Bug 1417 - Android: Complete 1st round: make/lib/gluegen-cpptask-android-<abi>.xml and scripts

All aligned now
- gluegen-cpptasks-android-aarch64.xml
- gluegen-cpptasks-android-armv6.xml (this has ld flag --no-undefined disabled, due to internal missing symbols)
- gluegen-cpptasks-android-x86.xml

7 files changed, 199 insertions, 197 deletions

diff --git a/make/lib/gluegen-cpptasks-android-aarch64.xml b/make/lib/gluegen-cpptasks-android-aarch64.xml
index 4b6401b..2ebe9ee 100644
--- a/make/lib/gluegen-cpptasks-android-aarch64.xml
+++ b/make/lib/gluegen-cpptasks-android-aarch64.xml
@@ -35,18 +35,17 @@
     <compiler id="compiler.cfg.android" name="clang">
       <compilerarg value="--sysroot=${env.ANDROID_TOOLCHAIN_SYSROOT}" />
 
-      <!-- compilerarg value="-v" / --> 
+      <compilerarg value="-v" /> 
 
       <compilerarg value="-fpic" /> 
-      <!-- compilerarg value="-fPIE" / -->  <!-- not for shared libs, won't produce symbols -->
-      <!-- compilerarg value="-pie" / -->   <!-- not for shared libs, won't produce symbols -->
 
       <!-- from sdk cmake start -->
       <compilerarg value="-fdata-sections" />
       <compilerarg value="-ffunction-sections" />
       <compilerarg value="-funwind-tables" />
       <compilerarg value="-fstack-protector-strong" />
-      <!-- compilerarg value="-no-canonical-prefixes" / --> <!-- will disallow creating shared library -->
+      <compilerarg value="-no-canonical-prefixes" />
+      <compilerarg value="-nostdinc++" />
       <!-- from sdk cmake end -->
 
       <compilerarg value="-Wa,--noexecstack" /> 
@@ -59,25 +58,21 @@
       <!-- compilerarg value="-mfloat-abi=softfp" / -->
 
       <!-- Generic ARM Flags -->
+      <compilerarg value="-fno-strict-aliasing"/> <!-- be safe -->
+
       <compilerarg value="-O2"                  unless="c.compiler.use-debug" /> 
       <!-- compilerarg value="-g"                   unless="c.compiler.use-debug" / -->
       <compilerarg value="-fomit-frame-pointer" unless="c.compiler.use-debug"/> 
-      <compilerarg value="-fstrict-aliasing"    unless="c.compiler.use-debug"/> 
       <!-- compilerarg value="-funswitch-loops"     unless="c.compiler.use-debug"/ not supported --> 
       <!-- compilerarg value="-finline-limit=300"   unless="c.compiler.use-debug"/ not supported --> 
 
       <compilerarg value="-O0"                     if="c.compiler.use-debug" />
       <compilerarg value="-g"                      if="c.compiler.use-debug" />
       <compilerarg value="-fno-omit-frame-pointer" if="c.compiler.use-debug" /> 
-      <compilerarg value="-fno-strict-aliasing"    if="c.compiler.use-debug" /> 
 
       <!-- includepath path="${env.ANDROID_TOOLCHAIN_SYSROOT_INC}" / -->
       <defineset>
         <define name="__unix__" />
-        <!-- define name="__ARM_ARCH_5__" />
-        <define name="__ARM_ARCH_5T__" />
-        <define name="__ARM_ARCH_5E__" />
-        <define name="__ARM_ARCH_5TE__" / -->
         <define name="__LP64__" />     <!-- default pre-defined macro for 64bit unix -->
         <define name="__aarch64__" />  <!-- default pre-defined macro for armv8-a, 64bit -->
 
@@ -90,39 +85,36 @@
 
     <linker id="linker.cfg.android" name="clang">
       <linkerarg value="--sysroot=${env.ANDROID_TOOLCHAIN_SYSROOT}" />
-      <!-- linkerarg value="-Wl,-L,${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_0}" / -->
-      <linkerarg value="-Wl,-L,${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
+      <!-- linkerarg value="-L${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_0}" / -->
+      <linkerarg value="-L${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
+      <linkerarg value="-Wl,-rpath-link=${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
       
-      <!-- linkerarg value="-v" / --> 
+      <linkerarg value="-v" /> 
 
       <linkerarg value="-fpic" /> 
-      <!-- linkerarg value="-fPIE" / --> <!-- not for shared libs, won't produce symbols -->
-      <!-- linkerarg value="-pie" / -->  <!-- not for shared libs, won't produce symbols -->
-      <!-- linkerarg value="-no-canonical-prefixes" / --> <!-- will disallow creating shared library -->
 
       <!-- from sdk cmake start -->
       <linkerarg value="-Wl,--build-id" /> 
-      <linkerarg value="-Wl,--warn-shared-textrel" /> 
-      <!-- linkerarg value="-Wl,- -fatal-warnings" / --> 
+      <!-- linkerarg value="-Wl,- -no-warn-shared-textrel" / unrecognized option -->  
+      <linkerarg value="-Wl,--fatal-warnings" />
+      <linkerarg value="-nostdlib" />
+      <linkerarg value="-nostdlib++" />
       <!-- from sdk cmake end -->
 
