code review 5608059: build: dist-based build for Plan 9

src/cmd/dist/arg.h

 /*
 Derived from Inferno include/kern.h.
 
 http://code.google.com/p/inferno-os/source/browse/include/kern.h
 
         Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
         Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com).  All rights reserved.
         Portions Copyright © 2009 The Go Authors.  All rights reserved.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
@@ skipping 10 matching lines @@
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
 
 /* command line */
 extern char     *argv0;
-#define ARGBEGIN        for((argv0?0:(argv0=(*argv))),argv++,argc--;\
+#define ARGBEGIN        for((argv0=(argv0?argv0:*argv)),argv++,argc--;\
                             argv[0] && argv[0][0]=='-' && argv[0][1];\
                             argc--, argv++) {\
                                 char *_args, *_argt;\
                                 char _argc;\
                                 _args = &argv[0][1];\
                                 if(_args[0]=='-' && _args[1]==0){\
                                         argc--; argv++; break;\
                                 }\
-                                _argc = 0;\
                                 while((_argc = *_args++) != 0)\
                                 switch(_argc)
 #define ARGEND          _argt=0;USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
 #define ARGF()          (_argt=_args, _args="",\
                                 (*_argt? _argt: argv[1]? (argc--, *++argv): 0))
 #define EARGF(x)        (_argt=_args, _args="",\
                                 (*_argt? _argt: argv[1]? (argc--, *++argv): ((x), fatal("usage"), (char*)0)))
 
 #define ARGC()          _argc