build-sys: split internal basic/ library from shared/

basic/      can be used by everything
            cannot use anything outside of basic/

libsystemd/ can use basic/
            cannot use shared/

shared/     can use libsystemd/

1 files changed, 6 insertions, 0 deletions

diff --git a/src/basic/siphash24.h b/src/basic/siphash24.h
new file mode 100644
index 0000000000..62e1168a79
--- /dev/null
+++ b/src/basic/siphash24.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#include <inttypes.h>
+#include <sys/types.h>
+
+void siphash24(uint8_t out[8], const void *in, size_t inlen, const uint8_t k[16]);