[Xen-changelog] [xen-unstable] tools: disable linker --as-needed option.

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1296588211 0
# Node ID 18807b89083dd6ff27f95974a6d7ee1111179b07
# Parent  923e60b7318c41a2a18e3f535b9023c12a0a8968
tools: disable linker --as-needed option.

The Xen build system is not currently compatible with the --as-needed
linker option. The proper fix for this is turning out to be rather
invasive to the build system so simply disable for now with the
intention of revisiting for the 4.2 release.

The --no-as-needed option is available at least since binutils 2.15
(released in May 2004) and hence I think can be unconditionally relied
on.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Reported-by: Nathan March <nathan@xxxxxx>
Tested-by: Nathan March <nathan@xxxxxx>
Committed-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/Rules.mk |    3 +++
 1 files changed, 3 insertions(+)

diff -r 923e60b7318c -r 18807b89083d tools/Rules.mk
--- a/tools/Rules.mk    Tue Feb 01 19:19:58 2011 +0000
+++ b/tools/Rules.mk    Tue Feb 01 19:23:31 2011 +0000
@@ -55,6 +55,9 @@ LDFLAGS += $(shell getconf LFS_LDFLAGS)
 LDFLAGS += $(shell getconf LFS_LDFLAGS)
 endif
 
+# Xen tools build is currently incompatible with ld --as-needed
+LDFLAGS += -Wl,--no-as-needed
+
 # 32-bit x86 does not perform well with -ve segment accesses on Xen.
 CFLAGS-$(CONFIG_X86_32) += $(call cc-option,$(CC),-mno-tls-direct-seg-refs)
 CFLAGS += $(CFLAGS-y)

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