I did following 1. main.c
#include <stdio.h> int add(int a, int b) { return a + b; } 2. gcc -fPIC -c main.c 3. gcc -shared -o main.so main.o 4. copied main.so file to content folder. 5. started my extension and called on following code in html in the extension const {utils:Cu} = Components; alert("loading comp"); Cu.import("resource://gre/modules/XPCOMUtils.jsm"); Cu.import("resource://gre/modules/Services.jsm"); Cu.import("resource://gre/modules/ctypes.jsm"); alert("import done"); const {classes:Ccc} = Components; try { var lib = ctypes.open("chrome://helloworld/content/main.so"); alert("lib=" + lib); var addc = lib.declare("add" , ctypes.default_abi, ctypes.int32_t, ctypes.int32_t, ctypes.int32_t); alert("addc" + addc(3,4)); } catch (e) { alert(e); } I get error that it couldnot open library chrome://helloworld/content/main.so My manifest file is following content helloworld content/ resource helloworld content/ overlay chrome://browser/content/browser.xul chrome://helloworld/content/overlay.xul locale helloworld en-US locale/en-US/ skin helloworld classic/1.0 skin/ style chrome://global/content/customizeToolbar.xul chrome://helloworld/skin/overlay.css What am i missing.. i put that in components folder also but it didnt help. How to debug this issue? _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform