libi2c-dev library conflict during installation.

[pcouncil86450]

I found that if you want to install the daqhats library you have to uninstall libi2c-dev, install MCC daqhats library, then reinstall libi2c-dev. If you try to install the MCC daqhats library with libi2c-dev installed there will be errors that prevent communication with the daqhat.

My other i2c hardware works fine after this process so far. I also ran the other i2c hardware in addition to running the daqhat at the same time.

Since others may run into this issue in the future I wanted to raise the issue so others can find the solution.

[nwright-mcc]

What sort of issues do you have if you do not uninstall libi2c-dev first?

Does install.sh ask you about enabling the I2C interface? If so, are you answering yes or no?

Thanks!

[pcouncil86450]

install.sh does not ask about enabling the I2C interface since I already have enabled it prior to running install.sh for my other I2C devices.

In the log the install.sh has issues because some things have been redefined by libi2c-dev. I think this is what causes it to fail with the other steps of the installation.

Here is the log after running install.sh:

Building and installing library

make: Entering directory '/home/pi/daqhats/lib' gcc -I../include -I/opt/vc/include -fPIC -Wall -Wextra -g -O2 -MMD -c util.c -o build/util.o gcc -I../include -I/opt/vc/include -fPIC -Wall -Wextra -g -O2 -MMD -c mcc118.c -o build/mcc118.o gcc -I../include -I/opt/vc/include -fPIC -Wall -Wextra -g -O2 -MMD -c mcc152.c -o build/mcc152.o gcc -I../include -I/opt/vc/include -fPIC -Wall -Wextra -g -O2 -MMD -c mcc152_dac.c -o build/mcc152_dac.o gcc -I../include -I/opt/vc/include -fPIC -Wall -Wextra -g -O2 -MMD -c mcc152_dio.c -o build/mcc152_dio.o In file included from mcc152_dio.c:12:0: /usr/include/linux/i2c-dev.h:37:8: error: redefinition of ‘struct i2c_msg’ struct i2c_msg { ^~~ In file included from mcc152_dio.c:11:0: /usr/include/linux/i2c.h:68:8: note: originally defined here struct i2c_msg { ^~~ In file included from mcc152_dio.c:12:0: /usr/include/linux/i2c-dev.h:89:7: error: redefinition of ‘union i2c_smbus_data’ union i2c_smbus_data { ^~~~~~ In file included from mcc152_dio.c:11:0: /usr/include/linux/i2c.h:131:7: note: originally defined here union i2c_smbus_data { ^~~~~~ makefile:30: recipe for target 'build/mcc152_dio.o' failed make: [build/mcc152_dio.o] Error 1 make: Leaving directory '/home/pi/daqhats/lib' make: Entering directory '/home/pi/daqhats/lib' make[1]: Entering directory '/home/pi/daqhats/include' make[1]: Leaving directory '/home/pi/daqhats/include' install: cannot stat './build/libdaqhats.so.1.1.0.2': No such file or directory makefile:35: recipe for target 'install' failed make: [install] Error 1 make: Leaving directory '/home/pi/daqhats/lib' make: Entering directory '/home/pi/daqhats/lib' make: Leaving directory '/home/pi/daqhats/lib'

Building and installing tools

make: Entering directory '/home/pi/daqhats/tools' gcc -I/usr/local/include -I../lib -g -c -o mcc118_firmware_update.o mcc118_firmware_update.c gcc -o mcc118_firmware_update mcc118_firmware_update.o -ldaqhats /usr/bin/ld: cannot find -ldaqhats collect2: error: ld returned 1 exit status makefile:15: recipe for target 'mcc118_firmware_update' failed make: [mcc118_firmware_update] Error 1 make: Leaving directory '/home/pi/daqhats/tools' make: Entering directory '/home/pi/daqhats/tools' install: cannot stat 'mcc118_firmware_update': No such file or directory makefile:25: recipe for target 'install' failed make: [install] Error 1 make: Leaving directory '/home/pi/daqhats/tools' make: Entering directory '/home/pi/daqhats/tools' make: Leaving directory '/home/pi/daqhats/tools'

Building examples

make: Entering directory '/home/pi/daqhats/examples/c' make -C mcc152/. all make[1]: Entering directory '/home/pi/daqhats/examples/c/mcc152' make -C digital_input_read_port/. all make[2]: Entering directory '/home/pi/daqhats/examples/c/mcc152/digital_input_read_port' gcc -c -o digital_input_read_port.o digital_input_read_port.c -Wall -I/usr/local/include -g gcc -o digital_input_read_port digital_input_read_port.o -Wall -I/usr/local/include -g -ldaqhats /usr/bin/ld: cannot find -ldaqhats collect2: error: ld returned 1 exit status makefile:14: recipe for target 'digital_input_read_port' failed make[2]: [digital_input_read_port] Error 1 make[2]: Leaving directory '/home/pi/daqhats/examples/c/mcc152/digital_input_read_port' makefile:7: recipe for target 'digital_input_read_port/.' failed make[1]: [digital_input_read_port/.] Error 2 make[1]: Leaving directory '/home/pi/daqhats/examples/c/mcc152' makefile:7: recipe for target 'mcc152/.' failed make: *** [mcc152/.] Error 2 make: Leaving directory '/home/pi/daqhats/examples/c'

Reading DAQ HAT EEPROMs

./install.sh: line 36: daqhats_read_eeproms: command not found

Installing library for Python 3 Processing /home/pi/daqhats Installing collected packages: daqhats Running setup.py install for daqhats ... done Successfully installed daqhats-1.1.0.2

Do you want to install support for Python 2? [y/n] y Installing library for Python 2 Processing /home/pi/daqhats Requirement already up-to-date: enum34 in /usr/lib/python2.7/dist-packages (from daqhats==1.1.0.2) Installing collected packages: daqhats Running setup.py install for daqhats ... done Successfully installed daqhats-1.1.0.2

Install complete

[nwright-mcc]

It is a conflict between the kernel headers and libi2c-dev. I can avoid it with a change to the #includes in mcc152_dio.c, and will have the fix in the next release.