* cppfiles.c (search_from): Special case the empty string.

From-SVN: r40236

gcc/ChangeLog

 2001-03-04  Neil Booth  <neil@daikokuya.demon.co.uk>
 
+	* cppfiles.c (search_from): Special case the empty string.
+
+2001-03-04  Neil Booth  <neil@daikokuya.demon.co.uk>
+
 	* cppfiles.c (_cpp_execute_include): Don't make a null-terminated
 	copy of the filename.  Don't use CPP_PREV_BUFFER.  Don't call
 	strlen or strcpy; we already know the length.

gcc/cppfiles.c

@@ -804,7 +804,11 @@ search_from (pfile, inc)
   if (CPP_OPTION (pfile, ignore_srcdir))
     return CPP_OPTION (pfile, quote_include);
 
-  dlen = basename (inc->name) - inc->name;
+  /* basename () on Solaris returns "." for an empty string.  */
+  dlen = 0;
+  if (inc->name[0] != '\0')
+    dlen = basename (inc->name) - inc->name;
+
   if (dlen)
     {
       /* We don't guarantee NAME is null-terminated.  This saves