Re: OpenCV with Eclipse on Fedora 30

2020-02-10 Thread Howard Howell 
On Thu, 2020-02-06 at 18:36 -0400, George N. White III wrote:
> On Thu, 6 Feb 2020 at 15:04, Danishka Navin 
> wrote:
> > Hi,
> > 
> > I am new to eclipse and opencv and I was trying to build a sample
> > c++ code using Eclipse.
> > 
> > I have installed following packages. 
> > rpm -qa | grep opencv
> > opencv-devel-3.4.4-10.fc30.x86_64
> > opencv-3.4.4-10.fc30.x86_64
> > opencv-core-3.4.4-10.fc30.x86_64
> > opencv-contrib-3.4.4-10.fc30.x86_64
> > 
> > 
> > 00:29:09  Incremental Build of configuration Debug for project
> > sample 
> > make all 
> > Building target: sample
> > Invoking: GCC C++ Linker
> > g++ -L/usr/lib64/ -L/usr/lib/ -o "sample"  ./main.o  
> > -llibopencv_core.so.3.4 -llibopencv_core.so.3.4.4
> > -llibopencv_highgui.so.34 -llibopencv_highgui.so.3.4.4
> > 
> 
> libopencv_core.so.3.4 should be a symbolic link to
> libopencv_core.so.3.4.4, same for libopencv_highgui.so.3.4. Try:
> g++ -o "sample"  ./main.o -lopencv_core -lopencv_highgui 
> Stackoverflow has this among other solutions.
>  
> > /usr/bin/ld: cannot find -llibopencv_core.so.3.4
> > /usr/bin/ld: cannot find -llibopencv_core.so.3.4.4
> > /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4
> > /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4.4
> > collect2: error: ld returned 1 exit status
> > make: *** [makefile:46: sample] Error 1
> > "make all" terminated with exit code 2. Build might be incomplete.
> > 
> > 00:29:10 Build Failed. 5 errors, 0 warnings. (took 419ms)
> > 
> > 
> > $ locate opencv_core.so.3.4
> > /usr/lib64/libopencv_core.so.3.4
> > /usr/lib64/libopencv_core.so.3.4.4
> > 
> > I have already added /usr/lib64/ and /usr/lib/ as library search
> > paths in eclipse.
> > 
> > Is there anything missing in my config?
> > 
> > Regards,
> > -- 
> > Danishka Navin
> > 
> 
> Did you check if the make file supports make config?  If so run that
> before the make.

Regards,
Les H
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Re: OpenCV with Eclipse on Fedora 30

2020-02-06 Thread Danishka Navin 
On Fri, Feb 7, 2020 at 4:07 AM George N. White III  wrote:

> On Thu, 6 Feb 2020 at 15:04, Danishka Navin  wrote:
>
>> Hi,
>>
>> I am new to eclipse and opencv and I was trying to build a sample c++
>> code using Eclipse.
>>
>> I have installed following packages.
>> rpm -qa | grep opencv
>> opencv-devel-3.4.4-10.fc30.x86_64
>> opencv-3.4.4-10.fc30.x86_64
>> opencv-core-3.4.4-10.fc30.x86_64
>> opencv-contrib-3.4.4-10.fc30.x86_64
>>
>>
>> 00:29:09  Incremental Build of configuration Debug for project sample
>> 
>> make all
>> Building target: sample
>> Invoking: GCC C++ Linker
>> g++ -L/usr/lib64/ -L/usr/lib/ -o "sample"  ./main.o
>> -llibopencv_core.so.3.4 -llibopencv_core.so.3.4.4
>> -llibopencv_highgui.so.3.4 -llibopencv_highgui.so.3.4.4
>>
>
> libopencv_core.so.3.4 should be a symbolic link to libopencv_core.so.3.4.4,
> same for libopencv_highgui.so.3.4.
>

that's right

$ ls -l /usr/lib64/libopencv_core.so*
lrwxrwxrwx 1 root root  21 May 21  2019 /usr/lib64/libopencv_core.so ->
libopencv_core.so.3.4
lrwxrwxrwx 1 root root  23 May 21  2019
/usr/lib64/libopencv_core.so.3.4 -> libopencv_core.so.3.4.4
-rwxr-xr-x 1 root root 4898472 May 21  2019
/usr/lib64/libopencv_core.so.3.4.4

