From 0c5160dd1cf19a30e8c4459f722dc632e2b769d3 Mon Sep 17 00:00:00 2001
From: Ben Kirzhner <ben.kirzhner@gmail.com>
Date: Mon, 22 May 2023 11:11:51 -0400
Subject: [PATCH] Use c standard w/o warnings on macOS >=13.3

  See itgmania/itgmania#107 for error details.
---
 extern/CMakeProject-tomcrypt.cmake | 5 +++++
 extern/CMakeProject-zlib.cmake     | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/extern/CMakeProject-tomcrypt.cmake b/extern/CMakeProject-tomcrypt.cmake
index e4551d358f..ebc23ede8a 100644
--- a/extern/CMakeProject-tomcrypt.cmake
+++ b/extern/CMakeProject-tomcrypt.cmake
@@ -471,6 +471,11 @@ endif()
 
 if(APPLE)
   set_property(TARGET "tomcrypt" PROPERTY XCODE_ATTRIBUTE_GCC_NO_COMMON_BLOCKS "YES")
+
+  # Fixes build failures due to warnings on macOS >= 13.3
+  # See itgmania/itgmania#107 for details
+  set_property(TARGET "tomcrypt" PROPERTY C_STANDARD 90)
+  set_property(TARGET "tomcrypt" PROPERTY C_STANDARD_REQUIRED ON)
 endif()
 if(MSVC)
   target_compile_definitions("tomcrypt" PRIVATE _CRT_SECURE_NO_WARNINGS)
diff --git a/extern/CMakeProject-zlib.cmake b/extern/CMakeProject-zlib.cmake
index 62e8b13df9..725171af04 100644
--- a/extern/CMakeProject-zlib.cmake
+++ b/extern/CMakeProject-zlib.cmake
@@ -32,6 +32,13 @@ add_library("zlib" STATIC ${ZLIB_SRC} ${ZLIB_HPP})
 
 set_property(TARGET "zlib" PROPERTY FOLDER "External Libraries")
 
+if(APPLE)
+  # Fixes build failures due to warnings on macOS >= 13.3
+  # See itgmania/itgmania#107 for details
+  set_property(TARGET "zlib" PROPERTY C_STANDARD 90)
+  set_property(TARGET "zlib" PROPERTY C_STANDARD_REQUIRED ON)
+endif(APPLE)
+
 disable_project_warnings("zlib")
 
 if(MSVC)