postgresql/config/python.m4
Peter Eisentraut f8c2029ef0 Improve detection of Python 3.2 installations
Because of ABI tagging, the library version number might no longer be
exactly the Python version number, so do extra lookups.  This affects
installations without a shared library, such as ActiveState's
installer.

Also update the way to detect the location of the 'config' directory,
which can also be versioned.

Ashesh Vashi
2011-08-18 14:43:16 +03:00

103 lines
3.8 KiB
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#
# Autoconf macros for configuring the build of Python extension modules
#
# config/python.m4
#
# PGAC_PATH_PYTHON
# ----------------
# Look for Python and set the output variable 'PYTHON'
# to 'python' if found, empty otherwise.
AC_DEFUN([PGAC_PATH_PYTHON],
[AC_PATH_PROG(PYTHON, python)
if test x"$PYTHON" = x""; then
AC_MSG_ERROR([Python not found])
fi
])
# _PGAC_CHECK_PYTHON_DIRS
# -----------------------
# Determine the name of various directories of a given Python installation.
AC_DEFUN([_PGAC_CHECK_PYTHON_DIRS],
[AC_REQUIRE([PGAC_PATH_PYTHON])
AC_MSG_CHECKING([for Python distutils module])
if "${PYTHON}" -c 'import distutils' 2>&AS_MESSAGE_LOG_FD
then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
AC_MSG_ERROR([distutils module not found])
fi
AC_MSG_CHECKING([Python configuration directory])
python_majorversion=`${PYTHON} -c "import sys; print(sys.version[[0]])"`
python_version=`${PYTHON} -c "import sys; print(sys.version[[:3]])"`
python_configdir=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBPL'))))"`
python_includespec=`${PYTHON} -c "import distutils.sysconfig; print('-I'+distutils.sysconfig.get_python_inc())"`
AC_SUBST(python_majorversion)[]dnl
AC_SUBST(python_version)[]dnl
AC_SUBST(python_configdir)[]dnl
AC_SUBST(python_includespec)[]dnl
# This should be enough of a message.
AC_MSG_RESULT([$python_configdir])
])# _PGAC_CHECK_PYTHON_DIRS
# PGAC_CHECK_PYTHON_EMBED_SETUP
# -----------------------------
#
# Note: selecting libpython from python_configdir works in all Python
# releases, but it generally finds a non-shared library, which means
# that we are binding the python interpreter right into libplpython.so.
# In Python 2.3 and up there should be a shared library available in
# the main library location.
AC_DEFUN([PGAC_CHECK_PYTHON_EMBED_SETUP],
[AC_REQUIRE([_PGAC_CHECK_PYTHON_DIRS])
AC_MSG_CHECKING([how to link an embedded Python application])
python_libdir=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBDIR'))))"`
python_ldlibrary=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LDLIBRARY'))))"`
python_so=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('SO'))))"`
ldlibrary=`echo "${python_ldlibrary}" | sed "s/${python_so}$//"`
if test x"${python_libdir}" != x"" -a x"${python_ldlibrary}" != x"" -a x"${python_ldlibrary}" != x"${ldlibrary}"
then
# New way: use the official shared library
ldlibrary=`echo "${ldlibrary}" | sed "s/^lib//"`
python_libspec="-L${python_libdir} -l${ldlibrary}"
else
# Old way: use libpython from python_configdir
python_libdir="${python_configdir}"
# LDVERSION was introduced in Python 3.2.
python_ldversion=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LDVERSION'))))"`
if test x"${python_ldversion}" = x""; then
python_ldversion=$python_version
fi
python_libspec="-L${python_libdir} -lpython${python_ldversion}"
fi
python_additional_libs=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBS','LIBC','LIBM','BASEMODLIBS'))))"`
AC_MSG_RESULT([${python_libspec} ${python_additional_libs}])
AC_SUBST(python_libdir)[]dnl
AC_SUBST(python_libspec)[]dnl
AC_SUBST(python_additional_libs)[]dnl
# threaded python is not supported on bsd's
AC_MSG_CHECKING(whether Python is compiled with thread support)
pythreads=`${PYTHON} -c "import sys; print(int('thread' in sys.builtin_module_names))"`
if test "$pythreads" = "1"; then
AC_MSG_RESULT(yes)
case $host_os in
openbsd*|freebsd*)
AC_MSG_ERROR([threaded Python not supported on this platform])
;;
esac
else
AC_MSG_RESULT(no)
fi
])# PGAC_CHECK_PYTHON_EMBED_SETUP