[hackers] [scc] [cc1] Clear SEXTERN for global symbols previously declared as extern || Michael Forney

[git]

commit 149ab2b982334ac3efa9034e595afff1b9df17ad
Author:     Michael Forney <mfor...@mforney.org>
AuthorDate: Mon Feb 20 13:10:28 2017 -0800
Commit:     Roberto E. Vargas Caballero <k...@shike2.com>
CommitDate: Mon Feb 20 22:21:19 2017 +0100

    [cc1] Clear SEXTERN for global symbols previously declared as extern

diff --git a/cc1/decl.c b/cc1/decl.c
index 0a5842b..0b696cb 100644
--- a/cc1/decl.c
+++ b/cc1/decl.c
@@ -703,7 +703,8 @@ redcl(Symbol *sym, Type *tp, Symbol **pars, int sclass)
                break;
        case NOSCLASS:
                if ((flags & SPRIVATE) == 0) {
-                       flags &= ~SEXTERN;
+                       if (flags & SEXTERN)
+                               flags &= ~(SEXTERN|SEMITTED);
                        flags |= SGLOBAL;
                        break;
                }
diff --git a/tests/execute/0113-externredecl.c 
b/tests/execute/0113-externredecl.c
new file mode 100644
index 0000000..0e76572
--- /dev/null
+++ b/tests/execute/0113-externredecl.c
@@ -0,0 +1,8 @@
+extern int x;
+int x;
+
+int
+main()
+{
+       return x;
+}
diff --git a/tests/execute/scc-tests.lst b/tests/execute/scc-tests.lst
index e2938b9..9d42b60 100644
--- a/tests/execute/scc-tests.lst
+++ b/tests/execute/scc-tests.lst
@@ -103,3 +103,4 @@
 0110-typedefcast.c
 0111-doubledef.c
 0112-cond.c
+0113-externredecl.c