fastcgipp-3.0 manager.hpp std::condition_variable

[jasinco]

I downloaded the stable v3.0 archive and follow the standard compilation, but it jumped out an error that shows the include was incorrect

[  9%] Building CXX object CMakeFiles/fastcgipp.dir/src/manager.cpp.o
In file included from /home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp:30:
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/include/fastcgi++/manager.hpp:227:14: error: ‘condition_variable’ in namespace ‘std’ does not name a type
  227 |         std::condition_variable m_wake;
      |              ^~~~~~~~~~~~~~~~~~
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/include/fastcgi++/manager.hpp:44:1: note: ‘std::condition_variable’ is defined in header ‘<condition_variable>’; did you forget to ‘#include <condition_variable>’?
   43 | #include "fastcgi++/request.hpp"
  +++ |+#include <condition_variable>
   44 | 
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp: In member function ‘void Fastcgipp::Manager_base::terminate()’:
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp:65:5: error: ‘m_wake’ was not declared in this scope
   65 |     m_wake.notify_all();
      |     ^~~~~~
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp: In member function ‘void Fastcgipp::Manager_base::stop()’:
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp:73:5: error: ‘m_wake’ was not declared in this scope
   73 |     m_wake.notify_all();
      |     ^~~~~~
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp: In member function ‘void Fastcgipp::Manager_base::handler()’:
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp:320:9: error: ‘m_wake’ was not declared in this scope
  320 |         m_wake.wait(tasksLock);
      |         ^~~~~~
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp: In member function ‘void Fastcgipp::Manager_base::push(Fastcgipp::Protocol::RequestId, Fastcgipp::Message&&)’:
/home/jasinco/cybwg/subprojects/fastcgipp-3.0/src/manager.cpp:414:5: error: ‘m_wake’ was not declared in this scope
  414 |     m_wake.notify_one();
      |     ^~~~~~
make[2]: *** [CMakeFiles/fastcgipp.dir/build.make:202: CMakeFiles/fastcgipp.dir/src/manager.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:95: CMakeFiles/fastcgipp.dir/all] Error 2
make: *** [Makefile:146: all] Error 2

After I add #include <condition_variable> like what the log said, it works. Maybe just update the archive?