Bug 1417 - Android: Support building using current SDK and NDK v20 as of 2019-12-10 (GlueGen w/ android-aarch64 patched)

Default Platform: Android 7.0 Nougat, API level 24 supports Java 1.8

Reworked gluegen/make/scripts/setenv-android-tools.sh,
following canonical environment variables and sets all
required variables for cross-compilation.
See file's comments!

ant files:
  - android.version -> android.api.level (default 24)
  - android.jar defaults to ${gluegen.root}/make/lib/android-sdk/24/android.jar (provided)

1 files changed, 54 insertions, 46 deletions

diff --git a/make/lib/gluegen-cpptasks-android-aarch64.xml b/make/lib/gluegen-cpptasks-android-aarch64.xml
index 1daa201..4b6401b 100644
--- a/make/lib/gluegen-cpptasks-android-aarch64.xml
+++ b/make/lib/gluegen-cpptasks-android-aarch64.xml
@@ -23,7 +23,7 @@
     <property name="isAndroidARM64"                   value="true" /> 
     <property name="jvmDataModel.arg"                 value="-Djnlp.no.jvm.data.model.set=true" /> 
     <property name="isCrosscompilation"               value="true" />
-    <property name="android.abi"                      value="arm64-v8a" />
+    <property name="android.abi"                      value="${env.ANDROID_ABI}" /> <!-- arm64-v8a -->
     <property name="isAbiEabiGnuArmel"                value="true" />
     <echo message="gluegen.cpptasks.detect.os.custom: GLUEGEN_CPPTASKS_FILE 'gluegen-cpptasks-android-aarch64' done"/>
 </target>
@@ -32,24 +32,27 @@
 
 <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="-fstack-protector" />
+      <compilerarg value="-fstack-protector-strong" />
       <!-- compilerarg value="-no-canonical-prefixes" / --> <!-- will disallow creating shared library -->
-      <compilerarg value="-Wa,--noexecstack" /> 
+      <!-- from sdk cmake end -->
 
+      <compilerarg value="-Wa,--noexecstack" /> 
 
+      <compilerarg value="-target" />
+      <compilerarg value="${env.ANDROID_LLVM_TRIPLE}" /> <!-- aarch64-none-linux-android -->
       <!-- compilerarg value="-mabi=lp64" />
       <compilerarg value="-mlittle-endian" />
       <compilerarg value="-march=armv8-a" / -->
@@ -60,15 +63,15 @@
       <!-- 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"/> 
+      <!-- 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__" />
@@ -85,39 +88,44 @@
       </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="-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"/>
-         <!-- 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="-Wl,-L,${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_0}" / -->
+      <linkerarg value="-Wl,-L,${env.ANDROID_TOOLCHAIN_SYSROOT_LIB_1}" />
+      
+      <!-- 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" / --> 
+      <!-- from sdk cmake end -->
+
+      <linkerarg value="-fno-use-linker-plugin" /> 
+
+      <!-- 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"/>
+
+      <!-- libset libs="c,m,dl,log" / -->
+      <libset libs="c,m,dl" />
     </linker>
 
 </target>