FreeBSD compatibility

[interkosmos]

Trying to build qengine on FreeBSD:

$ mkdir build
$ cd build/
$ cmake -DBUILD_SDL=OFF -DBUILD_DOCS=OFF ..

This fails, as the following include has to be added to src/platform/unix/memory.c first:

@@ -36,6 +36,7 @@
 
 #if defined(__FreeBSD__) || defined(__OpenBSD__)
 #include <machine/param.h>
+#include <sys/types.h>
 #define MAP_ANONYMOUS MAP_ANON
 #endif

Then, linking fails:

[ 31%] Building C object CMakeFiles/client.dir/src/game/player/weapon.c.o
[ 32%] Linking C executable client
ld: error: undefined symbol: input_update
>>> referenced by system.c
>>> CMakeFiles/client.dir/src/platform/unix/system.c.o:(Sys_SendKeyEvents)
[…]

Perhaps, input.h is not found for whatever reason?

[kniffy]

for reasons I don't understand I can successfully build qengine on my freebsd 13.2 workstation, after applying the memory.c patch. I packed a tarball of the build dir here https://tildas.org/files/misc/qengine-fbsd-20230725.tzst

it does not build on a ghostbsd 23.06.01 system:

[ 29%] Building C object vendor/SDL2-2.0.22/CMakeFiles/SDL2.dir/src/video/x11/SDL_x11xinput2.c.o
[ 29%] Building C object vendor/SDL2-2.0.22/CMakeFiles/SDL2.dir/src/video/x11/edid-parse.c.o
[ 29%] Building C object vendor/SDL2-2.0.22/CMakeFiles/SDL2.dir/src/core/unix/SDL_poll.c.o
[ 29%] Building C object vendor/SDL2-2.0.22/CMakeFiles/SDL2.dir/src/core/linux/SDL_udev.c.o
/home/voyevoda/WORK/GIT/qengine/vendor/SDL2-2.0.22/src/core/linux/SDL_udev.c:32:10: fatal error: 'linux/input.h' file not found
#include <linux/input.h>
         ^~~~~~~~~~~~~~~
1 error generated.
*** Error code 1