From 2c5c8f3bca082c0822a9b2a247689b882980cc47 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Wed, 15 Oct 2025 10:05:01 +0200
Subject: c: redeclaration ok when old was unspecified length array

---
 c.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'c.c')

diff --git a/c.c b/c.c
index 8109a9b..0f4c0f1 100644
--- a/c.c
+++ b/c.c
@@ -207,6 +207,13 @@ redeclarationok(const struct decl *old, const struct decl *new)
          break;
       /*fallthru*/
    case SCEXTERN:
+      if (old->ty.t == TYARRAY && new->ty.t == TYARRAY
+       && typechild(old->ty).bits == typechild(new->ty).bits
+       && isincomplete(old->ty))
+      {
+         return 1;
+      }
+      /*fallthru*/
    case SCTYPEDEF:
       return old->ty.bits == new->ty.bits;
    }
-- 
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