Forward Declarations may be needed.

http://stackoverflow.com/questions/2133250/does-not-name-a-type-error

Remembering how to remember friend class C++

• Friendships are not symmetric – If class A is a friend of class B, class B is not automatically a friend of class A.
  "I thought you were my friend, but the feelings were not mutual."
• Friendships are not transitive – If class A is a friend of class B, and class B is a friend of class C, class A is not automatically a friend of class C.
  "Just because he is your friend doesn't make him my friend."
• Friendships are not inherited – A friend of class Base is not automatically a friend of class Derived and vice versa; equally if Base is a friend of another class, Derived is not automatically a friend and vice versa.
  "You've changed. You are not the person I used to know. I don't like you anymore."
  
  More: https://en.wikipedia.org/wiki/Friend_class

Trying SFGUI with pre-built library.

AHK SHORTCUT: [sfgui]
//SFGUI SETTINGS in CODE::BLOCKS:
//-----------------------------------------------------------------------------+
//  /Compiler settings\_______________                                         |
//  /#defines\________________________                                         |
//  SFGUI_STATIC                                                               |
//                                                                             |
//  /Linker settings\_________________                                         |
//  /Link libraries\__________________                                         |
//  libsfgui-s.a                                                               |
//                                                                             -
//  /Search directories\______________
//  /Compiler\________________________
//  C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include
//                                                                             -
//  /Search directories\______________                                         |
//  /Linker\__________________________                                         |
//  C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib    |
//-----------------------------------------------------------------------------+

//SFML SETTTINGS in CODE::BLOCKS: (Version 2.3 of SFML)
//You must also specify these settings since SFGUI is built on top of SFML:
//THE SETTINGS ARE VERY DIFFERENT DEPENDING ON WHAT VERSION OF SFML YOU USE!!!
//CONSULT THE CORRECT TUTORIAL FOR SETUP ON SFML'S SITE IF NOT USING 2.3
//-----------------------------------------------------------------------------+
//  /Compiler settings\_______________                                         |
//  /#defines\________________________                                         |
//  GLEW_STATIC                                                                |
//  SFML_STATIC                                                                |
//  UNICODE                                                                    |
//                                                                             |
//  /Linker settings\_________________                                         |
//  /Link libraries\__________________                                         |
//  sfml-graphics-s                                                            |
//  sfml-window-s                                                              |
//  sfml-network-s                                                             |
//  sfml-system-s                                                              |
//  winmm                                                                      |
//  freetype                                                                   |
//  ws2_32                                                                     |
//  gdi32                                                                      |
//  opengl32                                                                   |
//  jpeg                                                                       |
//                                                                             |
//  /Search directories\______________                                         |
//  /Compiler\________________________                                         |
//  SFML-2.3.2\GCC_TDM_SJLJ_32BIT\include                                      |
//                                                                             |
//  /Search directories\______________                                         |
//  /Linker\__________________________                                         |
//  SFML-2.3.2\GCC_TDM_SJLJ_32BIT\lib                                          |
//-----------------------------------------------------------------------------+

Results:
||=== Build: Release in SFGUI_TRY01 (compiler: GNU GCC With MinGW-w64 Debugger JMIM) ===|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Adjustment.hpp|19|error: looser throw specifier for 'virtual sfg::Adjustment::~Adjustment()'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Object.hpp|23|error:   overriding 'virtual sfg::Object::~Object() noexcept (true)'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Widget.hpp|43|error: looser throw specifier for 'virtual sfg::Widget::~Widget()'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Object.hpp|23|error:   overriding 'virtual sfg::Object::~Object() noexcept (true)'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Alignment.hpp|12|error: looser throw specifier for 'virtual sfg::Alignment::~Alignment()'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Misc.hpp|16|error:   overriding 'virtual sfg::Misc::~Misc() noexcept (true)'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Frame.hpp|13|error: looser throw specifier for 'virtual sfg::Frame::~Frame()'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Misc.hpp|16|error:   overriding 'virtual sfg::Misc::~Misc() noexcept (true)'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Image.hpp|13|error: looser throw specifier for 'virtual sfg::Image::~Image()'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Misc.hpp|16|error:   overriding 'virtual sfg::Misc::~Misc() noexcept (true)'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Label.hpp|13|error: looser throw specifier for 'virtual sfg::Label::~Label()'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\include\SFGUI\Misc.hpp|16|error:   overriding 'virtual sfg::Misc::~Misc() noexcept (true)'|
||=== Build failed: 12 error(s), 0 warning(s) (0 minute(s), 1 second(s)) ===|

Fix: Switch to compiler version 4.8.1
The compiler that comes with code::blocks has some type of error in it. See picture above.

