Make sure "docs" and "dist" exactly once in SRC_DIST_DIRS.
MERGE TO STABLE
#
# Files to include in source distributions
#
#
# Files to include in source distributions
#
-SRC_DIST_DIRS += docs distrib $(SUBDIRS)
+SRC_DIST_DIRS += docs distrib $(filter-out docs distrib,$(SUBDIRS))
SRC_DIST_FILES += \
configure.ac config.guess config.sub configure \
aclocal.m4 README Makefile Makefile.config install-sh \
SRC_DIST_FILES += \
configure.ac config.guess config.sub configure \
aclocal.m4 README Makefile Makefile.config install-sh \