Update autoconf from 2.69 to 2.70

docker/Dockerfile

@@ -32,6 +32,12 @@ RUN manylinux-entrypoint /build_scripts/install-runtime-packages.sh && rm /build
 
 COPY build_scripts/build_utils.sh /build_scripts/
 
+COPY build_scripts/install-autoconf.sh /build_scripts/
+RUN export AUTOCONF_ROOT=autoconf-2.70 && \
+    export AUTOCONF_HASH=f05f410fda74323ada4bdc4610db37f8dbd556602ba65bc843edb4d4d4a1b2b7 && \
+    export AUTOCONF_DOWNLOAD_URL=http://ftp.gnu.org/gnu/autoconf && \
+    manylinux-entrypoint /build_scripts/install-autoconf.sh
+
 COPY build_scripts/install-automake.sh /build_scripts/
 RUN export AUTOMAKE_ROOT=automake-1.16.2 && \
     export AUTOMAKE_HASH=b2f361094b410b4acbf4efba7337bdb786335ca09eb2518635a09fb7319ca5c1 && \

docker/build_scripts/install-autoconf.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+# Top-level build script called from Dockerfile
+
+# Stop at any error, show all commands
+set -exuo pipefail
+
+# Get script directory
+MY_DIR=$(dirname "${BASH_SOURCE[0]}")
+
+# Get build utilities
+source $MY_DIR/build_utils.sh
+
+
+# Install newest autoconf
+check_var ${AUTOCONF_ROOT}
+check_var ${AUTOCONF_HASH}
+check_var ${AUTOCONF_DOWNLOAD_URL}
+
+AUTOCONF_VERSION=${AUTOCONF_ROOT#*-}
+if autoconf --version > /dev/null 2>&1; then
+	INSTALLED=$(autoconf --version | head -1 | awk '{ print $NF }')
+	SMALLEST=$(echo -e "${INSTALLED}\n${AUTOCONF_VERSION}" | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | head -1)
+	if [ "${SMALLEST}" == "${AUTOCONF_VERSION}" ]; then
+		echo "skipping installation of autoconf ${AUTOCONF_VERSION}, system provides autoconf ${INSTALLED}"
+		exit 0
+	fi
+fi
+
+
+fetch_source ${AUTOCONF_ROOT}.tar.gz ${AUTOCONF_DOWNLOAD_URL}
+check_sha256sum ${AUTOCONF_ROOT}.tar.gz ${AUTOCONF_HASH}
+tar -zxf ${AUTOCONF_ROOT}.tar.gz
+pushd ${AUTOCONF_ROOT}
+DESTDIR=/manylinux-rootfs do_standard_install
+popd
+rm -rf ${AUTOCONF_ROOT} ${AUTOCONF_ROOT}.tar.gz
+
+# Strip what we can
+strip_ /manylinux-rootfs
+
+# Install
+cp -rf /manylinux-rootfs/* /
+
+# Remove temporary rootfs
+rm -rf /manylinux-rootfs
+
+hash -r
+autoconf --version