Given a_SOURCES = aprog/main.c aprog/foo.c aprog/bar.c aprog/baz.c ...
The more source files there are to be listed, the longer that line gets, the bigger the Makefile.am fragment becomes, etc. I am thinking about how to cut that repetition down. Current automake likely won't have anything in store already, so I'm thinking of editing automake and targeting a future automake release. The syntax would need to be understood by automake and expanded at the right time; Makefile.in should have the expanded list already. How about recognizing the gmake function syntax? a_SOURCES = $(addprefix aprog/,main.c foo.c bar.c baz.c)