Index: Jenkinsfile
===================================================================
--- Jenkinsfile	(revision 26a09f92c3eb6297ecdaefb6eebf54e1623075a3)
+++ Jenkinsfile	(revision bf22bc6c1ba283a7b275b901fbe5b80e7c50f090)
@@ -126,5 +126,5 @@
 			}
 
-			sh "${SrcDir}/configure CXX=${Settings.Compiler.CXX} CC=${Settings.Compiler.CC} ${Settings.Architecture.flags} AR=gcc-ar RANLIB=gcc-ranlib CXXFLAGS='-flto=auto' CFAFLAGS='-flto=auto' ${targets} --quiet"
+			sh "${SrcDir}/configure CXX=${Settings.Compiler.CXX} CC=${Settings.Compiler.CC} ${Settings.Architecture.flags} AR=gcc-ar RANLIB=gcc-ranlib ${targets} --quiet"
 
 			// Configure libcfa
@@ -325,9 +325,11 @@
 	public String CXX
 	public String CC
-
-	CC_Desc(String name, String CXX, String CC) {
+	public String lto
+
+	CC_Desc(String name, String CXX, String CC, String lto) {
 		this.name = name
 		this.CXX = CXX
-		this.CC = CC
+		this.CC  = CC
+		this.lto = lto
 	}
 }
@@ -364,23 +366,23 @@
 		switch( param.Compiler ) {
 			case 'gcc-9':
-				this.Compiler = new CC_Desc('gcc-9', 'g++-9', 'gcc-9')
+				this.Compiler = new CC_Desc('gcc-9', 'g++-9', 'gcc-9', '-flto=auto')
 			break
 			case 'gcc-8':
-				this.Compiler = new CC_Desc('gcc-8', 'g++-8', 'gcc-8')
+				this.Compiler = new CC_Desc('gcc-8', 'g++-8', 'gcc-8', '-flto=auto')
 			break
 			case 'gcc-7':
-				this.Compiler = new CC_Desc('gcc-7', 'g++-7', 'gcc-7')
+				this.Compiler = new CC_Desc('gcc-7', 'g++-7', 'gcc-7', '-flto=auto')
 			break
 			case 'gcc-6':
-				this.Compiler = new CC_Desc('gcc-6', 'g++-6', 'gcc-6')
+				this.Compiler = new CC_Desc('gcc-6', 'g++-6', 'gcc-6', '-flto=auto')
 			break
 			case 'gcc-5':
-				this.Compiler = new CC_Desc('gcc-5', 'g++-5', 'gcc-5')
+				this.Compiler = new CC_Desc('gcc-5', 'g++-5', 'gcc-5', '-flto=auto')
 			break
 			case 'gcc-4.9':
-				this.Compiler = new CC_Desc('gcc-4.9', 'g++-4.9', 'gcc-4.9')
+				this.Compiler = new CC_Desc('gcc-4.9', 'g++-4.9', 'gcc-4.9', '-flto=auto')
 			break
 			case 'clang':
-				this.Compiler = new CC_Desc('clang', 'clang++-6.0', 'gcc-6')
+				this.Compiler = new CC_Desc('clang', 'clang++-6.0', 'gcc-6', '-flto=thin -flto-jobs=0')
 			break
 			default :