Mac上有Alfred这样的辅助软件，非常好用，Linux下也有不少，比如Albert/Mutate，这两个都是Qt开发的，还有一些是Electron开发的，虽然看起来不错，但是我本身不太喜欢用Electron的软件，体积大运行效率低，所以就不考虑了，Mutate很久没人维护了，所以我一直用Albert，下载了二进制的deb包发现安装报错，缺少很多个库，我也不想添加源来安装，Linux系统一个很大的问题就是你添加各种源，然后安装各种lib，突然有一天就报错了，各种程序无法运行，甚至系统都无法升级，虽然这些问题都能解决，但是要浪费不少时间，现在用了深度系统之后，GUI软件基本上只用系统自带商店下的，所以干脆就自己checkout源码下来编译最新的版本了，这样既可以用最新的功能或者修复最新的bug，还可以自己完全掌控。

于是开始动手，根据官方文档，先创建albert-build目录进行编译, 直接报错如下

➜  albert-build git:(dev) ✗ cmake ../../albert -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug
-- The C compiler identification is GNU 6.3.0
-- The CXX compiler identification is GNU 6.3.0

CMake Error at lib/globalshortcut/CMakeLists.txt:5 (find_package):
  By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Qt5", but
  CMake did not find one.

  Could not find a package configuration file provided by "Qt5" (requested
  version 5.5.0) with any of the following names:

    Qt5Config.cmake
    qt5-config.cmake

  Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
  to a directory containing one of the above files.  If "Qt5" provides a
  separate development package or SDK, be sure it has been installed.

提示没有配置Qt编译环境，这个只需要cmake添加参数CMAKE_PREFIX_PATH指向QtSDK就行了，比如我装的Qt5.14.2，添加如下

cmake ../../albert -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=/home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/cmake/Qt5

继续编译，再次报错

Scanning dependencies of target calculator
[ 44%] Building CXX object plugins/calculator/CMakeFiles/calculator.dir/src/configwidget.cpp.o
[ 44%] Building CXX object plugins/calculator/CMakeFiles/calculator.dir/src/extension.cpp.o
/home/user/Workspace/QtPrj/albert/plugins/calculator/src/extension.cpp:11:22: fatal error: muParser.h: 没有那个文件或目录
 #include "muParser.h"
                      ^
compilation terminated.

提示缺少一个头文件，直接运行sudo apt install libmuparser-dev安装好libmuparser继续编译，编译完成后使用sudo make install安装，然后直接运行albert，还是报错，如下

albert: error while loading shared libraries: libQt5Charts.so.5: cannot open shared object file: No such file or directory

用ldd直接查看albert缺少哪些库ldd /usr/bin/albert

➜  ldd /usr/bin/albert
/usr/bin/albert: /lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.14' not found (required by /usr/bin/albert)
/usr/bin/albert: /lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.14' not found (required by /usr/bin/../lib/x86_64-linux-gnu/albert/libalbert.so)
/usr/bin/albert: /lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.14' not found (required by /usr/bin/../lib/x86_64-linux-gnu/albert/libxdg.so)

只是报缺少libQt5Core.so.5，直接去/etc/ld.so.conf.d下创建一个qt5.conf的文件，里面写入QtSDK里面的运行库路径，比如/home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib，然后运行sudo ldconfig -v|grep qt5查看，配置正确后运行albert就能跑起来了，但是这样只能在本机上面跑，这时候再ldd /usr/bin/albert就能看到albert所需要的库文件，以此类推对其他的so也检查一下。

➜ ldd /usr/bin/albert|grep Qt
    libQt5Concurrent.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Concurrent.so.5 (0x00007ff0add90000)
    libQt5Network.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Network.so.5 (0x00007ff0ad9e0000)
    libQt5Sql.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Sql.so.5 (0x00007ff0ad790000)
    libQt5Charts.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Charts.so.5 (0x00007ff0acf48000)
    libQt5X11Extras.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5X11Extras.so.5 (0x00007ff0acd40000)
    libQt5Widgets.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Widgets.so.5 (0x00007ff0ac1a0000)
    libQt5Gui.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Gui.so.5 (0x00007ff0ab880000)
    libQt5Core.so.5 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libQt5Core.so.5 (0x00007ff0ab0a0000)
    libicui18n.so.56 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libicui18n.so.56 (0x00007ff0a9260000)
    libicuuc.so.56 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libicuuc.so.56 (0x00007ff0a8ea8000)
    libicudata.so.56 => /home/user/DevTools/Qt5.14.2/5.14.2/gcc_64/lib/libicudata.so.56 (0x00007ff0a74c0000)

把找出来的so库复制到albert的插件统计目录下，然后在写一个启动的脚本文件就可以了，大致如下，qtplugins用户放置用的插件

#!/bin/sh

export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/albert:$LD_LIBRARY_PATH
export QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/x86_64-linux-gnu/albert/qtplugins

albert