Steam Deck: fails to build, missing headers

[Razwerkz]

What went wrong here?

g++ -g -O1 -std=c++11 -o overlay overlay.cpp gason.cpp json_message.cc socket.cc -lX11 -lXfixes -lXext -Wall
In file included from /usr/include/c++/12.2.0/x86_64-pc-linux-gnu/bits/c++config.h:655,
                 from /usr/include/c++/12.2.0/iostream:38,
                 from overlay.cpp:19:
/usr/include/c++/12.2.0/x86_64-pc-linux-gnu/bits/os_defines.h:39:10: fatal error: features.h: No such file or directory
   39 | #include <features.h>
      |          ^~~~~~~~~~~~
compilation terminated.
In file included from gason.h:24,
                 from gason.cpp:22:
/usr/lib/gcc/x86_64-pc-linux-gnu/12.2.0/include/stdint.h:9:16: fatal error: stdint.h: No such file or directory
    9 | # include_next <stdint.h>
      |                ^~~~~~~~~~
compilation terminated.
In file included from /usr/include/c++/12.2.0/x86_64-pc-linux-gnu/bits/c++config.h:655,
                 from /usr/include/c++/12.2.0/string:38,
                 from json_message.cc:16:
/usr/include/c++/12.2.0/x86_64-pc-linux-gnu/bits/os_defines.h:39:10: fatal error: features.h: No such file or directory
   39 | #include <features.h>
      |          ^~~~~~~~~~~~
compilation terminated.
In file included from socket.cc:15:
socket.hh:22:10: fatal error: unistd.h: No such file or directory
   22 | #include <unistd.h>
      |          ^~~~~~~~~~
compilation terminated.
make: *** [Makefile:2: overlay] Error 1

[keysmashes]

not a clue, I'm afraid! it's been ages since I've worked on this, and I don't plan on developing it further, sorry.

[Razwerkz]

The saddest part of this is, before I reset my Steam Deck, I had everything working. I'm gonna be kicking myself for a while for not backing up my configuration.

[pan-mroku]

I've found this