And.... Back to the undefined reference errors I had in last post
when I tried to build SFGUI myself with cmake.
Actually, the cmake went alright after some troubleshooting.
But couldn't fix the errors when I ran mingw-make on the files
generated by cmake.

||=== Build: Release in SFGUI_TRY01 (compiler: GNU GCC With MinGW-w64 Debugger JMIM) ===|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(SFGUI.cpp.obj):SFGUI.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(SFGUI.cpp.obj):SFGUI.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(SFGUI.cpp.obj):SFGUI.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(Context.cpp.obj):Context.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_imp___ZN2sf5ColorC1Ehhhh'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_imp___ZN2sf5Color5WhiteE'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_imp___ZN2sf5Color5BlackE'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_imp___ZN2sf5Color5WhiteE'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_imp___ZN2sf5Color5BlackE'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_imp___ZN2sf5Color5WhiteE'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_imp___ZN2sf5Color5WhiteE'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| more undefined references to `_Unwind_SjLj_Resume' follow|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `__gxx_personality_sj0'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Register'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Unregister'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp|| undefined reference to `_Unwind_SjLj_Resume'|
C:\DEV\SDK\GAME_DEV\SFGUI\OFFICIAL_COMPILATIONS\TDM\SFGUI-TDM481x32\lib\libsfgui-s.a(BREW.cpp.obj):BREW.cpp:(.text$_ZN3sfg6Engine11SetPropertyIN2sf5ColorEEEbRKSsS5_RKT_[__ZN3sfg6Engine11SetPropertyIN2sf5ColorEEEbRKSsS5_RKT_]+0x24)||undefined reference to `__gxx_personality_sj0'|
||More errors follow but not being shown.|
||Edit the max errors limit in compiler options...|
||=== Build failed: 50 error(s), 0 warning(s) (0 minute(s), 5 second(s)) ===|

I really don't want to have "not made here" syndrome.
But it might be best to code my own UI on top of SFML...
Since I can get SFML working...

Have the UI run on a different EXE file?

https://en.wikipedia.org/wiki/Inter-process_communication

By putting the exe for the UI in another program that communicates with game, you
would not have to worry about different error handling systems being used for the
UI vs the rendering.

SFGUI How do I CMAKE?

So far, I've never been able to successfully use CMAKE.
I tried it with SFML and now SFGUI.
And I put in a lot of time trying to get it to work.

Feels kind of hackish to depend on pre-built builds of these libraries if that isn't the way it is
supposed to be done.

But, here are builds of SFGUI that I need:
https://www.nightlybuilds.ch/compiler/show/10/TDM-481-32/

SFGUI CMAKE trouble shoot

When using CMake, remove C:\DEV\PROG\Git\bin from path variable.
Because it contains sh.exe, and it messes up setup.

//ERROR:
CMake Error at cmake/Modules/FindSFML.cmake:306 (message):
  Could NOT find SFML (missing: SFML_GRAPHICS_LIBRARY SFML_WINDOW_LIBRARY
  SFML_SYSTEM_LIBRARY)
Call Stack (most recent call first):
  CMakeLists.txt:21 (find_package)

SOLUTION TO TRY: Environment variable setting:
SET:
SFML_ROOT     == C:\DEV\SDK\GAME_DEV\SFML\SOURCES\SFML-2.3.2\src\SFML
SFML_INCLUDE_DIR == C:\DEV\SDK\GAME_DEV\SFML\SOURCES\SFML-2.3.2\include
SFML_GRAPHICS_LIBRARY == C:\DEV\SDK\GAME_DEV\SFML\SOURCES\SFML-2.3.2\src\SFML\Graphics
SFML_WINDOW_LIBRARY   == C:\DEV\SDK\GAME_DEV\SFML\SOURCES\SFML-2.3.2\src\SFML\Window
SFML_SYSTEM_LIBRARY   == C:\DEV\SDK\GAME_DEV\SFML\SOURCES\SFML-2.3.2\src\SFML\System
//Maybe GRAPHICS,WINDOW,SYSTEM are relative paths to SFML_ROOT?

