Building qmake requires full C++11, which boils down to gcc >= 5.0, which is what upstream advertises as a requirement anyway: https://doc.qt.io/qt-5.15/supported-platforms.html Distribution | Architecture | Compiler Generic Linux | x86 and x86_64 | GCC (5 or later), ICC 18.x Fixes: http://autobuild.buildroot.org/results/c3e/c3ee971a72f268e72b69a647e8fd00a8cee7dc91/ http://autobuild.buildroot.org/results/89c/89c9a88b4e1195e952528574263201d4fbc27570/ [...] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> Cc: Peter Seiderer <ps.report@gmx.net> Cc: Julien Corjon <corjon.j@ecagroup.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>