Cargo Features

fltk2-sys has no features set by default.

[dependencies]
fltk2-sys = { version = "0.1.1", features = ["system-fltk", "system-zlib", "enable-glwindow", "no-gdiplus", "wayland-only", "cairoext", "fltk-config", "gtk-decor"] }
fltk-shared use-ninja system-fltk
system-libpng system-libjpeg system-zlib
legacy-opengl fltk-bundled enable-glwindow
use-images no-pango-cairo no-gdiplus
single-threaded no-wayland wayland-only
static-msvcrt cairoext
fltk-config = cc
pkg-config gtk-decor

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

cc build fltk-config?