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| − | ===Setup Development Environment===
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| − | ====Using Docker to Cross-Compile====
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| − | Please refre to [https://github.com/friendlyarm/docker-cross-compiler-novnc docker-cross-compiler-novnc]
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| − | ====Build a cross-compiling environment====
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| − | =====Install required packages=====
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| − | Install and run requirements ubuntu 20.04, install required packages using the following commands:
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| − | <syntaxhighlight lang="bash">
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| − | sudo apt-get -y update
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| − | sudo apt-get install -y sudo curl
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| − | sudo bash -c \
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| − | "$(curl -fsSL https://raw.githubusercontent.com/friendlyarm/build-env-on-ubuntu-bionic/master/install.sh)"
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| − | </syntaxhighlight>
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| − | The following cross-compilers will be installed:
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| − | {| class="wikitable"
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| − | |-
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| − | ! Version
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| − | ! Architecture
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| − | ! Compiler path
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| − | ! Purpose
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| − | |-
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| − | | 4.9.3
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| − | | armhf
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| − | | /opt/FriendlyARM/toolchain/4.9.3
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| − | | Used for compiling 32-bit ARM applications
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| − | |-
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| − | | 6.4
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| − | | aarch64
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| − | | /opt/FriendlyARM/toolchain/6.4-aarch64
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| − | | Used for cross-compiling kernel 4.4
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| − | |-
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| − | | 11.3
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| − | | aarch64
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| − | | /opt/FriendlyARM/toolchain/11.3-aarch64
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| − | | Used for cross-compiling kernel 4.19 and above (including 5.10, 5.15) and U-Boot
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| − | |}
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| − | =====Setting Cross Compiler=====
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| − | Based on the table in the previous section, select the appropriate version of the compiler and add the compiler's path to PATH. For example, if you want to use the 11.3 cross-compiler, edit ~/.bashrc using vi and add the following content to the end:
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| − | <syntaxhighlight lang="bash">
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| − | export PATH=/opt/FriendlyARM/toolchain/11.3-aarch64/bin:$PATH
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| − | export GCC_COLORS=auto
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| − | </syntaxhighlight>
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| − | Run the ~/.bashrc script to make it effective in the current commandline. Note: there is a space after ".":
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| − | <syntaxhighlight lang="bash">
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| − | . ~/.bashrc
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| − | </syntaxhighlight>
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| − | To verify if the installation was successful：
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| − | <syntaxhighlight lang="bash">
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| − | $ aarch64-linux-gcc -v
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| − | Using built-in specs.
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| − | COLLECT_GCC=aarch64-linux-gcc
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| − | COLLECT_LTO_WRAPPER=/opt/FriendlyARM/toolchain/11.3-aarch64/libexec/gcc/aarch64-cortexa53-linux-gnu/11.3.0/lto-wrapper
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| − | Target: aarch64-cortexa53-linux-gnu
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| − | Configured with: /home/cross/arm64/src/gcc/configure --build=x86_64-build_pc-linux-gnu --host=x86_64-build_pc-linux-gnu --target=aarch64-cortexa53-linux-gnu --prefix=/opt/FriendlyARM/toolchain/11.3-aarch64 --exec_prefix=/opt/FriendlyARM/toolchain/11.3-aarch64 --with-sysroot=/opt/FriendlyARM/toolchain/11.3-aarch64/aarch64-cortexa53-linux-gnu/sysroot --enable-languages=c,c++ --enable-fix-cortex-a53-843419 --with-arch=armv8-a+crypto+crc --with-cpu=cortex-a53 --with-pkgversion=ctng-1.25.0-119g-FA --with-bugurl=http://www.friendlyelec.com/ --enable-objc-gc --enable-__cxa_atexit --disable-libmudflap --disable-libgomp --disable-libssp --disable-libquadmath --disable-libquadmath-support --disable-libsanitizer --disable-libmpx --with-gmp=/home/cross/arm64/buildtools --with-mpfr=/home/cross/arm64/buildtools --with-mpc=/home/cross/arm64/buildtools --with-isl=/home/cross/arm64/buildtools --enable-lto --enable-threads=posix --disable-libstdcxx-pch --enable-clocale=gnu --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-indirect-function --enable-gnu-unique-object --enable-default-pie --enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin --enable-gold --with-libintl-prefix=/home/cross/arm64/buildtools --disable-multilib --with-local-prefix=/opt/FriendlyARM/toolchain/11.3-aarch64/aarch64-cortexa53-linux-gnu/sysroot --enable-long-long --enable-checking=release --enable-link-serialization=2
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| − | Thread model: posix
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| − | Supported LTO compression algorithms: zlib
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| − | gcc version 11.3.0 (ctng-1.25.0-119g-FA)
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| − | </syntaxhighlight>
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