compiler: don't assume that ATTRIBUTE_UNUSED is defined

Change-Id: Ia798b779cacd0d53edf4ed2e19c08ee0d07c7969 Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/604075 Reviewed-by: Ian Lance Taylor <[email protected]> Reviewed-by: Cherry Mui <[email protected]>
golang · Aug 7, 2024 · 6aa463f · 6aa463f
1 parent 5f6fae5
commit 6aa463f
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/go/lex.h b/go/lex.h
@@ -12,6 +12,12 @@
 #include "operator.h"
 #include "go-linemap.h"
 
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
+# define GO_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#else
+# define GO_ATTRIBUTE_UNUSED
+#endif
+
 struct Unicode_range;
 
 // The keywords.  These must be in sorted order, other than
@@ -561,7 +567,7 @@ class Lex
   gather_embed(const char*, const char*);
 
   // The input file name.
-  const char* input_file_name_ ATTRIBUTE_UNUSED;
+  const char* input_file_name_ GO_ATTRIBUTE_UNUSED;
   // The input file.
   FILE* input_file_;
   // The object used to keep track of file names and line numbers.