3 files changed, 20 insertions, 0 deletions
diff --git a/include/package-defaults.mk b/include/package-defaults.mk
index 0505a43..62ccbb9 100644
--- a/include/package-defaults.mk
+++ b/include/package-defaults.mk
@@ -32,6 +32,7 @@ define Package/Default
   else
     VERSION:=$(PKG_RELEASE)
   endif
+  ABI_VERSION:=
   ifneq ($(PKG_FLAGS),)
     PKGFLAGS:=$(PKG_FLAGS)
   else
diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index 043431c..cb2a408 100644
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -83,6 +83,9 @@ ifeq ($(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))
diff --git a/include/package.mk b/include/package.mk
index 79066fe..d14c525 100644
--- a/include/package.mk
+++ b/include/package.mk
@@ -39,6 +39,15 @@ include $(INCLUDE_DIR)/host.mk
 include $(INCLUDE_DIR)/unpack.mk
 include $(INCLUDE_DIR)/depends.mk
 
+find_library_dependencies = $(wildcard $(patsubst %,$(STAGING_DIR)/pkginfo/%.version, \
+	$(filter-out $(BUILD_PACKAGES),$(foreach dep, \
+		$(filter-out @%, $(patsubst +%,%,$(1))), \
+		$(if $(findstring :,$(dep)), \
+			$(word 2,$(subst :,$(space),$(dep))), \
+			$(dep) \
+		) \
+	))))
+
 STAMP_NO_AUTOREBUILD=$(wildcard $(PKG_BUILD_DIR)/.no_autorebuild)
 PREV_STAMP_PREPARED:=$(if $(STAMP_NO_AUTOREBUILD),$(wildcard $(PKG_BUILD_DIR)/.prepared*))
 ifneq ($(PREV_STAMP_PREPARED),)
@@ -227,6 +236,9 @@ define Package/$(1)/description
 endef
 endif
 
+  BUILD_PACKAGES += $(1)
+  $(STAMP_PREPARED): $$(if $(QUILT)$(DUMP),,$(call find_library_dependencies,$(DEPENDS)))
+
   $(foreach FIELD, TITLE CATEGORY SECTION VERSION,
     ifeq ($($(FIELD)),)
       $$(error Package/$(1) is missing the $(FIELD) field)