Adding FreeBSD support

[mcuee]

I am able to get hidapitester working under FreeBSD but I am not good at modifying the Makefile.

uname --> FreeBSD
CC --> cc (FreeBSD clang)
LIBS --> -lusb -lpthread (FreeBSD libusb-1.0 needs to link with -lusb)

Packages to install in order to build (libusb-1.0 is part of FreeBSD base OS, so no need to install)

1. cmake
2. MAKE --> gmake
3. pkg-config --> part of pkgconf package

I can use the following command line to build under FreeBSD.

cc -o hidapitester -I ../hidapi/hidapi ../hidapi/libusb/hid.c hidapitester.c -lusb -lpthread

[mcuee]

The binary is working.
Ref: libusb/hidapi#407 (comment)

mcuee@freebsdx64vm:~/build/hidapitester $ sudo ./hidapitester --vidpid 0925:7001  -l 3 --open --send-output 2,2,3 --read-input
Opening device, vid/pid: 0x0925/0x7001
Writing output report of 3-bytes...wrote 3 bytes:
 02 02 03
Reading 3-byte input report 0, 250 msec timeout...read 3 bytes:
 01 02 03
Closing device
mcuee@freebsdx64vm:~/build/hidapitester $ sudo ./hidapitester --vidpid 0925:7001  -l 4 --open --send-feature 3,4,5,6 --read-feature 4
Opening device, vid/pid: 0x0925/0x7001
Writing 4-byte feature report...wrote 4 bytes:
 03 04 05 06
Reading 4-byte feature report, report_id 4...read 3 bytes:
 04 04 05 00
Closing device

[Tod Kurt]

I think I added freebsd support. Let me know if there are any issues. Thank you for being patient. I've not been at my normal bench to test HID stuff.

[mcuee]

Yes the latets git works.

mcuee@freebsdx64vm:/usr/home/mcuee/build/hidapitester $ gmake
cc -I/usr/local/include -I ../hidapi/hidapi -c ../hidapi/libusb/hid.c -o ../hidapi/libusb/hid.o
cc -I/usr/local/include -I ../hidapi/hidapi -c hidapitester.c -o hidapitester.o
cc -I/usr/local/include -I ../hidapi/hidapi ../hidapi/libusb/hid.o hidapitester.o -o hidapitester -L/usr/local/lib -lusb -liconv -pthread