From 0796b38e13a596e32c5bfd968e868b8e8ec3c8de Mon Sep 17 00:00:00 2001
From: Karl von Randow <karl@xk72.com>
Date: Thu, 15 Sep 2022 20:40:15 +1200
Subject: [PATCH] Disable building neon on Apple Silicon

---
 lib/install.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/install.js b/lib/install.js
index ee06a8b..9e073d5 100644
--- a/lib/install.js
+++ b/lib/install.js
@@ -13,10 +13,15 @@ import bin from './index.js';
 		console.info('compiling from source');
 
 		try {
+			let buildFlags = ''
+			if (process.arch === 'arm64') {
+				buildFlags = 'CPPFLAGS="-DPNG_ARM_NEON_OPT=0" '
+			}
+
 			const source = fileURLToPath(new URL('../vendor/source/optipng.tar.gz', import.meta.url));
 			// From https://sourceforge.net/projects/optipng/files/OptiPNG/
 			await binBuild.file(source, [
-				`./configure --with-system-zlib --prefix="${bin.dest()}" --bindir="${bin.dest()}"`,
+				`${buildFlags}./configure --with-system-zlib --prefix="${bin.dest()}" --bindir="${bin.dest()}"`,
 				'make install',
 			]);