SDL_gfx Library Compilation libtool warning message and cannot build shared libraries

[Canberk Sönmez]

I originally asked this question on stackoverflow. Some of them recommended me that I ask it on this address, since it looks very libtool specific.

I actually solved my problem by downloading pre-built binaries but I ask to you since maybe there is a bug or something.

My original question

Here is my question I simply made copy and paste:

I am using MinGW 4.8.1. I have downloaded SDL 2.0.3 development files archive for Windows. It contains 64-bit and 32-bit development files for Mingw in i686-w64-mingw32 and x86_64-w64-mingw32 and MSVC development files in root directory. I have extracted the archive to C:\SourceCode\Libraries\SDL2-2.0.3 directory. When I want to use SDL, I simply add C:\SourceCode\Libraries\SDL2-2.0.3\i686-w64-mingw32\include to Include Directories and C:\SourceCode\Libraries\SDL2-2.0.3\i686-w64-mingw32\libto Library Paths. Then I link the mingw32, SDL2main and SDL2 libraries. This way, I can successfully compile SDL programs. But there is a problem when compiling a library using SDL. I tried to compile SDL2_gfx library. It does not have windows specific build option for MinGW. So you have use MSYS to compile it. I have used following configuration flags for compiling with MSYS:

../configure --prefix="/c/SourceCode/Source/SDL2_gfx-1.0.1/prefix" --with-sdl-prefix="/c/SourceCode/Libraries/SDL2-2.0.3/i686-w64-mingw32/"

I used --prefix option for isolating installed files from my MSYS directory. Since MSYS cannot know where the SDL is I used --with-sdl-prefix.

The configuration had done successfully. Then, I execute make command. After a list of compilation processes, the linker process has warned me with:

libtool: link: warning: library `/c/SourceCode/Libraries/SDL2-2.0.3/i686-w64-mingw32/lib/libSDL2.la' was moved.

*** Warning: linker path does not have real file for library -lmingw32.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libmingw32 and none of the candidates passed a file format test
*** using a file magic. Last file checked: c:/mingw/lib/libmingw32.a

*** Warning: linker path does not have real file for library -lSDL2main.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libSDL2main and none of the candidates passed a file format test
*** using a file magic. Last file checked: /c/SourceCode/Libraries/SDL2-2.0.3/i686-w64-mingw32/lib/libSDL2main.a

*** Warning: linker path does not have real file for library -ldxguid.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libdxguid and none of the candidates passed a file format test
*** using a file magic. Last file checked: c:/mingw/lib/libdxguid.a

*** Warning: linker path does not have real file for library -ldxerr8.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libdxerr8 and none of the candidates passed a file format test
*** using a file magic. Last file checked: c:/mingw/lib/libdxerr8.a

*** Warning: linker path does not have real file for library -luuid.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libuuid and none of the candidates passed a file format test
*** using a file magic. Last file checked: c:/mingw/lib/libuuid.a
*** The inter-library dependencies that have been dropped here will be
*** automatically added whenever a program is linked with this library
*** or is declared to -dlopen it.

*** Since this library must not contain undefined symbols,
*** because either the platform does not support them or
*** it was explicitly requested with -no-undefined,
*** libtool will only create a static version of it.

Then I only had a static library. At first I ignored these warnings and kept using static library in my project.

When I use the static version of that library I encountered a lot of unresolved functions errors in ldoutput. They are kind of "SDL_XXX" not found. I think these errors are related to using shared version of SDL and static version of SDL2_gfx.

So I need a shared library. How can I solve those warning messages in make output?