[Linux] Add arm32/arm64 linux builds support

Fix arch detection in GDNative builds (3.x) and add a small patch to
avoid warnings spam on ARM.

Make CMake march flags explicit for Linux arm32/arm64.

Add new platforms to CI.

3 files changed, 44 insertions, 4 deletions

diff --git a/misc/patches/gdnantive_arm_warnings.diff b/misc/patches/gdnantive_arm_warnings.diff
new file mode 100644
index 0000000..4f1f085
--- /dev/null
+++ b/misc/patches/gdnantive_arm_warnings.diff
@@ -0,0 +1,34 @@
+diff --git a/godot-cpp-3.x/godot-headers/gdnative/gdnative.h b/godot-cpp-3.x/godot-headers/gdnative/gdnative.h
+index c0573d21b5d7a..ec95c4c4ebfcc 100644
+--- a/godot-cpp-3.x/godot-headers/gdnative/gdnative.h
++++ b/godot-cpp-3.x/godot-headers/gdnative/gdnative.h
+@@ -37,20 +37,24 @@ extern "C" {
+ 
+ #if defined(_WIN32) || defined(__ANDROID__)
+ #define GDCALLINGCONV
+-#define GDAPI GDCALLINGCONV
++
+ #elif defined(__APPLE__)
+ #include "TargetConditionals.h"
+ #if TARGET_OS_IPHONE
+ #define GDCALLINGCONV __attribute__((visibility("default")))
+-#define GDAPI GDCALLINGCONV
+ #elif TARGET_OS_MAC
+ #define GDCALLINGCONV __attribute__((sysv_abi))
+-#define GDAPI GDCALLINGCONV
+ #endif
+-#else // !_WIN32 && !__APPLE__
++
++#else // Linux/BSD/Web
++#if defined(__aarch64__) || defined(__arm__)
++#define GDCALLINGCONV
++#else
+ #define GDCALLINGCONV __attribute__((sysv_abi))
+-#define GDAPI GDCALLINGCONV
+ #endif
++#endif
++
++#define GDAPI GDCALLINGCONV
+ 
+ // This is for libraries *using* the header, NOT GODOT EXPOSING STUFF!!
+ #if !defined(GDN_EXPORT)
diff --git a/misc/scripts/file_format.sh b/misc/scripts/file_format.sh
index 94a3aff..f89e534 100755
--- a/misc/scripts/file_format.sh
+++ b/misc/scripts/file_format.sh
@@ -39,6 +39,8 @@ for f in "${files[@]}"; do
         continue
     elif [[ "$f" == "thirdparty/"* ]]; then
         continue
+    elif [[ "$f" == "misc/patches/"* ]]; then
+        continue
     elif [[ "$f" == *"/thirdparty/"* ]]; then
         continue
     elif [[ "$f" == "platform/android/java/lib/src/com/google"* ]]; then
diff --git a/misc/webrtc.tres b/misc/webrtc.tres
index bdcb80f..2b682ae 100644
--- a/misc/webrtc.tres
+++ b/misc/webrtc.tres
@@ -6,10 +6,14 @@ reloadable = false
 entry/OSX.64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.macos.{TARGET}.universal.dylib"
 entry/Windows.64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.windows.{TARGET}.x86_64.dll"
 entry/Windows.32 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.windows.{TARGET}.x86_32.dll"
-entry/X11.64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_64.so"
-entry/X11.32 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_32.so"
-entry/Server.64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_64.so"
-entry/Server.32 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_32.so"
+entry/X11.64.x86_64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_64.so"
+entry/X11.32.x86_32 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_32.so"
+entry/X11.64.arm64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.arm64.so"
+entry/X11.32.arm32 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.arm32.so"
+entry/Server.64.x86_64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_64.so"
+entry/Server.32.x86_32 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.x86_32.so"
+entry/Server.64.arm64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.arm64.so"
+entry/Server.32.arm32 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.linux.{TARGET}.arm32.so"
 entry/Android.arm64-v8a = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.android.{TARGET}.arm64.so"
 entry/Android.x64 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.android.{TARGET}.x86_64.so"
 entry/iOS.armv7 = "res://{GDNATIVE_PATH}/lib/libwebrtc_native.ios.{TARGET}.armv32.dylib"