build/flags: Infrastructure to detect compiler flag support

Use it to detect -MD -MP support.

1 files changed, 8 insertions, 0 deletions

diff --git a/build/flags/deps.c b/build/flags/deps.c
new file mode 100644
index 0000000..1c8c309
--- /dev/null
+++ b/build/flags/deps.c
@@ -0,0 +1,8 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+/// _CPPFLAGS += -MD -MP
+
+int main(void) {
+	return 0;
+}