Script for Building Android Toolchain (both host and target arm-linux-androideabi)

build.sh

#!/bin/bash
# You need to fix several header error before compiling.
# For more information, please read: http://blog.mssun.me/technology/android/build-android-toolchain/

export PWD=`pwd`
export PREFIX=${PWD}/system
export NDK_HOME=/xxx/aosp/android-ndk-r10e
export CROSS_COMPILE=${NDK_HOME}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
export PATH=${NDK_HOME}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin:$PATH
export SYSROOT=${NDK_HOME}/platforms/android-21/arch-arm

make distclean
rm */config.cache

sed -i 's/^#include <stdio_ext.h>/\/* #include <stdio_ext.h> *\//' libiberty/fopen_unlocked.c
sed -i 's/^# include <sys\/sysctl.h>/\/* # include <sys\/sysctl.h> *\//' libiberty/physmem.c
ln -s ${NDK_HOME}/platforms/android-21/arch-arm/usr/lib/crtbegin_so.o ld/ 
ln -s ${NDK_HOME}/platforms/android-21/arch-arm/usr/lib/crtend_so.o ld/

./configure \
    --prefix=$PREFIX \
    --host=arm-linux-androideabi \
    --target=arm-linux-androideabi \
    --disable-option-checking \
    CC=${CROSS_COMPILE}gcc \
    CXX=${CROSS_COMPILE}g++ \
    CFLAGS="-g -I -O2 -mandroid -mbionic  -I${NDK_HOME}/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9/include -I${SYSROOT}/usr/include/ --sysroot=${SYSROOT} -Wno-error -fPIE" \
    LDFLAGS="-L${NDK_HOME}/platforms/android-21/arch-arm/usr/lib -pie" \
    CPP=${CROSS_COMPILE}cpp \
    CPPFLAGS="-I${NDK_HOME}/platforms/android-21/arch-arm/usr/include/" \
    AR=${CROSS_COMPILE}ar

make -j4 
mkdir -p $PREFIX
make install

This script is helpful but it seems that there is still a problem with "crtbegin_so.o" --> ld/ doesn't exist or am I blind ?

@heyligengregory it exist only during binutils build