$ ls -l /usr/lib64/libopencv_highgui.so*
lrwxrwxrwx 1 root root 24 May 21  2019 /usr/lib64/libopencv_highgui.so
-> libopencv_highgui.so.3.4
lrwxrwxrwx 1 root root 26 May 21  2019
/usr/lib64/libopencv_highgui.so.3.4 -> libopencv_highgui.so.3.4.4
-rwxr-xr-x 1 root root 425512 May 21  2019
/usr/lib64/libopencv_highgui.so.3.4.4


> Try:
>
> g++ -o "sample"  ./main.o -lopencv_core -lopencv_highgui
>


no errors

[danishka@2000 Debug]$ pwd
/home/danishka/workspace/sample/Debug
[danishka@2000 Debug]$ ls
main.d  main.o  makefile  objects.mk  sources.mk  subdir.mk
[danishka@2000 Debug]$ g++ -o "sample"  ./main.o -lopencv_core
-lopencv_highgui
[danishka@2000 Debug]$ ls
main.d  main.o  makefile  objects.mk  sample  sources.mk  subdir.mk
[danishka@2000 Debug]$ ls -l
total 124
-rw-rw-r-- 1 danishka danishka20 Feb  7 00:26 main.d
-rw-rw-r-- 1 danishka danishka 54040 Feb  7 00:26 main.o
-rw-rw-r-- 1 danishka danishka  1318 Feb  7 00:29 makefile
-rw-rw-r-- 1 danishka danishka   337 Feb  7 00:29 objects.mk
-rwxrwxr-x 1 danishka danishka 48224 Feb  7 09:19 sample
-rw-rw-r-- 1 danishka danishka   526 Feb  7 00:29 sources.mk
-rw-rw-r-- 1 danishka danishka   708 Feb  7 00:29 subdir.mk


> Stackoverflow
> 
>  has
> this among other solutions.
>
>
>> /usr/bin/ld: cannot find -llibopencv_core.so.3.4
>> /usr/bin/ld: cannot find -llibopencv_core.so.3.4.4
>> /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4
>> /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4.4
>> collect2: error: ld returned 1 exit status
>> make: *** [makefile:46: sample] Error 1
>> "make all" terminated with exit code 2. Build might be incomplete.
>>
>> 00:29:10 Build Failed. 5 errors, 0 warnings. (took 419ms)
>>
>>
>> $ locate opencv_core.so.3.4
>> /usr/lib64/libopencv_core.so.3.4
>> /usr/lib64/libopencv_core.so.3.4.4
>>
>> I have already added /usr/lib64/ and /usr/lib/ as library search paths in
>> eclipse.
>>
>> Is there anything missing in my config?
>>
>> Regards,
>> --
>> Danishka Navin
>>
>>
> --
> George N. White III
>
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-- 
Danishka Navin
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Re: OpenCV with Eclipse on Fedora 30

2020-02-06 Thread George N. White III 
On Thu, 6 Feb 2020 at 15:04, Danishka Navin  wrote:

> Hi,
>
> I am new to eclipse and opencv and I was trying to build a sample c++ code
> using Eclipse.
>
> I have installed following packages.
> rpm -qa | grep opencv
> opencv-devel-3.4.4-10.fc30.x86_64
> opencv-3.4.4-10.fc30.x86_64
> opencv-core-3.4.4-10.fc30.x86_64
> opencv-contrib-3.4.4-10.fc30.x86_64
>
>
> 00:29:09  Incremental Build of configuration Debug for project sample
> 
> make all
> Building target: sample
> Invoking: GCC C++ Linker
> g++ -L/usr/lib64/ -L/usr/lib/ -o "sample"  ./main.o
> -llibopencv_core.so.3.4 -llibopencv_core.so.3.4.4
> -llibopencv_highgui.so.3.4 -llibopencv_highgui.so.3.4.4
>

libopencv_core.so.3.4 should be a symbolic link to libopencv_core.so.3.4.4,
same for libopencv_highgui.so.3.4. Try:

g++ -o "sample"  ./main.o -lopencv_core -lopencv_highgui

Stackoverflow

has
this among other solutions.


