CMake build script patch for Dolphin, PR# 9441

Dolphin_cmake_prefix.patch

From a51d9cdde1774fd2c86ec3db4d85f5b7b036f2d9 Mon Sep 17 00:00:00 2001
From: Christopher Snowhill <kode54@gmail.com>
Date: Sun, 2 May 2021 17:59:06 -0700
Subject: [PATCH] Apple M1: Implement CMake Prefix Path override

Fixes issues, if, for instance, the `fmt` package is installed by Homebrew.
---
 BuildMacOSUniversalBinary.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/BuildMacOSUniversalBinary.py b/BuildMacOSUniversalBinary.py
index fef29e1d10..faef192813 100755
--- a/BuildMacOSUniversalBinary.py
+++ b/BuildMacOSUniversalBinary.py
@@ -42,6 +42,12 @@ DEFAULT_CONFIG = {
     # Build Target (dolphin-emu to just build the emulator and skip the tests)
     "build_target": "ALL_BUILD",
 
+    # Location where base packages should be searched from
+    # The default values of these paths are taken from the default
+    # paths used for homebrew
+    "arm64_cmake_prefix_path": "/opt/homebrew",
+    "x86_64_cmake_prefix_path": "/usr/local",
+
     # Locations to pkg config files for arm and x64 libraries
     # The default values of these paths are taken from the default
     # paths used for homebrew
@@ -123,6 +129,12 @@ def parse_args(conf=DEFAULT_CONFIG):
         dest="codesign_identity")
 
     for arch in ARCHITECTURES:
+        parser.add_argument(
+             '--{}_cmake_prefix'.format(arch),
+             help="Folder containing the Homebrew installation for {}".format(arch),
+             default=conf[arch+"_cmake_prefix_path"],
+             dest=arch+"_cmake_prefix_path")
+
         parser.add_argument(
              '--{}_pkg_config'.format(arch),
              help="Folder containing .pc files for {} libraries".format(arch),
@@ -229,6 +241,7 @@ def build(config):
             os.mkdir(arch)
 
         env = os.environ.copy()
+        env['CMAKE_PREFIX_PATH'] = config[arch+"_cmake_prefix_path"]
         env['PKG_CONFIG_PATH'] = config[arch+"_pkg_config_path"]
         env['Qt5_DIR'] = config[arch+"_qt5_path"]
         env['CMAKE_OSX_ARCHITECTURES'] = arch
-- 
2.30.1 (Apple Git-130)