Before compiling any program that uses Xlib, you have to install the headers and libraries.
List Xlib related packages.
dnf search libX
Install the binaries.
dnf install libXp libXpm libXt libXtst libXv libXvMC libX11 libX11-common \
libXNVCtrl libXScrnSaver libXau libXaw libXcomposite libXcursor \
libXdamage libXdmcp libXevie libXext libXfixes libXfont libXft \
libXi libXinerama libXmu libXrandr libXrender libXres \
libXxf86dga libXxf86misc libXxf86vm libx86 libx86emu libxc \
libxcb libxcb-doc xcb-util xcb-util-image xcb-util-keysyms \
xcb-util-wm libxdo libxkbfile libxklavier libxkbcommon
Install the development packages.
dnf install libXp-devel libXpm-devel libXt-devel libXtst-devel libXv-devel \
libXvMC-devel libX11-devel libXNVCtrl-devel libXScrnSaver-devel \
libXau-devel libXaw-devel libXcomposite-devel libXcursor-devel \
libXdamage-devel libXdmcp-devel libXevie-devel libXext-devel \
libXfixes-devel libXfont-devel libXft-devel libXi-devel \
libXinerama-devel libXmu-devel libXrandr-devel libXrender-devel \
libXres-devel libXxf86dga-devel libXxf86misc-devel \
libXxf86vm-devel libx86-devel libx86emu-devel libxc-devel \
libxcb-devel libxdo-devel libxkbfile-devel libxklavier-devel \
libxkbcommon-devel