[GTK] Create launch configuration and recompile Linux binaries

The Linux binaries are now created via an Ant script executed via Maven.
This script calls "cmake ." and "make", and then overwrites the old
binaries with the ones that have just been created.

See eclipse-windowbuilder#871

org.eclipse.wb.os.linux/Build-native-linux-binaries.launch

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<launchConfiguration type="org.eclipse.m2e.Maven2LaunchConfigurationType">
+    <intAttribute key="M2_COLORS" value="0"/>
+    <booleanAttribute key="M2_DEBUG_OUTPUT" value="false"/>
+    <stringAttribute key="M2_GOALS" value="clean antrun:run@build-native-binaries"/>
+    <booleanAttribute key="M2_NON_RECURSIVE" value="true"/>
+    <booleanAttribute key="M2_OFFLINE" value="false"/>
+    <stringAttribute key="M2_PROFILES" value=""/>
+    <listAttribute key="M2_PROPERTIES"/>
+    <stringAttribute key="M2_RUNTIME" value="EMBEDDED"/>
+    <booleanAttribute key="M2_SKIP_TESTS" value="false"/>
+    <intAttribute key="M2_THREADS" value="1"/>
+    <booleanAttribute key="M2_UPDATE_SNAPSHOTS" value="false"/>
+    <stringAttribute key="M2_USER_SETTINGS" value=""/>
+    <booleanAttribute key="M2_WORKSPACE_RESOLUTION" value="false"/>
+    <booleanAttribute key="org.eclipse.debug.core.ATTR_FORCE_SYSTEM_CONSOLE_ENCODING" value="false"/>
+    <booleanAttribute key="org.eclipse.jdt.launching.ATTR_ATTR_USE_ARGFILE" value="false"/>
+    <booleanAttribute key="org.eclipse.jdt.launching.ATTR_SHOW_CODEDETAILS_IN_EXCEPTION_MESSAGES" value="true"/>
+    <booleanAttribute key="org.eclipse.jdt.launching.ATTR_USE_CLASSPATH_ONLY_JAR" value="false"/>
+    <stringAttribute key="org.eclipse.jdt.launching.WORKING_DIRECTORY" value="${git_work_tree:org.eclipse.wb.os.linux}/"/>
+</launchConfiguration>

pom.xml

@@ -179,6 +179,58 @@
             </execution>
           </executions>
         </plugin>
+
+        <plugin>
+          <artifactId>maven-antrun-plugin</artifactId>
+          <executions>
+            <execution>
+              <id>build-native-binaries</id>
+              <goals>
+                <goal>run</goal>
+              </goals>
+              <configuration>
+                <target>
+                  <taskdef resource="net/sf/antcontrib/antlib.xml"/>
+                  <echo>Generating native binaries for os=${os.name}</echo>
+                  <if><equals arg1="${os.name}" arg2="Linux" />
+                    <then>
+                      <property name="gtk.so.file" value="libwbp3.so"/>
+                      <property name="gtk.src.dir" value="${project.basedir}/org.eclipse.wb.os.linux/"/>
+                      <property name="gtk.build.dir" value="${project.build.directory}/gtk-tmp"/>
+                      <property name="gtk3.build.dir" value="${gtk.build.dir}/gtk3"/>
+                      <copy todir="${gtk.build.dir}">
+                        <fileset dir="${gtk.src.dir}/native/gtk"/>
+                      </copy>
+                      <echo>Create build files</echo>
+                      <exec dir="${gtk3.build.dir}" executable="cmake" failonerror="true">
+                        <arg line="."/>
+                      </exec>
+                      <echo>Create "shared object" file</echo>
+                      <exec dir="${gtk3.build.dir}" executable="make" failonerror="true" />
+                      <echo>Copy "shared object" to fragment</echo>
+                      <copy todir="${gtk.src.dir}/os/linux/x86_64">
+                        <fileset dir="${gtk3.build.dir}" includes="${gtk.so.file}"/>
+                      </copy>
+                    </then>
+                  </if>
+                </target>
+              </configuration>
+            </execution>
+          </executions>
+          <dependencies>
+            <dependency>
+              <groupId>ant-contrib</groupId>
+              <artifactId>ant-contrib</artifactId>
+              <version>1.0b3</version>
+              <exclusions>
+                <exclusion>
+                  <groupId>ant</groupId>
+                  <artifactId>ant</artifactId>
+                </exclusion>
+              </exclusions>
+            </dependency>
+          </dependencies>
+        </plugin>
       </plugins>
     </pluginManagement>
     <plugins>