11 files changed, 92 insertions, 2 deletions
diff --git a/build/has/aligned-alloc.c b/build/has/_Fork.c
index 4460038..4d7fbd3 100644
--- a/build/has/aligned-alloc.c
+++ b/build/has/_Fork.c
@@ -1,8 +1,8 @@
 // Copyright © Tavian Barnes <tavianator@tavianator.com>
 // SPDX-License-Identifier: 0BSD
 
-#include <stdlib.h>
+#include <unistd.h>
 
 int main(void) {
-	return !aligned_alloc(_Alignof(void *), sizeof(void *));
+	return _Fork();
 }
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/dprintf.c b/build/has/dprintf.c
new file mode 100644
index 0000000..c206fa3
--- /dev/null
+++ b/build/has/dprintf.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <stdio.h>
+
+int main(void) {
+	return dprintf(1, "%s\n", "Hello world!");
+}
diff --git a/build/has/io-uring-max-workers.c b/build/has/io-uring-max-workers.c
new file mode 100644
index 0000000..34ab5b7
--- /dev/null
+++ b/build/has/io-uring-max-workers.c
@@ -0,0 +1,11 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <liburing.h>
+
+int main(void) {
+	struct io_uring ring;
+	io_uring_queue_init(1, &ring, 0);
+	unsigned int values[] = {0, 0};
+	return io_uring_register_iowq_max_workers(&ring, values);
+}
diff --git a/build/has/pragma-nounroll.c b/build/has/pragma-nounroll.c
new file mode 100644
index 0000000..2bdae14
--- /dev/null
+++ b/build/has/pragma-nounroll.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+/// -Werror
+
+int main(void) {
+#pragma nounroll
+	for (int i = 0; i < 100; ++i);
+	return 0;
+}
diff --git a/build/has/pthread-set-name-np.c b/build/has/pthread-set-name-np.c
new file mode 100644
index 0000000..324aab9
--- /dev/null
+++ b/build/has/pthread-set-name-np.c
@@ -0,0 +1,10 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <pthread.h>
+#include <pthread_np.h>
+
+int main(void) {
+	pthread_set_name_np(pthread_self(), "name");
+	return 0;
+}
diff --git a/build/has/pthread-setname-np.c b/build/has/pthread-setname-np.c
new file mode 100644
index 0000000..a3b94c1
--- /dev/null
+++ b/build/has/pthread-setname-np.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <pthread.h>
+
+int main(void) {
+	return pthread_setname_np(pthread_self(), "name");
+}
diff --git a/build/has/sched-getaffinity.c b/build/has/sched-getaffinity.c
new file mode 100644
index 0000000..6f8fd98
--- /dev/null
+++ b/build/has/sched-getaffinity.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <sched.h>
+
+int main(void) {
+	cpu_set_t set;
+	return sched_getaffinity(0, sizeof(set), &set);
+}
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);
+}
diff --git a/build/has/tcsetwinsize.c b/build/has/tcsetwinsize.c
new file mode 100644
index 0000000..6717415
--- /dev/null
+++ b/build/has/tcsetwinsize.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <termios.h>
+
+int main(void) {
+	const struct winsize ws = {0};
+	return tcsetwinsize(0, &ws);
+}
diff --git a/build/has/timer-create.c b/build/has/timer-create.c
new file mode 100644
index 0000000..d5354c3
--- /dev/null
+++ b/build/has/timer-create.c
@@ -0,0 +1,9 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include <time.h>
+
+int main(void) {
+	timer_t timer;
+	return timer_create(CLOCK_REALTIME, NULL, &timer);
+}