[cpp] Docker build for GCC testing, minor GCC fixes

spine-c/Dockerfile

@@ -0,0 +1,15 @@
+FROM ubuntu:24.04
+
+# Install build dependencies for spine-c
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    cmake \
+    ninja-build \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /workspace
+
+# Default command
+CMD ["bash"]

spine-c/build-docker.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -e
+
+# Get to the script's directory
+cd "$(dirname "$0")"
+
+# Build Docker image if it doesn't exist or if Dockerfile changed
+IMAGE_NAME="spine-c-build"
+if ! docker images | grep -q "$IMAGE_NAME" || [ Dockerfile -nt .docker-built ]; then
+    echo "Building Docker image for spine-c..."
+    docker build -t "$IMAGE_NAME" .
+    touch .docker-built
+fi
+
+# Clean build directory to avoid platform conflicts
+if [ -d "build" ]; then
+    echo "Cleaning build directory to avoid platform conflicts..."
+    rm -rf build
+fi
+
+# Run the build in Docker
+echo "Building spine-c in Docker container..."
+docker run --rm \
+    -v "$(cd .. && pwd)":/workspace \
+    -w /workspace/spine-c \
+    "$IMAGE_NAME" \
+    ./build.sh "$@"

spine-c/src/base.h

@@ -56,11 +56,32 @@
 #endif
 #endif
 
+#if defined(__clang__)
+/* Clang needs to suppress both pedantic and C/C++ compatibility warnings */
+#define SPINE_OPAQUE_TYPE(name) \
+	_Pragma("clang diagnostic push") \
+	_Pragma("clang diagnostic ignored \"-Wpedantic\"") \
+	_Pragma("clang diagnostic ignored \"-Wextern-c-compat\"") \
+	typedef struct name##_wrapper { \
+	} name##_wrapper; \
+	_Pragma("clang diagnostic pop") \
+	typedef name##_wrapper *name;
+#elif defined(__GNUC__)
+/* GCC only needs to suppress pedantic warning */
+#define SPINE_OPAQUE_TYPE(name) \
+	_Pragma("GCC diagnostic push") \
+	_Pragma("GCC diagnostic ignored \"-Wpedantic\"") \
+	typedef struct name##_wrapper { \
+	} name##_wrapper; \
+	_Pragma("GCC diagnostic pop") \
+	typedef name##_wrapper *name;
+#else
+/* Other compilers - generic version */
 #define SPINE_OPAQUE_TYPE(name) \
 	typedef struct name##_wrapper { \
-		char _dummy;                                                                                                                                 \
 	} name##_wrapper; \
 	typedef name##_wrapper *name;
+#endif
 
 typedef long long spine_property_id;
 

spine-cpp/include/spine/Array.h

@@ -80,7 +80,6 @@ namespace spine {
 		}
 
 		inline Array<T> &setSize(size_t newSize, const T &defaultValue) {
-			assert(newSize >= 0);
 			size_t oldSize = _size;
 			_size = newSize;
 			if (_capacity < newSize) {

spine-cpp/src/spine/BonePose.cpp

@@ -133,7 +133,7 @@ void BonePose::updateWorldTransform(Skeleton &skeleton) {
 			za *= s;
 			zc *= s;
 			s = MathUtil::sqrt(za * za + zc * zc);
-			if (_inherit == Inherit_NoScale && (pa * pd - pb * pc < 0) != (skeleton.getScaleX() < 0 != skeleton.getScaleY() < 0)) s = -s;
+			if (_inherit == Inherit_NoScale && (pa * pd - pb * pc < 0) != ((skeleton.getScaleX() < 0) != (skeleton.getScaleY() < 0))) s = -s;
 			r = MathUtil::Pi / 2 + MathUtil::atan2(zc, za);
 			float zb = MathUtil::cos(r) * s;
 			float zd = MathUtil::sin(r) * s;
@@ -207,7 +207,7 @@ void BonePose::updateLocalTransform(Skeleton &skeleton) {
 				pa *= s;
 				pc *= s;
 				s = MathUtil::sqrt(pa * pa + pc * pc);
-				if (_inherit == Inherit_NoScale && pid < 0 != (skeleton.getScaleX() < 0 != skeleton.getScaleY() < 0)) s = -s;
+				if (_inherit == Inherit_NoScale && (pid < 0) != ((skeleton.getScaleX() < 0) != (skeleton.getScaleY() < 0))) s = -s;
 				r = MathUtil::Pi / 2 + MathUtil::atan2(pc, pa);
 				pb = MathUtil::cos(r) * s;
 				pd = MathUtil::sin(r) * s;