配置qt的交叉编译工具
配置qt的交叉编译分为以下几步：
- 修改qtcreator中的gcc和g++的编译器
- 使用新的gcc编译qt源码，得到新的qmake
解压qt源码
tar -xvf qt-everywhere-opensource-src-5.9.9.tar.xz修改qt配置文件qtbase/mkspecs/linux-aarch64-gnu-g++/qmake.conf（我选择不修改，仅查看）
$ cat qtbase/mkspecs/linux-aarch64-gnu-g++/qmake.conf
#
# qmake configuration for building with aarch64-linux-gnu-g++
#
MAKEFILE_GENERATOR = UNIX
CONFIG += incremental
QMAKE_INCREMENTAL_STYLE = sublib
include(../common/linux.conf)
include(../common/gcc-base-unix.conf)
include(../common/g++-unix.conf)
# modifications to g++.conf
QMAKE_CC = aarch64-linux-gnu-gcc
QMAKE_CXX = aarch64-linux-gnu-g++
QMAKE_LINK = aarch64-linux-gnu-g++
QMAKE_LINK_SHLIB = aarch64-linux-gnu-g++
# modifications to linux.conf
QMAKE_AR = aarch64-linux-gnu-ar cqs
QMAKE_OBJCOPY = aarch64-linux-gnu-objcopy
QMAKE_NM = aarch64-linux-gnu-nm -P
QMAKE_STRIP = aarch64-linux-gnu-strip
load(qt_config)可以看到，交叉编译使用的命令是aarch64-linux-gnu-gcc-ar，而我安装的是aarch64-linux-gnu-gcc-ar-8 ，为了方便，我们选择修改命令名字，不修改qt配置，因为不知道除了这里还有哪里需要一同改动，将所有aarch64-linux-gnu下的带-8的命令做软连接，把-8去掉,
$ sudo ln -s /usr/bin/aarch64-linux-gnu-cpp-8 /usr/bin/aarch64-linux-gnu-cpp
$ sudo ln -s /usr/bin/aarch64-linux-gnu-gcc-ranlib-8 /usr/bin/aarch64-linux-gnu-gcc-ranlib
$ sudo ln -s /usr/bin/aarch64-linux-gnu-g++-8 /usr/bin/aarch64-linux-gnu-g++
$ sudo ln -s /usr/bin/aarch64-linux-gnu-gcov-8 /usr/bin/aarch64-linux-gnu-gcov
$ sudo ln -s /usr/bin/aarch64-linux-gnu-gcov-dump-8 /usr/bin/aarch64-linux-gnu-gcov-dump
$ sudo ln -s /usr/bin/aarch64-linux-gnu-gcc-8 /usr/bin/aarch64-linux-gnu-gcc
$ sudo ln -s /usr/bin/aarch64-linux-gnu-gcc-ar-8 /usr/bin/aarch64-linux-gnu-gcc-ar
$ sudo ln -s /usr/bin/aarch64-linux-gnu-gcov-tool-8 /usr/bin/aarch64-linux-gnu-gcov-tool
$ sudo ln -s /usr/bin/aarch64-linux-gnu-gcc-nm-8 /usr/bin/aarch64-linux-gnu-gcc-nm修改后结果如下
$ ls -l /usr/bin/aarch64-linux-gnu*
-rwxr-xr-x 1 root root 31768 2月 9 12:37 /usr/bin/aarch64-linux-gnu-addr2line
-rwxr-xr-x 1 root root 64544 2月 9 12:37 /usr/bin/aarch64-linux-gnu-ar
-rwxr-xr-x 1 root root 371528 2月 9 12:37 /usr/bin/aarch64-linux-gnu-as
-rwxr-xr-x 1 root root 31352 2月 9 12:37 /usr/bin/aarch64-linux-gnu-c++filt
lrwxrwxrwx 1 root root 23 5月 11 15:28 /usr/bin/aarch64-linux-gnu-cpp -> aarch64-linux-gnu-cpp-8
-rwxr-xr-x 1 root root 1067960 2月 27 2019 /usr/bin/aarch64-linux-gnu-cpp-8
-rwxr-xr-x 1 root root 3084976 2月 9 12:37 /usr/bin/aarch64-linux-gnu-dwp
-rwxr-xr-x 1 root root 35528 2月 9 12:37 /usr/bin/aarch64-linux-gnu-elfedit
lrwxrwxrwx 1 root root 23 5月 11 15:29 /usr/bin/aarch64-linux-gnu-g++ -> aarch64-linux-gnu-g++-8
