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dnl #
dnl # The majority of the python scripts are written to be compatible
dnl # with Python 2.6 and Python 3.4. Therefore, they may be installed
dnl # and used with either interpreter. This option is intended to
dnl # to provide a method to specify the default system version, and
dnl # set the PYTHON environment variable accordingly.
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PYTHON], [
AC_ARG_WITH([python],
AC_HELP_STRING([--with-python[=VERSION]],
[default system python version @<:@default=check@:>@]),
[with_python=$withval],
[with_python=check])
AS_CASE([$with_python],
[check], [AC_CHECK_PROGS([PYTHON], [python3 python2], [:])],
[2*], [PYTHON="python${with_python}"],
[*python2*], [PYTHON="${with_python}"],
[3*], [PYTHON="python${with_python}"],
[*python3*], [PYTHON="${with_python}"],
[no], [PYTHON=":"],
[AC_MSG_ERROR([Unknown --with-python value '$with_python'])]
)
dnl #
dnl # Minimum supported Python versions for utilities:
dnl # Python 2.6 or Python 3.4
dnl #
AM_PATH_PYTHON([], [], [:])
AS_IF([test -z "$PYTHON_VERSION"], [
PYTHON_VERSION=$(basename $PYTHON | tr -cd 0-9.)
])
PYTHON_MINOR=${PYTHON_VERSION#*\.}
AS_CASE([$PYTHON_VERSION],
[2.*], [
AS_IF([test $PYTHON_MINOR -lt 6],
[AC_MSG_ERROR("Python >= 2.6 is required")])
],
[3.*], [
AS_IF([test $PYTHON_MINOR -lt 4],
[AC_MSG_ERROR("Python >= 3.4 is required")])
],
[:|2|3], [],
[PYTHON_VERSION=3]
)
AM_CONDITIONAL([USING_PYTHON], [test "$PYTHON" != :])
AM_CONDITIONAL([USING_PYTHON_2], [test "x${PYTHON_VERSION%%\.*}" = x2])
AM_CONDITIONAL([USING_PYTHON_3], [test "x${PYTHON_VERSION%%\.*}" = x3])
AM_COND_IF([USING_PYTHON_2],
[AC_SUBST([PYTHON_SHEBANG], [python2])],
[AC_SUBST([PYTHON_SHEBANG], [python3])])
dnl #
dnl # Request that packages be built for a specific Python version.
dnl #
AS_IF([test "x$with_python" != xcheck], [
PYTHON_PKG_VERSION=$(echo $PYTHON_VERSION | tr -d .)
DEFINE_PYTHON_PKG_VERSION='--define "__use_python_pkg_version '${PYTHON_PKG_VERSION}'"'
DEFINE_PYTHON_VERSION='--define "__use_python '${PYTHON}'"'
], [
DEFINE_PYTHON_VERSION=''
DEFINE_PYTHON_PKG_VERSION=''
])
AC_SUBST(DEFINE_PYTHON_VERSION)
AC_SUBST(DEFINE_PYTHON_PKG_VERSION)
])
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