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ref: 0b8e3ffbbafd1b91ae6f048ed3565743edcc1825
parent: ec6edc7e8292a1717615c30cf7fba72a5e9c7b4b
author: cinap_lenrek <cinap_lenrek@gmx.de>
date: Wed Oct 3 14:09:53 EDT 2012

apply sources patch cc-cpp-c99-comm

When running "?c -p ...", ensure the backend cpp recognizes C++ comments.

2c(1) states that the compilers recognize // comments, and the bare compilers
do.  But if you invoke the compiler with '-p', the backend cpp process
doesn't handle // comments properly unless you also give ?c the undocumented
'-+' option (which it passes through to cpp).

--- a/sys/src/cmd/cc/lex.c

+++ b/sys/src/cmd/cc/lex.c

@@ -242,12 +242,10 @@

 			close(fd[1]);

 			av[0] = CPP;

 			i = 1;

+			sprint(opt, "-+");

+			av[i++] = strdup(opt);

 			if(debug['.']){

 				sprint(opt, "-.");

-				av[i++] = strdup(opt);

-			}

-			if(debug['+']) {

-				sprint(opt, "-+");

 				av[i++] = strdup(opt);

 			}

 			for(c = 0; c < ndef; c++) {

-- 

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