[Buildroot] [PATCH v2 1/2] Makefile: rename cross target -> toolchain

[Fabio Porcedda <fabio.porcedda@gmail.com>]

- Use a more descriptive name, the same of the "toolchain" directory.
- Add missing dependencies to be able to successfully use the target
  right after the configuration.
- Move to a better position.
- Documentation it in the help target.

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
---
 Makefile | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 4b09437..458b8c5 100644
--- a/Makefile
+++ b/Makefile
@@ -377,9 +377,11 @@ $(BUILD_DIR)/buildroot-config/auto.conf: $(CONFIG_DIR)/.config
 
 prepare: $(BUILD_DIR)/buildroot-config/auto.conf
 
+toolchain: prepare dirs dependencies $(BASE_TARGETS)
+
 world: prepare dirs dependencies $(BASE_TARGETS) $(TARGETS_ALL)
 
-.PHONY: all world dirs clean distclean source outputmakefile \
+.PHONY: all world toolchain dirs clean distclean source outputmakefile \
 	legal-info legal-info-prepare legal-info-clean \
 	$(BASE_TARGETS) $(TARGETS) $(TARGETS_ALL) \
 	$(TARGETS_CLEAN) $(TARGETS_DIRCLEAN) $(TARGETS_SOURCE) $(TARGETS_LEGAL_INFO) \
@@ -697,8 +699,6 @@ ifeq ($(O),output)
 endif
 	rm -rf $(CONFIG_DIR)/.config $(CONFIG_DIR)/.config.old $(CONFIG_DIR)/.auto.deps
 
-cross: $(BASE_TARGETS)
-
 help:
 	@echo 'Cleaning:'
 	@echo '  clean                  - delete all files created by build'
@@ -706,6 +706,7 @@ help:
 	@echo
 	@echo 'Build:'
 	@echo '  all                    - make world'
+	@echo '  toolchain              - build toolchain'
 	@echo '  <package>-rebuild      - force recompile <package>'
 	@echo '  <package>-reconfigure  - force reconfigure <package>'
 	@echo
-- 
1.8.0