$ shellcheck configure

In configure line 233:
if command -v $cccmd >/dev/null; then
              ^----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
if command -v "$cccmd" >/dev/null; then


In configure line 234:
    if $cccmd "$tmpc" $CFLAGS -o "${tmpc}.out"; then
                      ^-----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 
    if $cccmd "$tmpc" "$CFLAGS" -o "${tmpc}.out"; then

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