macOS: Use godot-mono-builds scripts, add macOS arm64

This changes our handmade `configure` calls to rely on the streamlined build
process from `godot-mono-builds`, so that our builds are consistent with the
ones generated there.

This enables us to target macOS arm64 easily as neikeq did the relevant work
in the `godot-mono-builds` scripts.

Includes a backport of https://github.com/mono/mono/pull/21147 to fix Mono
build with `godot-mono-builds` using a wrapper for osxcross.

Dockerfile.osx

@@ -19,30 +19,15 @@ ENV PATH="/root/osxcross/target/bin:${PATH}"
 
 RUN cp -a /root/files/${mono_version} /root && \
     cd /root/${mono_version} && \
-    export CMAKE=/root/osxcross/target/bin/x86_64-apple-darwin20.2-cmake && \
+    patch -p1 < /root/files/patches/mono-btls-cmake-wrapper.patch && \
-    NOCONFIGURE=1 ./autogen.sh && \
+    export MONO_SOURCE_ROOT=/root/${mono_version} && \
-    ./configure --prefix=/root/dependencies/mono \
+    export OSXCROSS_SDK=20.2 && \
-        --build=x86_64-linux-gnu \
+    cd /root/${mono_version}/godot-mono-builds && \
-        --host=x86_64-apple-darwin20.2 \
+    python3 osx.py configure -j --target=x86_64 --target=arm64 && \
-        --disable-boehm \
+    python3 osx.py make -j --target=x86_64 --target=arm64 && \
-        --disable-mcs-build \
+    python3 bcl.py make --product=desktop && \
-        --with-tls=pthread \
+    python3 osx.py copy-bcl --target=x86_64 --target=arm64 && \
-        --disable-dtrace \
-        --disable-executables \
-        mono_cv_uscore=yes \
-        _lt_dar_can_shared=yes \
-        CC=o64-clang \
-        CXX=o64-clang++ && \
-    make -j && \
-    make install && \
     cd /root && \
-    rm -rf /root/dependencies/mono/bin/mono{,-sgen} /root/dependencies/mono/lib/mono && \
-    ln -s /usr/bin/mono /root/dependencies/mono/bin/mono && \
-    ln -s /usr/bin/mono-sgen /root/dependencies/mono/bin/mono-sgen && \
-    ln -s /usr/lib/mono /root/dependencies/mono/lib/mono && \
-    mkdir -p /root/dependencies/mono/etc && \
-    cp -rvp /etc/mono /root/dependencies/mono/etc/ && \
-    cp /root/files/mono-config-macosx /root/dependencies/mono/etc/mono/config && \
     rm -rf /root/${mono_version}
 
