h2o still is pretty modular and it's easy to for example rip out their http/1.1 parser and use it. Other projects tend to accumulate a large utils.h or similar

h2o still is pretty modular and it's easy to for example rip out their http/1.1 parser and use it. Other projects tend to accumulate a large utils.h or similar over time wrapping every other libc function, have typedefs, macros left and right etc. so you'd either pull all this in too or spend a few days undoing everything.