       <linkerarg value="-fno-use-linker-plugin" /> 
 
+      <linkerarg value="-target" />
+      <linkerarg value="${env.ANDROID_LLVM_TRIPLE}" /> <!-- aarch64-none-linux-android -->
       <!-- linkerarg value="-mabi=lp64" />
       <linkerarg value="-mlittle-endian" />
       <linkerarg value="-march=armv8-a" / -->
       <!-- linkerarg value="-mfloat-abi=softfp" / -->
 
-      <linkerarg value="-nostdlib" />
       <linkerarg value="-Bdynamic" />
       <linkerarg value="-Wl,-dynamic-linker,/system/bin/linker" />
       <linkerarg value="-Wl,-z,nocopyreloc" />
 
-      <linkerarg value="--demangle" /> 
-      <linkerarg value="--gc-sections" /> 
-      <linkerarg value="--no-undefined" /> 
-      <linkerarg value="-static-libgcc" if="isGCC"/>
-      <linkerarg value="-static-libstdc++" if="isGCC"/>
+      <linkerarg value="--no-undefined" />
 
       <!-- libset libs="c,m,dl,log" / -->
       <libset libs="c,m,dl" />
@@ -136,16 +128,16 @@
   <property name="linker.cfg.id.base"            value="linker.cfg.android" /> 
   <property name="java.includes.dir.platform"    value="${java.includes.dir}/x11" />
   <available property="java.lib.dir.platform"    value="${java.home.dir}/jre/lib/i386" 
-                                                  file="${java.home.dir}/jre/lib/i386/libjava.so"/>
+                                                 file="${java.home.dir}/jre/lib/i386/libjava.so"/>
   <available property="java.lib.dir.platform"    value="${java.home.dir}/lib/i386"     
-                                                  file="${java.home.dir}/lib/i386/libjava.so"/>
+                                                 file="${java.home.dir}/lib/i386/libjava.so"/>
   <property name="java.lib.dir.platform"         value="${java.home.dir}/lib"/> <!-- new default -->
 </target>
 
 <target name="declare.linux.android">
-      <echo message="android.arm" />
-      <property name="compiler.cfg.id"                      value="compiler.cfg.android" />
-      <property name="linker.cfg.id"                        value="linker.cfg.android" />
+  <echo message="android.${env.ANDROID_ABI}" />
+  <property name="compiler.cfg.id"               value="compiler.cfg.android" />
+  <property name="linker.cfg.id"                 value="linker.cfg.android" />
 </target>
 
 </project>
diff --git a/make/lib/gluegen-cpptasks-android-armv6.xml b/make/lib/gluegen-cpptasks-android-armv6.xml
index 738c70d..4e211c8 100644
--- a/make/lib/gluegen-cpptasks-android-armv6.xml
+++ b/make/lib/gluegen-cpptasks-android-armv6.xml
@@ -23,7 +23,7 @@
     <property name="isAndroidARMv6"                   value="true" /> 
     <property name="jvmDataModel.arg"                 value="-Djnlp.no.jvm.data.model.set=true" /> 
     <property name="isCrosscompilation"               value="true" />
-    <property name="android.abi"                      value="armeabi" />
+    <property name="android.abi"                      value="${env.ANDROID_ABI}" /> <!-- armeabi-v7a -->
     <property name="isAbiEabiGnuArmel"                value="true" />
     <echo message="gluegen.cpptasks.detect.os.custom: GLUEGEN_CPPTASKS_FILE 'gluegen-cpptasks-android-armv6' done"/>
 </target>
@@ -32,53 +32,52 @@
 
 <target name="gluegen.cpptasks.configure.compiler" depends="setup.java.home.dir,declare.linux.android">
     <echo message="Custom forced compiler Android NDK, linker.cfg.android" />
-    <compiler id="compiler.cfg.android" name="gcc">
-      <compilerarg value="--sysroot=${TARGET_PLATFORM_SYSROOT}" />
-      <!-- The default search dirs for 'gcc from $NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin will not find
-        subprograms properly (see gcc -print-search-dirs). Not sure if this is a bug in the NDK
-        or not. Need to explicitly indicate where subprograms are with -B.
-        NOTE: This is not necessary if using '$TARGET_TRIPLE-gcc' from $NDK_TOOLCHAIN_ROOT/bin. -->
-      <compilerarg value="-B${env.NDK_TOOLCHAIN_ROOT}/libexec/gcc/${env.TARGET_TRIPLE}/${env.GCC_VERSION}" />
+    <compiler id="compiler.cfg.android" name="clang">
+      <compilerarg value="--sysroot=${env.ANDROID_TOOLCHAIN_SYSROOT}" />
+
+      <compilerarg value="-v" /> 
 
