Put system pragmas at the top of the output file

src/parse/CppFileMerger.ts

@@ -31,8 +31,13 @@ export default class CppFileMerger {
       .sort((a, b) => a.localeCompare(b))
       .map(file => `#include <${file}>`)
       .join(EOL);
+	const systemPragmas = Array.from(this.parser.getSystemPragmas())
+	  .sort((a, b) => a.localeCompare(b))
+	  .map(setting => `#pragma ${setting}`)
+	  .join(EOL);
 
     const finalContent = [
+      systemPragmas,
       systemIncludesContent,
       content,
       sourceFilesContent

src/parse/CppFileParser.ts

@@ -11,6 +11,12 @@ export default class CppFileParser {
   private static readonly localIncludeRegExp = /^#include "([^"]+)"/;
   private static readonly systemIncludeRegExp = /^#include <([^>]+)>/;
   private static readonly pragmaOnceRegExp = /^#pragma once/;
+  private static readonly pragmaRegExp = /^#pragma (.+)/;
+  private systemPragmas = new Set<string>();
+
+  public getSystemPragmas(): Set<string> {
+    return this.systemPragmas;
+  }
 
   public parse(fileContent: string): ParseResult {
     const fileLines = fileContent.split(EOL);
@@ -26,6 +32,12 @@ export default class CppFileParser {
         continue;
       }
 
+	  const systemPragma = CppFileParser.pragmaRegExp.exec(line)?.[1];
+	  if (systemPragma) {
+		  this.systemPragmas.add(systemPragma);
+		  continue;
+	  }
+
       const systemInclude = CppFileParser.systemIncludeRegExp.exec(line)?.[1];
       if (systemInclude) {
         systemIncludes.add(systemInclude);