/usr/bin/ld: 找不到

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

Answer 1

将-L/opt/lib添加到编译器参数中，这会使编译器和链接器在该文件夹中搜索libcalc.so的路径。

Answer 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

Answer 3

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

Answer 4

您需要添加-L/opt/lib来告诉ld在那里查找共享对象。

Answer 5

export LDFLAGS=-L/path to lib/ 这将解决错误