[Buildroot] [PATCH v2] toolchain-external: allow vendor-controlled defaults

[Mike Frysinger <vapier@gentoo.org>]

Some vendors (like ADI and the Blackfin processor) maintain & ship binary
toolchains that are up-to-date and have been fully tested.  They also use
a standard toolchain prefix.  Since these are (by and large) the packages
that users leverage when compiling Blackfin code, it doesn't make sense
to force them to manually input the toolchain name themselves.  So let ADI
configurations set up reasonable defaults to make people's lives easier.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 toolchain/toolchain-external/Config.in.2 |   11 +++++++++++
 toolchain/toolchain-external/ext-tool.mk |    2 ++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/toolchain/toolchain-external/Config.in.2 b/toolchain/toolchain-external/Config.in.2
index 489558c..50e61e6 100644
--- a/toolchain/toolchain-external/Config.in.2
+++ b/toolchain/toolchain-external/Config.in.2
@@ -1,15 +1,26 @@
 #
 
 if BR2_TOOLCHAIN_EXTERNAL
+
+config BR2_TOOLCHAIN_OVERRIDE_VENDOR
+	bool "Override vendor/device toolchain defaults" if BR2_bfin
+	default y
+	help
+	  Some targets have standard toolchain namings which the
+	  vendor/device maintainer have defined.  If you wish to
+	  override their choices, say Y here.
+
 config BR2_TOOLCHAIN_EXTERNAL_PATH
 	string "External toolchain path"
 	default "/path/to/staging_dir/usr"
+	depends on BR2_TOOLCHAIN_OVERRIDE_VENDOR
 	help
 	  Path to where the external toolchain is installed.
 
 config BR2_TOOLCHAIN_EXTERNAL_PREFIX
 	string "External toolchain prefix"
 	default "$(ARCH)-linux"
+	depends on BR2_TOOLCHAIN_OVERRIDE_VENDOR
 	help
 	  This the the external toolchain prefix. For example:
 	    armeb-unknown-linux-gnu, mipsel-unknown-linux-gnu, etc.
diff --git a/toolchain/toolchain-external/ext-tool.mk b/toolchain/toolchain-external/ext-tool.mk
index 7e4645d..2501256 100644
--- a/toolchain/toolchain-external/ext-tool.mk
+++ b/toolchain/toolchain-external/ext-tool.mk
@@ -37,6 +37,8 @@
 #  cross-compiler binaries remains external, all libraries and headers
 #  are imported into the Buildroot tree.
 
+-include target/device/*/ext-tool.mk
+
 uclibc: dependencies $(STAMP_DIR)/ext-toolchain-installed
 
 LIB_EXTERNAL_LIBS=ld*.so libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libresolv.so librt.so libutil.so
-- 
1.7.3.2