john@BpMill:~$ cd emc2-dev
john@BpMill:~/emc2-dev$ git pull --rebase
remote: Counting objects: 23, done.
remote: Compressing objects: 100% (15/15), done.
remote: Total 15 (delta 12), reused 0 (delta 0)
Unpacking objects: 100% (15/15), done.
From ssh://git.linuxcnc.org/git/emc2
 * [new branch]      ubc3-doc-test -> origin/ubc3-doc-test
   a5bce14..0d3b24c  unified-build-candidate-3 -> origin/unified-build-candidate-3
Current branch master is up to date.
john@BpMill:~/emc2-dev$ cd src
john@BpMill:~/emc2-dev/src$ ./configure
checking libgl1-mesa-dri workaround... required - need to preload /usr/lib/libstdc++.so.6
checking build toplevel... /home/john/emc2-dev
checking installation prefix... run in place
checking for grep... /bin/grep
checking for egrep... /bin/egrep
checking for RT dir... Using /usr/realtime-2.6.32-122-rtai/bin/rtai-config as the RT signature
checking for location of kernel headers... using value from RTS: /usr/src/linux-headers-2.6.32-122-rtai
checking for cc version... found gcc in rtai-config
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking how to run the C preprocessor... gcc -E
checking for usability of rdtscll from asm/msr.h... no
checking for usability of linux/hidraw.h... yes
checking for libmodbus3... no
configure: error: libmodbus3 not found!
install with "sudo apt-get install libmodbus-dev" or disable with
"configure --without-libmodbus"
john@BpMill:~/emc2-dev/src$ sudo apt-get install libmodbus-dev
Reading package lists... Done
Segmentation faulty tree... 56%
john@BpMill:~/emc2-dev/src$