Error Encountered: "usr/bin/ld: cannot find -l"

When attempting to compile a program, you may encounter the following error message:

usr/bin/ld: cannot find -l

This error indicates that the linker cannot locate the specified library while linking your executable. To resolve this issue, we will delve into the details of how to specify library paths and direct the linker to the correct location.

Adding Library Search Paths

One possible cause of this error is missing library search paths in your Makefile. To resolve it, you can add an option to the linker command to specify where to look for libraries.

For example, if your library is located in a directory called "/myLib", you can add the following line to your Makefile:

LDFLAGS  = -L/myLib

This will add "/myLib" to the linker's search path, allowing it to locate the library.

Symlinking Libraries

Another possible issue is that your library is a symbolic link to a different library. In such cases, the linker may have trouble resolving the symbolic link. To address this, create a symlink to the versioned library file instead. For example, if your library is named "myLib.so" and its versioned file is "myLib.so.1", create a symlink as follows:

ln -s myLib.so.1 myLib.so

Running the Linker in Verbose Mode

For further diagnostics, consider running the linker in verbose mode. This will provide detailed output about the linking process and help you identify any additional issues:

ld -l --verbose

By examining the output, you can determine what the linker is searching for and troubleshoot any errors or missing dependencies.