In /usr/bin/x86_64-linux-gnu-qmake line 17:
	$QMAKE_MODE \
        ^---------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
	"$QMAKE_MODE" \


In /usr/bin/x86_64-linux-gnu-qmake line 20:
	QMAKE_CC=${CC:-x86_64-linux-gnu-gcc} \
                 ^-------------------------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
	QMAKE_CC="${CC:-x86_64-linux-gnu-gcc}" \


In /usr/bin/x86_64-linux-gnu-qmake line 21:
	QMAKE_CXX=${CXX:-x86_64-linux-gnu-g++} \
                  ^--------------------------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
	QMAKE_CXX="${CXX:-x86_64-linux-gnu-g++}" \


In /usr/bin/x86_64-linux-gnu-qmake line 22:
	QMAKE_LINK=${CXX:-x86_64-linux-gnu-g++} \
                   ^--------------------------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
	QMAKE_LINK="${CXX:-x86_64-linux-gnu-g++}" \


In /usr/bin/x86_64-linux-gnu-qmake line 23:
	QMAKE_STRIP=${STRIP:-x86_64-linux-gnu-strip} \
                    ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
	QMAKE_STRIP="${STRIP:-x86_64-linux-gnu-strip}" \

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...