diff --git a/src/dir.c b/src/dir.c
index 3e94b98..cfaa6a2 100644
--- a/src/dir.c
+++ b/src/dir.c
@@ -1331,10 +1331,9 @@ local_stat (const char *path, struct stat *buf)
 
 /* Similarly for lstat.  */
 #if !defined(lstat) && !defined(WINDOWS32) || defined(VMS)
-# ifndef VMS
-#  ifndef HAVE_SYS_STAT_H
+// mes-libc implements but does not declare lstat
+# if (!defined(VMS) && !defined(HAVE_SYS_STAT_H)) || defined(__TINYC__)
 int lstat (const char *path, struct stat *sbuf);
-#  endif
 # else
     /* We are done with the fake lstat.  Go back to the real lstat */
 #   ifdef lstat
diff --git a/src/job.c b/src/job.c
index ea88561..8388a82 100644
--- a/src/job.c
+++ b/src/job.c
@@ -2052,7 +2052,8 @@ job_next_command (struct child *child)
 static int
 load_too_high (void)
 {
-#if defined(__MSDOS__) || defined(VMS) || defined(_AMIGA) || defined(__riscos__)
+// mes-libc does not support getloadavg
+#if defined(__MSDOS__) || defined(VMS) || defined(_AMIGA) || defined(__riscos__) || defined (__TINYC__)
   return 1;
 #else
   static double last_sec;
diff --git a/src/main.c b/src/main.c
index a9d3a64..664d40f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2770,7 +2770,7 @@ main (int argc, char **argv, char **envp)
               char *b = alloca (40);
               sprintf (b, "MAKE_RESTARTS=%s%u",
                        OUTPUT_IS_TRACED () ? "-" : "", restarts);
-              putenv (b);
+              // mes-libc does not support putenv
             }
 
           fflush (stdout);
diff --git a/src/misc.c b/src/misc.c
index eb14f40..bffca82 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -653,7 +653,8 @@ get_tmppath ()
 
 # ifdef HAVE_MKTEMP
   path = get_tmptemplate ();
-  if (*mktemp (path) == '\0')
+  // tinycc: "src/misc.c:656: error: pointer expected"
+  if (!strcmp(mktemp (path), ""))
     {
       OSS (error, NILF,
            _("cannot generate temp path from %s: %s"), path, strerror (errno));