macos: rclaspell: get the dlopen to work

src/aspell/rclaspell.cpp

@@ -71,12 +71,16 @@ static std::mutex o_aapi_mutex;
 	badnames += #NM + string(" ");					\
     }
 
-static const char *aspell_lib_suffixes[] = {
+static const vector<string> aspell_lib_suffixes {
-  ".so",
+#if defined(__APPLE__) 
-  ".so.15",
+        ".15.dylib",
-  ".so.16"
+        ".dylib",
+#else
+        ".so",
+        ".so.15",
+        ".so.16",
+#endif
 };
-static const unsigned int nlibsuffs  = sizeof(aspell_lib_suffixes) / sizeof(char *);
 
 // Stuff that we don't wish to see in the .h (possible sysdeps, etc.)
 class AspellData {
@@ -160,16 +164,39 @@ bool Aspell::init(string &reason)
 	return false;
     }
 
+
+    // Don't know what with Apple and (DY)LD_LIBRARY_PATH. Does not work
+    // So we look in all ../lib in the PATH...
+#if defined(__APPLE__) 
+    vector<string> path;
+    const char *pp = getenv("PATH");
+    if (pp) {
+        stringToTokens(pp, path, ":");
+    }
+#endif
+    
     reason = "Could not open shared library ";
     string libbase("libaspell");
     string lib;
-    for (unsigned int i = 0; i < nlibsuffs; i++) {
+    for (const auto& suff : aspell_lib_suffixes) {
-        lib = libbase + aspell_lib_suffixes[i];
+        lib = libbase + suff;
         reason += string("[") + lib + "] ";
         if ((m_data->m_handle = dlopen(lib.c_str(), RTLD_LAZY)) != 0) {
             reason.erase();
             goto found;
         }
+#if defined(__APPLE__) 
+        // Above was the normal lookup: let dlopen search the directories.
+        // Here is for Apple. Also look at all ../lib along the PATH
+        for (const auto& dir : path) {
+            string lib1 = path_canon(dir + "/../lib/" + lib);
+            if ((m_data->m_handle = dlopen(lib1.c_str(), RTLD_LAZY)) != 0) {
+                reason.erase();
+                lib=lib1;
+                goto found;
+            }
+        }
+#endif
     }
     
  found: