From d4da2a15c4dcff02bac7bc89bbd2456afd9666a7 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sat, 26 Dec 2020 11:41:02 +0200
Subject: [PATCH] build script: support arm64 cross-compilation for jpeg-turbo

---
 build.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/build.py b/build.py
index fdf0f040..8250a840 100755
--- a/build.py
+++ b/build.py
@@ -886,6 +886,15 @@ class JpegTurboTarget(CMakeStaticDependencyTarget):
             'https://downloads.sourceforge.net/project/libjpeg-turbo/2.0.6/libjpeg-turbo-2.0.6.tar.gz',
             'd74b92ac33b0e3657123ddcf6728788c90dc84dcb6a52013d758af3c4af481bb')
 
+    def configure(self, builder: 'Builder'):
+        if builder.architecture() == 'arm64':
+            opts = self.options
+            opts['CMAKE_SYSTEM_NAME'] = 'Darwin'
+            opts['CMAKE_SYSTEM_PROCESSOR'] = 'aarch64'
+            opts['CMAKE_AR'] = '/usr/bin/ar'
+
+        super().configure(builder)
+
     def detect(self, builder: 'Builder') -> bool:
         return os.path.exists(builder.source_path + 'turbojpeg.h')