require ruby development package

wscript

@@ -4,9 +4,11 @@ def options(opt):
 def configure(conf):
     conf.load("compiler_cxx")
     conf.check(header_name = "getopt.h")
+    conf.check_cfg(package = "ruby", args = "--cflags --libs", uselib_store = "ruby")
 
 def build(bld):
     bld(features = "cxx cxxprogram",
         target = "svi",
         source = bld.path.ant_glob("src/**/*.cc"),
-        cxxflags = ["-Wall", "-std=gnu++14"])
+        cxxflags = ["-Wall", "-std=gnu++14"],
+        uselib = ["ruby"])