Support compiling third party library C files as C code

Source/Editor/Content/Items/CppScriptItem.cs

@@ -20,7 +20,7 @@ namespace FlaxEditor.Content
         }
 
         /// <inheritdoc />
-        public override string TypeDescription => Path.EndsWith(".h") ? "C++ Header File" : "C++ Source Code";
+        public override string TypeDescription => Path.EndsWith(".h") || Path.EndsWith(".hpp") ? "C++ Header File" : "C++ Source Code";
 
         /// <inheritdoc />
         public override SpriteHandle DefaultThumbnail => Editor.Instance.Icons.CPPScript128;

Source/Editor/CustomEditors/Dedicated/LocalizationSettingsEditor.cs

@@ -186,12 +186,12 @@ namespace FlaxEditor.CustomEditors.Dedicated
                     foreach (var file in files)
                         FindNewKeysCSharp(file, newKeys, allKeys);
 
-                    // C++
+                    // C/C++
-                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.cpp", SearchOption.AllDirectories);
+                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.cpp", SearchOption.AllDirectories).Concat(Directory.GetFiles(Globals.ProjectSourceFolder, "*.c", SearchOption.AllDirectories)).ToArray();
                     filesCount += files.Length;
                     foreach (var file in files)
                         FindNewKeysCpp(file, newKeys, allKeys);
-                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.h", SearchOption.AllDirectories);
+                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.h", SearchOption.AllDirectories).Concat(Directory.GetFiles(Globals.ProjectSourceFolder, "*.hpp", SearchOption.AllDirectories)).ToArray();;
                     filesCount += files.Length;
                     foreach (var file in files)
                         FindNewKeysCpp(file, newKeys, allKeys);

Source/Editor/Modules/ContentDatabaseModule.cs

@@ -1008,7 +1008,7 @@ namespace FlaxEditor.Modules
                     ContentItem item;
                     if (path.EndsWith(".cs"))
                         item = new CSharpScriptItem(path);
-                    else if (path.EndsWith(".cpp") || path.EndsWith(".h"))
+                    else if (path.EndsWith(".cpp") || path.EndsWith(".h") || path.EndsWith(".c") || path.EndsWith(".hpp"))
                         item = new CppScriptItem(path);
                     else if (path.EndsWith(".shader") || path.EndsWith(".hlsl"))
                         item = new ShaderSourceItem(path);

Source/Editor/Modules/ContentImportingModule.cs

@@ -222,7 +222,7 @@ namespace FlaxEditor.Modules
                 outputExtension = extension;
 
                 // Check if can place source files here
-                if (!targetLocation.CanHaveScripts && (extension == ".cs" || extension == ".cpp" || extension == ".h"))
+                if (!targetLocation.CanHaveScripts && (extension == ".cs" || extension == ".cpp" || extension == ".h" || extension == ".c" || extension == ".hpp"))
                 {
                     // Error
                     Editor.LogWarning(string.Format("Cannot import \'{0}\' to \'{1}\'. The target directory cannot have scripts.", inputPath, targetLocation.Node.Path));

Source/Editor/Scripting/ScriptsBuilder.cpp

@@ -120,9 +120,13 @@ void ScriptsBuilderImpl::sourceDirEvent(const String& path, FileSystemAction act
     // Discard non-source files or generated files
     if ((!path.EndsWith(TEXT(".cs")) &&
         !path.EndsWith(TEXT(".cpp")) &&
+        !path.EndsWith(TEXT(".c")) &&
+        !path.EndsWith(TEXT(".hpp")) &&
         !path.EndsWith(TEXT(".h"))) ||
         path.EndsWith(TEXT(".Gen.cs")))
+    {
         return;
+    }
 
     ScopeLock scopeLock(_locker);
     _lastSourceCodeEdited = DateTime::Now();

Source/Tools/Flax.Build/Bindings/BindingsGenerator.cs

@@ -127,7 +127,7 @@ namespace Flax.Build.Bindings
             var headerFiles = new List<string>(moduleOptions.SourceFiles.Count / 2);
             for (int i = 0; i < moduleOptions.SourceFiles.Count; i++)
             {
-                if (moduleOptions.SourceFiles[i].EndsWith(".h", StringComparison.OrdinalIgnoreCase))
+                if (moduleOptions.SourceFiles[i].EndsWith(".h", StringComparison.OrdinalIgnoreCase) || moduleOptions.SourceFiles[i].EndsWith(".hpp", StringComparison.OrdinalIgnoreCase))
                     headerFiles.Add(moduleOptions.SourceFiles[i]);
             }
             if (headerFiles.Count == 0)

