QMake: Referencing a library using relative paths

Question

I have a Qt project using SQLite, so I have the following directory structure: ``` C:\Workspace\MyProject\MyProject.pro C:\Workspace\MyProject\sqlite3\sqlite3.lib ``` Adding sqlite3.lib with absolute paths works fine: ``` LIBS += -L"c:/Workspace/MyProject/sqlite3" -lsqlite3 ``` But I can't make it work with relative paths. I try with: ``` LIBS += -L"sqlite3" -lsqlite3 ``` But that fails with: ``` :-1: error: LNK1104: cannot open file 'sqlite3\sqlite3.lib' ``` I tried but `LIBS += -L"../sqlite3"` or even `LIBS += -L"../../sqlite3"`, but that didn't work either. I'm using MSVC 2008 for the compiler toolchain.

Accepted Answer

Since it's possible to build from different directory than project directory, relative path pointing to project directory should be prefixed with `$$PWD/` (`PWD` qmake variable contains absolute path to directory with currently processed `*.pro` file).

Your line would look like:

```
LIBS += -L"$$PWD/sqlite3" -lsqlite3
```

QMake: Referencing a library using relative paths

Solution

Problem