branch Attitude Adjustment

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 62 insertions, 0 deletions

diff --git a/include/prereq.mk b/include/prereq.mk
new file mode 100644
index 000000000..4a55c89ff
--- /dev/null
+++ b/include/prereq.mk
@@ -0,0 +1,62 @@
+# 
+# Copyright (C) 2006-2007 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+ifneq ($(__prereq_inc),1)
+__prereq_inc:=1
+
+prereq:
+	if [ -f $(TMP_DIR)/.prereq-error ]; then \
+		echo; \
+		cat $(TMP_DIR)/.prereq-error; \
+		rm -f $(TMP_DIR)/.prereq-error; \
+		echo; \
+		false; \
+	fi
+
+.SILENT: prereq
+endif
+
+define Require
+  export PREREQ_CHECK=1
+  ifeq ($$(CHECK_$(1)),)
+    prereq: prereq-$(1)
+
+    prereq-$(1): FORCE
+		echo -n "Checking '$(1)'... "
+		if $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) >/dev/null 2>/dev/null; then \
+			echo 'ok.'; \
+		else \
+			echo 'failed.'; \
+			echo -e "$(PKG_NAME): $(strip $(2))" | perl -ne 's/\\\s*/\n/g,print' >> $(TMP_DIR)/.prereq-error; \
+		fi
+
+    check-$(1): FORCE
+	  $(call Require/$(1))
+    CHECK_$(1):=1
+
+    .SILENT: prereq-$(1) check-$(1)
+  endif
+endef
+
+
+define RequireCommand
+  define Require/$(1)
+    which $(1)
+  endef
+
+  $$(eval $$(call Require,$(1),$(2)))
+endef
+
+define RequireHeader
+  define Require/$(1)
+    [ -e "$(1)" ]
+  endef
+  
+  $$(eval $$(call Require,$(1),$(2)))
+endef
+
+.NOTPARALLEL: