In the update from 6.7.2 to 6.7.3, commit `ea0f00d5d` changed how linker flags like `ws2_32` are treated when generating pri/prl files. Specifically, before the commit a flag like `ws2_32` was left untouched. The above commit changed it such that such flags are converted to `-lws2_32` (seemingly in order to better support FFmpeg, according to the commit message). However, this change also affects absolute paths if the file has no extension. That is, after the above mentioned commit, an absolute path linker flag to, say, a dylib on macOS without a suffix will result in prepending the `-l` flag. This will result in errors during link time. An example where this caused problems can be found in the nixpkgs PR draft #367206 (https://github.com/NixOS/nixpkgs/pull/367206). This adds a small check to ensure that `-l` is not prepended if the linker flag is an absolute path without a suffix. Change-Id: I2c7ce3aac6624e1a27c59af233e3da2c1ae7ba60 Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>