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Subject[PATCH] Revert "perf tools: Allow to specify custom linker command"
Date
This reverts commit 5ef7bbb09f7b
("perf tools: Allow to specify custom linker command").

LD is a pre-defined variable in GNU Make. I.e. it is always defined.
Which means there's no point to check "LD ?= ..." because it will never
succeed. And so LD will be either that explicitly passed to make like
this:
------->8-------
make LD=path_to_my_ld ...
------->8-------
or default value, which is host's "ld".

Latter leads to failure of cross-linkage because instead of cross linker
"$(CROSS_COMPILE)ld" host's "ld" is used.

As for commit which is reverted here:
[1] Usually for selection of non-default flavour of CPU core/options
linker flags are used like "-mtune=xxx" or "-mMyCPUType" etc.

[2] Still to implement ability to use "ld" that differs from
"$(CROSS_COMPILE)ld" one will need to add new makefile variable like
TARGET_LD and then check if $(TARGET_LD) is not specified on make
invocation then use "$(CROSS_COMPILE)ld".

But for now to fix cross-building of perf this revert is enough.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: linux-kernel@vger.kernel.org
---
tools/perf/Makefile.perf | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 7a4b549..0e0938a 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -110,7 +110,7 @@ $(OUTPUT)PERF-VERSION-FILE: ../../.git/HEAD
$(Q)touch $(OUTPUT)PERF-VERSION-FILE

CC = $(CROSS_COMPILE)gcc
-LD ?= $(CROSS_COMPILE)ld
+LD = $(CROSS_COMPILE)ld
AR = $(CROSS_COMPILE)ar
PKG_CONFIG = $(CROSS_COMPILE)pkg-config

--
2.4.3


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