fltk-devel won't compile in OSX 10.8

[vic@…]

I have not been able to compile fltk-debel in OSX 10.8 (Mountain Lion). All dependencies have been installed. The problem occurs in the build stage. Here is the error.

:info:build filename_list.cxx: In function ‘int fl_filename_list(const char*, dirent*, int (*)(dirent, dirent))’: :info:build filename_list.cxx:113: error: invalid conversion from ‘int (*)(const void*, const void*)’ to ‘int (*)(const dirent, const dirent)’ :info:build filename_list.cxx:113: error: initializing argument 4 of ‘int scandir(const char*, dirent*, int (*)(const dirent*), int (*)(const dirent, const dirent))’ :info:build make[1]: * [filename_list.o] Error 1

I am attaching the main log.