build: allow packages to declare ABI versions to detect necessary package rebuilds

[openwrt.git] / include / package-ipkg.mk

diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index 043431c..cb2a408 100644 (file)
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -83,6 +83,9 @@ ifeq ($(DUMP),)
       ifneq ($(CONFIG_PACKAGE_$(1))$(SDK)$(DEVELOPER),)
         IPKGS += $(1)
         compile: $$(IPKG_$(1)) $(PKG_INFO_DIR)/$(1).provides $(STAGING_DIR_ROOT)/stamp/.$(1)_installed
+        ifneq ($(ABI_VERSION),)
+        compile: $(PKG_INFO_DIR)/$(1).version
+        endif
 
         ifeq ($(CONFIG_PACKAGE_$(1)),y)
           .PHONY: $(PKG_INSTALL_STAMP).$(1)
@@ -124,6 +127,10 @@ ifeq ($(DUMP),)
        rm -rf $(STAGING_DIR_ROOT)/tmp-$(1)
        touch $$@
 
+    $(PKG_INFO_DIR)/$(1).version: $$(IPKG_$(1))
+       echo '$(ABI_VERSION)' | cmp -s - $$@ || \
+               echo '$(ABI_VERSION)' > $$@
+
     $(PKG_INFO_DIR)/$(1).provides: $$(IPKG_$(1))
     $$(IPKG_$(1)): $(STAMP_BUILT) $(INCLUDE_DIR)/package-ipkg.mk
        @rm -rf $(PACKAGE_DIR)/$(1)_* $$(IDIR_$(1))