hallo all!
gambas-gb-cairo seems to contain bad directory structure:
here an extract of pacman -Ql:
gambas3-gb-cairo /build/gambas3/pkg/gambas3-gb-cairo/usr/lib/gambas3/gambas3/gb.cairo.component
gambas3-gb-cairo /build/gambas3/pkg/gambas3-gb-cairo/usr/lib/gambas3/gambas3/gb.cairo.la
gambas3-gb-cairo /build/gambas3/pkg/gambas3-gb-cairo/usr/lib/gambas3/gambas3/gb.cairo.so
gambas3-gb-cairo /build/gambas3/pkg/gambas3-gb-cairo/usr/lib/gambas3/gambas3/gb.cairo.so.0
gambas3-gb-cairo /build/gambas3/pkg/gambas3-gb-cairo/usr/lib/gambas3/gambas3/gb.cairo.so.0.0.0