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15dfad96d7
Don't generate undefined variable warnings for variables that are internal / special to make and where the empty string is valid. Rather than defining them to empty, which could introduce unwanted behavior, keep a list of variable names which we should never warn about. * src/variable.h (warn_undefined): Convert the macro to a function. * src/variable.c (defined_vars): Always "defined" variable names. (warn_undefined): Implement as a function and check against the defined_vars before generating a warning. * src/read.c (read_all_makefiles): No need to reset warning flag. * src/vpath.c (build_vpath_lists): Ditto. * tests/scripts/options/warn-undefined-variables: Expand all the pre-defined variables to ensure warnings are not generated.
39 lines
1.2 KiB
Perl
39 lines
1.2 KiB
Perl
# -*-perl-*-
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$description = "Test the --warn-undefined-variables option.";
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$details = "Verify that warnings are printed for referencing undefined variables.";
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# Verify that make's special variables don't warn even if they're not set
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run_make_test(q!
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vars := $(.VARIABLES) $(MAKECMDGOALS) $(MAKE_RESTARTS) $(CURDIR)
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vars += $(GNUMAKEFLAGS) $(MAKEFLAGS) $(MFLAGS) $(MAKE_COMMAND) $(MAKE)
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vars += $(MAKEFILE_LIST) $(MAKEOVERRIDES) $(-*-command-variables-*-)
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vars += $(.RECIPEPREFIX) $(.LOADED) $(.FEATURES)
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vars += $(SHELL) $(.SHELLFLAGS) $(MAKE_TERMOUT) $(MAKE_TERMERR)
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vars += $(.DEFAULT) $(.DEFAULT_GOAL) $(-*-eval-flags-*-) $(SUFFIXES)
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vars += $(VPATH) $(GPATH)
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all:;
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!,
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'--warn-undefined-variables', "#MAKE#: 'all' is up to date.");
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# Without --warn-undefined-variables, nothing should happen
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run_make_test('
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EMPTY =
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EREF = $(EMPTY)
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UREF = $(UNDEFINED)
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SEREF := $(EREF)
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SUREF := $(UREF)
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all: ; @echo ref $(EREF) $(UREF)',
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'', 'ref');
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# With --warn-undefined-variables, it should warn me
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run_make_test(undef, '--warn-undefined-variables',
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"#MAKEFILE#:7: warning: undefined variable 'UNDEFINED'
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#MAKEFILE#:9: warning: undefined variable 'UNDEFINED'
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ref");
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1;
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