Source/Tools/Flax.Build/Build/NativeCpp/Builder.NativeCpp.cs

@@ -482,7 +482,7 @@ namespace Flax.Build
                 var cppFiles = new List<string>(moduleOptions.SourceFiles.Count / 2);
                 for (int i = 0; i < moduleOptions.SourceFiles.Count; i++)
                 {
-                    if (moduleOptions.SourceFiles[i].EndsWith(".cpp", StringComparison.OrdinalIgnoreCase))
+                    if (moduleOptions.SourceFiles[i].EndsWith(".cpp", StringComparison.OrdinalIgnoreCase) || moduleOptions.SourceFiles[i].EndsWith(".c", StringComparison.OrdinalIgnoreCase))
                         cppFiles.Add(moduleOptions.SourceFiles[i]);
                 }
 

Source/Tools/Flax.Build/Deps/Dependencies/Wayland.cs

@@ -49,7 +49,7 @@ namespace Flax.Deps.Dependencies
                     foreach (var protocolPath in protocolFiles)
                     {
                         var headerFile = Path.ChangeExtension(Path.GetFileName(protocolPath), "h");
-                        var glueFile = Path.ChangeExtension(Path.GetFileName(protocolPath), "cpp");
+                        var glueFile = Path.ChangeExtension(Path.GetFileName(protocolPath), "c");
                         Utilities.Run("wayland-scanner", $"client-header {protocolPath} include/wayland/{headerFile}", null, dstPath, Utilities.RunOptions.DefaultTool);
                         Utilities.Run("wayland-scanner", $"private-code {protocolPath} {glueFile}", null, dstPath, Utilities.RunOptions.DefaultTool);
                     }

Source/Tools/Flax.Build/Platforms/Unix/UnixToolchain.cs

@@ -333,23 +333,6 @@ namespace Flax.Build.Platforms
             {
                 commonArgs.Add("-c");
                 commonArgs.Add("-pipe");
-                commonArgs.Add("-x");
-                commonArgs.Add("c++");
-
-                // C++ version
-                switch (compileEnvironment.CppVersion)
-                {
-                case CppVersion.Cpp14:
-                    commonArgs.Add("-std=c++14");
-                    break;
-                case CppVersion.Cpp17:
-                case CppVersion.Latest:
-                    commonArgs.Add("-std=c++17");
-                    break;
-                case CppVersion.Cpp20:
-                    commonArgs.Add("-std=c++20");
-                    break;
-                }
 
                 commonArgs.Add("-Wdelete-non-virtual-dtor");
                 commonArgs.Add("-fno-math-errno");
@@ -407,7 +390,7 @@ namespace Flax.Build.Platforms
                 commonArgs.Add(string.Format("-I\"{0}\"", includePath.Replace('\\', '/')));
             }
 
-            // Compile all C++ files
+            // Compile all C/C++ files
             var args = new List<string>();
             foreach (var sourceFile in sourceFiles)
             {
@@ -417,6 +400,30 @@ namespace Flax.Build.Platforms
                 // Use shared arguments
                 args.Clear();
                 args.AddRange(commonArgs);
+                
+                // Language for the file
+                args.Add("-x");
+                if (Path.GetExtension(sourceFile).Equals(".c", StringComparison.OrdinalIgnoreCase))
+                    args.Add("c");
+                else
+                {
+                    args.Add("c++");
+                    
+                    // C++ version
+                    switch (compileEnvironment.CppVersion)
+                    {
+                    case CppVersion.Cpp14:
+                        args.Add("-std=c++14");
+                        break;
+                    case CppVersion.Cpp17:
+                    case CppVersion.Latest:
+                        args.Add("-std=c++17");
+                        break;
+                    case CppVersion.Cpp20:
+                        args.Add("-std=c++20");
+                        break;
+                    }
+                }
 
                 // Object File Name
                 var objFile = Path.Combine(outputPath, sourceFilename + ".o");

Source/Tools/Flax.Build/Projects/VisualStudio/VCProjectGenerator.cs

@@ -241,11 +241,11 @@ namespace Flax.Build.Projects.VisualStudio
             foreach (var file in files)
             {
                 string fileType;
-                if (file.EndsWith(".h", StringComparison.OrdinalIgnoreCase) || file.EndsWith(".inl", StringComparison.OrdinalIgnoreCase))
+                if (file.EndsWith(".h", StringComparison.OrdinalIgnoreCase) || file.EndsWith(".inl", StringComparison.OrdinalIgnoreCase) || file.EndsWith(".hpp", StringComparison.OrdinalIgnoreCase))
                 {
                     fileType = "ClInclude";
                 }
-                else if (file.EndsWith(".cpp", StringComparison.OrdinalIgnoreCase) || file.EndsWith(".cc", StringComparison.OrdinalIgnoreCase))
+                else if (file.EndsWith(".cpp", StringComparison.OrdinalIgnoreCase) || file.EndsWith(".cc", StringComparison.OrdinalIgnoreCase) || file.EndsWith(".c", StringComparison.OrdinalIgnoreCase))
                 {
                     fileType = "ClCompile";
                 }