mescc: Support gcc-3.0: Implement alarm, setitimer.

lib/binutils.c

@@ -90,14 +90,6 @@ perror (char const *message)
   fprintf (stderr, "%s: %s\n", strerror (errno), message);
 }
 
-int
-setitimer (int which, struct itimerval const *new,
-           struct itimerval *old)
-{
-  eputs ("setitimer stub\n");
-  return 0;
-}
-
 int
 sigsetmask (int x)
 {

lib/gcc.c

@@ -22,6 +22,7 @@
 #include <stdint.h>
 #include <time.h>
 #include <sys/times.h>
+#include <sys/time.h>
 
 FILE *
 freopen (char const *file_name, char const *opentype, FILE *stream)
@@ -88,3 +89,19 @@ atexit (void (*function) (void))
   __call_at_exit = function;
 }
 
+unsigned int
+alarm (unsigned int seconds)
+{
+#if !__MESC__
+  struct itimerval old;
+  struct itimerval new;
+  new.it_interval.tv_usec = 0;
+  new.it_interval.tv_sec = 0;
+  new.it_value.tv_usec = 0;
+  new.it_value.tv_sec = (long int) seconds;
+  if (setitimer (ITIMER_REAL, &new, &old) < 0)
+    return 0;
+  return old.it_value.tv_sec;
+#endif
+}
+

lib/linux+gnu.c

@@ -32,6 +32,7 @@
 #define SYS_dup2      0x3f
 #define SYS_getrusage 0x4d
 #define SYS_lstat     0x6b
+#define SYS_setitimer 0x68
 #define SYS_fstat     0x6c
 #define SYS_nanosleep 0xa2
 
@@ -137,6 +138,13 @@ nanosleep (const struct timespec *requested_time,
   return _sys_call2 (SYS_nanosleep, (int)requested_time, (int)remaining);
 }
 
+int
+setitimer (int which, struct itimerval const *new,
+          struct itimerval *old)
+{
+  return _sys_call3 (SYS_setitimer, (int)which, (int)new, (int)old);
+}
+
 int
 fstat (int fd, struct stat *statbuf)
 {