kconfig: introduce kconfig files

The Kconfig files were generated mostly with this script:

  for i in `grep -ho CONFIG_[A-Z0-9_]* default-configs/* | sort -u`; do
    set fnord `git grep -lw $i -- 'hw/*/Makefile.objs' `
    shift
    if test $# = 1; then
      cat >> $(dirname $1)/Kconfig << EOF
config ${i#CONFIG_}
    bool

EOF
      git add $(dirname $1)/Kconfig
    else
      echo $i $*
    fi
  done
  sed -i '$d' hw/*/Kconfig
  for i in hw/*; do
    if test -d $i && ! test -f $i/Kconfig; then
      touch $i/Kconfig
      git add $i/Kconfig
    fi
  done

Whenever a symbol is referenced from multiple subdirectories, the
script prints the list of directories that reference the symbol.
These symbols have to be added manually to the Kconfig files.

Kconfig.host and hw/Kconfig were created manually.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20190123065618.3520-27-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/minikconf.py

@@ -13,6 +13,7 @@
 from __future__ import print_function
 import os
 import sys
+import re
 
 __all__ = [ 'KconfigDataError', 'KconfigParserError',
             'KconfigData', 'KconfigParser' ]
@@ -350,6 +351,12 @@ class KconfigParser:
         self.get_token()
         self.parse_config()
 
+    def do_assignment(self, var, val):
+        if not var.startswith("CONFIG_"):
+            raise Error('assigned variable should start with CONFIG_')
+        var = self.data.do_var(var[7:])
+        self.data.do_assignment(var, val)
+
     # file management -----
 
     def error_path(self):
@@ -645,6 +652,28 @@ class KconfigParser:
         return None
 
 if __name__ == '__main__':
-    fname = len(sys.argv) > 1 and sys.argv[1] or 'Kconfig.test'
-    data = KconfigParser.parse(open(fname, 'r'))
-    print data.compute_config()
+    argv = sys.argv
+    if len(argv) == 1:
+        print ("%s: at least one argument is required" % argv[0], file=sys.stderr)
+        sys.exit(1)
+
+    data = KconfigData()
+    parser = KconfigParser(data)
+    for arg in argv[3:]:
+        m = re.match(r'^(CONFIG_[A-Z0-9_]+)=([yn]?)$', arg)
+        if m is not None:
+            name, value = m.groups()
+            parser.do_assignment(name, value == 'y')
+        else:
+            fp = open(arg, 'r')
+            parser.parse_file(fp)
+            fp.close()
+
+    config = data.compute_config()
+    for key in sorted(config.keys()):
+        print ('CONFIG_%s=%s' % (key, ('y' if config[key] else 'n')))
+
+    deps = open(argv[2], 'w')
+    for fname in data.previously_included:
+        print ('%s: %s' % (argv[1], fname), file=deps)
+    deps.close()