This is a post to remind myself how to build aircrack-ng on OpenBSD, since I always seem to forget.

The standard OpenBSD make tool doesn’t support $(shell ...) commands, thus the REVISION variable gets set to an empty string instead of 0. As a result, all the code that references the _REVISION macro doesn’t compile right. The failure looks like this:

# make
gcc -O2 -pipe  -D_FILE_OFFSET_BITS=64 -D_REVISION= src/aircrack-ng.c src/crypto.c src/sha1-mmx.S src/common.c src/aircrack-ptw-lib.c -o aircrack-ng -lpthread
src/aircrack-ng.c: In function `main':
src/aircrack-ng.c:2996: error: syntax error before ')' token
*** Error code 1

Stop in /home/anelson/aircrack-ng-0.9.1 (line 27 of Makefile).

The solution is to use GNU make, which under OpenBSD must be installed using the gmake port, and run using gmake instead of make.

When using gmake install to install, I always have to comment out the Makefile line that installs the stuff into SBINDIR, since there are no sbin files; otherwise the install fails thusly:

install -m 755  /sbin
usage: install [-bCcdpSs] [-B suffix] [-f flags] [-g group] [-m mode] [-o owner]
               source [...] target [...]
gmake: *** [install] Error 64