一.使用交叉编译器编译
1.安装交叉编译工具链
2.导出环境变量
[ubuntu @tmp]$ export PATH=$PATH:/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/bin/aarch64-poky-linux //导出编译工具链的路径 [ubuntu @tmp]$ export CC="aarch64-poky-linux-gcc -march=armv8-a -mtune=cortex-a57.cortex-a53 --sysroot=/usr/local/oecore-x86_64/sysroots/aarch64-poky-linux" //编译时要指定sysroot [ubuntu @tmp]$ $CC test.c -o test //编译
注意：Android上面的编译方法不是这样的。
[ubuntu @Yocto]$ . scripts/oesdk_app.sh [ubuntu @Yocto]$ $CC -v Using built-in specs. COLLECT_GCC=aarch64-poky-linux-gcc COLLECT_LTO_WRAPPER=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/libexec/aarch64-poky-linux/gcc/aarch64-poky-linux/7.2.0/lto-wrapper Target: aarch64-poky-linux Configured with: ../../../../../../work-shared/gcc-7.2.0-r0/gcc-7.2.0/configure --build=x86_64-linux --host=x86_64-oesdk-linux --target=aarch64-poky-linux --prefix=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr --exec_prefix=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr --bindir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/bin/aarch64-poky-linux --sbindir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/bin/aarch64-poky-linux --libexecdir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/libexec/aarch64-poky-linux --datadir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/share --sysconfdir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/etc --sharedstatedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/com --localstatedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/var --libdir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/lib/aarch64-poky-linux --includedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/include --oldincludedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/include --infodir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/share/info --mandir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-linux/usr/share/man --disable-silent-rules --disable-dependency-tracking --with-libtool-sysroot=/home/user10/g6s/build/tmp/work/x86_64-nativesdk-oesdk-linux/gcc-cross-canadian-aarch64/7.2.0-r0/recipe-sysroot --with-gnu-ld --enable-shared --enable-languages=c,c++ --enable-threads=posix --enable-multilib --enable-c99 --enable-long-long --enable-symvers=gnu --enable-libstdcxx-pch --program-prefix=aarch64-poky-linux- --without-local-prefix --enable-lto --enable-libssp --enable-libitm --disable-bootstrap --disable-libmudflap --with-system-zlib --with-linker-hash-style=gnu --enable-linker-build-id --with-ppl=no --with-cloog=no --enable-checking=release --enable-cheaders=c_global --without-isl --with-gxx-include-dir=/not/exist/usr/include/c++/7.2.0 --with-build-time-tools=/home/user10/g6s/build/tmp/work/x86_64-nativesdk-oesdk-linux/gcc-cross-canadian-aarch64/7.2.0-r0/recipe-sysroot-native/usr/aarch64-poky-linux/bin --with-sysroot=/not/exist --with-build-sysroot=/home/user10/g6s/build/tmp/work/x86_64-nativesdk-oesdk-linux/gcc-cross-canadian-aarch64/7.2.0-r0/recipe-sysroot --without-long-double-128 --enable-poison-system-directories --with-mpfr=/home/user1/g6p/build/tmp/work/x86_64-nativesdk-oesdk-linux/gcc-cross-canadian-aarch64/7.2.0-r0/recipe-sysroot --with-mpc=/home/user1/g6p/build/tmp/work/x86_64-nativesdk-oesdk-linux/gcc-cross-canadian-aarch64/7.2.0-r0/recipe-sysroot --enable-nls --enable-initfini-array --enable-__cxa_atexit Thread model: posix gcc version 7.2.0 (GCC)