Allow configure to deal with Python 3.0. Changes were:

print foo --> print(foo)
string.join(...) --> ' '.join(...)

These changes are backward compatible.

The actual plpython module appears to need significant updates to support
Python 3.0, though.  This change just relieves interested developers from
having to deal with Autoconf.

Author: petere

config/python.m4

@@ -1,7 +1,7 @@
 #
 # Autoconf macros for configuring the build of Python extension modules
 #
-# $PostgreSQL: pgsql/config/python.m4,v 1.14 2006/10/16 17:24:54 petere Exp $
+# $PostgreSQL: pgsql/config/python.m4,v 1.15 2009/01/04 00:54:15 petere Exp $
 #
 
 # PGAC_PATH_PYTHON
@@ -30,9 +30,9 @@ else
     AC_MSG_ERROR([distutils module not found])
 fi
 AC_MSG_CHECKING([Python configuration directory])
-python_version=`${PYTHON} -c "import sys; print sys.version[[:3]]"`
-python_configdir=`${PYTHON} -c "from distutils.sysconfig import get_python_lib as f; import os; print os.path.join(f(plat_specific=1,standard_lib=1),'config')"`
-python_includespec=`${PYTHON} -c "import distutils.sysconfig; print '-I'+distutils.sysconfig.get_python_inc()"`
+python_version=`${PYTHON} -c "import sys; print(sys.version[[:3]])"`
+python_configdir=`${PYTHON} -c "from distutils.sysconfig import get_python_lib as f; import os; print(os.path.join(f(plat_specific=1,standard_lib=1),'config'))"`
+python_includespec=`${PYTHON} -c "import distutils.sysconfig; print('-I'+distutils.sysconfig.get_python_inc())"`
 
 AC_SUBST(python_version)[]dnl
 AC_SUBST(python_configdir)[]dnl
@@ -54,9 +54,9 @@ 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=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('LIBDIR')))"`
-python_ldlibrary=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('LDLIBRARY')))"`
-python_so=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('SO')))"`
+python_libdir=`${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}"
@@ -70,7 +70,7 @@ else
 	python_libspec="-L${python_libdir} -lpython${python_version}"
 fi
 
-python_additional_libs=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('LIBS','LIBC','LIBM','LOCALMODLIBS','BASEMODLIBS')))"`
+python_additional_libs=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBS','LIBC','LIBM','LOCALMODLIBS','BASEMODLIBS'))))"`
 
 AC_MSG_RESULT([${python_libspec} ${python_additional_libs}])
 
@@ -80,7 +80,7 @@ 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=`${PYTHON} -c "import sys; print int('thread' in sys.builtin_module_names)"`
+pythreads=`${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

configure

@@ -6899,9 +6899,9 @@ echo "$as_me: error: distutils module not found" >&2;}
 fi
 { echo "$as_me:$LINENO: checking Python configuration directory" >&5
 echo $ECHO_N "checking Python configuration directory... $ECHO_C" >&6; }
-python_version=`${PYTHON} -c "import sys; print sys.version[:3]"`
-python_configdir=`${PYTHON} -c "from distutils.sysconfig import get_python_lib as f; import os; print os.path.join(f(plat_specific=1,standard_lib=1),'config')"`
-python_includespec=`${PYTHON} -c "import distutils.sysconfig; print '-I'+distutils.sysconfig.get_python_inc()"`
+python_version=`${PYTHON} -c "import sys; print(sys.version[:3])"`
+python_configdir=`${PYTHON} -c "from distutils.sysconfig import get_python_lib as f; import os; print(os.path.join(f(plat_specific=1,standard_lib=1),'config'))"`
+python_includespec=`${PYTHON} -c "import distutils.sysconfig; print('-I'+distutils.sysconfig.get_python_inc())"`
 
 # This should be enough of a message.
 { echo "$as_me:$LINENO: result: $python_configdir" >&5
@@ -6911,9 +6911,9 @@ echo "${ECHO_T}$python_configdir" >&6; }
 { echo "$as_me:$LINENO: checking how to link an embedded Python application" >&5
 echo $ECHO_N "checking how to link an embedded Python application... $ECHO_C" >&6; }
 
-python_libdir=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('LIBDIR')))"`
-python_ldlibrary=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('LDLIBRARY')))"`
-python_so=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('SO')))"`
+python_libdir=`${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}"
@@ -6927,7 +6927,7 @@ else
 	python_libspec="-L${python_libdir} -lpython${python_version}"
 fi
 
-python_additional_libs=`${PYTHON} -c "import distutils.sysconfig,string; print string.join(filter(None,distutils.sysconfig.get_config_vars('LIBS','LIBC','LIBM','LOCALMODLIBS','BASEMODLIBS')))"`
+python_additional_libs=`${PYTHON} -c "import distutils.sysconfig,string; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBS','LIBC','LIBM','LOCALMODLIBS','BASEMODLIBS'))))"`
 
 { echo "$as_me:$LINENO: result: ${python_libspec} ${python_additional_libs}" >&5
 echo "${ECHO_T}${python_libspec} ${python_additional_libs}" >&6; }
@@ -6936,7 +6936,7 @@ echo "${ECHO_T}${python_libspec} ${python_additional_libs}" >&6; }
 # threaded python is not supported on bsd's
 { echo "$as_me:$LINENO: checking whether Python is compiled with thread support" >&5
 echo $ECHO_N "checking whether Python is compiled with thread support... $ECHO_C" >&6; }
-pythreads=`${PYTHON} -c "import sys; print int('thread' in sys.builtin_module_names)"`
+pythreads=`${PYTHON} -c "import sys; print(int('thread' in sys.builtin_module_names))"`
 if test "$pythreads" = "1"; then
   { echo "$as_me:$LINENO: result: yes" >&5
 echo "${ECHO_T}yes" >&6; }