gentoo stm32 交叉编译环境

crossdev -t s4 --gcc =5.4.0 -v arm-none-eabi

gcc版本为当前系统安装的版本,通过gcc -v 可以获得

编译完成后:
arm-none-eabi-addr2line   arm-none-eabi-elfedit     arm-none-eabi-gcc-ranlib  arm-none-eabi-ld.gold     arm-none-eabi-size
arm-none-eabi-ar          arm-none-eabi-emerge      arm-none-eabi-gcov        arm-none-eabi-nm          arm-none-eabi-strings
arm-none-eabi-as          arm-none-eabi-fix-root    arm-none-eabi-gcov-5.4.0  arm-none-eabi-objcopy     arm-none-eabi-strip
arm-none-eabi-c++filt     arm-none-eabi-gcc         arm-none-eabi-gcov-tool   arm-none-eabi-objdump
arm-none-eabi-cpp         arm-none-eabi-gcc-5.4.0   arm-none-eabi-gprof       arm-none-eabi-pkg-config
arm-none-eabi-cpp-5.4.0   arm-none-eabi-gcc-ar      arm-none-eabi-ld          arm-none-eabi-ranlib
arm-none-eabi-dwp         arm-none-eabi-gcc-nm      arm-none-eabi-ld.bfd      arm-none-eabi-readelf

使用:arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=/usr/x86_64-pc-linux-gnu/arm-none-eabi/gcc-bin/5.4.0/arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/arm-none-eabi/5.4.0/lto-wrapper
Target: arm-none-eabi
Configured with: /var/tmp/portage/cross-arm-none-eabi/gcc-5.4.0/work/gcc-5.4.0/configure --host=x86_64-pc-linux-gnu --target=arm-none-eabi --build=x86_64-pc-linux-gnu --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/arm-none-eabi/gcc-bin/5.4.0 --includedir=/usr/lib/gcc/arm-none-eabi/5.4.0/include --datadir=/usr/share/gcc-data/arm-none-eabi/5.4.0 --mandir=/usr/share/gcc-data/arm-none-eabi/5.4.0/man --infodir=/usr/share/gcc-data/arm-none-eabi/5.4.0/info --with-gxx-include-dir=/usr/lib/gcc/arm-none-eabi/5.4.0/include/g++-v5 --with-python-dir=/share/gcc-data/arm-none-eabi/5.4.0/python --enable-languages=c --enable-obsolete --enable-secureplt --disable-werror --with-system-zlib --enable-nls --without-included-gettext --enable-checking=release --with-bugurl= --with-pkgversion='Gentoo 5.4.0 p1.0, pie-0.6.5' --enable-poison-system-directories --disable-shared --disable-libatomic --disable-threads --without-headers --disable-bootstrap --with-newlib --enable-multilib --disable-altivec --disable-fixed-point --disable-libgcj --disable-libgomp --disable-libmudflap --disable-libssp --disable-libcilkrts --disable-libmpx --enable-vtable-verify --enable-libvtv --disable-libquadmath --enable-lto --without-isl --disable-libsanitizer
Thread model: single
gcc version 5.4.0 (Gentoo 5.4.0 p1.0, pie-0.6.5)

编辑代码:hello.c
#include                                                                                                     
int main(void)
{
    printf("hello world!\r\n");
    return 0;
}

编译代码:
arm-none-eabi-gcc --specs=rdimon.specs   -Wl,--start-group -lgcc -lc -lm -lrdimon -Wl,--end-group -o hello hello.c

查看结果: file hello
hello: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, not stripped, with debug_info

安装模拟环境:
QEMU_SOFTMMU_TARGETS="x86_64 arm" QEMU_USER_TARGETS="x86_64 arm" emerge app-emulation/qemu
生成qemu-arm

执行编译结果:
qemu-arm hello

输出结果:
hello world!