Remove usage of ZSTD_CLEVEL_DEFAULT define.

2019-07-09  Martin Liska  <mliska@suse.cz>

	* lto-compress.c (lto_normalized_zstd_level): Do not use
	ZSTD_CLEVEL_DEFAULT as it is not default in old releases
	of libzstd.  One can use 0 as a default compression level.

From-SVN: r273263

gcc/ChangeLog

 2019-07-09  Martin Liska  <mliska@suse.cz>
 
+	* lto-compress.c (lto_normalized_zstd_level): Do not use
+	ZSTD_CLEVEL_DEFAULT as it is not default in old releases
+	of libzstd.  One can use 0 as a default compression level.
+
+2019-07-09  Martin Liska  <mliska@suse.cz>
+
 	* doc/invoke.texi: Add link from -fprofile-dir option.
 	Use better wording for 'gcno filename'.
 

gcc/lto-compress.c

@@ -115,13 +115,10 @@ lto_normalized_zstd_level (void)
 {
   int level = flag_lto_compression_level;
 
-  if (level != ZSTD_CLEVEL_DEFAULT)
-    {
-      if (level < 1)
-	level = 1;
-      else if (level > ZSTD_maxCLevel ())
-	level = ZSTD_maxCLevel ();
-    }
+  if (level < 0)
+    level = 0;
+  else if (level > ZSTD_maxCLevel ())
+    level = ZSTD_maxCLevel ();
 
   return level;
 }