mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2024-12-21 05:43:09 +00:00
71 lines
3.0 KiB
Plaintext
71 lines
3.0 KiB
Plaintext
|
# ===========================================================================
|
||
|
|
# 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
|