cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/fexecve.c -o unistd/fexecve -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
unistd/fexecve.c:5:51: error: use of undeclared identifier 'fexecve'; did you mean 'execve'?
    5 | int (*foo)(int, char *const [], char *const []) = fexecve;
      |                                                   ^~~~~~~
      |                                                   execve
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/unistd.h:445:6: note: 'execve' declared here
  445 | int      execve(const char * __file, char * const * __argv, char * const * __envp) __WATCHOS_PROHIBITED __TVOS_PROHIBITED;
      |          ^
unistd/fexecve.c:5:7: error: incompatible function pointer types initializing 'int (*)(int, char *const *, char *const *)' with an expression of type 'int (const char *, char *const *, char *const *)' [-Wincompatible-function-pointer-types]
    5 | int (*foo)(int, char *const [], char *const []) = fexecve;
      |       ^                                           ~~~~~~~
2 errors generated.