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 <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
diff --git a/go/lex.h b/go/lex.h
index 701e5d4..452ef95 100644
--- 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 @@
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.
