add jerbuild

ober

6f4d6273785190e23b59b9969c592f331ff1b5c8

diff --git a/.jerbuild b/.jerbuild
new file mode 100644
index 0000000..1b473f4
--- /dev/null
+++ b/.jerbuild
@@ -0,0 +1,7 @@
+;; Build jawk with a standalone jerbuild binary.
+
+(entry "bin/jawk-program.ss")
+(output "jawk")
+(requires "cc")
+(notes "Pure Jerboa build path. The legacy cross scripts link jerboa-native-rs with tls,sqlite,crypto for static runtime coverage, but DuckDB is not required.")
+(libdirs "lib")