From a395f9e31b0b01ac29205c0df35e86ed1bae3f17 Mon Sep 17 00:00:00 2001
From: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>
Date: Tue, 6 Jun 2023 22:55:12 +0800
Subject: [PATCH] opencv@3: fix build failure on Linux

Follow-up to #131405.
---
 Formula/opencv@3.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Formula/opencv@3.rb b/Formula/opencv@3.rb
index 5c5e10e07448c..45ef91df6896c 100644
--- a/Formula/opencv@3.rb
+++ b/Formula/opencv@3.rb
@@ -116,6 +116,9 @@ def install
       args << "-DENABLE_SSE41=OFF" << "-DENABLE_SSE42=OFF" unless MacOS.version.requires_sse42?
     end
 
+    # error: ‘...’ has virtual functions and accessible non-virtual destructor [-Werror=non-virtual-dtor]
+    ENV.append_to_cflags "-Wno-non-virtual-dtor" if OS.linux?
+
     system "cmake", "-S", ".", "-B", "build_shared", *args
     inreplace "build_shared/modules/core/version_string.inc", "#{Superenv.shims_path}/", ""
     system "cmake", "--build", "build_shared"