[Buildroot] [PATCH v2] toolchain-external: fix gdbserver copying for external arc-2014.12 tools

[Alexey Brodkin]

Historically in pre-built ARC GNU tools gdbserver is located in
top-level "target-bin" folder.

Because of that fact if BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY is
selected Buildroot won't find gdbserver (it looks within
SYSROOT/ARCH_SYSROOT folder).

Simplest solution is to use TOOLCHAIN_EXTERNAL_FIXUP_CMDS where copy
gdbserver from "target-bin" folder into SYSROOT/usr/bin.

Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
Changes in v2:
 [1] "install" command is used instead of "cp"
 [2] copy only "gdbserver" instead of everything from "target_bin" to sysroot
---
 toolchain/toolchain-external/toolchain-external.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/toolchain/toolchain-external/toolchain-external.mk b/toolchain/toolchain-external/toolchain-external.mk
index c0429bb..fe709db 100644
--- a/toolchain/toolchain-external/toolchain-external.mk
+++ b/toolchain/toolchain-external/toolchain-external.mk
@@ -396,6 +396,10 @@ else
 TOOLCHAIN_EXTERNAL_SYNOPSYS_ENDIANESS = be
 endif
 TOOLCHAIN_EXTERNAL_SOURCE = arc_gnu_2014.12_prebuilt_uclibc_$(TOOLCHAIN_EXTERNAL_SYNOPSYS_ENDIANESS)_$(TOOLCHAIN_EXTERNAL_SYNOPSYS_CORE)_linux_install.tar.gz
+define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
+	$(Q)SYSROOT_DIR="$(call toolchain_find_sysroot,$(TOOLCHAIN_EXTERNAL_CC))" ; \
+	install -m 0755 -D $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/target-bin/gdbserver $${SYSROOT_DIR}/usr/bin/gdbserver
+endef
 else
 # Custom toolchain
 TOOLCHAIN_EXTERNAL_SITE = $(dir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
-- 
2.1.0