ac_prog_mysql

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

AC_DEFUN([AC_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
])