1 files changed, 54 insertions, 0 deletions
diff --git a/src/kmk/tests/scripts/functions/origin b/src/kmk/tests/scripts/functions/origin
new file mode 100644
index 0000000..7a6a9fa
--- /dev/null
+++ b/src/kmk/tests/scripts/functions/origin
@@ -0,0 +1,54 @@
+#                                                                    -*-perl-*-
+
+$description = "Test the origin function.";
+
+$details = "This is a test of the origin function in gnu make.
+This function will report on where a variable was
+defined per the following list:
+
+'undefined'            never defined
+'default'              default definition
+'environment'          environment var without -e
+'environment override' environment var with    -e
+'file'                 defined in makefile
+'command line'         defined on the command line
+'override'             defined by override in makefile
+'automatic'            Automatic variable\n";
+
+# kmk: CC isn't a default.
+$CC_origin = $is_kmk ? "undefined" : "default";
+
+# Set an environment variable
+$extraENV{MAKETEST} = 1;
+
+run_make_test('
+foo := bletch garf
+auto_var = undefined CC MAKETEST MAKE foo CFLAGS WHITE @
+av = $(foreach var, $(auto_var), $(origin $(var)) )
+override WHITE := BLACK
+all: auto
+	@echo $(origin undefined)
+	@echo $(origin CC)
+	@echo $(origin MAKETEST)
+	@echo $(origin MAKE)
+	@echo $(origin foo)
+	@echo $(origin CFLAGS)
+	@echo $(origin WHITE)
+	@echo $(origin @)
+auto :
+	@echo $(av)',
+	      '-e WHITE=WHITE CFLAGS=',
+	      'undefined '. $CC_origin .' environment default file command line override automatic
+undefined
+'. $CC_origin .'
+environment
+default
+file
+command line
+override
+automatic');
+
+# Reset an environment variable
+delete $extraENV{MAKETEST};
+
+1;