> /usr/bin/ld: cannot find -llibopencv_core.so.3.4
> /usr/bin/ld: cannot find -llibopencv_core.so.3.4.4
> /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4
> /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4.4
> collect2: error: ld returned 1 exit status
> make: *** [makefile:46: sample] Error 1
> "make all" terminated with exit code 2. Build might be incomplete.
>
> 00:29:10 Build Failed. 5 errors, 0 warnings. (took 419ms)
>
>
> $ locate opencv_core.so.3.4
> /usr/lib64/libopencv_core.so.3.4
> /usr/lib64/libopencv_core.so.3.4.4
>
> I have already added /usr/lib64/ and /usr/lib/ as library search paths in
> eclipse.
>
> Is there anything missing in my config?
>
> Regards,
> --
> Danishka Navin
>
>
-- 
George N. White III
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Re: OpenCV with Eclipse on Fedora 30

2020-02-06 Thread Howard Howell 
On Fri, 2020-02-07 at 00:33 +0530, Danishka Navin wrote:
> Hi,
> 
> I am new to eclipse and opencv and I was trying to build a sample c++
> code using Eclipse.
> 
> I have installed following packages. 
> rpm -qa | grep opencv
> opencv-devel-3.4.4-10.fc30.x86_64
> opencv-3.4.4-10.fc30x86_64
> opencv-core-3.4.4-10.fc30.x86_64
> opencv-contrib-3.4.4-10.fc30x86_64
> 
> 
> 
> 
> 00:29:09  Incremental Build of configuration Debug for project
> sample 
> make all 
> Building target: sample
> Invoking: GCC C++ Linker
> g++ -L/usr/lib64/ -L/usr/lib/ -o "sample"  ./main.o  
> -llibopencv_core.so.3.4 -llibopencv_core.so.3.4.4
> -llibopencv_highgui.so.3.4 -llibopencv_highgui.so.3.4.4
> /usr/bin/ld: cannot find -llibopencv_core.so.3.4
> /usr/bin/ld: cannot find -llibopencv_core.so.3.4.4
> /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4
> /usr/bin/ld: cannot find -llibopencv_highgui.so.3.4.4
> collect2: error: ld returned 1 exit status
> make: *** [makefile:46: sample] Error 1
> "make all" terminated with exit code 2. Build might be incomplete.
> 
> 00:29:10 Build Failed. 5 errors, 0 warnings. (took 419ms)
> 
> 
> $ locate opencv_core.so.3.4
> /usr/lib64/libopencv_core.so.3.4
> /usr/lib64/libopencv_core.so.3.4.4
> 
> I have already added /usr/lib64/ and /usr/lib/ as library search
> paths in eclipse.
> 
> Is there anything missing in my config?
> 
> Regards,
> -- 
> Danishka Navin
> 
I haven't done this in a while, but there were some changes to bash
environment I seem to remember.  Either LIBRARY_PATH or LD_LIBRARY_PATH
or something similar.  I've completely rebuilt my system since then, so
I don't have the old bashrc to check.  But the opencv stuff documents
it on their webpage I think.

REgards,
Les H
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OpenCV with Eclipse on Fedora 30

2020-02-06 Thread Danishka Navin 
Hi,

I am new to eclipse and opencv and I was trying to build a sample c++ code
using Eclipse.

I have installed following packages.
rpm -qa | grep opencv
opencv-devel-3.4.4-10.fc30.x86_64
opencv-3.4.4-10.fc30.x86_64
opencv-core-3.4.4-10.fc30.x86_64
opencv-contrib-3.4.4-10.fc30.x86_64




00:29:09  Incremental Build of configuration Debug for project sample

make all
Building target: sample
Invoking: GCC C++ Linker
g++ -L/usr/lib64/ -L/usr/lib/ -o "sample"  ./main.o
-llibopencv_core.so.3.4 -llibopencv_core.so.3.4.4
-llibopencv_highgui.so.3.4 -llibopencv_highgui.so.3.4.4
/usr/bin/ld: cannot find -llibopencv_core.so.3.4
/usr/bin/ld: cannot find -llibopencv_core.so.3.4.4
/usr/bin/ld: cannot find -llibopencv_highgui.so.3.4
/usr/bin/ld: cannot find -llibopencv_highgui.so.3.4.4
collect2: error: ld returned 1 exit status
make: *** [makefile:46: sample] Error 1
"make all" terminated with exit code 2. Build might be incomplete.

00:29:10 Build Failed. 5 errors, 0 warnings. (took 419ms)


$ locate opencv_core.so.3.4
/usr/lib64/libopencv_core.so.3.4
/usr/lib64/libopencv_core.so.3.4.4

I have already added /usr/lib64/ and /usr/lib/ as library search paths in
eclipse.

Is there anything missing in my config?

Regards,
-- 
Danishka Navin
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