CppApplication { name: "p" property string linkerVariant Probe { id: gccProbe property bool isGcc: qbs.toolchain.contains("gcc") configure: { console.info("is GCC: " + isGcc); if (isGcc) found = true; } } Properties { condition: gccProbe.found cpp.linkerVariant: linkerVariant } files: "main.cpp" }