Use llvm-libc++ as STL, disable building of iconv, build only for armeabi-v7a, build icu 55.1

Author: zhuowei

build.sh

@@ -13,7 +13,7 @@ NDK=`readlink -f $NDK`
 
 export CLANG=1
 
-for ARCH in armeabi armeabi-v7a arm64-v8a x86 x86_64; do
+for ARCH in armeabi-v7a; do
 
 cd $BUILDDIR
 
@@ -40,7 +40,7 @@ cd $BUILDDIR/$ARCH
 
 # =========== libiconv.so ===========
 
-[ -e libiconv.so ] || {
+true || [ -e libiconv.so ] || {
 
 	rm -rf libiconv-1.15
 
@@ -163,12 +163,14 @@ cd $BUILDDIR/$ARCH
 
 	rm -rf icu
 
-	tar xvf ../icu4c-59_1-src.tgz
+	[ -e ../icu4c-55_1-src.tgz ] || exit 1
+
+	tar xvf ../icu4c-55_1-src.tgz
 
 	cd icu/source
 
-	cp -f $BUILDDIR/config.sub .
-	cp -f $BUILDDIR/config.guess .
+	#cp -f $BUILDDIR/config.sub .
+	#cp -f $BUILDDIR/config.guess .
 
 	[ -d cross ] || {
 		mkdir cross

setCrossEnvironment-armeabi-v7a.sh

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+NDK_STL="libc++"
+
 IFS='
 '
 
@@ -21,15 +23,22 @@ NDK=`readlink -f $NDK`
 #echo NDK $NDK
 GCCPREFIX=arm-linux-androideabi
 [ -z "$NDK_TOOLCHAIN_VERSION" ] && NDK_TOOLCHAIN_VERSION=4.9
-[ -z "$PLATFORMVER" ] && PLATFORMVER=android-15
+[ -z "$PLATFORMVER" ] && PLATFORMVER=android-16
+GCCVER=4.8
 LOCAL_PATH=`dirname $0`
 if which realpath > /dev/null ; then
 	LOCAL_PATH=`realpath $LOCAL_PATH`
 else
 	LOCAL_PATH=`cd $LOCAL_PATH && pwd`
 fi
 ARCH=armeabi-v7a
-
+STL_CFLAGS="-isystem$NDK/sources/cxx-stl/gnu-libstdc++/$GCCVER/include \
+-isystem$NDK/sources/cxx-stl/gnu-libstdc++/$GCCVER/libs/$ARCH/include"
+STL_LDFLAGS="-L$NDK/sources/cxx-stl/gnu-libstdc++/$GCCVER/libs/$ARCH"
+if [[ "$NDK_STL" -eq "libc++" ]] ; then
+	STL_CFLAGS="-isystem$NDK/sources/cxx-stl/llvm-libc++/include"
+	STL_LDFLAGS="-L$NDK/sources/cxx-stl/llvm-libc++/libs/$ARCH"
+fi
 
 CFLAGS="
 -fexceptions