Fails to build on ghostBSD

SDL Development
1

Ahoy,

I’m trying to build the git repo version of SDL on ghostBSD. I’ve tried using GCC 11, but I get this error:

[ 87%] Building C object CMakeFiles/SDL2-static.dir/src/core/linux/SDL_udev.c.o
/usr/home/mm/Desktop/SDL_port/lib/SDL/src/core/linux/SDL_udev.c:32:10: fatal error: linux/input.h: No such file or directory
   32 | #include <linux/input.h>
      |          ^~~~~~~~~~~~~~~

Any ideas what is going on?

2

Post uname -a from the command line.

3 
FreeBSD mm-ghostbsd-pc 13.0-STABLE FreeBSD 13.0-STABLE GENERIC
4

linux/input.h: No such file or directory, it tries to find linux/input.h in the include directories and couldn’t find it.

This is because SDL/src/core/linux/SDL_udev.c is being told to be compiled (unsuccessfully) by cmake.

Since you’re using ghostbsd it shouldn’t try to compile a linux specific file (it should compile the freebsd file since ghostbsd is based of freebsd), so we’ll have to figure out why it cmake included it.

it’s included because HAVE_LIBUDEV_H is set to true. (A quick fix might be to comment this part out).

HAVE_LIBUDEV_H is set to true because it checked for libudev.h in the
include paths and found it.

Is there libudev.h in your include paths?
libudev-devd seems to install libudev.h into the include path but doesn’t directly provide linux/input.h (it’s provided by its build dependency evdev-proto).

Though I don’t think SDL needs udev in freebsd / ghostbsd.

You could try:

  1. Commenting out this part in CMakeLists
  2. Compile using make not cmake. Since it seems that cmake is still experimental
  3. Installing evdev-proto or removing libudev-devd (I don’t think this is the best choice but you might want to try this as a last resort).

Edit: it seems like sdl2 requires evdev-proto so Installing it is probably what you want to do.

5

Thanks very much for the detailed reply!

Is there libudev.h in your include paths?

Yeah, libudev.h shows up in my /usr/include folder

Edit: it seems like sdl2 requires evdev-proto so Installing it is probably what you want to do.

Awesome, that solved it! Many thanks for the help!