-rwxr-xr-x 1 root root 1067960 2月 27 2019 /usr/bin/aarch64-linux-gnu-g++-8
lrwxrwxrwx 1 root root 23 5月 11 15:29 /usr/bin/aarch64-linux-gnu-gcc -> aarch64-linux-gnu-gcc-8
-rwxr-xr-x 1 root root 1067960 2月 27 2019 /usr/bin/aarch64-linux-gnu-gcc-8
lrwxrwxrwx 1 root root 26 5月 11 15:29 /usr/bin/aarch64-linux-gnu-gcc-ar -> aarch64-linux-gnu-gcc-ar-8
-rwxr-xr-x 1 root root 31200 2月 27 2019 /usr/bin/aarch64-linux-gnu-gcc-ar-8
lrwxrwxrwx 1 root root 26 5月 11 15:29 /usr/bin/aarch64-linux-gnu-gcc-nm -> aarch64-linux-gnu-gcc-nm-8
-rwxr-xr-x 1 root root 31200 2月 27 2019 /usr/bin/aarch64-linux-gnu-gcc-nm-8
lrwxrwxrwx 1 root root 30 5月 11 15:30 /usr/bin/aarch64-linux-gnu-gcc-ranlib -> aarch64-linux-gnu-gcc-ranlib-8
-rwxr-xr-x 1 root root 31200 2月 27 2019 /usr/bin/aarch64-linux-gnu-gcc-ranlib-8
lrwxrwxrwx 1 root root 24 5月 11 15:30 /usr/bin/aarch64-linux-gnu-gcov -> aarch64-linux-gnu-gcov-8
-rwxr-xr-x 1 root root 655448 2月 27 2019 /usr/bin/aarch64-linux-gnu-gcov-8
lrwxrwxrwx 1 root root 29 5月 11 15:30 /usr/bin/aarch64-linux-gnu-gcov-dump -> aarch64-linux-gnu-gcov-dump-8
-rwxr-xr-x 1 root root 503760 2月 27 2019 /usr/bin/aarch64-linux-gnu-gcov-dump-8
lrwxrwxrwx 1 root root 29 5月 11 15:30 /usr/bin/aarch64-linux-gnu-gcov-tool -> aarch64-linux-gnu-gcov-tool-8
-rwxr-xr-x 1 root root 528400 2月 27 2019 /usr/bin/aarch64-linux-gnu-gcov-tool-8
-rwxr-xr-x 1 root root 98640 2月 9 12:37 /usr/bin/aarch64-linux-gnu-gprof
lrwxrwxrwx 1 root root 24 2月 9 12:37 /usr/bin/aarch64-linux-gnu-ld -> aarch64-linux-gnu-ld.bfd
-rwxr-xr-x 1 root root 1688200 2月 9 12:37 /usr/bin/aarch64-linux-gnu-ld.bfd
-rwxr-xr-x 1 root root 5314320 2月 9 12:37 /usr/bin/aarch64-linux-gnu-ld.gold
-rwxr-xr-x 1 root root 44784 2月 9 12:37 /usr/bin/aarch64-linux-gnu-nm
-rwxr-xr-x 1 root root 175528 2月 9 12:37 /usr/bin/aarch64-linux-gnu-objcopy
-rwxr-xr-x 1 root root 341496 2月 9 12:37 /usr/bin/aarch64-linux-gnu-objdump
-rwxr-xr-x 1 root root 64544 2月 9 12:37 /usr/bin/aarch64-linux-gnu-ranlib
-rwxr-xr-x 1 root root 568280 2月 9 12:37 /usr/bin/aarch64-linux-gnu-readelf
-rwxr-xr-x 1 root root 31648 2月 9 12:37 /usr/bin/aarch64-linux-gnu-size
-rwxr-xr-x 1 root root 31816 2月 9 12:37 /usr/bin/aarch64-linux-gnu-strings
-rwxr-xr-x 1 root root 175528 2月 9 12:37 /usr/bin/aarch64-linux-gnu-strip然后执行./configure的命令(这个配置命令需要根据实际情况修改)
./configure -opensource -confirm-license -extprefix /opt/aarch64-qt -xplatform linux-aarch64-gnu-g++ -no-opengl配置通过，进行编译
make -j8
sudo make install- 修改qtcreator中的qt版本（qmake）
- 运行代码检查环境
