Index: apache-tomcat-9.0.17-src/build.xml
===================================================================
--- apache-tomcat-9.0.17-src.orig/build.xml
+++ apache-tomcat-9.0.17-src/build.xml
@@ -1811,10 +1811,11 @@ Apache Tomcat ${version} native binaries
       encoding="UTF-8"
       docencoding="UTF-8"
       charset="UTF-8"
+      source="${compile.source}"
       additionalparam="-breakiterator -notimestamp"
       maxmemory="512m"
       failonerror="true"
-      failonwarning="true">
+      failonwarning="false">
       <classpath>
         <path refid="compile.classpath"/>
         <path location="${ant.core.lib}"/>
@@ -1830,11 +1831,12 @@ Apache Tomcat ${version} native binaries
       bottom="Copyright &amp;#169; 2000-${year} Apache Software Foundation. All Rights Reserved."
       encoding="UTF-8"
       docencoding="UTF-8"
+      source="${compile.source}"
       charset="UTF-8"
       additionalparam="-breakiterator -notimestamp"
       maxmemory="512m"
       failonerror="true"
-      failonwarning="true">
+      failonwarning="false">
       <classpath>
         <path refid="compile.classpath"/>
         <path location="${ant.core.lib}"/>
@@ -1851,10 +1853,11 @@ Apache Tomcat ${version} native binaries
       encoding="UTF-8"
       docencoding="UTF-8"
       charset="UTF-8"
+      source="${compile.source}"
       additionalparam="-breakiterator -notimestamp"
       maxmemory="512m"
       failonerror="true"
-      failonwarning="true">
+      failonwarning="false">
       <classpath>
         <path refid="compile.classpath"/>
         <path location="${ant.core.lib}"/>
@@ -1871,10 +1874,11 @@ Apache Tomcat ${version} native binaries
       encoding="UTF-8"
       docencoding="UTF-8"
       charset="UTF-8"
+      source="${compile.source}"
       additionalparam="-breakiterator -notimestamp"
       maxmemory="512m"
       failonerror="true"
-      failonwarning="true">
+      failonwarning="false">
       <classpath>
         <path refid="compile.classpath"/>
         <path location="${ant.core.lib}"/>
@@ -1890,10 +1894,11 @@ Apache Tomcat ${version} native binaries
       encoding="UTF-8"
       docencoding="UTF-8"
       charset="UTF-8"
-      additionalparam="-breakiterator -notimestamp ${java9.add.modules}"
+      source="${compile.source}"
+      additionalparam="-breakiterator -notimestamp"
       maxmemory="512m"
       failonerror="true"
-      failonwarning="true">
+      failonwarning="false">
       <classpath>
         <path refid="compile.classpath"/>
         <path location="${ant.core.lib}"/>
@@ -1902,9 +1907,6 @@ Apache Tomcat ${version} native binaries
       <link href="../jspapi"/>
       <link href="../elapi"/>
       <link href="../websocketapi"/>
-      <link href="http://docs.oracle.com/javase/8/docs/api/"/>
-      <link href="https://commons.apache.org/proper/commons-io/javadocs/api-release/"/>
-      <link href="https://javaee.github.io/javaee-spec/javadocs/"/>
       <packageset dir="${tomcat.dist}/src/java/">
         <include name="org/**"/>
         <exclude name="org/apache/el/parser/**"/>