Fix AMD CoMGR loading

device/comgrctx.cpp

@@ -34,7 +34,7 @@ bool Comgr::LoadLib() {
   static constexpr const char* ComgrLibName =
     LP64_SWITCH(WINDOWS_SWITCH("amd_comgr32.dll", "libamd_comgr32.so.2"),
                 WINDOWS_SWITCH("amd_comgr.dll", "libamd_comgr.so.2"));
-  cep_.handle = Os::loadLibrary(ComgrLibName);
+  cep_.handle = Os::loadLibrary(ComgrLibName, /*global*/true);
   if (nullptr == cep_.handle) {
     ClPrint(amd::LOG_ERROR, amd::LOG_CODE, "Failed to load COMGR library.");
     return false;

os/os.cpp

@@ -37,7 +37,7 @@
 
 namespace amd {
 
-void* Os::loadLibrary(const char* libraryname) {
+void* Os::loadLibrary(const char* libraryname, bool global) {
   void* handle;
 
   // Try with the system library prefix and extension instead.
@@ -73,7 +73,7 @@ void* Os::loadLibrary(const char* libraryname) {
 #endif
   }
 
-  handle = Os::loadLibrary_(libraryname);
+  handle = Os::loadLibrary_(libraryname, global);
   if (handle != NULL) {
     return handle;
   }
@@ -96,7 +96,7 @@ void* Os::loadLibrary(const char* libraryname) {
   }
   str.append(Os::libraryExtension());
 
-  handle = Os::loadLibrary_(str.c_str());
+  handle = Os::loadLibrary_(str.c_str(), global);
   if (handle != NULL || str.find(fileSeparator()) != std::string::npos) {
     return handle;
   }

os/os.hpp

@@ -135,7 +135,7 @@ class Os : AllStatic {
 
  private:
   //! Load the shared library named by \a filename
-  static void* loadLibrary_(const char* filename);
+  static void* loadLibrary_(const char* filename, bool global);
 
  public:
   //! Initialize the Os package.
@@ -280,7 +280,8 @@ class Os : AllStatic {
   typedef bool (*SymbolCallback)(std::string, const void*, void*);
 
   //! Load the shared library named by \a filename
-  static void* loadLibrary(const char* filename);
+  static void* loadLibrary(const char* filename, bool global=false);
+
   //! Unload the shared library.
   static void unloadLibrary(void* handle);
   //! Return the address of the function identified by \a name.

os/os_posix.cpp

@@ -174,8 +174,10 @@ static void __exit() { Os::tearDown(); }
 
 void Os::tearDown() { Thread::tearDown(); }
 
-void* Os::loadLibrary_(const char* filename) {
-  return (*filename == '\0') ? NULL : ::dlopen(filename, RTLD_LAZY);
+void* Os::loadLibrary_(const char* filename, bool global) {
+  int flags = RTLD_LAZY;
+  if (global) flags |= RTLD_GLOBAL;
+  return (*filename == '\0') ? NULL : ::dlopen(filename, flags);
 }
 
 void Os::unloadLibrary(void* handle) { ::dlclose(handle); }

os/os_win32.cpp

@@ -97,7 +97,7 @@ __declspec(allocate(".CRT$XTU")) void (*__exit)(void) = Os::tearDown;
 
 void Os::tearDown() { Thread::tearDown(); }
 
-void* Os::loadLibrary_(const char* filename) {
+void* Os::loadLibrary_(const char* filename, bool global) {
   if (filename != NULL) {
     HMODULE hModule = ::LoadLibrary(filename);
     return hModule;