[toolchain] introduce a USE_EXTERNAL_LIBC symbol which gets selected by EXTERNAL_TOOL...

Currently we always assume uClibc if an external toolchain is used, this breaks for non-uClibc toolchains or
even vanilla uClibc ones since they do not share the external librpc semantics as OpenWrt. Solve the problem
by defining an abstract "EXTERNAL_LIBC" which packages might or might not depend on.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29689 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/toolchain/Config.in b/toolchain/Config.in
index 75450327fe23f69a266124d8919c22dc8e9e7d8f..c027be821284a66a827dd4adf4b9f14ea9a325a9 100644 (file)
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -175,7 +175,11 @@ config INSIGHT
 
 config USE_UCLIBC
        bool
-       default y if !TOOLCHAINOPTS
+       default y if !TOOLCHAINOPTS && !EXTERNAL_TOOLCHAIN && !NATIVE_TOOLCHAIN
+
+config USE_EXTERNAL_LIBC
+       bool
+       default y if EXTERNAL_TOOLCHAIN || NATIVE_TOOLCHAIN
 
 source "toolchain/gcc/Config.version"