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-rw-r--r--Makefile13
1 files changed, 13 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 5b966b752c..25f60e1e54 100644
--- a/Makefile
+++ b/Makefile
@@ -81,11 +81,24 @@ toolchain/%: FORCE
@[ -f .config ] || $(NO_TRACE_MAKE) menuconfig
@$< -D .config Config.in &> /dev/null
+.prereq: $(TOPDIR)/include/prereq.mk .pkginfo
+ @$(NO_TRACE_MAKE) -s -f $(TOPDIR)/include/prereq.mk prereq 2>/dev/null || { \
+ echo "Prerequisite check failed. Use FORCE=1 to override."; \
+ false; \
+ }
+ @touch $@
+
+prereq: .prereq FORCE
+
download: .config FORCE
$(MAKE) toolchain/download
$(MAKE) package/download
$(MAKE) target/download
+ifeq ($(FORCE),)
+world: .prereq
+endif
+
world: .config FORCE
$(MAKE) toolchain/install
$(MAKE) target/compile