x86_64-managarm-gcc -pthread  -Wall -Wextra ctermid.c -o ctermid -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
ctermid.c: In function ‘main’:
ctermid.c:9:21: error: ‘L_ctermid’ undeclared (first use in this function)
    9 |         char buffer[L_ctermid];
      |                     ^~~~~~~~~
ctermid.c:9:21: note: each undeclared identifier is reported only once for each function it appears in
ctermid.c:10:24: error: implicit declaration of function ‘ctermid’ [-Wimplicit-function-declaration]
   10 |         char* result = ctermid(buffer);
      |                        ^~~~~~~
ctermid.c:9:14: warning: unused variable ‘buffer’ [-Wunused-variable]
    9 |         char buffer[L_ctermid];
      |              ^~~~~~