From de5937b45e47346f7c1de121279dc62d473e1d64 Mon Sep 17 00:00:00 2001
From: Daniel Bertalan <dani@danielbertalan.dev>
Date: Thu, 23 Dec 2021 11:03:44 +0100
Subject: [PATCH] Ports/m4: Fix build error

The addition of the siginfo() function to LibC caused this port to
enable its stack overflow detection feature which, however, depends on
more features that we don't have.
---
 Ports/m4/package.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Ports/m4/package.sh b/Ports/m4/package.sh
index 54ff9d4a02..33dd797e13 100755
--- a/Ports/m4/package.sh
+++ b/Ports/m4/package.sh
@@ -7,3 +7,6 @@ https://ftpmirror.gnu.org/gnu/m4/m4-${version}.tar.gz.sig m4-${version}.tar.gz.s
 https://ftpmirror.gnu.org/gnu/gnu-keyring.gpg gnu-keyring.gpg"
 auth_type="sig"
 auth_opts=("--keyring" "./gnu-keyring.gpg" "m4-${version}.tar.gz.sig")
+
+# Stack overflow detection needs siginfo and sbrk, neither of which we support
+export M4_cv_use_stackovf=no