Paul Smith 2611e1991f Introduce a --warn command line option ... Replace the singleton --warn-undefined-variables with infrastructure to manage multiple warnings: the --warn option can take an action "ignore", "warn", or "error" (which will apply to all warnings), or a specific warning type and an action for that type. Multiple options can be provided and are consolidated. * NEWS: Announce the new option. * doc/make.1: Document in the man page. * doc/make.texi (Warnings): Document in the user's manual. * Makefile.am: Add new header warning.h. * src/warning.h: Define enum for actions and warning types, and macros to test whether they are set. Keep the default settings separate so that we can correctly reconstruct MAKEFLAGS. * src/makeint.h: Remove deprecated warn_undefined_variables_flag. * src/main.c: Create global variables to hold warning settings. (switches): Add a new switch for --warn. (initialize_warnings): Set the default warning actions. (main): Call initialize_warnings(). (encode_warning_state, decode_warning_state): Convert warning states between strings and enums. (encode_warning_name, decode_warning_name): Convert warning names between strings and enums. (decode_warn_flags): Convert a --warn option into enum values. If deprecated warn_undefined_variables_flag is set convert it to --warn. (decode_switches): Don't remove duplicates of --warn since order matters. Call decode_warn_flags() to handle --warn. (define_makeflags): Special-case handling of --warn options written to MAKEFLAGS: write out the current settings. * src/read.c (tilde_expand): Use new warning control macros. * src/variable.c (warn_undefined): Ditto. * src/job.c (construct_command_argv): Ditto. * tests/scripts/options/warn: Rename from warn-undefined-variables and add tests for --warn. * tests/scripts/variables/MAKEFLAGS: Expect the new behavior.		2023-04-01 11:13:12 -04:00
..
automatic	[SV 62324] Simplify set_file_variables by passing in the stem	2022-04-24 10:39:32 -04:00
CURDIR
DEFAULT_GOAL
define
EXTRA_PREREQS
flavors	Directly handle $\ line endings	2023-02-26 17:30:15 -05:00
GNUMAKEFLAGS	Don't add GNUMAKEFLAGS to the environment	2022-06-19 14:35:27 -04:00
INCLUDE_DIRS	tests [WINDOWS32]: Support Strawberry Perl on Windows	2022-12-20 02:14:18 -05:00
LIBPATTERNS
MAKE
MAKE_RESTARTS	* tests/scripts/variables/MAKE_RESTARTS: Remove TAB chars	2022-02-27 18:01:13 -05:00
MAKECMDGOALS
MAKEFILES
MAKEFLAGS	Introduce a --warn command line option	2023-04-01 11:13:12 -04:00
MAKELEVEL
MFILE_LIST
negative	Directly handle $\ line endings	2023-02-26 17:30:15 -05:00
private	[SV 61463] Don't export inherited private variables	2023-01-02 23:02:33 -05:00
SHELL	[SV 62654] Support GNU Make on z/OS	2023-01-08 10:45:38 -05:00
special	Convert references from "GNU make" to "GNU Make"	2023-01-01 17:05:12 -05:00
undefine