tools/: Add initialconfig.c so that perhaps in the future we will be able to use this to generate a new configuration from scratch (rather than having to derive new configurations from existing configurations)

tools/Makefile.host

@@ -1,7 +1,7 @@
 ############################################################################
 # Makefile.host
 #
-#   Copyright (C) 2007, 2008, 2011-2012, 2015 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2007, 2008, 2011-2012, 2015, 2017 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -70,7 +70,7 @@ endif
 all: b16$(HOSTEXEEXT) bdf-converter$(HOSTEXEEXT) cmpconfig$(HOSTEXEEXT) \
     configure$(HOSTEXEEXT) mkconfig$(HOSTEXEEXT) mkdeps$(HOSTEXEEXT) \
     mksymtab$(HOSTEXEEXT)  mksyscall$(HOSTEXEEXT) mkversion$(HOSTEXEEXT) \
-    cnvwindeps$(HOSTEXEEXT) nxstyle$(HOSTEXEEXT)
+    cnvwindeps$(HOSTEXEEXT) nxstyle$(HOSTEXEEXT) initialconfig$(HOSTEXEEXT)
 default: mkconfig$(HOSTEXEEXT) mksyscall$(HOSTEXEEXT) mkdeps$(HOSTEXEEXT) \
     cnvwindeps$(HOSTEXEEXT)
 
@@ -171,6 +171,17 @@ ifdef HOSTEXEEXT
 nxstyle: nxstyle$(HOSTEXEEXT)
 endif
 
+# initialconfig - Create a barebones .config file sufficient only for
+# instantiating the symbolic links necesary to do a real configuration
+# from scratch.
+
+initialconfig$(HOSTEXEEXT): initialconfig.c
+	$(Q) $(HOSTCC) $(HOSTCFLAGS) -o initialconfig$(HOSTEXEEXT) initialconfig.c
+
+ifdef HOSTEXEEXT
+initialconfig: initialconfig$(HOSTEXEEXT)
+endif
+
 # cnvwindeps - Convert dependences generated by a Windows native toolchain
 # for use in a Cygwin/POSIX build environment
 

tools/README.txt

@@ -82,6 +82,15 @@ cmdconfig.c
   This C file can be used to build a utility for comparing two NuttX
   configuration files.
 
+initialconfig.c
+---------------
+
+  This is a C file that can be used create an initial configuration.
+  This permits creating a new configuration from scratch, without
+  relying on any existing board configuration in place.  This utility
+  will create a barebones .config file sufficient only for
+  instantiating the symbolic links necesary to do a real configuration.
+
 kconfig2html.c
 --------------
 

tools/cfgparser.c

@@ -210,7 +210,7 @@ void parse_file(FILE *stream, struct variable_s **list)
 
           parse_line(ptr, &varname, &varval);
 
-          /* If the variable has not value (or the special value 'n'), then
+          /* If the variable has no value (or the special value 'n'), then
            * ignore it.
            */