1 files changed, 22 insertions, 0 deletions
diff --git a/ext/dl/extconf.rb b/ext/dl/extconf.rb
index 8317ac35ad..e2b7af6410 100644
--- a/ext/dl/extconf.rb
+++ b/ext/dl/extconf.rb
@@ -8,8 +8,30 @@ $INSTALLFILES = [
   ["dl.h", "$(HDRDIR)"],
 ]
 
+if pkg_config("libffi")
+  # libffi closure api must be switched depending on the version
+  if system("pkg-config --atleast-version=3.0.9 libffi")
+    $defs.push(format('-DUSE_NEW_CLOSURE_API'))
+  end
+else
+  dir_config('ffi', '/usr/include', '/usr/lib')
+end
+
+unless have_header('ffi.h')
+  if have_header('ffi/ffi.h')
+    $defs.push(format('-DUSE_HEADER_HACKS'))
+  else
+    abort "ffi is missing"
+  end
+end
+
+unless have_library('ffi')
+  abort "ffi is missing"
+end
+
 check = true
 if( have_header("dlfcn.h") )
+
   have_library("dl")
   check &&= have_func("dlopen")
   check &&= have_func("dlclose")