2018-06-23 4:27 GMT+09:00 Dirk Gouders <dirk@xxxxxxxxxxx>:
> Currently, we need to modify existing kconfig targets to generate debugging
> information from the parser. That information then has to be filtered
> somehow, automated tests are at least complicated to implement.
>
> Add a debugconfig target for pure debugging purposes; the initial
> version of this target dumps the menu tree and with the --debug option
> activates the parsers debugging output via it's global variable
> cdebug. The environment variable ZCONF_DEBUG can be used to generate
> even more detailed debugging information.
>
> Sample output for a simple Kconfig file:
>
> $ scripts/kconfig/dconf --debug Kconfig.dconfig
> Kconfig.dconfig:1:config a
> Kconfig.dconfig:2:type(1)
> Kconfig.dconfig:4:endconfig
> Kconfig.dconfig:5:if
> Kconfig.dconfig:5:config b
> Kconfig.dconfig:6:type(1)
> Kconfig.dconfig:7:endconfig
> Kconfig.dconfig:7:endif
>
> config a
> bool
> symbol a
> prompt "a"
>
> config b
> bool
> symbol b
> prompt "b" if a
>
> endmenu
>
> Signed-off-by: Dirk Gouders <dirk@xxxxxxxxxxx>
> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> ---
> scripts/kconfig/Makefile | 10 ++++++++-
> scripts/kconfig/dconf.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 64 insertions(+), 1 deletion(-)
> create mode 100644 scripts/kconfig/dconf.c
>
> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index a3ac2c91331c..19906ff25392 100644
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -4,7 +4,7 @@
> # These targets are used from top-level makefile
>
> PHONY += xconfig gconfig menuconfig config syncconfig \
> - localmodconfig localyesconfig
> + localmodconfig localyesconfig debugconfig
>
> ifdef KBUILD_KCONFIG
> Kconfig := $(KBUILD_KCONFIG)
> @@ -34,6 +34,9 @@ config: $(obj)/conf
> nconfig: $(obj)/nconf
> $< $(silent) $(Kconfig)
>
> +debugconfig: $(obj)/dconf
> + $< $(silent) $(Kconfig)
> +
> # This has become an internal implementation detail and is now deprecated
> # for external use.
> syncconfig: $(obj)/conf
> @@ -149,6 +152,7 @@ help:
> @echo ' xenconfig - Enable additional options for xen dom0 and guest kernel support'
> @echo ' tinyconfig - Configure the tiniest possible kernel'
> @echo ' testconfig - Run Kconfig unit tests (requires python3 and pytest)'
> + @echo ' debugconfig - Debugging tool for developers'
>
> # ===========================================================================
> # Shared Makefile for the various kconfig executables:
> @@ -165,6 +169,10 @@ targets += zconf.lex.c
> HOSTCFLAGS_zconf.lex.o := -I$(src)
> HOSTCFLAGS_zconf.tab.o := -I$(src)
>
> +# dconf: Used for kconfig debugging
> +hostprogs-y += dconf
> +dconf-objs := dconf.o zconf.tab.o
> +
> # nconf: Used for the nconfig target based on ncurses
> hostprogs-y += nconf
> nconf-objs := nconf.o zconf.tab.o nconf.gui.o
> diff --git a/scripts/kconfig/dconf.c b/scripts/kconfig/dconf.c
> new file mode 100644
> index 000000000000..ed1edf607d80
> --- /dev/null
> +++ b/scripts/kconfig/dconf.c
> @@ -0,0 +1,55 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (C) 2018 Dirk Gouders <dirk@xxxxxxxxxxx>
> +
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <getopt.h>
> +
> +#include "lkc.h"
> +
> +extern int cdebug;
> +
> +void usage(const char *progname);
> +void usage(const char *progname)
> +{
> + printf("Usage: %s --help | [--debug] <kconfig-file>\n", progname);
> +}
> +
> +int main(int argc, char *argv[])
> +{
> + int c;
> + int opt_index = 0;
> + char *filename;
> +
> + struct option long_opts[] = {
> + {"debug", no_argument, NULL, 0},
> + {"help", no_argument, NULL, 1},
> + {0, 0, 0, 0}
> + };
> +
> + while (1 ) {
> + c = getopt_long(argc, argv, "", long_opts, &opt_index);
> +
> + if (c == -1)
> + break;
> + if (c == 0) {
> + cdebug = 0x02;
> + }
> + if (c == 1) {
> + usage(argv[0]);
> + exit(EXIT_SUCCESS);
> + }
> + }
> +
> + if (optind == argc) {
> + usage(argv[0]);
> + exit(EXIT_FAILURE);
> + } else
> + filename = argv[optind];
> +
> + conf_parse(filename);
> + zconfdump(stdout);
> +
> + exit(EXIT_SUCCESS);
> +}
> --
> 2.13.6
>
> --
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You mentioned ZCONF_DEBUG in the log.
So, another possibility is to use
an environment variable to turn on debug features.
name = getenv("KCONFIG_DEBUG");
if (name && name[0] == '1')
zconfdump(stdout);
--
Best Regards
Masahiro Yamada
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