+# -------------------------------------------------------------- #
+# Run the testsuite with the least supported autoconf version. #
+# -------------------------------------------------------------- #
+
+gnu-ftp = http://ftp.gnu.org/gnu
+
+# Various shorthands: version, name, package name, tarball name,
+# tarball location, installation directory.
+ac-v = $(required_autoconf_version)
+ac-n = autoconf
+ac-p = $(ac-n)-$(ac-v)
+ac-t = $(ac-p).tar.gz
+ac-l = maintainer/$(ac-t)
+ac-d = maintainer/$(ac-p)
+
+fetch-minimal-autoconf: o = $(ac-l)
+fetch-minimal-autoconf:
+ $(AM_V_at)$(MKDIR_P) $(dir $o)
+ $(AM_V_at)rm -f $o $o-t
+ $(AM_V_GEN)$(WGET) -O $o-t $(gnu-ftp)/$(ac-n)/$(ac-t)
+ $(AM_V_at)chmod a-w $o-t && mv -f $o-t $o && ls -l $o
+.PHONY: fetch-minimal-autoconf
+
+build-minimal-autoconf:
+ $(AM_V_GEN):; \
+ test -f $(ac-l) || { \
+ echo "$@: tarball $(ac-l) seems missing." >&2; \
+ echo "$@: have you run '$(MAKE) fetch-minimal-autoconf'?" >&2; \
+ exit 1; \
+ }; \
+ set -x \
+ && $(PERL) $(srcdir)/t/ax/deltree.pl $(ac-d) \
+ && $(MKDIR_P) $(ac-d) \
+ && cd $(ac-d) \
+ && tar xzf '$(CURDIR)/$(ac-l)' \
+ && mv $(ac-p) src \
+ && mkdir build \
+ && cd build \
+ && env CONFIG_SHELL='$(SHELL)' $(SHELL) ../src/configure \
+ --prefix='$(CURDIR)/$(ac-d)' CONFIG_SHELL='$(SHELL)' \
+ && $(MAKE) install
+ $(AM_V_at)echo ' ======' && $(ac-d)/bin/autoconf --version
+.PHONY: build-minimal-autoconf
+
+check-minimal-autoconf:
+ $(AM_V_at)p='$(ac-d)/bin/autoconf'; \
+ if test ! -f "$$p" || test ! -x "$$p"; then \
+ echo "$@: program '$$p' seems missing." >&2; \
+ echo "$@: have you run '$(MAKE) build-minimal-autoconf'?" >&2; \
+ exit 1; \
+ fi
+ $(AM_V_GEN): \
+ && PATH='$(CURDIR)/$(ac-d)/bin$(PATH_SEPARATOR)'$$PATH \
+ && export PATH \
+ && AUTOCONF=autoconf \
+ && AUTOHEADER=autoheader \
+ && AUTORECONF=autoreconf \
+ && AUTOM4TE=autom4te \
+ && AUTOUPDATE=autoupdate \
+ && export AUTOCONF AUTOHEADER AUTORECONF AUTOM4TE AUTOUPDATE \
+ && echo === check autoconf version '(must be = $(ac-v))' \
+ && autoconf --version \
+ && autoconf --version | sed -e 's/^/ /; s/$$/ /' -e 1q \
+ | $(FGREP) '$(ac-v)' >/dev/null \
+ && echo === configure \
+ && $(srcdir)/configure $(shell ./config.status --config) \
+ && echo === build and test \
+ && $(MAKE) check
+.PHONY: check-minimal-autoconf
+
+