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| # BUILDING external libs | ||
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| Based on https://forum.getmonero.org/5/support/87643/building-monero-v0-10-3-1-for-android and the internet. | ||
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| Do not follow this blindly. These instructions are for 32-bit only. 64-bit building mostly involves | ||
| replacing "32" with "64". | ||
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| ## Prepare Ubuntu environment | ||
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| ``` | ||
| sudo apt-install build-essential cmake tofrodos | ||
| sudo mkdir /opt/android | ||
| sudo chown $LOGNAME /opt/android | ||
| ``` | ||
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| ## Install Android NDK | ||
| ``` | ||
| cd /opt/android | ||
| wget https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip | ||
| unzip android-ndk-r15c-linux-x86_64.zip | ||
| android-ndk-r15c/build/tools/make_standalone_toolchain.py --api 21 --stl=libc++ --arch arm --install-dir /opt/android/tool32 | ||
| ``` | ||
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| ## Build OpenSSL | ||
| Best is to compile openssl from sources. Copying from your phone or elsewhere (don't!) ends up in misery. | ||
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| ### Setup environment | ||
| ``` | ||
| cd /opt/android | ||
| wget https://wiki.openssl.org/images/7/70/Setenv-android.sh | ||
| fromdos Setenv-android.sh | ||
| ``` | ||
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| Edit Setenv-android.sh: | ||
| ``` | ||
| _ANDROID_EABI="arm-linux-androideabi-4.9" | ||
| _ANDROID_API="android-21" | ||
| ``` | ||
| Then: | ||
| ``` | ||
| export ANDROID_NDK_ROOT=/opt/android/android-ndk-r15c | ||
| . ./Setenv-android.sh | ||
| ``` | ||
| and ignore error about FIPS_SIG. | ||
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| ### Download and build OpenSSL | ||
| ``` | ||
| wget https://github.com/openssl/openssl/archive/OpenSSL_1_0_2l.tar.gz | ||
| tar xfz OpenSSL_1_0_2l.tar.gz | ||
| cd openssl-OpenSSL_1_0_2l/ | ||
| 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=/opt/android/openssl/android-21/ | ||
| make depend | ||
| # Make sure we don't get versioned .so which Android can't deal with | ||
| make CALC_VERSIONS="SHLIB_COMPAT=; SHLIB_SOVER=" MAKE="make -e" all | ||
| mkdir -p /opt/android/openssl/android-21/lib | ||
| echo "place-holder make target for avoiding symlinks" >> /opt/android/openssl/android-21/lib/link-shared | ||
| make SHLIB_EXT=.so install_sw | ||
| ``` | ||
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| ### Make symlinks | ||
| ``` | ||
| cd /opt/android/tool32/sysroot/usr/include | ||
| ln -s ../../../../openssl/android-21/include/openssl | ||
| cd /opt/android/tool32/sysroot/usr/lib | ||
| ln -s ../../../../openssl/android-21/lib/libssl.so | ||
| ln -s ../../../../openssl/android-21/lib/libcrypto.so | ||
| ``` | ||
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| ## Build Boost | ||
| ``` | ||
| cd /opt/android | ||
| https://sourceforge.net/projects/boost/files/boost/1.64.0/boost_1_64_0.tar.gz/download -O boost_1_64_0.tar.gz | ||
| tar xfz boost_1_64_0.tar.gz | ||
| (cd boost_1_64_0; ./bootstrap.sh) | ||
| ``` | ||
| The NDK r15c above gives errors about fsetpos and fgetpos not found(!?!), so we "just" comment them out in the include file: | ||
| `nano /opt/android/tool32/include/c++/4.9.x/cstdio` (`//using ::fgetpos`, `//using ::fsetpos`) | ||
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| Then: | ||
| ``` | ||
| export PATH=/opt/android/tool32/arm-linux-androideabi/bin:/opt/android/tool32/bin:$PATH | ||
| ./b2 --build-type=minimal link=static runtime-link=static --with-chrono --with-date_time --with-filesystem --with-program_options --with-regex --with-serialization --with-system --with-thread --build-dir=android32 --stagedir=android32 toolset=clang threading=multi threadapi=pthread target-os=android stage | ||
| ``` | ||
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| ## And finally: Build Monero | ||
| ``` | ||
| cd /opt/android | ||
| git clone https://github.com/monero-project/monero | ||
| cd monero | ||
| # <patch monero code as needed> | ||
| mkdir -p build/release.android32 | ||
| cd build/release.android32 | ||
| # only if not set already set | ||
| export PATH=/opt/android/tool32/arm-linux-androideabi/bin:/opt/android/tool32/bin:$PATH | ||
| CC=clang CXX=clang++ cmake -D BUILD_TESTS=OFF -D ARCH="armv7-a" -D STATIC=ON -D BUILD_64=OFF -D CMAKE_BUILD_TYPE=release -D ANDROID=true -D BUILD_TAG="android" -D BOOST_ROOT=/opt/android/boost_1_64_0 -D BOOST_LIBRARYDIR=/opt/android/boost_1_64_0/android32/lib -D OPENSSL_ROOT_DIR=/opt/android/openssl/android-21 -D CMAKE_POSITION_INDEPENDENT_CODE:BOOL=true ../.. | ||
| make | ||
| find . -name '*.a' -exec cp '{}' lib \; | ||
| ``` | ||
| Ignore the warning from the last command - all static libraries are now in `lib`. | ||
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| # Bringing it all together | ||
| - Copy all .a libraries into the appropriate `external-libs` folders. | ||
| - Copy `/opt/android/monero/src/wallet/wallet2_api.h` into `external-libs/monero/include` |