1 files changed, 6 insertions, 6 deletions

diff --git a/src/opt.c b/src/opt.c
index d81b7d8..ccd76c8 100644
--- a/src/opt.c
+++ b/src/opt.c
@@ -370,7 +370,7 @@ struct bfs_opt {
 };
 
 /** Log an optimization. */
-attr(printf(2, 3))
+_printf(2, 3)
 static bool opt_debug(struct bfs_opt *opt, const char *format, ...) {
 	if (bfs_debug_prefix(opt->ctx, DEBUG_OPT)) {
 		for (int i = 0; i < opt->depth; ++i) {
@@ -388,7 +388,7 @@ static bool opt_debug(struct bfs_opt *opt, const char *format, ...) {
 }
 
 /** Log a recursive call. */
-attr(printf(2, 3))
+_printf(2, 3)
 static bool opt_enter(struct bfs_opt *opt, const char *format, ...) {
 	int depth = opt->depth;
 	if (depth > 0) {
@@ -408,7 +408,7 @@ static bool opt_enter(struct bfs_opt *opt, const char *format, ...) {
 }
 
 /** Log a recursive return. */
-attr(printf(2, 3))
+_printf(2, 3)
 static bool opt_leave(struct bfs_opt *opt, const char *format, ...) {
 	bool debug = false;
 	int depth = opt->depth;
@@ -432,7 +432,7 @@ static bool opt_leave(struct bfs_opt *opt, const char *format, ...) {
 }
 
 /** Log a shallow visit. */
-attr(printf(2, 3))
+_printf(2, 3)
 static bool opt_visit(struct bfs_opt *opt, const char *format, ...) {
 	int depth = opt->depth;
 	if (depth > 0) {
@@ -452,7 +452,7 @@ static bool opt_visit(struct bfs_opt *opt, const char *format, ...) {
 }
 
 /** Log the deletion of an expression. */
-attr(printf(2, 3))
+_printf(2, 3)
 static bool opt_delete(struct bfs_opt *opt, const char *format, ...) {
 	int depth = opt->depth;
 
@@ -614,7 +614,7 @@ static bool is_const(const struct bfs_expr *expr) {
 }
 
 /** Warn about an expression. */
-attr(printf(3, 4))
+_printf(3, 4)
 static void opt_warning(const struct bfs_opt *opt, const struct bfs_expr *expr, const char *format, ...) {
 	if (!opt->warn) {
 		return;