ax_prog_mysql.m4

# ===========================================================================
#      https://www.gnu.org/software/autoconf-archive/ax_prog_mysql.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_PROG_MYSQL
#
# DESCRIPTION
#
#   Check for the program 'mysql' let script continue if exists & works pops
#   up error message if not.
#
#   Testing of functionality is by invoking it with root password 'rootpass'
#   and a 'SELECT * FROM user' SQL statement. That SQL statement will select
#   all user information from the 'user' privileges table, and should work
#   on every proper MySQL server.
#
#   Besides checking mysql, this macro also set these environment variables
#   upon completion:
#
#     MYSQL = which mysql
#
# LICENSE
#
#   Copyright (c) 2008 Gleen Salmon <gleensalmon@yahoo.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 2 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/>.
#
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#serial 6

AU_ALIAS([AC_PROG_MYSQL], [AX_PROG_MYSQL])
AC_DEFUN([AX_PROG_MYSQL],[
AC_REQUIRE([AC_EXEEXT])dnl
AC_PATH_PROG(MYSQL, mysql$EXEEXT, nocommand)
if test "$MYSQL" = nocommand; then
        AC_MSG_ERROR([mysql not found in $PATH])
fi
AC_MSG_CHECKING([if mysql works])
if echo 'SELECT * FROM user' | $MYSQL -u root -prootpass mysql > /dev/null; then
        AC_MSG_RESULT([yes])
else
        AC_MSG_NOTICE([Before installation, set MySQL root password to rootpass; restore your root password afterwards.])
        AC_MSG_ERROR([mysql cannot execute SELECT with root password = rootpass])
fi;dnl
])