       <compilerarg value="-fpic" /> 
+
+      <!-- from sdk cmake start -->
+      <compilerarg value="-fdata-sections" />
       <compilerarg value="-ffunction-sections" />
       <compilerarg value="-funwind-tables" />
-      <compilerarg value="-fstack-protector" />
-      <!-- compilerarg value="-no-canonical-prefixes" / --> <!-- will disallow creating shared library -->
+      <compilerarg value="-fstack-protector-strong" />
+      <compilerarg value="-no-canonical-prefixes" />
+      <compilerarg value="-nostdinc++" />
+      <!-- from sdk cmake end -->
+
       <compilerarg value="-Wa,--noexecstack" /> 
 
-      <compilerarg value="-march=armv6" />
+      <compilerarg value="-target" />
+      <compilerarg value="${env.ANDROID_LLVM_TRIPLE}" /> <!-- armv7-none-linux-androideabi -->
+      <compilerarg value="-mfpu=neon" /> <!-- with NEON by default since NDK r21 -->
+      <!-- compilerarg value="-march=armv6" />
       <compilerarg value="-mfloat-abi=softfp" />
-      <compilerarg value="-marm" /> 
+      <compilerarg value="-marm" / -->
 
       <!-- Generic ARM Flags -->
+      <compilerarg value="-fno-strict-aliasing"/> <!-- be safe -->
+
       <compilerarg value="-O2"                  unless="c.compiler.use-debug" /> 
       <!-- compilerarg value="-g"                   unless="c.compiler.use-debug" /-->
       <compilerarg value="-fomit-frame-pointer" unless="c.compiler.use-debug"/> 
-      <compilerarg value="-fstrict-aliasing"    unless="c.compiler.use-debug"/> 
-      <compilerarg value="-funswitch-loops"     unless="c.compiler.use-debug"/> 
-      <compilerarg value="-finline-limit=300"   unless="c.compiler.use-debug"/> 
-
-      <!-- THUMB Flags ..
-      <compilerarg value="-Os"                  unless="c.compiler.use-debug" /> 
-      <compilerarg value="-g"                   unless="c.compiler.use-debug" />
-      <compilerarg value="-fomit-frame-pointer" unless="c.compiler.use-debug"/> 
-      <compilerarg value="-fno-strict-aliasing" unless="c.compiler.use-debug" /> 
-      <compilerarg value="-finline-limit=64"    unless="c.compiler.use-debug"/> 
-         -->
+      <!-- compilerarg value="-funswitch-loops"     unless="c.compiler.use-debug"/ not supported --> 
+      <!-- compilerarg value="-finline-limit=300"   unless="c.compiler.use-debug"/ not supported --> 
 
       <compilerarg value="-O0"                     if="c.compiler.use-debug" />
       <compilerarg value="-g"                      if="c.compiler.use-debug" />
       <compilerarg value="-fno-omit-frame-pointer" if="c.compiler.use-debug" /> 
-      <compilerarg value="-fno-strict-aliasing"    if="c.compiler.use-debug" /> 
 
-      <includepath path="${env.NDK_TOOLCHAIN_ROOT}/lib/gcc/${env.TARGET_TRIPLE}/${env.GCC_VERSION}/include" /> <!-- for stdarg.h -->
+      <!-- includepath path="${env.ANDROID_TOOLCHAIN_SYSROOT_INC}" / -->
       <defineset>
         <define name="__unix__" />
         <define name="__ARM_ARCH_5__" />
         <define name="__ARM_ARCH_5T__" />
         <define name="__ARM_ARCH_5E__" />
         <define name="__ARM_ARCH_5TE__" />
+        <define name="HAVE_NEON" />
         <define name="ANDROID" />
         <define name="_DEBUG"   if="c.compiler.use-debug"/>        
         <define name="DEBUG"    if="c.compiler.use-debug"/>        
@@ -86,40 +85,42 @@
       </defineset>
     </compiler>
 
