From 4a3e96281d6b9ae3dbc20e638f389677df9a649e Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Wed, 5 Jun 2019 00:40:45 -0400
Subject: [PATCH] Handle SIGWINCH in main thread

For the SIGWINCH signal to be caught, it needs to be set in sigaction
on the main thread. Previously, this was broken, and updateWindowSize
was never being called. Tested on macOS 10.14.
---
 src/libmain/shared.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 4ed34e54d..f2aeec9e1 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -125,6 +125,9 @@ void initNix()
     act.sa_handler = sigHandler;
     if (sigaction(SIGUSR1, &act, 0)) throw SysError("handling SIGUSR1");
 
+    /* Make sure SIGWINCH is handled as well. */
+    if (sigaction(SIGWINCH, &act, 0)) throw SysError("handling SIGWINCH");
+
     /* Register a SIGSEGV handler to detect stack overflows. */
     detectStackOverflow();