One of the most common operations in a makefile is turning a number of source files into one target file (for example, a program binary).
bin_PROGRAMS = bug-buddy bug_buddy_SOURCES = \ $(bb_built_sources) \ bug-buddy.c \ bug-buddy.h \ md5-utils.c \ md5-utils.h \ bugzilla.c \ bugzilla.h \ cell-renderer-uri.c \ cell-renderer-uri.h \ config.c \ gdb-buddy.c \ libglade-buddy.h \ save-buddy.c \ save-buddy.h \ signal-buddy.c \ signal-buddy.h \ united-states-of-bug-buddy.c |
Aside from the $(bb_built_sources) variable, everything here should be clear.
The bug-buddy file is a program and will be installed in the bindir location when make install is run.