/usr/bin/ld: cannot find

Question

I created a .so file and put it in the location /opt/lib and added this path to LD_LIBRARY_PATH now after this when I try to compile my main program with the following command:

g++ -Wall -I/home/alwin/Development/Calculator/ main.cpp -lcalc -o calculator

I get the following error:

/usr/bin/ld: cannot find -lcalc
collect2: ld returned 1 exit status

Can someone help me with this. I created the shared library using the code blocks IDE

score 26 · Accepted Answer · edited Jan 20 '17 at 18:45

26

Add -L/opt/lib to your compiler parameters, this makes the compiler and linker search that path for libcalc.so in that folder.

edited Jan 20 '17 at 18:45

Meninx - メネンックス

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answered Mar 16 '11 at 18:02

Dr. Snoopy

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Oh yeah I tried that too, still I got the same error :( see the following alwin@alwin-laptop:~/Desktop/CPPTest$ g++ -Wall -I/home/alwin/Development/Calculator/ -L/opt/lib main.cpp -libcalc.so -o calculator /usr/bin/ld: cannot find -libcalc.so collect2: ld returned 1 exit status – Alwin Doss Mar 16 '11 at 19:53
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@Jay it's -lcalc, not -libcalc.so – Dr. Snoopy Mar 16 '11 at 21:51

score 3 · Answer 2 · edited Dec 20 '14 at 18:51

3

When you make the call to gcc it should say

g++ -Wall -I/home/alwin/Development/Calculator/ -L/opt/lib main.cpp -lcalc -o calculator

not -libcalc.so

I have a similar problem with auto-generated makes.

You can create a soft link from your compile directory to the library directory. Then the library becomes "local".

cd /compile/directory

ln -s  /path/to/libcalc.so libcalc.so

edited Dec 20 '14 at 18:51

samayo

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answered Jul 02 '13 at 18:24

otter

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score 2 · Answer 3 · answered Oct 29 '12 at 09:37

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@Alwin Doss You should provide the -L option before -l. You would have done the other way round probably. Try this :)

answered Oct 29 '12 at 09:37

Sunil

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score 2 · Answer 4 · answered Mar 16 '11 at 18:01

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You need to add -L/opt/lib to tell ld to look there for shared objects.

answered Mar 16 '11 at 18:01

geekosaur

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Like I already mentioned in the previous comment, I did add -L/opt/lib is there anything else that I am missing :( – Alwin Doss Mar 16 '11 at 19:56

score 0 · Answer 5 · answered May 20 '22 at 06:42

0

export LDFLAGS=-L/path to lib/ this will solve the error

answered May 20 '22 at 06:42

sahil sharma

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/usr/bin/ld: cannot find

5 Answers5

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