Fix build on arm64 linux

Author: floppyhammer

CMakeLists.txt

@@ -29,7 +29,12 @@ elseif (APPLE)
     set(PATHFINDER_BACKEND_OPENGL OFF)
     set(PATHFINDER_BACKEND_VULKAN ON)
 elseif (LINUX)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1")
+    if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|aarch64")
+        message(STATUS "Building on ARM architecture")
+    else()
+        message(STATUS "Not on ARM architecture")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1")
+    endif()
 endif ()
 
 add_subdirectory(pathfinder)

pathfinder/common/f32x4.h

@@ -12,7 +12,7 @@
 #undef max
 
 #ifdef PATHFINDER_ENABLE_SIMD
-    #ifdef __ANDROID__
+    #if defined(__ANDROID__) || (defined(__linux__) && defined(__ARM_ARCH))
         // Converts Intel SSE intrinsics to Arm/Aarch64 NEON intrinsics.
         #include <sse2neon.h>
     #else

pathfinder/gpu/gl/window_builder.cpp

@@ -31,20 +31,30 @@ bool is_extension_supported(const char *name) {
 WindowBuilderGl::WindowBuilderGl(const Vec2I &logical_size) {
     glfwInit();
 
-    // Major GL version.
-    #ifdef PATHFINDER_ENABLE_D3D11
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+    #if (defined(__linux__) && defined(__ARM_ARCH))
+        // Set the desired OpenGL ES version.
+        glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+        #ifdef PATHFINDER_ENABLE_D3D11
+        glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
+        #else
+        glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
+        #endif
     #else
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-    #endif
+        // Major GL version.
+        #ifdef PATHFINDER_ENABLE_D3D11
+        glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+        #else
+        glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+        #endif
 
-    // Minor GL version.
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+        // Minor GL version.
+        glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
 
-    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+        glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
-    #ifdef __APPLE__
-    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+        #ifdef __APPLE__
+        glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+        #endif
     #endif
 
     float dpi_scaling_factor;