
diff --git a/include/configs/pleb2.h b/include/configs/pleb2.h
index 64654f8..9dbb406 100644
--- a/include/configs/pleb2.h
+++ b/include/configs/pleb2.h
@@ -88,6 +88,7 @@
#include <config_cmd_default.h>
#undef CONFIG_CMD_NET
+#undef CONFIG_CMD_NFS
#define CONFIG_BOOTDELAY 3
diff --git a/include/configs/zipitz2.h b/include/configs/zipitz2.h
index 615d5c1..ade40b5 100644
--- a/include/configs/zipitz2.h
+++ b/include/configs/zipitz2.h
@@ -74,6 +74,7 @@
#include <config_cmd_default.h>
#undef CONFIG_CMD_NET
+#undef CONFIG_CMD_NFS
#define CONFIG_CMD_ENV
#undef CONFIG_CMD_IMLS
#define CONFIG_CMD_MMC