1 files changed, 18 insertions, 0 deletions
diff --git a/jni/ruby/ext/gdbm/extconf.rb b/jni/ruby/ext/gdbm/extconf.rb
new file mode 100644
index 0000000..389bfb6
--- /dev/null
+++ b/jni/ruby/ext/gdbm/extconf.rb
@@ -0,0 +1,18 @@
+require 'mkmf'
+
+dir_config("gdbm")
+if have_library("gdbm", "gdbm_open") and
+   have_header("gdbm.h")
+  checking_for("sizeof(DBM) is available") {
+    if try_compile(<<SRC)
+#include <gdbm.h>
+
+const int sizeof_DBM = (int)sizeof(DBM);
+SRC
+      $defs << '-DDBM_SIZEOF_DBM=sizeof(DBM)'
+    else
+      $defs << '-DDBM_SIZEOF_DBM=0'
+    end
+  }
+  create_makefile("gdbm")
+end