CI builds should use 10.12 as min macOS version

.github/workflows/build.yml

@@ -50,7 +50,7 @@ jobs:
         run: |
           git submodule update --init --recursive
           brew install scons
-          scons platform=osx target=release bits=64 godot_cpp=yes generate_bindings=yes use_custom_api_file=yes custom_api_file=api.ci.json macos_arch=universal use_llvm=yes -j $(sysctl -n hw.logicalcpu)
+          scons platform=osx target=release bits=64 godot_cpp=yes generate_bindings=yes use_custom_api_file=yes custom_api_file=api.ci.json macos_arch=universal macos_deployment_target=10.13 use_llvm=yes -j $(sysctl -n hw.logicalcpu)
           otool -L demo/addons/godot-git-plugin/osx/libgitapi.dylib
       - uses: actions/upload-artifact@v2
         with:

SConstruct

@@ -33,6 +33,7 @@ opts.Add(PathVariable("macos_openssl_static_ssl", "Path to OpenSSL libssl.a libr
          os.path.join(os.path.abspath(os.getcwd()), "thirdparty/openssl/libssl.a"), PathVariable.PathAccept))
 opts.Add(PathVariable("macos_openssl_static_crypto", "Path to OpenSSL libcrypto.a library - only used in macOS builds.",
          os.path.join(os.path.abspath(os.getcwd()), "thirdparty/openssl/libcrypto.a"), PathVariable.PathAccept))
+opts.Add("macos_deployment_target", "macOS deployment target", "default")
 
 # Updates the environment with the option variables.
 opts.Update(env)
@@ -49,6 +50,12 @@ if env["platform"] == "osx":
         env.Append(LINKFLAGS=["-arch", env["macos_arch"]])
         env.Append(CCFLAGS=["-arch", env["macos_arch"]])
 
+    if env["macos_deployment_target"] != "default":
+        env.Append(CCFLAGS=["-mmacosx-version-min=" +
+                            env["macos_deployment_target"]])
+        env.Append(LINKFLAGS=["-mmacosx-version-min=" +
+                              env["macos_deployment_target"]])
+
 Export("env")
 
 SConscript("thirdparty/SCsub")

build_openssl_universal_osx.sh

@@ -12,9 +12,9 @@ cd openssl_arm64
 make
 cd ../
 cd openssl_x86_64
-./Configure darwin64-x86_64-cc
+./Configure darwin64-x86_64-cc -mmacosx-version-min=10.13
 make
 cd ../
-lipo -create openssl_arm64/libcrypto.a openssl_x86_64/libcrypto.a -output libcrypto.a
-lipo -create openssl_arm64/libssl.a openssl_x86_64/libssl.a -output libssl.a
+lipo -create openssl_arm64/libcrypto.a openssl_x86_64/libcrypto.a -output thirdparty/openssl/libcrypto.a
+lipo -create openssl_arm64/libssl.a openssl_x86_64/libssl.a -output thirdparty/openssl/libssl.a
 rm openssl-$OPENSSL_VERSION.tar.gz