[source] build: clean up redundant touching of the package install info file

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/1f22957247caa85b9583ebb4edaee618dff4b3ba

commit 1f22957247caa85b9583ebb4edaee618dff4b3ba
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Tue Feb 21 18:27:22 2017 +0100

    build: clean up redundant touching of the package install info file
    
    Instead of using a separate .clean stamp file, remove the install info
    file on compile, then append the install package list afterwards
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 include/package-ipkg.mk | 12 ++++--------
 include/package.mk      |  4 ++--
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index 2b3ff14..620be99 100644
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -107,22 +107,18 @@ ifeq ($(DUMP),)
       ifneq ($(CONFIG_PACKAGE_$(1))$(DEVELOPER),)
         IPKGS += $(1)
         $(_pkg_target)compile: $$(IPKG_$(1)) $(PKG_INFO_DIR)/$(1).provides $(PKG_BUILD_DIR)/.pkgdir/$(1).installed
+        prepare-package-install: $$(IPKG_$(1))
         compile: $(STAGING_DIR_ROOT)/stamp/.$(1)_installed
       else
         $(if $(CONFIG_PACKAGE_$(1)),$$(info WARNING: skipping $(1) -- package not selected))
       endif
 
       .PHONY: $(PKG_INSTALL_STAMP).$(1)
-      compile: $(PKG_INSTALL_STAMP).$(1)
-      $(PKG_INSTALL_STAMP).$(1):
-			if [ -f $(PKG_INSTALL_STAMP).clean ]; then \
-				rm -f \
-					$(PKG_INSTALL_STAMP) \
-					$(PKG_INSTALL_STAMP).clean; \
-			fi
       ifeq ($(CONFIG_PACKAGE_$(1)),y)
-			echo "$(1)" >> $(PKG_INSTALL_STAMP)
+        compile: $(PKG_INSTALL_STAMP).$(1)
       endif
+      $(PKG_INSTALL_STAMP).$(1): prepare-package-install
+		echo "$(1)" >> $(PKG_INSTALL_STAMP)
     endif
     endif
 
diff --git a/include/package.mk b/include/package.mk
index a3ef302..bf308bb 100644
--- a/include/package.mk
+++ b/include/package.mk
@@ -293,13 +293,13 @@ Build/DistCheck=$(call Build/DistCheck/Default,)
 .PHONY: prepare-package-install
 prepare-package-install:
 	@mkdir -p $(PKG_INFO_DIR)
-	@touch $(PKG_INSTALL_STAMP).clean
+	@rm -f $(PKG_INSTALL_STAMP)
 	@echo "$(filter-out essential nonshared,$(PKG_FLAGS))" > $(PKG_INSTALL_STAMP).flags
 
 $(PACKAGE_DIR):
 	mkdir -p $@
 
-compile: prepare-package-install
+compile:
 .install: .compile
 install: compile