1 files changed, 14 insertions, 0 deletions
diff --git a/ext/fiddle/extconf.rb b/ext/fiddle/extconf.rb
index a9cdcc251f..9b9803f65b 100644
--- a/ext/fiddle/extconf.rb
+++ b/ext/fiddle/extconf.rb
@@ -19,6 +19,20 @@ end
 
 have_header 'sys/mman.h'
 
+if have_header "dlfcn.h"
+  have_library "dl"
+
+  %w{ dlopen dlclose dlsym }.each do |func|
+    abort "missing function #{func}" unless have_func(func)
+  end
+
+  have_func "dlerror"
+elsif have_header "windows.h"
+  %w{ LoadLibrary FreeLibrary GetProcAddress }.each do |func|
+    abort "missing function #{func}" unless have_func(func)
+  end
+end
+
 config = File.read(RbConfig.expand(File.join($arch_hdrdir, "ruby/config.h")))
 types = {"SIZE_T"=>"SSIZE_T", "PTRDIFF_T"=>nil, "INTPTR_T"=>nil}
 types.each do |type, signed|