+/** Creates a temporary file name a'la tmpnam which avoids the bugs
+ in cygwin wrt c:\tmp.
+ Scans, in order: TMP, TEMP, TMPDIR, else uses tmpfile().
+*/
+char *
+tempfilename (void)
+{
+#if !defined(_MSC_VER)
+ const char *tmpdir = NULL;
+ if (getenv ("TMP"))
+ tmpdir = getenv ("TMP");
+ else if (getenv ("TEMP"))
+ tmpdir = getenv ("TEMP");
+ else if (getenv ("TMPDIR"))
+ tmpdir = getenv ("TMPDIR");
+ if (tmpdir)
+ {
+ char *name = tempnam (tmpdir, "sdcc");
+ if (name)
+ {
+ return name;
+ }
+ }
+#endif
+ return tmpnam (NULL);
+}
+