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客戶發過來的交叉編譯鏈：fsl-imx-x11-glibc-x86_64-meta-toolchain-qt5-cortexa7hf-neon-toolchain-4.1.15-2.1.0.sh

工具鏈版本：

# arm-poky-linux-gnueabi-gcc -v

Using built-in specs.

COLLECT_GCC=arm-poky-linux-gnueabi-gcc

COLLECT_LTO_WRAPPER=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/5.3.0/lto-wrapper

Target: arm-poky-linux-gnueabi

Configured with: ../../../../../../work-shared/gcc-5.3.0-r0/gcc-5.3.0/configure --build=x86_64-linux --host=x86_64-pokysdk-linux --target=arm-poky-linux-gnueabi --prefix=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr --exec_prefix=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr --bindir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi --sbindir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi --libexecdir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi --datadir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/share --sysconfdir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/etc --sharedstatedir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/com --localstatedir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/var --libdir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/lib/arm-poky-linux-gnueabi --includedir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/include --oldincludedir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/include --infodir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/share/info --mandir=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/x86_64-pokysdk-linux/usr/share/man --disable-silent-rules --disable-dependency-tracking --with-libtool-sysroot=/home/linuxdzm/alientek_workspace/ycoto/fsl-release-bsp/buildQt5.12.9/tmp/sysroots/x86_64-nativesdk-pokysdk-linux --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=arm-poky-linux-gnueabi- --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++/5.3.0 --with-build-time-tools=/home/linuxdzm/alientek_workspace/ycoto/fsl-release-bsp/buildQt5.12.9/tmp/sysroots/x86_64-linux/usr/arm-poky-linux-gnueabi/bin --with-sysroot=/not/exist --with-build-sysroot=/home/linuxdzm/alientek_workspace/ycoto/fsl-release-bsp/buildQt5.12.9/tmp/sysroots/imx6ull14x14evk --enable-poison-system-directories --with-mpfr=/home/linuxdzm/alientek_workspace/ycoto/fsl-release-bsp/buildQt5.12.9/tmp/sysroots/x86_64-nativesdk-pokysdk-linux --with-mpc=/home/linuxdzm/alientek_workspace/ycoto/fsl-release-bsp/buildQt5.12.9/tmp/sysroots/x86_64-nativesdk-pokysdk-linux --enable-nls --with-arch=armv7-a

Thread model: posix

gcc version 5.3.0 (GCC) 

說明已經安裝好編譯環境，編譯的時候報錯：如下*** fatal error: studio.h: No such file or directory，實際上系統是有這些庫文件的

1：查看對方提供的交叉編譯說明， 才知道他們編譯之前需要source一個文件

source /opt/fsl-imx-x11/4.1.15-2.1.0/environment-setup-cortexa7hf-neon-poky-linux-gnueabi

2：查看文件內容， 發現 CC 是需要指定一系列參數的，所以直接使用arm-poky-linux-gnueabi-gcc serialport.c dllMain.c utf.c -std=c99 -shared -fPIC -ldl -o libDonseeCom.so是不行的。

導入庫的目錄

export SDKTARGETSYSROOT=/opt/fsl-imx-x11/4.1.15-2.1.0/sysroots/cortexa7hf-neon-poky-linux-gnueabi

3：指定CC

export CC="arm-poky-linux-gnueabi-gcc -march=armv7-a -mthumb -mfpu=neon -mfloat-abi=hard --sysroot=$SDKTARGETSYSROOT"

4：編譯命令加上  -mthumb -mfpu=neon -mfloat-abi=hard --sysroot=$SDKTARGETSYSROOT

arm-poky-linux-gnueabi-gcc serialport.c dllMain.c utf.c -std=c99 -shared -fPIC -ldl -o libDonseeCom.so -mthumb -mfpu=neon -mfloat-abi=hard --sysroot=$SDKTARGETSYSROOT

可以看到編譯成功后是32位的arm文件

編譯執行文件：

gcc donseeTest.c -o donseeTest ./libDonseeCom.so

執行文件

./donseeTest

ARM真機上面運行測試，測試結果正常。

tips：如果是cortexa8hf-vfp-neon-poky-linux-gnueabi，則換成這個 export CC="arm-poky-linux-gnueabi-gcc  -march=armv7-a -mfloat-abi=hard -mfpu=neon -mtune=cortex-a8 --sysroot=$SDKTARGETSYSROOT"