So I tried to compile on linux for the first time. I got sources from SVN trunk and followed the instructions. I started compiling GG and after several successfully compiled files I got this.
g++ -o src/Texture.os -c -pthread -Wall -Wno-parentheses -O2 -fPIC -I/usr/include/freetype2 -I. -Ilibltdl src/Texture.cpp
src/Texture.cpp: In member function 'void GG::Texture::Load(const std::string&, bool)':
src/Texture.cpp:275: error: 'gray8_pixel_t' is not a member of 'gil'
src/Texture.cpp:275: error: template argument 1 is invalid
src/Texture.cpp:276: error: 'gray_alpha8_pixel_t' is not a member of 'gil'
src/Texture.cpp:276: error: template argument 1 is invalid
src/Texture.cpp:277: error: 'rgb8_pixel_t' is not a member of 'gil'
Why so? Did I forget some dependencies?