add support for a common shell include file, which is evaluated for every make shell call, simplify variable passing to the shell with shvar and shexport templates, use Package/<pkgname>/config for adding config.in data

git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@5014 3c298f89-4303-0410-b956-a3cf2f4a3e73

include/package.mk

@@ -12,6 +12,15 @@ endif
 
 include $(INCLUDE_DIR)/prereq.mk
 
+define shvar
+V_$(subst .,_,$(subst -,_,$(subst /,_,$(1))))
+endef
+
+define shexport
+$(call shvar,$(1))=$$(call $(1))
+export $(call shvar,$(1))
+endef
+
 define Build/DefaultTargets
   ifeq ($(DUMP),)
     ifeq ($(CONFIG_AUTOREBUILD),y)
@@ -98,9 +107,8 @@ define BuildDescription
 endef
 
 define BuildIPKGVariable
-  pkg_$(subst .,_,$(subst -,_,$(1)))_$(2) = $$(Package/$(1)/$(2))
-  export pkg_$(subst .,_,$(subst -,_,$(1))_$(2))
-  $(1)_COMMANDS += if [ -n "$$$$$$$$pkg_$(subst .,_,$(subst -,_,$(1)))_$(2)" ]; then echo "$$$$$$$$pkg_$(subst .,_,$(subst -,_,$(1)))_$(2)" > $(2); fi;
+  $(call shexport,Package/$(1)/$(2))
+  $(1)_COMMANDS += var2file "$(call shvar,Package/$(1)/$(2))" $(2);
 endef
 
 define BuildPackage
@@ -168,7 +176,7 @@ define BuildPackage
 	echo "Build-Depends: $(PKG_BUILDDEP)"; \
 	echo "Category: $(CATEGORY)"; \
 	echo "Title: $(TITLE)"; \
-	echo "Description: $(DESCRIPTION)" | sed -e 's,\\,\n,g';
+	echo "Description: $(DESCRIPTION)" | sed -e 's,\\,\n,g'; \
 	
     ifneq ($(URL),)
       DUMPINFO += \
@@ -179,11 +187,11 @@ define BuildPackage
 	DUMPINFO += \
 		echo "@@";
 
-    ifneq ($(CONFIG),)
+	$(call shexport,Package/$(1)/config)
 	DUMPINFO += \
-	echo "Config: $(CONFIG)" | sed -e 's,\\,\n,g'; \
+		if isset $(call shvar,Package/$(1)/config); then echo "Config: "; getvar $(call shvar,Package/$(1)/config); fi; \
 		echo "@@";
-    endif
+  
   endif
 
   $(eval $(call BuildIPKGVariable,$(1),conffiles))

include/shell.sh

@@ -0,0 +1,15 @@
+getvar() {
+	eval "echo \"\${$1}\""
+}
+
+var2file() {
+	local var
+	eval "var=\"\${$1}\""
+	if [ -n "$var" ]; then echo "$var" > "$2"; fi
+}
+
+isset() {
+	local var
+	eval "var=\"\${$1}\""
+	[ -n "$var" ]
+}

package/busybox/Makefile

@@ -31,10 +31,12 @@ define Package/busybox
 	It slices, it dices, it makes Julian Fries.
   URL:=http://busybox.net/
   MENU:=1
-  CONFIG:=\\\
-	menu "Configuration" \\\
-		depends on PACKAGE_busybox \\\
-		source "$(SOURCE)/config/Config.in" \\\
+endef
+
+define Package/busybox/config
+	menu "Configuration"
+		depends on PACKAGE_busybox
+		source "$(SOURCE)/config/Config.in"
 	endmenu
 endef
 

rules.mk

@@ -8,8 +8,7 @@
 -include $(TOPDIR)/.config
 include $(TOPDIR)/include/verbose.mk
 
-export SHELL=/bin/bash
-
+export SHELL=/usr/bin/env bash -c '. $(TOPDIR)/include/shell.sh; eval "$$2"'  --
 ARCH:=$(strip $(subst ",, $(CONFIG_ARCH)))
 TARGET_OPTIMIZATION:=$(strip $(subst ",, $(CONFIG_TARGET_OPTIMIZATION)))
 WGET:=$(strip $(subst ",, $(CONFIG_WGET)))