matlab: apply macos path fix

+iri2016/cmake.m

@@ -4,6 +4,8 @@ function cmake(srcdir)
   srcdir (1,1) string
 end
 
+fix_macos()
+
 cmd = "cmake --version";
 ret = system(cmd);
 if ret ~= 0
@@ -17,3 +19,25 @@ function cmake(srcdir)
 assert(ret==0, 'failed to build IRI')
 
 end
+
+
+function fix_macos()
+
+%% MacOS PATH workaround
+% Matlab does not seem to load .zshrc or otherwise pickup shell "export" like
+% Matlab on Linux or Windows does, so we apply these MacOS-specific workaround
+if ~ismac
+  return
+end
+
+sys_path = getenv("PATH");
+needed_paths = "/usr/local/bin";
+for np = needed_paths
+  if isfolder(np) && ~contains(sys_path, np)
+    sys_path = np + pathsep + sys_path;
+  end
+end
+
+setenv('PATH', sys_path)
+
+end % function