-    <linker id="linker.cfg.android" name="gcc">
-         <linkerarg value="--sysroot=${TARGET_PLATFORM_SYSROOT}" />
-
-         <linkerarg value="-fpic" /> 
-         <linkerarg value="-ffunction-sections" />
-         <linkerarg value="-funwind-tables" />
-         <linkerarg value="-fstack-protector" />
-         <!-- linkerarg value="-no-canonical-prefixes" / --> <!-- will disallow creating shared library -->
-         <linkerarg value="-Wa,--noexecstack" /> 
-
-         <linkerarg value="-fno-use-linker-plugin" /> 
-
-         <linkerarg value="-march=armv6" />
-         <linkerarg value="-mfloat-abi=softfp" />
-         <linkerarg value="-marm" /> 
-
-         <linkerarg value="-nostdlib" />
-         <linkerarg value="-Bdynamic" />
-         <linkerarg value="-Wl,-dynamic-linker,/system/bin/linker" />
-         <linkerarg value="-Wl,-z,nocopyreloc" />
-
-         <linkerarg value="--demangle" /> 
-         <linkerarg value="--gc-sections" /> 
-         <linkerarg value="--no-undefined" /> 
-         <linkerarg value="-static-libgcc" if="isGCC"/>
-         <linkerarg value="-static-libstdc++" if="isGCC"/>
-         <!-- The gcc from $NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin needs to be told
-           where to find libgcc as the default location (gcc -print-search-dirs)
-           is not correct. Not sure if this is a bug in the NDK or not. We also
-           enforce that libgcc is linked after source files but before other shared
-           libraries. -->
-         <libset dir="${env.NDK_TOOLCHAIN_ROOT}/lib/gcc/${env.TARGET_TRIPLE}/${env.GCC_VERSION}" libs="gcc" />
-         <!-- libset libs="c,m,dl,log" / -->
-         <libset libs="c,m,dl" />
+    <linker id="linker.cfg.android" name="clang">
+      <linkerarg value="--sysroot=${env.ANDROID_TOOLCHAIN_SYSROOT}" />
+      <!-- linkerarg value="-L${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_0}" / -->
+      <linkerarg value="-L${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
+      <linkerarg value="-Wl,-rpath-link=${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
+      
+      <linkerarg value="-v" /> 
+
+      <linkerarg value="-fpic" /> 
+
+      <!-- from sdk cmake start -->
+      <linkerarg value="-Wl,--build-id" /> 
+      <linkerarg value="-Wl,--no-warn-shared-textrel" /> 
+      <linkerarg value="-Wl,--fatal-warnings" />
+      <linkerarg value="-nostdlib" />
+      <linkerarg value="-nostdlib++" />
+      <!-- from sdk cmake end -->
+
+      <linkerarg value="-fno-use-linker-plugin" /> 
+
+      <linkerarg value="-target" />
+      <linkerarg value="${env.ANDROID_LLVM_TRIPLE}" /> <!-- armv7-none-linux-androideabi -->
+      <linkerarg value="-mfpu=neon" /> <!-- with NEON by default since NDK r21 -->
+      <!--
+      <linkerarg value="-march=armv6" />
+      <linkerarg value="-mfloat-abi=softfp" />
+      <linkerarg value="-marm" />  -->
+
+      <linkerarg value="-Bdynamic" />
+      <linkerarg value="-Wl,-dynamic-linker,/system/bin/linker" />
+      <linkerarg value="-Wl,-z,nocopyreloc" />
+
+      <!-- linkerarg value="- -no-undefined" / -->
+
+      <!-- libset libs="c,m,dl,log" / -->
+      <libset libs="c,m,dl" />
     </linker>
 
 </target>
@@ -130,16 +131,16 @@
   <property name="linker.cfg.id.base"            value="linker.cfg.android" /> 
   <property name="java.includes.dir.platform"    value="${java.includes.dir}/x11" />
   <available property="java.lib.dir.platform"    value="${java.home.dir}/jre/lib/i386" 
-                                                  file="${java.home.dir}/jre/lib/i386/libjava.so"/>
+                                                 file="${java.home.dir}/jre/lib/i386/libjava.so"/>
   <available property="java.lib.dir.platform"    value="${java.home.dir}/lib/i386"     
-                                                  file="${java.home.dir}/lib/i386/libjava.so"/>
+                                                 file="${java.home.dir}/lib/i386/libjava.so"/>
   <property name="java.lib.dir.platform"         value="${java.home.dir}/lib"/> <!-- new default -->
 </target>
 
 <target name="declare.linux.android">
-      <echo message="android.arm" />
-      <property name="compiler.cfg.id"                      value="compiler.cfg.android" />
-      <property name="linker.cfg.id"                        value="linker.cfg.android" />
+  <echo message="android.${env.ANDROID_ABI}" />
+  <property name="compiler.cfg.id"               value="compiler.cfg.android" />
+  <property name="linker.cfg.id"                 value="linker.cfg.android" />
 </target>
 
 </project>
diff --git a/make/lib/gluegen-cpptasks-android-x86.xml b/make/lib/gluegen-cpptasks-android-x86.xml
index 7fbd44e..bcdc76c 100644
--- a/make/lib/gluegen-cpptasks-android-x86.xml
+++ b/make/lib/gluegen-cpptasks-android-x86.xml
@@ -23,7 +23,7 @@
     <property name="isAndroidX86"                     value="true" /> 
     <property name="jvmDataModel.arg"                 value="-Djnlp.no.jvm.data.model.set=true" /> 
     <property name="isCrosscompilation"               value="true" />
-    <property name="android.abi"                      value="x86" />
+    <property name="android.abi"                      value="${env.ANDROID_ABI}" /> <!-- x86 -->
     <echo message="gluegen.cpptasks.detect.os.custom: GLUEGEN_CPPTASKS_FILE 'gluegen-cpptasks-android-x86' done"/>
 </target>
 
@@ -31,42 +31,45 @@
 
 <target name="gluegen.cpptasks.configure.compiler" depends="setup.java.home.dir,declare.linux.android">
     <echo message="Custom forced compiler Android NDK, linker.cfg.android" />
-    <compiler id="compiler.cfg.android" name="gcc">
-      <compilerarg value="--sysroot=${TARGET_PLATFORM_SYSROOT}" />
-      <!-- The default search dirs for 'gcc from $NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin will not find
-        subprograms properly (see gcc -print-search-dirs). Not sure if this is a bug in the NDK
-        or not. Need to explicitly indicate where subprograms are with -B.
-        NOTE: This is not necessary if using '$TARGET_TRIPLE-gcc' from $NDK_TOOLCHAIN_ROOT/bin. -->
-      <compilerarg value="-B${env.NDK_TOOLCHAIN_ROOT}/libexec/gcc/${env.TARGET_TRIPLE}/${env.GCC_VERSION}" />
+    <compiler id="compiler.cfg.android" name="clang">
+      <compilerarg value="--sysroot=${env.ANDROID_TOOLCHAIN_SYSROOT}" />
+
+      <compilerarg value="-v" /> 
 
       <compilerarg value="-fpic" /> 
-      <!-- compilerarg value="-fPIE" / -->  <!-- not for shared libs, won't produce symbols -->
-      <!-- compilerarg value="-pie" / -->   <!-- not for shared libs, won't produce symbols -->
+
+      <!-- from sdk cmake start -->
+      <compilerarg value="-fdata-sections" />
       <compilerarg value="-ffunction-sections" />
       <compilerarg value="-funwind-tables" />
-      <compilerarg value="-fno-stack-protector" />
-      <!-- compilerarg value="-no-canonical-prefixes" / --> <!-- will disallow creating shared library -->
+      <compilerarg value="-fstack-protector-strong" />
+      <compilerarg value="-no-canonical-prefixes" />
+      <compilerarg value="-nostdinc++" />
+      <!-- from sdk cmake end -->
+
       <compilerarg value="-Wa,--noexecstack" /> 
 
-      <compilerarg value="-mtune=atom" />
+      <compilerarg value="-target" />
+      <compilerarg value="${env.ANDROID_LLVM_TRIPLE}" /> <!-- i686-none-linux-android -->
+      <!-- compilerarg value="-mtune=atom" />
       <compilerarg value="-mssse3" />
       <compilerarg value="-mfpmath=sse" />
-      <compilerarg value="-mlong-double-80" />
+      <compilerarg value="-mlong-double-80" / -->
 
       <!-- Generic Flags -->
+      <compilerarg value="-fno-strict-aliasing"/> <!-- be safe -->
+
       <compilerarg value="-O2"                  unless="c.compiler.use-debug" /> 
       <!-- compilerarg value="-g"                   unless="c.compiler.use-debug" / -->
       <compilerarg value="-fomit-frame-pointer" unless="c.compiler.use-debug"/> 
-      <compilerarg value="-fno-strict-aliasing"    unless="c.compiler.use-debug"/> 
-      <compilerarg value="-funswitch-loops"     unless="c.compiler.use-debug"/> 
-      <compilerarg value="-finline-limit=300"   unless="c.compiler.use-debug"/> 
+      <!-- compilerarg value="-funswitch-loops"     unless="c.compiler.use-debug"/ not supported --> 
+      <!-- compilerarg value="-finline-limit=300"   unless="c.compiler.use-debug"/ not supported --> 
 
       <compilerarg value="-O0"                     if="c.compiler.use-debug" />
       <compilerarg value="-g"                      if="c.compiler.use-debug" />
       <compilerarg value="-fno-omit-frame-pointer" if="c.compiler.use-debug" /> 
-      <compilerarg value="-fno-strict-aliasing"    if="c.compiler.use-debug" /> 
 
-      <includepath path="${env.NDK_TOOLCHAIN_ROOT}/lib/gcc/${env.TARGET_TRIPLE}/${env.GCC_VERSION}/include" /> <!-- for stdarg.h -->
+      <!-- includepath path="${env.ANDROID_TOOLCHAIN_SYSROOT_INC}" / -->
       <defineset>
         <define name="__unix__" />
 
