I missed this in my prior commit because it doesn't matter in non-VPATH
builds.
Per buildfarm.
# $(srcdir) to the build directory.
ifdef VPATH
-remaining_files_src := $(wildcard $(srcdir)/*/*.pgc) $(wildcard $(srcdir)/expected/*.c) $(wildcard $(srcdir)/expected/*.stdout) $(wildcard $(srcdir)/expected/*.stderr) $(srcdir)/resultmap
+remaining_files_src := $(wildcard $(srcdir)/*/*.pgc) $(wildcard $(srcdir)/expected/*.c) $(wildcard $(srcdir)/expected/*.stdout) $(wildcard $(srcdir)/expected/*.stderr)
remaining_files_build := $(patsubst $(srcdir)/%, $(abs_builddir)/%, $(remaining_files_src))
all: $(remaining_files_build)