问题
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
回答1:
Add -L/opt/lib to your compiler parameters, this makes the compiler and linker search that path for libcalc.so in that folder.
回答2:
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
回答3:
You need to add -L/opt/lib to tell ld to look there for shared objects.
回答4:
@Alwin Doss You should provide the -L option before -l. You would have done the other way round probably. Try this :)
来源：https://stackoverflow.com/questions/5329638/usr-bin-ld-cannot-find