Moved the intricacies of the perl interface build into its own makefile

that now functions as a wrapper around the MakeMaker stuff. It might
even behave sensically when we have separate build dirs. Same for plperl,
which of course still doesn't work very well. Made sure that plperl
respects the choice of --libdir.

Added --with-python to automatically build and install the Python interface.
Works similarly to the Perl5 stuff.

Moved the burden of the distclean targets lower down into the source tree.
Eventually, each make file should have its own.

Added automatic remaking of makefiles and configure. Currently only for the
top-level because of a bug(?) in Autoconf. Use GNU `missing' to work around
missing autoconf and aclocal. Start factoring out macros into their own
config/*.m4 files to increase readability and organization.

1 files changed, 79 insertions, 0 deletions

diff --git a/aclocal.m4 b/aclocal.m4
new file mode 100644
index 0000000000..173b933e01
--- /dev/null
+++ b/aclocal.m4
@@ -0,0 +1,79 @@
+dnl aclocal.m4 generated automatically by aclocal 1.4
+
+dnl Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+dnl PARTICULAR PURPOSE.
+
+#
+# Autoconf macros for configuring the build of Python extension modules
+#
+# $Header: /cvsroot/pgsql/aclocal.m4,v 1.1 2000/06/10 18:01:34 petere Exp $
+#
+
+# PGAC_PROG_PYTHON
+# ----------------
+# Look for Python and set the output variable `PYTHON'
+# to `python' if found, empty otherwise.
+AC_DEFUN([PGAC_PROG_PYTHON],
+[AC_CHECK_PROG(PYTHON, python, python)])
+
+
+# PGAC_PATH_PYTHONDIR
+# -------------------
+# Finds the names of various install dirs and helper files
+# necessary to build a Python extension module.
+#
+# It would be nice if we could check whether the current setup allows
+# the build of the shared module. Future project.
+AC_DEFUN([PGAC_PATH_PYTHONDIR],
+[AC_REQUIRE([PGAC_PROG_PYTHON])
+[if test "${PYTHON+set}" = set ; then
+  python_version=`${PYTHON} -c "import sys; print sys.version[:3]"`
+  python_prefix=`${PYTHON} -c "import sys; print sys.prefix"`
+  python_execprefix=`${PYTHON} -c "import sys; print sys.exec_prefix"`
+  python_configdir="${python_execprefix}/lib/python${python_version}/config"
+  python_moduledir="${python_prefix}/lib/python${python_version}"
+  python_extmakefile="${python_configdir}/Makefile.pre.in"]
+
+  AC_MSG_CHECKING(for Python extension makefile)
+  if test -f "${python_extmakefile}" ; then
+    AC_MSG_RESULT(found)
+  else
+    AC_MSG_RESULT(no)
+    AC_MSG_ERROR(
+[The Python extension makefile was expected at \`${python_extmakefile}\'
+but does not exist. This means the Python module cannot be built automatically.])
+  fi
+
+  AC_SUBST(python_version)
+  AC_SUBST(python_prefix)
+  AC_SUBST(python_execprefix)
+  AC_SUBST(python_configdir)
+  AC_SUBST(python_moduledir)
+  AC_SUBST(python_extmakefile)
+else
+  AC_MSG_ERROR([Python not found])
+fi])# PGAC_PATH_PYTHONDIR
+
+dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
+dnl The program must properly implement --version.
+AC_DEFUN(AM_MISSING_PROG,
+[AC_MSG_CHECKING(for working $2)
+# Run test in a subshell; some versions of sh will print an error if
+# an executable is not found, even if stderr is redirected.
+# Redirect stdin to placate older versions of autoconf.  Sigh.
+if ($2 --version) < /dev/null > /dev/null 2>&1; then
+   $1=$2
+   AC_MSG_RESULT(found)
+else
+   $1="$3/missing $2"
+   AC_MSG_RESULT(missing)
+fi
+AC_SUBST($1)])
+