Hermann's picture viewer
This simple picture viewer was written in the spirit of IrfanView, gpicview and Windows 7's picture viewer.
All of them can rotate JPEG files losslessly, but only Windows 7's picture viewer offers a one-click solution.
git submodule update --init
(cd submodules/libjpeg/ && patch < ../libjpeg-reset-orientation-tag.patch) # optional
mkdir build
cd build
cmake ..
cmake --build .