4 files changed, 18 insertions, 15 deletions
diff --git a/build/has/max-align-t.c b/build/has/_Fork.c
index 96165ce..4d7fbd3 100644
--- a/build/has/max-align-t.c
+++ b/build/has/_Fork.c
@@ -1,8 +1,8 @@
 // Copyright © Tavian Barnes <tavianator@tavianator.com>
 // SPDX-License-Identifier: 0BSD
 
-#include <stddef.h>
+#include <unistd.h>
 
 int main(void) {
-	return _Alignof(max_align_t);
+	return _Fork();
 }
diff --git a/build/has/attribute-format-syslog.c b/build/has/attribute-format-syslog.c
deleted file mode 100644
index ce988e5..0000000
--- a/build/has/attribute-format-syslog.c
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright © Tavian Barnes <tavianator@tavianator.com>
-// SPDX-License-Identifier: 0BSD
-
-#include <stdio.h>
-
-__attribute__((format(syslog, 1, 2)))
-static int foo(const char *format, ...) {
-	return 0;
-}
-
-int main(void) {
-	return foo("%s: %m\n", "main()");
-}
diff --git a/build/has/builtin-riscv-pause.c b/build/has/builtin-riscv-pause.c
new file mode 100644
index 0000000..24b0675
--- /dev/null
+++ b/build/has/builtin-riscv-pause.c
@@ -0,0 +1,7 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+int main(void) {
+	__builtin_riscv_pause();
+	return 0;
+}
diff --git a/build/has/tcgetwinsize.c b/build/has/tcgetwinsize.c
new file mode 100644
index 0000000..d25d12b
--- /dev/null
+++ b/build/has/tcgetwinsize.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <termios.h>
+
+int main(void) {
+	struct winsize ws;
+	return tcgetwinsize(0, &ws);
+}