[hackers] [scc] Fix install() || Roberto E. Vargas Caballero

[git]

commit 66915c0956d505bf60140ff48021c0725edfa02c
Author:     Roberto E. Vargas Caballero <k...@shike2.com>
AuthorDate: Thu Aug 13 09:43:58 2015 +0200
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Thu Aug 13 09:43:58 2015 +0200

    Fix install()
    
    Install() failed when we wanted install a symbol in a different
    namespace where it was looked, and it was not declared.

diff --git a/cc1/symbol.c b/cc1/symbol.c
index 19ef002..e67784d 100644
--- a/cc1/symbol.c
+++ b/cc1/symbol.c
@@ -247,13 +247,18 @@ Symbol *
 install(unsigned ns, Symbol *sym)
 {
        if (sym->ctx == curctx) {
-               if (sym->flags & ISDECLARED)
-                       return NULL;
-               sym->flags |= ISDECLARED;
-       } else {
-               sym = linkhash(newsym(ns), sym->name);
+               if (sym->flags & ISDECLARED) {
+                       if (ns == sym->ns)
+                               return NULL;
+               } else {
+                       sym->flags |= ISDECLARED;
+                       sym->ns = ns;
+                       goto assign_id;
+               }
        }
+       sym = linkhash(newsym(ns), sym->name);
 
+assign_id:
        if (sym->ns != NS_CPP)
                sym->id = (curctx) ? ++localcnt : ++globalcnt;