Add carla_get_library_filename/folder functions, needed for LMMS

source/backend/CarlaHost.h

@@ -994,6 +994,16 @@ CARLA_EXPORT const char* carla_get_host_osc_url_tcp();
  */
 CARLA_EXPORT const char* carla_get_host_osc_url_udp();
 
+/*!
+ * Get the current carla library filename.
+ */
+CARLA_EXPORT const char* carla_get_library_filename();
+
+/*!
+ * Get the folder where the current use carla library resides.
+ */
+CARLA_EXPORT const char* carla_get_library_folder();
+
 /** @} */
 
 #endif /* CARLA_HOST_H_INCLUDED */

source/backend/CarlaStandalone.cpp

@@ -73,7 +73,7 @@ struct CarlaBackendStandalone {
         engineOptions.preferUiBridges     = false;
 
         using juce::File;
-        File binaryDir(File::getSpecialLocation(File::currentApplicationFile).getParentDirectory());
+        File binaryDir(File::getSpecialLocation(File::currentExecutableFile).getParentDirectory());
         engineOptions.binaryDir   = carla_strdup_safe(binaryDir.getFullPathName().toRawUTF8());
         engineOptions.resourceDir = carla_strdup_safe(binaryDir.getChildFile("resources").getFullPathName().toRawUTF8());
 #else
@@ -2428,6 +2428,38 @@ const char* carla_get_host_osc_url_udp()
 
 // -------------------------------------------------------------------------------------------------------------------
 
+const char* carla_get_library_filename()
+{
+    carla_debug("carla_get_library_filename()");
+
+    static CarlaString ret;
+
+    if (ret.isEmpty())
+    {
+        using juce::File;
+        ret = File(File::getSpecialLocation(File::currentExecutableFile)).getFullPathName().toRawUTF8();
+    }
+
+    return ret;
+}
+
+const char* carla_get_library_folder()
+{
+    carla_debug("carla_get_library_folder()");
+
+    static CarlaString ret;
+
+    if (ret.isEmpty())
+    {
+        using juce::File;
+        ret = File(File::getSpecialLocation(File::currentExecutableFile).getParentDirectory()).getFullPathName().toRawUTF8();
+    }
+
+    return ret;
+}
+
+// -------------------------------------------------------------------------------------------------------------------
+
 #include "CarlaPluginUI.cpp"
 #include "CarlaDssiUtils.cpp"
 #include "CarlaStateUtils.cpp"

source/backend/engine/CarlaEngineNative.cpp

@@ -607,7 +607,13 @@ public:
             delete[] pData->options.binaryDir;
 
         pData->options.resourceDir = carla_strdup(pHost->resourceDir);
-        pData->options.binaryDir   = carla_strdup(File(pHost->resourceDir).getParentDirectory().getFullPathName().toRawUTF8());
+
+#ifndef CARLA_PLUGIN_EXPORT
+        if (gNeedsJuceHandling)
+            pData->options.binaryDir = carla_strdup(carla_get_library_folder());
+        else
+#endif
+            pData->options.binaryDir = carla_strdup(File(pHost->resourceDir).getParentDirectory().getFullPathName().toRawUTF8());
 
         setCallback(_ui_server_callback, this);
     }