We are getting closer. Looks like freetype dependency is missing... I never recall having to setup freetype
when getting SFML to work. However, I did specify it in the build options for SFML and it just...
Magically worked.
Here is screen shot of my SFML linker settings. Notice the freetype.

Found freetype in SFML source folder here:
C:\DEV\SDK\GAME_DEV\SFML\SOURCES\SFML-2.3.2\extlibs\libs-msvc\x64

But... These are .lib files,  not .a files... I am worried.
.lib == windows
.a   == linux
From my understanding.Well, give it a shot.

CLOSER! But for some reason:
SFML_GRAPHICS_LIBRARY
SFML_WINDOW_LIBRARY
SFML_SYSTEM_LIBRARY
Are missing?? When I already set the environment variables for those.
And I can successfully echo it in the command prompt via:
$ echo %SFML_GRAPHICS_LIBRARY%

AH!
This post: http://sfgui.sfml-dev.de/forum/topic256-sfgui-doesnt-seem-to-work-with-sfml-21.html

Makes mention of the "advanced" tab. For some reason the flags I specified on command line were not picked up by CMAKE.

 Not sure what to do about the DEBUG libraries, since I don't have them. But hopefully I can omit them and be alright.
After hitting "GENERATE". I get lots of errors like this:

I think maybe I need to point to the sub-folder that contains the .h and .cpp files.
Editing SFML_GRAPHICS_LIBRARY, SFML_WINDOW_LIBRARY, SFML_SYSTEM_LIBRARY
to reflect this.

Actually.. Think those vars are good. Need to research the error:
"Targets may link only to libraries."

  Ah... Instead of using the SOURCE files... I need to use the compiled source.
I have a folder of offical cmake builds of SFML that I can reference for that:

 

Wonder if there is any chance that the freetype.a file exists in same folder.
Because the freetype.lib file scares me.
YES! It is here... Probably should change freetype to this path:
C:\DEV\SDK\GAME_DEV\SFML\OFFICIAL_COMPILATIONS\SFML-2.3.2\GCC_TDM_SJLJ_32BIT\lib\libfreetype.a
Also.. The .jpeg library was pointing to a .dll file in my JAVA installation folder... Yeah... That sounds
sketchy too. Fixed that as well. Here is the screen shot of the fix:


Okay... Configure and Generate...

Wow. Everything worked. At it did it all in a second.
I thought fancy progress bar stuff was going to happen...
Now what??

Time to reference more of the documentation:
http://sfgui.sfml-dev.de/p/docs/guide/installing

I am guessing since I have MinGw path in my environment variables...
CDing into my jmBuild directory and running mingw-make should be enough.
IT IS!


Looks like the end result failed on me however.
Maybe I need to un-reference anything from the SFML sources and
be referencing the build of SFML in my configurations?

Wait... Am I using the correct gcc compiler version?
The version in the code blocks executable directory would be the wrong version.
Code blocks uses 4.7.1 which is not compatible with SFGUI.
I downloaded 4.8.1 of MinGw / gcc from source forge... Check my variables...


Taking guess... CMAKE build type filled in to be == "RELEASE"
https://github.com/BIC-MNI/minc-toolkit/issues/28

error: '_hypot' was not declared in this scope

Getting an error about _hypot not declared in this scope...
Seems to be a GCC bug.
https://github.com/g-truc/glm/issues/300
QUOTE:

This is a GCC issues with no apparent workaround on GLM side. Use -D__NO_INLINE__ or edit math.h as a workaround. Closing.
Thanks,
Christophe
END_QUOTE

Found location of Math.h:
C:\MinGW\lib\gcc\mingw32\4.8.1\include\c++\tr1\Math.h

Looks like it also requires editing of file "cmath" within the same folder.


