OpenBSD: "error: unknown type name 'u_int'" when compiling

[vl-ms]

Everything up until the make command worked fine. I installed required dependencies, and the configuation did not produce any errors.

$ make
Making all in src
  CC       rastertocapt.o
In file included from rastertocapt.c:30:
In file included from /usr/local/include/cups/raster.h:20:
In file included from /usr/local/include/cups/cups.h:28:
In file included from /usr/local/include/cups/ipp.h:18:
In file included from /usr/local/include/cups/http.h:39:
/usr/include/netinet/ip.h:49:2: error: unknown type name 'u_int'
        u_int     ip_hl:4,              /* header length */
        ^
/usr/include/netinet/ip.h:174:2: error: unknown type name 'u_int'
        u_int    ipt_flg:4,             /* flags, see below */
        ^
2 errors generated.
*** Error 1 in src (Makefile:401 'rastertocapt.o': @echo "  CC      " rastertocapt.o;depbase=`echo rastertocapt.o | sed 's|[^/]*$|.deps/&|;s...)
*** Error 1 in /home/unix/soft/captdriver (Makefile:435 'all-recursive': @fail=;  if (target_option=k; case ${target_option-} in  ?) ;;  *) ...)

@vl-ms Have you tried to use gmake? OpenBSD doesn't use GNU make in their base operating system.

[vl-ms]

Yeah, forgot to mention. Gives pretty much the same error

$ gmake
Making all in src
gmake[1]: Entering directory '/home/unix/soft/captdriver/src'
  CC       rastertocapt.o
In file included from rastertocapt.c:30:
In file included from /usr/local/include/cups/raster.h:20:
In file included from /usr/local/include/cups/cups.h:28:
In file included from /usr/local/include/cups/ipp.h:18:
In file included from /usr/local/include/cups/http.h:39:
/usr/include/netinet/ip.h:49:2: error: unknown type name 'u_int'
        u_int     ip_hl:4,              /* header length */
        ^
/usr/include/netinet/ip.h:174:2: error: unknown type name 'u_int'
        u_int    ipt_flg:4,             /* flags, see below */
        ^
2 errors generated.
gmake[1]: *** [Makefile:399: rastertocapt.o] Error 1
gmake[1]: Leaving directory '/home/unix/soft/captdriver/src'
gmake: *** [Makefile:410: all-recursive] Error 1

[mounaiban]

I'm trying to get up to speed on OpenBSD as I am writing this, but for now there's this trick from an early-2013 LinuxQuestions thread: what include am i missing for types like u_int8_t?

Maybe try adding this one line to std.h, on line 27?

#include <sys/types.h>

I'm under the impression that on Linux the typical C/C++ toolchain makes subtle but important assumptions that OpenBSD doesn't.

I also added that line #define _POSIX_C_SOURCE 199309L, in order to use POSIX signals, maybe try removing that when you compile and see if it makes a difference for you if including types.h fails.

[vl-ms]

Adding #include <sys/types.h> did not make a difference.
After removing #define _POSIX_C_SOURCE 199309L the error changed:

make       
Making all in src
  CC       rastertocapt.o
  CC       capt-command.o
  CC       capt-status.o
  CC       generic-ops.o
  CC       printer.o
  CC       paper.o
  CC       hiscoa-common.o
  CC       hiscoa-compress.o
  CC       prn_lbp2900.o
  CCLD     rastertocapt
ld: error: unable to find library -lcups
cc: error: linker command failed with exit code 1 (use -v to see invocation)
*** Error 1 in src (Makefile:374 'rastertocapt': @echo "  CCLD    " rastertocapt;cc -std=c99 -Wall -Wextra -pedantic -I/usr/local/include -g...)
*** Error 1 in /home/unix/soft/captdriver (Makefile:435 'all-recursive': @fail=;  if (target_option=k; case ${target_option-} in  ?) ;;  *) ...)

[mounaiban]

@vl-ms are you compiling CUPS from source along with captdriver? Are there OpenBSD equivalents to the -dev packages on Linux?

(Sorry for the late reply, I'm still trying to figure out OpenBSD)

@vl-ms Can you provide guide steps how install dependencies and build it in OpenBSD? I think it may help @mounaiban check why it isn't compile in OpenBSD. I would love to see captdriver work in OpenBSD too since I have lbp2900 printer at home.

[vl-ms]

@mounaiban no, we don't have -dev packages on OpenBSD. Everything is bundled in one package, sometimes the -debug packages are also made available. On installing dependencies: it's very easy, for searching the repositories we use pkg_info -Q and for installing doas pkg_add, if you're on a snapshot you should also add -D snap. In my case, I did pkg_add -D snap cups metaauto autoconf automake git. When in doubt, check the man pages or the OpenBSD FAQ, it's very good. Ah, don't forget to set up your /etc/doas.conf, I prefer to do permit persist 'your user' as root

[vl-ms]

on building, I just followed the build steps from here and added
export AUTOMAKE_VERSION=1.16 AUTOCONF_VERSION=2.71 because aclocal complained about that. Of course, if you choose to install a different version of automake & autoconf you need to edit the variables accordingly

[vl-ms]

If a problem is with getting OpenBSD to install on your devices, I recommend virt-manager or virtualbox. Both allow USB passthrough, and both should work ok with OpenBSD as a guest OS.

[mounaiban]

@vl-ms OpenBSD was actually pretty easy to get up and running in QEMU and VirtualBox due to excellent VMM support, my sticking point is with coming to terms with differences between BSD and Linux when it comes to compiling code.

I'll get back to this when I get the time. BSD support is part of our master plan!

Hopefully no editing of makefile or automake files would be necessary. The automake documentation really makes it look like automake is too complex to document in an understandable way...

[vl-ms]

Yeah, automake certainly seems to be overcomplicated. I'm in no hurry to make this printer work tomorrow or anything, it would just be nice to be able to print something once in a while. Maybe I will contribute myself one day when I come to understand C. If you are interested in other makefile generators, I heard mostly good things about Premake (Lua + C), and heard both good and bad things about Cmake (C++). Other than that, Meson requires Python, and everything else is much more obscure. E.g. Zig is still unstable, Gradle is mostly for Android, mk requires plan9port or Go... I heard that it is a possible to write Makefiles that work with both GNU and BSD make, but I don't know of any specific guidelines which show how to do that.

[saper]

Maybe it helps:

I was able to successfully build and run this on FreeBSD by applying #25 and using env LDFLAGS=-L/usr/local/lib CPPFLAGS=-I/usr/local/include ./configure and then gmake (GNU make). BSD make also works but re-runs all autoconf stuff and configure.

By the way, as of commit 6271924 my LBP3010 works! (it didn't work with 195ea02 due to some unexpected USB responses). Thank you very very much!