fix library loading by symblo

2 files changed, 12 insertions, 1 deletions

diff --git a/lib/ffi/library.rb b/lib/ffi/library.rb
index 85406c1..a88e6f1 100644
--- a/lib/ffi/library.rb
+++ b/lib/ffi/library.rb
@@ -123,7 +123,8 @@ module FFI
               end
 
               # TODO better library lookup logic
-              unless libname.to_s.start_with?("/")
+              libname = libname.to_s
+              unless libname.start_with?("/")
                 path = ['/usr/lib/','/usr/local/lib/'].find do |pth|
                   File.exist?(pth + libname)
                 end
diff --git a/spec/ffi/library_spec.rb b/spec/ffi/library_spec.rb
index 4359b93..c4900d3 100644
--- a/spec/ffi/library_spec.rb
+++ b/spec/ffi/library_spec.rb
@@ -96,6 +96,16 @@ describe "Library" do
       }.not_to raise_error
     end
 
+    it "loads library using symbol" do
+      expect {
+        expect(Module.new do |m|
+          m.extend FFI::Library
+          ffi_lib :c
+          attach_function :getpid, [ ], :uint
+        end.getpid).to eq(Process.pid)
+      }.not_to raise_error
+    end
+
     it "attach_function :getpid from [ 'c', 'libc.so.6'] " do
       expect {
         expect(Module.new do |m|