 CMD /bin/bash

files/mono-config-macosx

@@ -1,46 +0,0 @@
-<configuration>
-	<dllmap dll="i:cygwin1.dll" target="libc.dylib" os="!windows" />
-	<dllmap dll="libc" target="libc.dylib" os="!windows"/>
-	<dllmap dll="intl" target="libintl.dylib" os="!windows"/>
-	<dllmap dll="intl" name="bind_textdomain_codeset" target="libc.dylib" os="solaris"/>
-	<dllmap dll="libintl" name="bind_textdomain_codeset" target="libc.dylib" os="solaris"/>
-	<dllmap dll="libintl" target="libintl.dylib" os="!windows"/>
-	<dllmap dll="i:libxslt.dll" target="libxslt.dylib" os="!windows"/>
-	<dllmap dll="i:odbc32.dll" target="libodbc.dylib" os="!windows"/>
-	<dllmap dll="i:odbc32.dll" target="libiodbc.dylib" os="osx"/>
-	<dllmap dll="oci" target="libclntsh.dylib" os="!windows"/>
-	<dllmap dll="db2cli" target="libdb2_36.dylib" os="!windows"/>
-	<dllmap dll="MonoPosixHelper" target="$mono_libdir/libMonoPosixHelper.dylib" os="!windows" />
-	<dllmap dll="System.Native" target="$mono_libdir/libmono-native-compat.dylib" os="!windows" />
-	<dllmap dll="System.Net.Security.Native" target="$mono_libdir/libmono-native-compat.dylib" os="!windows" />
-	<dllmap dll="System.Security.Cryptography.Native.Apple" target="$mono_libdir/libmono-native-compat.dylib" os="osx" />
-	<dllmap dll="libmono-btls-shared" target="$mono_libdir/libmono-btls-shared.dylib" os="!windows" />
-	<dllmap dll="i:msvcrt" target="libc.dylib" os="!windows"/>
-	<dllmap dll="i:msvcrt.dll" target="libc.dylib" os="!windows"/>
-	<dllmap dll="sqlite" target="libsqlite.0.dylib" os="!windows"/>
-	<dllmap dll="sqlite3" target="libsqlite3.0.dylib" os="!windows"/>
-	<dllmap dll="libX11" target="libX11.dylib" os="!windows" />
-	<dllmap dll="libgdk-x11-2.0" target="libgdk-x11-2.0.dylib" os="!windows"/>
-	<dllmap dll="libgdk_pixbuf-2.0" target="libgdk_pixbuf-2.0.so.0" os="!windows"/>
-	<dllmap dll="libgtk-x11-2.0" target="libgtk-x11-2.0.dylib" os="!windows"/>
-	<dllmap dll="libglib-2.0" target="libglib-2.0.so.0" os="!windows"/>
-	<dllmap dll="libgobject-2.0" target="libgobject-2.0.so.0" os="!windows"/>
-	<dllmap dll="libgnomeui-2" target="libgnomeui-2.so.0" os="!windows"/>
-	<dllmap dll="librsvg-2" target="librsvg-2.so.2" os="!windows"/>
-	<dllmap dll="libXinerama" target="libXinerama.so.1" os="!windows" />
-	<dllmap dll="libasound" target="libasound.so.2" os="!windows" />
-	<dllmap dll="libcairo-2.dll" target="libcairo.so.2" os="!windows"/>
-	<dllmap dll="libcairo-2.dll" target="libcairo.2.dylib" os="osx"/>
-	<dllmap dll="libcups" target="libcups.so.2" os="!windows"/>
-	<dllmap dll="libcups" target="libcups.dylib" os="osx"/>
-	<dllmap dll="i:kernel32.dll">
-		<dllentry dll="__Internal" name="CopyMemory" target="mono_win32_compat_CopyMemory"/>
-		<dllentry dll="__Internal" name="FillMemory" target="mono_win32_compat_FillMemory"/>
-		<dllentry dll="__Internal" name="MoveMemory" target="mono_win32_compat_MoveMemory"/>
-		<dllentry dll="__Internal" name="ZeroMemory" target="mono_win32_compat_ZeroMemory"/>
-	</dllmap>
-	<dllmap dll="gdiplus" target="libgdiplus.dylib" os="!windows"/>
-	<dllmap dll="gdiplus.dll" target="libgdiplus.dylib"  os="!windows"/>
-	<dllmap dll="gdi32" target="libgdiplus.dylib" os="!windows"/>
-	<dllmap dll="gdi32.dll" target="libgdiplus.dylib" os="!windows"/>
-</configuration>

files/patches/mono-btls-cmake-wrapper.patch

@@ -0,0 +1,13 @@
+diff --git a/mono/btls/Makefile.am b/mono/btls/Makefile.am
+index 9a385443..094b26f4 100644
+--- a/mono/btls/Makefile.am
++++ b/mono/btls/Makefile.am
+@@ -58,7 +58,7 @@ all-local: build-shared/libmono-btls-shared$(libsuffix)
+ 
+ build-shared/$(BUILDFILE):
+ 	-mkdir -p build-shared
+-	(cd build-shared && CC="$(CC)" CXX="$(CXX)" "$(CMAKE)" $(CMAKE_ARGS) $(BTLS_CMAKE_ARGS) -DBUILD_SHARED_LIBS=1 "$(abs_top_srcdir)/mono/btls")
++	(cd build-shared && CC="$(CC)" CXX="$(CXX)" $(CMAKE) $(CMAKE_ARGS) $(BTLS_CMAKE_ARGS) -DBUILD_SHARED_LIBS=1 "$(abs_top_srcdir)/mono/btls")
+ 
+ if NINJA
+ build-shared/libmono-btls-shared$(libsuffix): build-shared/$(BUILDFILE) $(MONO_BTLS_SOURCES_FILES)