3 $description = "Test the origin function.";
5 $details = "This is a test of the origin function in gnu make.
6 This function will report on where a variable was
7 defined per the following list:
9 'undefined' never defined
10 'default' default definition
11 'environment' environment var without -e
12 'environment override' environment var with -e
13 'file' defined in makefile
14 'command line' defined on the command line
15 'override' defined by override in makefile
16 'automatic' Automatic variable\n";
18 # Set an environment variable
19 $extraENV{MAKETEST} = 1;
23 auto_var = undefined CC MAKETEST MAKE foo CFLAGS WHITE @
24 av = $(foreach var, $(auto_var), $(origin $(var)) )
25 override WHITE := BLACK
27 @echo $(origin undefined)
29 @echo $(origin MAKETEST)
32 @echo $(origin CFLAGS)
37 '-e WHITE=WHITE CFLAGS=',
38 'undefined default environment default file command line override automatic
48 # Reset an environment variable
49 delete $extraENV{MAKETEST};