toolchain/crosstool-NG: add dependencies on host- tools

Depends on:
- GNU awk       --> host-gawk
- GNU automake  --> host-automake

Remove dependency on 'cvs'. cvs is used to retrieve newlib,
which is not supported under Buildroot.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

toolchain/toolchain-crosstool-ng/001-no-cvs.patch

@@ -0,0 +1,15 @@
+Remove dependency on cvs.
+
+cvs is used to retrieve newlib, which is not supported
+under Buildroot, so cvs is not required.
+
+--- crosstool-ng-1.8.0/configure.orig	2010-11-27 15:43:52.000000000 +0000
++++ crosstool-ng-1.8.0/configure	2010-11-27 15:44:10.000000000 +0000
+@@ -359,7 +359,6 @@
+              err="'libtool' 1.5.26 or above was not found"
+ has_or_abort prog=stat
+ has_or_abort prog="aria2c curl wget"
+-has_or_abort prog=cvs
+ has_or_abort prog=patch
+ has_or_abort prog=tar
+ has_or_abort prog=gzip

toolchain/toolchain-crosstool-ng/crosstool-ng.mk

@@ -267,8 +267,16 @@ $(CTNG_DIR)/.patched: $(CTNG_DIR)/.unpacked
 	                              \*.patch.$(ARCH)
 	$(Q)touch $@
 
+# Use order-only dependencies on host-* as they
+# are virtual targets with no rules, and so are
+# considered always remade. But we do not want
+# to reconfigure and rebuild ct-ng every time
+# we need to run it...
+$(CTNG_DIR)/.configured: | host-gawk        \
+                           host-automake
+
 $(CTNG_DIR)/.configured: $(CTNG_DIR)/.patched
-	$(Q)cd $(CTNG_DIR) && ./configure --local
+	$(Q)cd $(CTNG_DIR) && PATH=$(HOST_PATH) ./configure --local
 	$(Q)touch $@
 
 $(CTNG_DIR)/ct-ng: $(CTNG_DIR)/.configured