toolchain: force a full rebuild on buildbot if the toolchain changed

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/toolchain/Makefile b/toolchain/Makefile
index 6ee881155e8067a5cbbef976a7a34a6db5bdfd0e..34abda2376487a48d3dc06f847586799c96d60d1 100644 (file)
--- a/toolchain/Makefile
+++ b/toolchain/Makefile
@@ -69,6 +69,18 @@ ifneq ($(ARCH),)
 endif
 endif
 
+ifdef CONFIG_BUILDBOT
+  $(STAGING_DIR)/.toolchain_ver_check: $(TMP_DIR)/.build
+       cd "$(TOPDIR)"; git log --format=%h -1 > $(TMP_DIR)/.toolchain_ver_check
+       cmp -s $(TMP_DIR)/.toolchain_ver_check $@ || \
+               rm -rf $(BUILD_DIR) $(STAGING_DIR) $(TOOLCHAIN_DIR) $(BUILD_DIR_TOOLCHAIN)
+       mkdir -p $(STAGING_DIR)
+       mv $(TMP_DIR)/.toolchain_ver_check $@
+
+$(STAGING_DIR)/.prepared: $(STAGING_DIR)/.toolchain_ver_check
+$(TOOLCHAIN_DIR)/stamp/.gcc-initial_installed: $(STAGING_DIR)/.prepared
+endif
+
 # prerequisites for the individual targets
 $(curdir)/ := .config prereq
 $(curdir)//compile = $(STAGING_DIR)/.prepared $(TOOLCHAIN_DIR)/info.mk $(tools/stamp-compile)