[mainly solved] can't install the lib on my Raspberry Pi (OS Raspbian Stretch)

[dsyleixa]

I can't install the lib on my Raspberry Pi (OS Raspbian Stretch), downloading and then typing "make" or even "sudo make" does not work at all, e.g.,

pi@PiStr:~/ArduiPi_OLED $ sudo make
g++ -Wall -fPIC -fno-rtti -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -c ArduiPi_OLED.cpp
ArduiPi_OLED.cpp: In member function ‘void ArduiPi_OLED::putSeedChar(char)’:
ArduiPi_OLED.cpp:635:41: warning: array subscript has type ‘char’ [-Wchar-subscripts]
             char bit1=( seedfont[C-32][i]   >> j) & 0x01;
                                         ^
In file included from ArduiPi_OLED.cpp:36:0:
./ArduiPi_OLED_lib.h: At global scope:
./ArduiPi_OLED_lib.h:58:21: warning: ‘oled_type_str’ defined but not used [-Wunused-variable]
 static const char * oled_type_str[] = {
                     ^~~~~~~~~~~~~
g++ -Wall -fPIC -fno-rtti -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -c Adafruit_GFX.cpp
In file included from Adafruit_GFX.cpp:26:0:
./ArduiPi_OLED_lib.h:58:21: warning: ‘oled_type_str’ defined but not used [-Wunused-variable]
 static const char * oled_type_str[] = {
                     ^~~~~~~~~~~~~
gcc -Wall -fPIC -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -c bcm2835.c
gcc -Wall -fPIC -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -c Wrapper.cpp
Wrapper.cpp: In function ‘int16_t Wrapper_DisplayWidth()’:
Wrapper.cpp:233:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
Wrapper.cpp: In function ‘int16_t Wrapper_DisplayHeight()’:
Wrapper.cpp:238:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
In file included from Wrapper.cpp:39:0:
./ArduiPi_OLED_lib.h: At global scope:
./ArduiPi_OLED_lib.h:58:21: warning: ‘oled_type_str’ defined but not used [-Wunused-variable]
 static const char * oled_type_str[] = {
                     ^~~~~~~~~~~~~
g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s   -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o -li2c
/usr/bin/ld: cannot find -li2c
collect2: error: ld returned 1 exit status
Makefile:54: die Regel für Ziel „ArduiPi_OLED“ scheiterte
make: *** [ArduiPi_OLED] Fehler 1

how to fix that?

[devel0]

apt install libi2c-dev

this fixed that error for me on raspian buster, can you confirm that solve for you too ?

[dsyleixa]

libi2c-dev is already installed:

sudo apt-get install libi2c-dev :
is already the latest version (3.1.2-3).

Nonetheless, no installation via make possible.
(Just to mention: OS Buster is off-topic here. I am using Stretch as stated.)

[devel0]

hmm, that's bit strange, if I remove the lib the make fail as expected

root@raspberrypi:/usr/src/ArduiPi_OLED# apt remove libi2c-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  libi2c-dev
0 upgraded, 0 newly installed, 1 to remove and 100 not upgraded.
After this operation, 31.7 kB disk space will be freed.
Do you want to continue? [Y/n] 
(Reading database ... 41905 files and directories currently installed.)
Removing libi2c-dev (4.1-1) ...
root@raspberrypi:/usr/src/ArduiPi_OLED# make
g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s   -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o -li2c
/usr/bin/ld: cannot find -li2c
collect2: error: ld returned 1 exit status
make: *** [Makefile:54: ArduiPi_OLED] Error 1

while reinstalling the lib it worked

root@raspberrypi:/usr/src/ArduiPi_OLED# apt install libi2c-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  libi2c-dev
0 upgraded, 1 newly installed, 0 to remove and 100 not upgraded.
Need to get 11.9 kB of archives.
After this operation, 31.7 kB of additional disk space will be used.
Get:1 http://raspbian.mirror.garr.it/mirrors/raspbian/raspbian buster/main armhf libi2c-dev armhf 4.1-1 [11.9 kB]
Fetched 11.9 kB in 1s (10.8 kB/s)
Selecting previously unselected package libi2c-dev.
(Reading database ... 41896 files and directories currently installed.)
Preparing to unpack .../libi2c-dev_4.1-1_armhf.deb ...
Unpacking libi2c-dev (4.1-1) ...
Setting up libi2c-dev (4.1-1) ...
root@raspberrypi:/usr/src/ArduiPi_OLED# make
g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s   -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o -li2c
[Install Library]
[Install Headers]

