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Diffstat (limited to 'm4/ax_prog_date.m4')
| -rw-r--r-- | m4/ax_prog_date.m4 | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/m4/ax_prog_date.m4 b/m4/ax_prog_date.m4 new file mode 100644 index 0000000..c85f0f2 --- /dev/null +++ b/m4/ax_prog_date.m4 @@ -0,0 +1,137 @@ +# =========================================================================== +# https://www.gnu.org/software/autoconf-archive/ax_prog_date.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_PROG_DATE() +# +# DESCRIPTION +# +# This macro tries to determine the type of the date (1) command and some +# of its non-standard capabilities. +# +# The type is determined as follow: +# +# * If the version string contains "GNU", then: +# - The variable ax_cv_prog_date_gnu is set to "yes". +# - The variable ax_cv_prog_date_type is set to "gnu". +# +# * If date supports the "-v 1d" option, then: +# - The variable ax_cv_prog_date_bsd is set to "yes". +# - The variable ax_cv_prog_date_type is set to "bsd". +# +# * If both previous checks fail, then: +# - The variable ax_cv_prog_date_type is set to "unknown". +# +# The following capabilities of GNU date are checked: +# +# * If date supports the --date arg option, then: +# - The variable ax_cv_prog_date_gnu_date is set to "yes". +# +# * If date supports the --utc arg option, then: +# - The variable ax_cv_prog_date_gnu_utc is set to "yes". +# +# The following capabilities of BSD date are checked: +# +# * If date supports the -v 1d option, then: +# - The variable ax_cv_prog_date_bsd_adjust is set to "yes". +# +# * If date supports the -r arg option, then: +# - The variable ax_cv_prog_date_bsd_date is set to "yes". +# +# All the aforementioned variables are set to "no" before a check is +# performed. +# +# LICENSE +# +# Copyright (c) 2017 Enrico M. Crisostomo <enrico.m.crisostomo@gmail.com> +# +# 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 <http://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 3 + +AC_DEFUN([AX_PROG_DATE], [dnl + AC_CACHE_CHECK([for GNU date], [ax_cv_prog_date_gnu], [ + ax_cv_prog_date_gnu=no + if date --version 2>/dev/null | head -1 | grep -q GNU + then + ax_cv_prog_date_gnu=yes + fi + ]) + AC_CACHE_CHECK([for BSD date], [ax_cv_prog_date_bsd], [ + ax_cv_prog_date_bsd=no + if date -v 1d > /dev/null 2>&1 + then + ax_cv_prog_date_bsd=yes + fi + ]) + AC_CACHE_CHECK([for date type], [ax_cv_prog_date_type], [ + ax_cv_prog_date_type=unknown + if test "x${ax_cv_prog_date_gnu}" = "xyes" + then + ax_cv_prog_date_type=gnu + elif test "x${ax_cv_prog_date_bsd}" = "xyes" + then + ax_cv_prog_date_type=bsd + fi + ]) + AS_VAR_IF([ax_cv_prog_date_gnu], [yes], [ + AC_CACHE_CHECK([whether GNU date supports --date], [ax_cv_prog_date_gnu_date], [ + ax_cv_prog_date_gnu_date=no + if date --date=@1512031231 > /dev/null 2>&1 + then + ax_cv_prog_date_gnu_date=yes + fi + ]) + AC_CACHE_CHECK([whether GNU date supports --utc], [ax_cv_prog_date_gnu_utc], [ + ax_cv_prog_date_gnu_utc=no + if date --utc > /dev/null 2>&1 + then + ax_cv_prog_date_gnu_utc=yes + fi + ]) + ]) + AS_VAR_IF([ax_cv_prog_date_bsd], [yes], [ + AC_CACHE_CHECK([whether BSD date supports -r], [ax_cv_prog_date_bsd_date], [ + ax_cv_prog_date_bsd_date=no + if date -r 1512031231 > /dev/null 2>&1 + then + ax_cv_prog_date_bsd_date=yes + fi + ]) + ]) + AS_VAR_IF([ax_cv_prog_date_bsd], [yes], [ + AC_CACHE_CHECK([whether BSD date supports -v], [ax_cv_prog_date_bsd_adjust], [ + ax_cv_prog_date_bsd_adjust=no + if date -v 1d > /dev/null 2>&1 + then + ax_cv_prog_date_bsd_adjust=yes + fi + ]) + ]) +])dnl AX_PROG_DATE |