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
--
To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