This the contents of libi2c-dev package

root@raspberrypi:/usr/src/ArduiPi_OLED# dpkg -L libi2c-dev
/.
/usr
/usr/include
/usr/include/i2c
/usr/include/i2c/smbus.h
/usr/lib
/usr/lib/arm-linux-gnueabihf
/usr/lib/arm-linux-gnueabihf/libi2c.a
/usr/share
/usr/share/doc
/usr/share/doc/libi2c-dev
/usr/share/doc/libi2c-dev/changelog.Debian.gz
/usr/share/doc/libi2c-dev/changelog.gz
/usr/share/doc/libi2c-dev/copyright
/usr/share/doc/libi2c-dev/dev-interface.gz
/usr/lib/arm-linux-gnueabihf/libi2c.so

if I move libi2c.a to temp folder to test build fails

root@raspberrypi:/usr/src/ArduiPi_OLED# mkdir -p ~/tmp
root@raspberrypi:/usr/src/ArduiPi_OLED# mv /usr/lib/arm-linux-gnueabihf/libi2c.a ~/tmp
root@raspberrypi:/usr/src/ArduiPi_OLED# make
g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s   -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o -li2c

/usr/bin/ld: cannot find -li2c
collect2: error: ld returned 1 exit status
make: *** [Makefile:54: ArduiPi_OLED] Error 1

I can build wrapping with flag to specify where the lib is, in the example case /root/tmp because ~/tmp expands to user home and I was from root

root@raspberrypi:/usr/src/ArduiPi_OLED# g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s   -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o -L/root/tmp -li2c
root@raspberrypi:/usr/src/ArduiPi_OLED# 

I suggest you to try execute sudo -i to enter from pi to root user and try a make clean then make again; if this fails inspect dpkg -L libi2c-dev to see where libi2c.a located then make a copy of that library in a known folder and try to override linker flags as specified, just copy paste the failing g++ -shared ... line and add -L/root/tmp or other folder where lib copied.

[dsyleixa]

dpkg -L libi2c-dev only finds
usr/include/linux/i2c-dev.h
package redirects others to usr/include/linux/i2c-dev.h.kernel
usr/share/doc/libi2c-dev
(plus some paths more)

but it lists no libi2c.a or libi2c.so and also no smbus.h
how to reinstall them?

[devel0]

you could try to search for libi2c.a using apt-file utility as follows

apt-get install apt-file

after installed refresh the search archive with apt-file update then search where libi2c.a located with

apt-file search libi2c.a

this way you will find which package should contains the library, may your distro moved the library binary to other package.

in my case the cmd reports searched file belongs to libi2c-dev pkg while I expect different result for your distro, if so go to install for addictional reported package:

root@main:~# apt-file search libi2c.a
libi2c-dev: /usr/lib/x86_64-linux-gnu/libi2c.a

[dsyleixa]

$ sudo apt-get install apt-file
$ sudo apt-file update
have already been executed.

then, as stated,
apt-get install libi2c-dev
says:
is already the latest version (3.1.2-3).

apt-file search libi2c.a
outputs nothing.

[devel0]

In fact I just seen from https://packages.debian.org/index that your distro missing libi2c.a at all

Could you try to run the latest line from your source dir ( I removed -li2c )

g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s   -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o

[dsyleixa]

tbh, I don't understand what you mean ..?

[devel0]

from your source of ArduiPi_OLED if you run make the result should

g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s   -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o -li2c
/usr/bin/ld: cannot find -li2c
collect2: error: ld returned 1 exit status
Makefile:54: die Regel für Ziel „ArduiPi_OLED“ scheiterte
make: *** [ArduiPi_OLED] Fehler 1

so try to copy paste the g++ ... line omitting the -li2c

[dsyleixa]

so first,
cd ArduiPi_OLED

and then
g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o -li2c

?

[devel0]

as expected, but insert the command by hand ( better with mouse select then middle btn to paste )

g++ -shared -Wl,-soname,libArduiPi_OLED.so.1 -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -o libArduiPi_OLED.so.1.0 ArduiPi_OLED.o Adafruit_GFX.o bcm2835.o Wrapper.o

alternatively remove it from Makefile then issue a make

[dsyleixa]

ok, so without the -li2c at the end.
I'll do ASAP, a SD backup is currently running (for safety reasons, if anything from now messes up my sytem ;) )

[devel0]

:) but it worked ?
Unfortunately I running another distro and I cannot test the behavior, but if you confirm that compile work I would schedule to modify Makefile so that if stretch distro detected then it will not include -li2c flag.

[dsyleixa]

just of interest, meanwhile:
why do I have a libi2c.h but no libi2c.a/so ?