libXtst fails to compile with x11-libs/libXext-1.1.2 installed, because some header files (/usr/include/X11/extensions/Xext.h, /usr/include/X11/extensions/extutil.h ...) are missing. I masked =x11-libs/libXext-1.1.2 so x11-libs/libXext-1.1.1 got installed, after that libXtst works fine. Reproducible: Always Steps to Reproduce:
x11-libs/libXtst-1.1.0 (current stable) builds fine with x11-libs/libXext-1.1.2 (also current stable) closing as invalid