@@ -77,38 +80,41 @@
       </defineset>
     </compiler>
 
-    <linker id="linker.cfg.android" name="gcc">
-         <linkerarg value="--sysroot=${TARGET_PLATFORM_SYSROOT}" />
-
-         <linkerarg value="-fpic" /> 
-         <!-- linkerarg value="-fPIE" / --> <!-- not for shared libs, won't produce symbols -->
-         <!-- linkerarg value="-pie" / -->  <!-- not for shared libs, won't produce symbols -->
-         <!-- linkerarg value="-no-canonical-prefixes" / --> <!-- will disallow creating shared library -->
-
-         <linkerarg value="-fno-use-linker-plugin" /> 
-
-         <linkerarg value="-mtune=atom" />
-         <linkerarg value="-mssse3" />
-         <linkerarg value="-mfpmath=sse" />
-         <linkerarg value="-mlong-double-80" />
-
-         <linkerarg value="-nostdlib" />
-         <linkerarg value="-Bdynamic" />
-         <linkerarg value="-Wl,-dynamic-linker,/system/bin/linker" />
-         <linkerarg value="-Wl,-z,nocopyreloc" />
-
-         <linkerarg value="--demangle" /> 
-         <linkerarg value="--gc-sections" /> 
-         <linkerarg value="--no-undefined" /> 
-         <linkerarg value="-static-libgcc"/>
-         <!-- The gcc from $NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin needs to be told
-           where to find libgcc as the default location (gcc -print-search-dirs)
-           is not correct. Not sure if this is a bug in the NDK or not. We also
-           enforce that libgcc is linked after source files but before other shared
-           libraries. -->
-         <libset dir="${env.NDK_TOOLCHAIN_ROOT}/lib/gcc/${env.TARGET_TRIPLE}/${env.GCC_VERSION}" libs="gcc" />
-         <!-- libset libs="c,m,dl,log" / -->
-         <libset libs="c,m,dl" />
+    <linker id="linker.cfg.android" name="clang">
+      <linkerarg value="--sysroot=${env.ANDROID_TOOLCHAIN_SYSROOT}" />
+      <!-- linkerarg value="-L${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_0}" / -->
+      <linkerarg value="-L${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
+      <linkerarg value="-Wl,-rpath-link=${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
+      
+      <linkerarg value="-v" /> 
+
+      <linkerarg value="-fpic" /> 
+
+      <!-- from sdk cmake start -->
+      <linkerarg value="-Wl,--build-id" /> 
+      <linkerarg value="-Wl,--no-warn-shared-textrel" /> 
+      <linkerarg value="-Wl,--fatal-warnings" />
+      <linkerarg value="-nostdlib" />
+      <linkerarg value="-nostdlib++" />
+      <!-- from sdk cmake end -->
+
+      <linkerarg value="-fno-use-linker-plugin" /> 
+
+      <linkerarg value="-target" />
+      <linkerarg value="${env.ANDROID_LLVM_TRIPLE}" /> <!-- i686-none-linux-android -->
+      <!-- linkerarg value="-mtune=atom" />
+      <linkerarg value="-mssse3" />
+      <linkerarg value="-mfpmath=sse" />
+      <linkerarg value="-mlong-double-80" / -->
+
+      <linkerarg value="-Bdynamic" />
+      <linkerarg value="-Wl,-dynamic-linker,/system/bin/linker" />
+      <linkerarg value="-Wl,-z,nocopyreloc" />
+
+      <linkerarg value="--no-undefined" />
+
+      <!-- libset libs="c,m,dl,log" / -->
+      <libset libs="c,m,dl" />
     </linker>
 
 </target>
@@ -117,18 +123,18 @@
   <echo message="Custom forced Linux.x86 cross compile android" />
   <property name="compiler.cfg.id.base"          value="compiler.cfg.android" /> 
   <property name="linker.cfg.id.base"            value="linker.cfg.android" /> 
-  <property name="java.includes.dir.platform"    value="${java.includes.dir}/linux" />
+  <property name="java.includes.dir.platform"    value="${java.includes.dir}/x11" />
   <available property="java.lib.dir.platform"    value="${java.home.dir}/jre/lib/i386" 
-                                                  file="${java.home.dir}/jre/lib/i386/libjava.so"/>
+                                                 file="${java.home.dir}/jre/lib/i386/libjava.so"/>
   <available property="java.lib.dir.platform"    value="${java.home.dir}/lib/i386"     
-                                                  file="${java.home.dir}/lib/i386/libjava.so"/>
+                                                 file="${java.home.dir}/lib/i386/libjava.so"/>
   <property name="java.lib.dir.platform"         value="${java.home.dir}/lib"/> <!-- new default -->
 </target>
 
 <target name="declare.linux.android">
-      <echo message="android.x86" />
-      <property name="compiler.cfg.id"                      value="compiler.cfg.android" />
-      <property name="linker.cfg.id"                        value="linker.cfg.android" />
+  <echo message="android.${env.ANDROID_ABI}" />
+  <property name="compiler.cfg.id"               value="compiler.cfg.android" />
+  <property name="linker.cfg.id"                 value="linker.cfg.android" />
 </target>
 
 </project>
diff --git a/make/scripts/make.gluegen.all.android-armv6-cross.sh b/make/scripts/make.gluegen.all.android-armv6-cross.sh
index 89161c6..ebbd84c 100755
--- a/make/scripts/make.gluegen.all.android-armv6-cross.sh
+++ b/make/scripts/make.gluegen.all.android-armv6-cross.sh
@@ -2,14 +2,30 @@
 
 SDIR=`dirname $0` 
 
-if [ -e $SDIR/setenv-build-jogamp-x86_64.sh ] ; then
-    . $SDIR/setenv-build-jogamp-x86_64.sh
+if [ -e ${SDIR}/setenv-build-jogamp-x86_64.sh ] ; then
+    . ${SDIR}/setenv-build-jogamp-x86_64.sh
 fi
 
