Build Curl for Android NDK

build_curl.md

Build libcurl for android NDK

Libcurl requires openssl and zlib to be fully operationnal

• Step 1 : cross compile zlib
• Step 2 : cross compile openssl
• Step 3 : cross compile curl with zlib/openssl external link

Prerequisites :

• NDK installed
• NDK added to PATH : PATH=$PATH:/home/user/android-ndk
• standalone toolchain generated and added to path : PATH=$PATH:/home/user/android-toolchain/bin

Build zlib for arch arm-linux-androideabi

• get sources

wget http://zlib.net/zlib-1.2.8.tar.gz
tar -xvzf zlib-1.2.8.tar.gz
cd zlib-1.2.8

• build settings

INSTALLATION_PATH=/path/to/install_directory

export CC=arm-linux-androideabi-gcc
export CPP=arm-linux-androideabi-g++
export AR=arm-linux-androideabi-ar
export prefix=$INSTALLATION_PATH

• build & install

./configure
make
make install

Build openSSL for arch arm-linux-androideabi

• get sources

wget https://www.openssl.org/source/openssl-1.0.1p.tar.gz
tar -xvzf openssl-1.0.1p.tar.gz

• build settings

#Delete all reference to arm-linux-androideabi arch in your path before pursuing, the following will do this for you

INSTALLATION_PATH=/path/to/install_directory

wget https://wiki.openssl.org/images/7/70/Setenv-android.sh
chmod 777 Setenv-android.sh
export ANDROID_NDK_ROOT=/path/to/ndk
change _ANDROID_API="android-18" to _ANDROID_API="android-21" in Setecn
. ./Setenv-android.sh
cd openssl-1.0.1p
perl -pi -e 's/install: all install_docs install_sw/install: install_docs install_sw/g' Makefile.org
./config shared no-ssl2 no-ssl3 no-comp no-hw no-engine --openssldir=$INSTALLATION_PATH

• build

make depend
make all
make install

Build curl for arch arm-linux-androideabi

• build settings

#Before all, add standalone toolchain to your path if you dont (remove latter toolchain entry from openssl build and add the one you got from make-standalone.sh script)

INSTALLATION_PATH=/path/to/install_directory

export CROSS_COMPILE="arm-linux-androideabi"
export CPPFLAGS="-I/home/abathur/MyApplication/app/src/main/prebuild/include" #path to zlib and openssl header folder
export LDFLAGS="-L/home/abathur/MyApplication/app/src/main/prebuild" #path to zlib and openssl library folder
export AR=${CROSS_COMPILE}-ar
export AS=${CROSS_COMPILE}-as
export LD=${CROSS_COMPILE}-ld
export RANLIB=${CROSS_COMPILE}-ranlib
export CC=${CROSS_COMPILE}-gcc
export NM=${CROSS_COMPILE}-nm
export LIBS="-lssl -lcrypto"

./configure --host=${CROSS_COMPILE} --with-ssl --with-zlib --disable-ftp --disable-gopher --disable-file --disable-imap --disable-ldap --disable-ldaps --disable-pop3 --disable-proxy --disable-rtsp --disable-smtp --disable-telnet --disable-tftp --without-gnutls --without-libidn --without-librtmp --disable-dict

• build & install

make

DESTDIR=$INSTALLATION_PATH

make install