--- /dev/null
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_build_date_epoch.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_BUILD_DATE_EPOCH(VARIABLE[, FORMAT[, ACTION-IF-FAIL]])
+#
+# DESCRIPTION
+#
+# Sets VARIABLE to a string representing the current time. It is
+# formatted according to FORMAT if specified, otherwise it is formatted as
+# the number of seconds (excluding leap seconds) since the UNIX epoch (01
+# Jan 1970 00:00:00 UTC).
+#
+# If the SOURCE_DATE_EPOCH environment variable is set, it uses the value
+# of that variable instead of the current time. See
+# https://reproducible-builds.org/specs/source-date-epoch). If
+# SOURCE_DATE_EPOCH is set but cannot be properly interpreted as a UNIX
+# timestamp, then execute ACTION-IF-FAIL if specified, otherwise error.
+#
+# VARIABLE is AC_SUBST-ed.
+#
+# LICENSE
+#
+# Copyright (c) 2016 Eric Bavier <bavier@member.fsf.org>
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+# Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception, the respective Autoconf Macro's copyright owner
+# gives unlimited permission to copy, distribute and modify the configure
+# scripts that are the output of Autoconf when processing the Macro. You
+# need not follow the terms of the GNU General Public License when using
+# or distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
+#
+# This special exception to the GPL applies to versions of the Autoconf
+# Macro released by the Autoconf Archive. When you make and distribute a
+# modified version of the Autoconf Macro, you may extend this special
+# exception to the GPL to apply to your modified version as well.
+
+#serial 2
+
+AC_DEFUN([AX_BUILD_DATE_EPOCH],
+[dnl
+AC_MSG_CHECKING([for build time])
+ax_date_fmt="m4_default($2,%s)"
+AS_IF([test x"$SOURCE_DATE_EPOCH" = x],
+ [$1=`date "+$ax_date_fmt"`],
+ [ax_build_date=`date -u -d "@$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null \
+ || date -u -r "$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null`
+ AS_IF([test x"$ax_build_date" = x],
+ [m4_ifval([$3],
+ [$3],
+ [AC_MSG_ERROR([malformed SOURCE_DATE_EPOCH])])],
+ [$1=$ax_build_date])])
+AC_MSG_RESULT([$$1])
+])dnl AX_BUILD_DATE_EPOCH
GCC_DOCKER_LINTFLAGS='-syntax'
fi
-CONFIG_DATE=`date +%Y%m%d`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for build time" >&5
+printf %s "checking for build time... " >&6; }
+ax_date_fmt="%Y%m%d"
+if test x"$SOURCE_DATE_EPOCH" = x
+then :
+ CONFIG_DATE=`date "+$ax_date_fmt"`
+else $as_nop
+ ax_build_date=`date -u -d "@$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null \
+ || date -u -r "$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null`
+ if test x"$ax_build_date" = x
+then :
+ as_fn_error $? "malformed SOURCE_DATE_EPOCH" "$LINENO" 5
+else $as_nop
+ CONFIG_DATE=$ax_build_date
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CONFIG_DATE" >&5
+printf "%s\n" "$CONFIG_DATE" >&6; }
+
# Checks for libraries.
version=1.22.1
-date=`date +'%b %e, %Y'`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for build time" >&5
+printf %s "checking for build time... " >&6; }
+ax_date_fmt="%b %e, %Y"
+if test x"$SOURCE_DATE_EPOCH" = x
+then :
+ date=`date "+$ax_date_fmt"`
+else $as_nop
+ ax_build_date=`date -u -d "@$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null \
+ || date -u -r "$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null`
+ if test x"$ax_build_date" = x
+then :
+ as_fn_error $? "malformed SOURCE_DATE_EPOCH" "$LINENO" 5
+else $as_nop
+ date=$ax_build_date
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $date" >&5
+printf "%s\n" "$date" >&6; }
+
ac_config_files="$ac_config_files Makefile doc/example.conf doc/libunbound.3 doc/unbound.8 doc/unbound-anchor.8 doc/unbound-checkconf.8 doc/unbound.conf.5 doc/unbound-control.8 doc/unbound-host.1 smallapp/unbound-control-setup.sh dnstap/dnstap_config.h dnscrypt/dnscrypt_config.h contrib/libunbound.pc contrib/unbound.socket contrib/unbound.service contrib/unbound_portable.service"
# Process this file with autoconf to produce a configure script.
AC_PREREQ([2.56])
sinclude(acx_nlnetlabs.m4)
+sinclude(ax_build_date_epoch.m4)
sinclude(ax_pthread.m4)
sinclude(acx_python.m4)
sinclude(ax_pkg_swig.m4)
GCC_DOCKER_LINTFLAGS='-syntax'
AC_SUBST(GCC_DOCKER_LINTFLAGS)
fi
-CONFIG_DATE=`date +%Y%m%d`
+AX_BUILD_DATE_EPOCH(CONFIG_DATE, [%Y%m%d])
AC_SUBST(CONFIG_DATE)
# Checks for libraries.
dnl if we build from source tree, the man pages need @date@ and @version@
dnl if this is a distro tarball, that was already done by makedist.sh
AC_SUBST(version, [VERSION_MAJOR.VERSION_MINOR.VERSION_MICRO])
-AC_SUBST(date, [`date +'%b %e, %Y'`])
+AX_BUILD_DATE_EPOCH(date, [[%b %e, %Y]])
+AC_SUBST(date)
AC_CONFIG_FILES([Makefile doc/example.conf doc/libunbound.3 doc/unbound.8 doc/unbound-anchor.8 doc/unbound-checkconf.8 doc/unbound.conf.5 doc/unbound-control.8 doc/unbound-host.1 smallapp/unbound-control-setup.sh dnstap/dnstap_config.h dnscrypt/dnscrypt_config.h contrib/libunbound.pc contrib/unbound.socket contrib/unbound.service contrib/unbound_portable.service])
AC_CONFIG_HEADERS([config.h])