9Months ago on stack overflow:
http://stackoverflow.com/questions/29450016/o1-2-3-with-std-c1y-11-98-if-cmath-is-included-im-getting-error-hypo
QUOTE:

To avoid any further speculation, and downright bad suggestions such as using #if 0, let me give an authoritative answer, from the perspective of a MinGW project contributor.
Yes, the MinGW.org implementation of include/math.h does have a bug in its inline implementation of hypotf (float, float); the bug is triggered when compiling C++, with the affected header included (as it is when cmath is included), and any compiler option which causes __STRICT_ANSI__ to become defined is specified, (as is the case for those -std=c... options noted by the OP). The appropriate solution is not to occlude part of the math.h file, with #if 0 or otherwise, but to correct the broken inline implementation of hypotf (float, float); simply removing the spurious leading underscore from the inline reference to _hypot (float, float), where its return value is cast to the float return type should suffice.
Alternatively, substituting an equivalent -std=gnu... for -std=c... in the compiler options should circumvent the bug, and may offer a suitable workaround.
FWIW, I'm not entirely happy with MinGW.org's current implementation of hypotl (long double, long double) either; correcting both issues is on my punch list for the next release of the MinGW runtime, but ATM, I have little time to devote to preparing this.
ENDQUOTE:

Wait... Looks like I am looking at the wrong files:
Need to be looking at:
c:\mingw\include\math.h

See the spurious underscore that the MinGW contributor was speaking of? Remove it.

Here is my solution in Math.h
////////////////////////////////////////////////
/* 7.12.7.3  */
//BUGFIX: See stack overflow for hypot error.
//http://stackoverflow.com/questions/29450016/o1-2-3-with-std-c1y-11-98-if-cmath-is-included-im-getting-error-hypo
extern double __cdecl hypot (double, double); /* in libmoldname.a */
extern float __cdecl hypotf (float, float);
#ifndef __NO_INLINE__
__CRT_INLINE float __cdecl hypotf (float x, float y)
{ return (float)(hypot (x, y)); } //JMIM COMMENT: Fixing bug in MINGW.
#endif
extern long double __cdecl hypotl (long double, long double);
////////////////////////////////////////////////

Now trying to build SFGUI again... Getting these errors:
undefined reference to:
'__gxx_personality_sj0'
'_Unwind_SjLj_Register'
'_Unwind_SjLj_Resume'
'_Unwind_SjLj_Unregister'
 I guess the different libraries were compiled using different types of exception handling.
And this has lead to incompatibilities.
http://stackoverflow.com/questions/7751640/undefined-reference-to-gxx-personality-sj0

 Taking a guess:


Added -lstdc++ to compiler flags... Maybe this will help??
NOPE! Gets to 60 something percent and goes BOOM! On me with lots of errors like last time.

Above screen shot of my second attempt. Think I was just adding the flag wrong!

Weird... Seems to be starting me off from where I left-off...
Rather than starting at zero percent:



It is 9:22PM on Sunday... Might want to pack up soon...

Note: it is "mingw32-make" not "mingw-make" on the command line.
Is there are mingw64-make???
Because I am on a 64bit operating system, compiling 64 bit libraries... Wait... No... SFML is 32bit...
Is SFGUI that I am using 64bit? Could any of that be causing problems?

Still blowing up at 64%.

Trying a lot of stuff from here:
http://stackoverflow.com/questions/11783932/how-to-add-linker-or-compile-flag-in-cmake-file
But still no luck...

More research. Seems beyond me.
http://www.qtforum.org/article/29890/qt-4-6-linking-problem.html

I don't want to have "not made here syndrome". But at this point... Seems like making my own
simple UI library will be easier than this.
I just don't know enough to use Awesomium or SFGUI it seems.

Now 9:55PM.

SFML provides most of what I will need to make a GUI library.
GUI should probably be a distinct library from my game project.


Well, I want a flat file system... But... I will have to think about organization.

SFGUI vs AWESOMIUM

Replacing code::blocks minGW --version: 4.7.1
C:\DEV\PROG\codeBlocksInstalledDir\CodeBlocks\MinGW\bin
with version downloaded using source forge installer:
C:/MinGw/bin

Now when running:
gcc --version
on command line, we get: 4.8.1
Good. Now we can run SFGUI library.

Think this will be better than using awesomium:
1. Want to statically link stuff. Not fan on .exe with tons of .DLL files.
2. Using less libraries == less complexities.

Downside is that I did want to leverage HTML and Javascript to make awesome uis...
But in reality, I just want something that works and looks decent.
Awesomium requires I install SDL as well. So the complexities of getting it up and running
are a bit much for me.

And the Awesomium linux make files...... Cant get working on windows.
But I am using code::blocks and minGW, so I can't use the windows installer version.