clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_wait/siginfo_t.c -o sys_wait/siginfo_t -D_POSIX_C_SOURCE=202405L  -lm  -lintl
In file included from sys_wait/siginfo_t.c:1:
/usr/include/sys/wait.h:175:1: error: unknown type name 'pid_t'
pid_t   wait(int *);
^
/usr/include/sys/wait.h:176:1: error: unknown type name 'pid_t'
pid_t   waitpid(pid_t, int *, int);
^
/usr/include/sys/wait.h:176:22: error: expected identifier
pid_t   waitpid(pid_t, int *, int);
                       ^
sys_wait/siginfo_t.c:2:1: error: unknown type name 'siginfo_t'
siginfo_t* foo;
^
4 errors generated.