-if [ -e $SDIR/setenv-android-tools.sh ] ; then
-    . $SDIR/setenv-android-tools.sh
+LOGF=make.gluegen.all.android-armv6-cross.log
+rm -f ${LOGF}
+
+export ANDROID_HOME=/opt-linux-x86_64/android-sdk-linux_x86_64
+export ANDROID_API_LEVEL=24
+export ANDROID_HOST_TAG=linux-x86_64
+export ANDROID_ABI=armeabi-v7a
+
+if [ -e ${SDIR}/setenv-android-tools.sh ] ; then
+    . ${SDIR}/setenv-android-tools.sh >> $LOGF 2>&1
+else
+    echo "${SDIR}/setenv-android-tools.sh doesn't exist!" 2>&1 | tee -a ${LOGF}
+    exit 1
 fi
 
+export GLUEGEN_CPPTASKS_FILE="lib/gluegen-cpptasks-android-armv6.xml"
+export PATH=${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_NAME}/bin:${ANDROID_TOOLCHAIN_ROOT}/bin:${ANDROID_HOME}/platform-tools:${ANDROID_BUILDTOOLS_ROOT}:${PATH}
+echo PATH ${PATH} 2>&1 | tee -a ${LOGF}
+echo clang `which clang` 2>&1 | tee -a ${LOGF}
+
 export NODE_LABEL=.
 
 export HOST_UID=jogamp
@@ -26,32 +42,19 @@ export TARGET_ADB_PORT=5555
 export TARGET_ROOT=/data/projects
 export TARGET_ANT_HOME=/usr/share/ant
 
-export ANDROID_VERSION=24
 export SOURCE_LEVEL=1.8
 export TARGET_LEVEL=1.8
 export TARGET_RT_JAR=/opt-share/jre1.8.0_212/lib/rt.jar
 
-export GCC_VERSION=4.9
-HOST_ARCH=linux-x86_64
-export TARGET_TRIPLE=arm-linux-androideabi
-
-export NDK_TOOLCHAIN_ROOT=$NDK_ROOT/toolchains/${TARGET_TRIPLE}-${GCC_VERSION}/prebuilt/${HOST_ARCH}
-export TARGET_PLATFORM_SYSROOT=${NDK_ROOT}/platforms/android-${ANDROID_VERSION}/arch-arm
-
-# Need to add toolchain bins to the PATH. 
-export PATH="$NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin:$ANDROID_HOME/platform-tools:$ANDROID_HOME/build-tools/$ANDROID_BUILD_TOOLS_VERSION:$PATH"
-
-export GLUEGEN_CPPTASKS_FILE="lib/gluegen-cpptasks-android-armv6.xml"
-
 #export JUNIT_DISABLED="true"
 #export JUNIT_RUN_ARG0="-Dnewt.test.Screen.disableScreenMode"
 
-which gcc 2>&1 | tee make.gluegen.all.android-armv6-cross.log
-
 #export JOGAMP_JAR_CODEBASE="Codebase: *.jogamp.org"
 export JOGAMP_JAR_CODEBASE="Codebase: *.goethel.localnet"
 
 #BUILD_ARCHIVE=true \
 ant \
     -Drootrel.build=build-android-armv6 \
-    $* 2>&1 | tee -a make.gluegen.all.android-armv6-cross.log
+    -Dgcc.compat.compiler=clang \
+    $* 2>&1 | tee -a ${LOGF}
+
diff --git a/make/scripts/make.gluegen.all.android-x86-cross.sh b/make/scripts/make.gluegen.all.android-x86-cross.sh
index d90bc2c..eb0e15b 100755
--- a/make/scripts/make.gluegen.all.android-x86-cross.sh
+++ b/make/scripts/make.gluegen.all.android-x86-cross.sh
@@ -2,14 +2,30 @@
 
 SDIR=`dirname $0` 
 
-if [ -e $SDIR/setenv-build-jogamp-x86_64.sh ] ; then
-    . $SDIR/setenv-build-jogamp-x86_64.sh
+if [ -e ${SDIR}/setenv-build-jogamp-x86_64.sh ] ; then
+    . ${SDIR}/setenv-build-jogamp-x86_64.sh
 fi
 
-if [ -e $SDIR/setenv-android-tools.sh ] ; then
-    . $SDIR/setenv-android-tools.sh
+LOGF=make.gluegen.all.android-x86-cross.log
+rm -f ${LOGF}
+
+export ANDROID_HOME=/opt-linux-x86_64/android-sdk-linux_x86_64
+export ANDROID_API_LEVEL=24
+export ANDROID_HOST_TAG=linux-x86_64
+export ANDROID_ABI=x86
+
+if [ -e ${SDIR}/setenv-android-tools.sh ] ; then
+    . ${SDIR}/setenv-android-tools.sh >> $LOGF 2>&1
+else
+    echo "${SDIR}/setenv-android-tools.sh doesn't exist!" 2>&1 | tee -a ${LOGF}
+    exit 1
 fi
 
