What flags to compile without CMake, only with g++ via command line?

[terroo]

I tried

g++ -I/usr/local/include/ftxui main.cpp

But without success ...

[ArthurSonzogni]

I highly recommend using cmake. If you don't, here is the answer:

Assuming FTXUI is installed under /usr/local:

# Build:
/usr/bin/c++ -c -I/usr/local/include -std=c++17 -o main.cpp.o  main.cpp

# Link:
/usr/bin/c++ -o main main.cpp.o /usr/local/lib/ftxui-component.a /usr/local/lib/ftxui-dom.a ftxui-screen.a -lpthread

Or combined:

/usr/bin/c++ -I/usr/local/include -std=c++17 -o main main.cpp /usr/local/lib/ftxui-component.a /usr/local/lib/ftxui-dom.a ftxui-screen.a -lpthread 

[terroo]

Yes, I intend to use it with CMake, but for development I believe that a simple Makefile is faster and easier. So I tried, but I got the output below:

/usr/bin/c++ -o saida using-ftxui.cpp /usr/local/lib/ftxui-component.a /usr/local/lib/ftxui-dom.a ftxui-screen.a -lpthread
/usr/lib/gcc/x86_64-pc-linux-gnu/11.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: could not find /usr/local/lib/ftxui-component.a: File or directory does not exist
/usr/lib/gcc/x86_64-pc-linux-gnu/11.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: could not find /usr/local/lib/ftxui-dom.a: File or directory does not exist
/usr/lib/gcc/x86_64-pc-linux-gnu/11.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: could not find ftxui-screen.a: File or directory does not exist
collect2: error: ld returned 1 exit status

[ArthurSonzogni]

If you intend to use cmake, it would be faster to use:
https://github.com/ArthurSonzogni/ftxui-starter

About your issue, it means it could not find /usr/local/lib/ftxui-component.a. Did you installed FTXUI at this location?