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137 lines
4.8 KiB
137 lines
4.8 KiB
# =========================================================================== |
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# https://www.gnu.org/software/autoconf-archive/ax_prog_date.html |
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# =========================================================================== |
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# |
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# SYNOPSIS |
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# |
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# AX_PROG_DATE() |
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# |
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# DESCRIPTION |
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# |
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# This macro tries to determine the type of the date (1) command and some |
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# of its non-standard capabilities. |
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# |
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# The type is determined as follow: |
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# |
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# * If the version string contains "GNU", then: |
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# - The variable ax_cv_prog_date_gnu is set to "yes". |
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# - The variable ax_cv_prog_date_type is set to "gnu". |
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# |
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# * If date supports the "-v 1d" option, then: |
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# - The variable ax_cv_prog_date_bsd is set to "yes". |
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# - The variable ax_cv_prog_date_type is set to "bsd". |
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# |
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# * If both previous checks fail, then: |
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# - The variable ax_cv_prog_date_type is set to "unknown". |
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# |
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# The following capabilities of GNU date are checked: |
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# |
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# * If date supports the --date arg option, then: |
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# - The variable ax_cv_prog_date_gnu_date is set to "yes". |
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# |
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# * If date supports the --utc arg option, then: |
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# - The variable ax_cv_prog_date_gnu_utc is set to "yes". |
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# |
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# The following capabilities of BSD date are checked: |
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# |
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# * If date supports the -v 1d option, then: |
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# - The variable ax_cv_prog_date_bsd_adjust is set to "yes". |
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# |
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# * If date supports the -r arg option, then: |
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# - The variable ax_cv_prog_date_bsd_date is set to "yes". |
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# |
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# All the aforementioned variables are set to "no" before a check is |
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# performed. |
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# |
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# LICENSE |
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# |
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# Copyright (c) 2017 Enrico M. Crisostomo <enrico.m.crisostomo@gmail.com> |
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# |
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# This program is free software: you can redistribute it and/or modify it |
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# under the terms of the GNU General Public License as published by the |
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# Free Software Foundation, either version 3 of the License, or (at your |
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# option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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# Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License along |
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# with this program. If not, see <http://www.gnu.org/licenses/>. |
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# |
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# As a special exception, the respective Autoconf Macro's copyright owner |
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# gives unlimited permission to copy, distribute and modify the configure |
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# scripts that are the output of Autoconf when processing the Macro. You |
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# need not follow the terms of the GNU General Public License when using |
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# or distributing such scripts, even though portions of the text of the |
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# Macro appear in them. The GNU General Public License (GPL) does govern |
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# all other use of the material that constitutes the Autoconf Macro. |
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# |
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# This special exception to the GPL applies to versions of the Autoconf |
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# Macro released by the Autoconf Archive. When you make and distribute a |
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# modified version of the Autoconf Macro, you may extend this special |
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# exception to the GPL to apply to your modified version as well. |
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#serial 3 |
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AC_DEFUN([AX_PROG_DATE], [dnl |
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AC_CACHE_CHECK([for GNU date], [ax_cv_prog_date_gnu], [ |
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ax_cv_prog_date_gnu=no |
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if date --version 2>/dev/null | head -1 | grep -q GNU |
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then |
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ax_cv_prog_date_gnu=yes |
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fi |
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]) |
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AC_CACHE_CHECK([for BSD date], [ax_cv_prog_date_bsd], [ |
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ax_cv_prog_date_bsd=no |
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if date -v 1d > /dev/null 2>&1 |
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then |
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ax_cv_prog_date_bsd=yes |
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fi |
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]) |
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AC_CACHE_CHECK([for date type], [ax_cv_prog_date_type], [ |
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ax_cv_prog_date_type=unknown |
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if test "x${ax_cv_prog_date_gnu}" = "xyes" |
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then |
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ax_cv_prog_date_type=gnu |
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elif test "x${ax_cv_prog_date_bsd}" = "xyes" |
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then |
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ax_cv_prog_date_type=bsd |
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fi |
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]) |
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AS_VAR_IF([ax_cv_prog_date_gnu], [yes], [ |
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AC_CACHE_CHECK([whether GNU date supports --date], [ax_cv_prog_date_gnu_date], [ |
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ax_cv_prog_date_gnu_date=no |
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if date --date=@1512031231 > /dev/null 2>&1 |
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then |
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ax_cv_prog_date_gnu_date=yes |
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fi |
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]) |
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AC_CACHE_CHECK([whether GNU date supports --utc], [ax_cv_prog_date_gnu_utc], [ |
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ax_cv_prog_date_gnu_utc=no |
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if date --utc > /dev/null 2>&1 |
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then |
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ax_cv_prog_date_gnu_utc=yes |
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fi |
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]) |
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]) |
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AS_VAR_IF([ax_cv_prog_date_bsd], [yes], [ |
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AC_CACHE_CHECK([whether BSD date supports -r], [ax_cv_prog_date_bsd_date], [ |
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ax_cv_prog_date_bsd_date=no |
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if date -r 1512031231 > /dev/null 2>&1 |
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then |
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ax_cv_prog_date_bsd_date=yes |
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fi |
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]) |
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]) |
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AS_VAR_IF([ax_cv_prog_date_bsd], [yes], [ |
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AC_CACHE_CHECK([whether BSD date supports -v], [ax_cv_prog_date_bsd_adjust], [ |
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ax_cv_prog_date_bsd_adjust=no |
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if date -v 1d > /dev/null 2>&1 |
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then |
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ax_cv_prog_date_bsd_adjust=yes |
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fi |
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]) |
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]) |
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])dnl AX_PROG_DATE
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