The library name in Debug mode must only be 'libname'd.a if the build
is with MSVC; all other builds never appended the 'd' suffix to the name.
This is also documented (see lib/README).
Fluid did not regenerate the .cxx and .h files if the .fl file was changed.
The DEPENDS keyword adds the necessary dependency.
The MAIN_DEPENDENCY keyword "also suggests to Visual Studio generators
where to hang the custom command" according to CMake docs.
Ported from branch-1.3, svn r11430.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11431 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
e86e4a6ab0