ax_build_date_epoch

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.

Source Code

Download the latest version of ax_build_date_epoch.m4 or browse the macro’s revision history.

License

Copyright © 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.