+export GLUEGEN_CPPTASKS_FILE="lib/gluegen-cpptasks-android-x86.xml"
+export PATH=${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_NAME}/bin:${ANDROID_TOOLCHAIN_ROOT}/bin:${ANDROID_HOME}/platform-tools:${ANDROID_BUILDTOOLS_ROOT}:${PATH}
+echo PATH ${PATH} 2>&1 | tee -a ${LOGF}
+echo clang `which clang` 2>&1 | tee -a ${LOGF}
+
 export NODE_LABEL=.
 
 export HOST_UID=jogamp
@@ -26,37 +42,19 @@ export TARGET_ADB_PORT=5555
 export TARGET_ROOT=/data/projects
 export TARGET_ANT_HOME=/usr/share/ant
 
-export ANDROID_VERSION=24
 export SOURCE_LEVEL=1.8
 export TARGET_LEVEL=1.8
 export TARGET_RT_JAR=/opt-share/jre1.8.0_212/lib/rt.jar
 
-export GCC_VERSION=4.9
-HOST_ARCH=linux-x86_64
-export TARGET_TRIPLE=i686-linux-android
-export TOOLCHAIN_NAME=x86
-
-export NDK_TOOLCHAIN_ROOT=$NDK_ROOT/toolchains/${TOOLCHAIN_NAME}-${GCC_VERSION}/prebuilt/${HOST_ARCH}
-export TARGET_PLATFORM_SYSROOT=${NDK_ROOT}/platforms/android-${ANDROID_VERSION}/arch-x86
-
-# Need to add toolchain bins to the PATH. 
-# May need to create symbolic links within $NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin
-#   cd $NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin
-#   ln -s ../../bin/i686-linux-android-gcc gcc
-export PATH="$NDK_TOOLCHAIN_ROOT/$TARGET_TRIPLE/bin:$ANDROID_HOME/platform-tools:$ANDROID_HOME/build-tools/$ANDROID_BUILD_TOOLS_VERSION:$PATH"
-
-export GLUEGEN_CPPTASKS_FILE="lib/gluegen-cpptasks-android-x86.xml"
-
 #export JUNIT_DISABLED="true"
 #export JUNIT_RUN_ARG0="-Dnewt.test.Screen.disableScreenMode"
 
-echo PATH $PATH 2>&1 | tee make.gluegen.all.android-x86-cross.log
-echo gcc `which gcc` 2>&1 | tee -a make.gluegen.all.android-x86-cross.log
-
 #export JOGAMP_JAR_CODEBASE="Codebase: *.jogamp.org"
 export JOGAMP_JAR_CODEBASE="Codebase: *.goethel.localnet"
 
 #BUILD_ARCHIVE=true \
 ant \
     -Drootrel.build=build-android-x86 \
-    $* 2>&1 | tee -a make.gluegen.all.android-x86-cross.log
+    -Dgcc.compat.compiler=clang \
+    $* 2>&1 | tee -a ${LOGF}
+
diff --git a/make/scripts/setenv-android-tools.sh b/make/scripts/setenv-android-tools.sh
index b0e6144..7f7dd56 100644
--- a/make/scripts/setenv-android-tools.sh
+++ b/make/scripts/setenv-android-tools.sh
@@ -25,7 +25,7 @@
 # - ANDROID_HOST_TAG - defaults to linux-x86_64
 #
 # - ANDROID_ABI - defaults to x86_64, one of
-#        armeabi-v7a 
+#        armeabi-v7a (with NEON by default since NDK r21)
 #        arm64-v8a 
 #        x86_64
 #        x86
@@ -97,6 +97,7 @@ if [ -z "${ANDROID_ABI}" ] ; then
     echo "Setting undefined ANDROID_ABI to ${ANDROID_ABI} default!"
 fi
 if [ "${ANDROID_ABI}" = "armeabi-v7a" ] ; then
+    # with NEON by default since NDK r21
     ANDROID_SYSROOT_ABI=arm
     #CMAKE_SYSTEM_PROCESSOR=armv7-a
     ANDROID_TOOLCHAIN_NAME=arm-linux-androideabi
diff --git a/src/java/com/jogamp/common/os/AndroidVersion.java b/src/java/com/jogamp/common/os/AndroidVersion.java
index c2c2159..897423d 100644
--- a/src/java/com/jogamp/common/os/AndroidVersion.java
+++ b/src/java/com/jogamp/common/os/AndroidVersion.java
@@ -75,7 +75,7 @@ public class AndroidVersion {
         Class<?> abvcClass = null;
         Object abvcObject= null;
 
-        boolean isDalvikVm = "Dalvik".equals(System.getProperty("java.vm.name"));
+        final boolean isDalvikVm = "Dalvik".equals(System.getProperty("java.vm.name"));
 
         if (isDalvikVm) {
           try {
@@ -111,6 +111,7 @@ public class AndroidVersion {
              * <pre>
              *  lib/armeabi/libfoo.so
              *  lib/armeabi-v7a/libfoo.so
+             *  lib/arm64-v8a/libfoo.so
              *  lib/x86/libfoo.so
              *  lib/mips/libfoo.so
              * </pre>