From 41307f2874989048679c83686527a3887ed485b3 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Wed, 29 Apr 2009 08:51:27 +0100
Subject: [legal] Add licence.pl and %.licence make target

It is now possible to run e.g.

  make bin/rtl8139.dsk.licence

in order to see a licensing assessment for any given gPXE build.  The
assessment will either produce a single overall licence for the build
(based on combining all the licences used within the source files for
that build), or will exit with an error stating why a licence
assessment is not possible (for example, if there are files involved
that do not yet contain an explicit FILE_LICENCE() declaration).
---
 src/Makefile.housekeeping | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'src/Makefile.housekeeping')

diff --git a/src/Makefile.housekeeping b/src/Makefile.housekeeping
index 45020179..e886c4b2 100644
--- a/src/Makefile.housekeeping
+++ b/src/Makefile.housekeeping
@@ -672,13 +672,31 @@ $(BIN)/%.deps : $(BIN)/%.tmp
 # Get unneeded source files for the specified target
 #
 define nodeps_list
-	$(sort $(filter-out $(call deps_list,$<),\
+	$(sort $(filter-out $(call deps_list,$(1)),\
 		 $(foreach BOBJ,$(BOBJS),\
 		   $($(basename $(notdir $(BOBJ)))_DEPS))))
 endef
 $(BIN)/%.nodeps : $(BIN)/%.tmp
 	$(Q)$(ECHO) $(call nodeps_list,$<)
 
+# Get licensing verdict for the specified target
+#
+define unlicensed_deps_list
+	$(shell grep -L FILE_LICENCE $(call deps_list,$(1)))
+endef
+define licence_list
+	$(patsubst __licence_%,%,\
+	  $(filter __licence_%,$(shell $(NM) $(1) | cut -d" " -f3)))
+endef
+$(BIN)/%.licence : $(BIN)/%.tmp
+	$(QM)$(ECHO) "  [LICENCE] $@"
+	$(Q)$(if $(strip $(call unlicensed_deps_list,$<)),\
+		echo -n "Unable to determine licence because the following " ;\
+		echo "files are missing a licence declaration:" ;\
+		echo $(call unlicensed_deps_list,$<);\
+		exit 1,\
+		$(LICENCE) $(call licence_list,$<))
+
 # Extract compression information from intermediate object file
 #
 $(BIN)/%.zinfo : $(BIN)/%.tmp
-- 
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