Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE) 

使用cmake ..

有时候会遇到如下问题：

Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)_c++

 

$ cmake ..

-- The CXX compiler identification is GNU 11.2.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- clang-tidy found: /usr/bin/clang-tidy
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
Doxygen need to be installed to generate the doxygen documentation
-- Configuring done
-- Generating done

安装doxygen即可。

例如ubuntu：

sudo apt install doxygen

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Suggested packages:
  doxygen-latex doxygen-doc doxygen-gui
The following NEW packages will be installed:
  doxygen
0 upgraded, 1 newly installed, 0 to remove and 52 not upgraded.
Need to get 4,620 kB of archives.
After this operation, 17.9 MB of additional disk space will be used.
Get:1 http://mirrors.aliyun.com/ubuntu jammy/universe amd64 doxygen amd64 1.9.1-2ubuntu2 [4,620 kB]
Fetched 4,620 kB in 3s (1,691 kB/s)
Selecting previously unselected package doxygen.
(Reading database ... 175581 files and directories currently installed.)
Preparing to unpack .../doxygen_1.9.1-2ubuntu2_amd64.deb ...
Unpacking doxygen (1.9.1-2ubuntu2) ...
Setting up doxygen (1.9.1-2ubuntu2) ...

然后：

Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)_doxygen_02

什么是doxygen？
从源代码生成文档
Doxygen 是从带注释的 C++ 源代码生成文档的事实上的标准工具，但它也支持其他流行的编程语言，例如 C、Objective-C、C#、PHP、Java、Python、IDL（Corba、Microsoft 和 UNO/OpenOffice 风格） )、Fortran，在某种程度上也支持D. Doxygen 也支持硬件描述语言VHDL。

Doxygen 可以通过三种方式实现：

它可以从一组文档源文件中生成在线文档浏览器（HTML）和/或离线参考手册（$\mbox{\LaTeX}$）。还支持在 RTF (MS-Word)、PostScript、超链接 PDF、压缩 HTML 和 Unix 手册页中生成输出。文档直接从源代码中提取，这使得文档与源代码保持一致变得更加容易。
可以配置 doxygen 以从未记录的源文件中提取代码结构。这对于在大型源代码分发中快速找到您的方式非常有用。 Doxygen 还可以通过包括依赖图、继承图和协作图的方式将各种元素之间的关系可视化，这些都是自动生成的。
还可以使用 doxygen 创建普通文档（就像我为 doxygen 用户手册和网站所做的那样）。
Doxygen 是在 Mac OS X 和 Linux 下开发的，但设置为高度便携。因此，它也可以在大多数其他 Unix 风格上运行。此外，还有适用于 Windows 的可执行文件。

ftxui：

zhangrelay@LAPTOP-5REQ7K1L:~/cppcode/ftxui-starter-master/build$ make
[  3%] Building CXX object _deps/ftxui-build/CMakeFiles/screen.dir/src/ftxui/screen/box.cpp.o
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[ 12%] Linking CXX static library libftxui-screen.a
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[ 96%] Linking CXX static library libftxui-component.a
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[100%] Building CXX object CMakeFiles/ftxui-starter.dir/src/main.cpp.o
[100%] Linking CXX executable ftxui-starter
[100%] Built target ftxui-starter

Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)_ubuntu_03