+# Coreutils is unusual in that it generates some of its test-related
+# Makefile.am files. That must be done before invoking automake.
+mam_template=tests/Makefile.am.in
+if test -f $mam_template; then
+ PERL=perl
+ for tool in cut head join pr sort tac tail test tr uniq wc; do
+ m=tests/$tool/Makefile.am
+ t=${m}t
+ rm -f $m $t
+ sed -n '1,/^##test-files-begin/p' $mam_template > $t
+ echo "x = $tool" >> $t
+ srcdir=tests/$tool
+ $PERL -I$srcdir -w -- tests/mk-script $srcdir --list >> $t
+ sed -n '/^##test-files-end/,$p' $mam_template >> $t
+ chmod -w $t
+ mv $t $m
+ done
+fi
+
+# Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
+# gnulib-populated directories. Such .m4 files would cause aclocal to fail.
+# The following requires GNU find 4.2.3 or newer. Considering the usual
+# portability constraints of this script, that may seem a very demanding
+# requirement, but it should be ok. Ignore any failure, which is fine,
+# since this is only a convenience to help developers avoid the relatively
+# unusual case in which a symlinked-to .m4 file is git-removed from gnulib
+# between successive runs of this script.
+find "$m4_base" "$source_base" \
+ -depth \( -name '*.m4' -o -name '*.[ch]' \) \
+ -type l -xtype l -delete > /dev/null 2>&1