Hi everyone,
Sorry for the cross-posting here but it touches both Autoconf and
Automake in some way...
I recently worked to implement a standard configure/Makefile.in file
pair for Python-based GNU projects. In the process, I implemented a
large number of Autoconf macros. Well, in fact, a lot were taken from
python.m4 that is included with Automake. However, in that file, many
tests are done in one macro, whereas I've broken them down into
individual macros, such that the user can decide what tests they
actually want. I furthermore implemented Python as a language in
Autoconf, so you can do things like AC_LANG_PROG to call arbitrary
Python code.
Since this task of implementing configure scripts for Python packages
was considered to be of rather high importance by rms et al., I'm
wondering how best to submit these macros. There are other Python macros
in the Autoconf Macro Archive, however they are limited and sadly
out-of-date (ie they only check for Python versions up to 2.6, when 2.7+
and 3.2+ are available).
python.m4 in Automake is much more complete, and these macros are the
direct decendents of that file, but to me at least, it's confusing that
these macros should be implemented in Automake and not in Autoconf (or
Autoconf Archive for that matter). So I'm not sure if they should be
submitted to that project.
So, please let me know how best to proceed with the macros. If any work
needs to be done to make them fit better, I'd be happy to help. For
example, the macros are all in the "PC_" namespace ("Python Configure")
since I didn't know where they'd end up....that would need to be
changed.
I've attached the macro file to this email, or you can find it here:
http://bzr.savannah.gnu.org/lh/gsrc/trunk/annotate/head:/util/python-configure/m4/python.m4
Regards,
Brandon Invergo
# Copyright 2012 Brandon Invergo <brandon@xxxxxxxxxxx>
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved. This file is offered as-is,
# without any warranty.
# Many of these macros were adapted from ones written by Andrew Dalke
# and James Henstridge and are included with the Automake utility
# under the following copyright terms:
#
# Copyright (C) 1999-2012 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# Table of Contents:
#
# 1. Language selection
# and routines to produce programs in a given language.
#
# 2. Producing programs in a given language.
#
# 3. Looking for a compiler
# And possibly the associated preprocessor.
#
# 4. Looking for specific libs & functionality
## ----------------------- ##
## 1. Language selection. ##
## ----------------------- ##
# AC_LANG(Python)
# ---------------
AC_LANG_DEFINE([Python], [py], [PY], [PYTHON], [],
[ac_ext=py
ac_compile='chmod +x conftest.$ac_ext >&AS_MESSAGE_LOG_FD'
ac_link='chmod +x conftest.$ac_ext && cp conftest.$ac_ext conftest >&AS_MESSAGE_LOG_FD'
])
# AC_LANG_PYTHON
# --------------
AU_DEFUN([AC_LANG_PYTHON], [AC_LANG(Python)])
## ----------------------- ##
## 2. Producing programs. ##
## ----------------------- ##
# AC_LANG_PROGRAM(Python)([PROLOGUE], [BODY])
# -------------------------------------------
m4_define([AC_LANG_PROGRAM(Python)], [dnl
@%:@!$PYTHON
$1
m4_if([$2], [], [], [dnl
if __name__ == '__main__':
$2])])
# _AC_LANG_IO_PROGRAM(Python)
# ---------------------------
# Produce source that performs I/O.
m4_define([_AC_LANG_IO_PROGRAM(Python)],
[AC_LANG_PROGRAM([dnl
import sys
try:
h = open('conftest.out')
except:
sys.exit(1)
else:
close(h)
sys.exit(0)
], [])])
# _AC_LANG_CALL(Python)([PROLOGUE], [FUNCTION])
# ---------------------
# Produce source that calls FUNCTION
m4_define([_AC_LANG_CALL(Python)],
[AC_LANG_PROGRAM([$1], [$2])])
## -------------------------------------------- ##
## 3. Looking for Compilers and Interpreters. ##
## -------------------------------------------- ##
AC_DEFUN([AC_LANG_COMPILER(Python)],
[AC_REQUIRE([AC_PROG_PYTHON])])
# AC_PROG_PYTHON(PROG-TO-CHECK-FOR)
# ---------------------------------
# Find a Python interpreter. Python versions prior to 2.0 are not
# supported. (2.0 was released on October 16, 2000).
AC_DEFUN([AC_PROG_PYTHON],
[AC_ARG_VAR([PYTHON], [the Python interpreter])
m4_define_default([_PC_PYTHON_INTERPRETER_LIST],
[python python3 python3.2 python3.1 python3.0 python2 python2.7 dnl
python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0])
m4_ifval([$1],
[AC_PATH_PROGS(PYTHON, [$1 _PC_PYTHON_INTERPRETER_LIST])],
[AC_PATH_PROGS(PYTHON, [_PC_PYTHON_INTERPRETER_LIST])])
])
# PC_PYTHON_PROG_PYTHON_CONFIG(PROG-TO-CHECK-FOR)
# ----------------------------------------------
# Find the python-config program
AC_DEFUN([PC_PYTHON_PROG_PYTHON_CONFIG],
[AC_REQUIRE([AC_PROG_PYTHON])[]dnl
AC_ARG_VAR([PYTHON_CONFIG], [the Python-config program])
m4_define([_PYTHON_BASENAME], [`basename $PYTHON`])
m4_ifval([$1],
[AC_PATH_PROGS(PYTHON_CONFIG, [$1 _PYTHON_BASENAME-config])],
[AC_PATH_PROG(PYTHON_CONFIG, _PYTHON_BASENAME-config)])
]) # PC_PYTHON_PROG_PYTHON_CONFIG
# PC_PYTHON_VERIFY_VERSION(VERSION, [ACTION-IF-TRUE], [ACTION-IF-NOT-FOUND])
# ---------------------------------------------------------------------------
# Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
# Run ACTION-IF-FALSE otherwise.
# This test uses sys.hexversion instead of the string equivalent (first
# word of sys.version), in order to cope with versions such as 2.2c1.
# This supports Python 2.0 or higher. (2.0 was released on October 16, 2000).
AC_DEFUN([PC_PYTHON_VERIFY_VERSION],
[AC_REQUIRE([AC_PROG_PYTHON])[]dnl
m4_define([pc_python_safe_ver], m4_bpatsubsts($1, [\.], [_]))
AC_CACHE_CHECK([if Python >= '$1'],
[[pc_cv_python_min_version_]pc_python_safe_ver],
[AC_LANG_PUSH(Python)[]dnl
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([dnl
import sys
], [dnl
# split strings by '.' and convert to numeric. Append some zeros
# because we need at least 4 digits for the hex conversion.
# map returns an iterator in Python 3.0 and a list in 2.x
minver = list(map(int, '$1'.split('.'))) + [[0, 0, 0]]
minverhex = 0
# xrange is not present in Python 3.0 and range returns an iterator
for i in list(range(4)):
minverhex = (minverhex << 8) + minver[[i]]
sys.exit(sys.hexversion < minverhex)
])],
[[pc_cv_python_min_version_]pc_python_safe_ver="yes"],
[[pc_cv_python_min_version_]pc_python_safe_ver="no"])
AC_LANG_POP(Python)[]dnl
])
AS_IF([test "$[pc_cv_python_min_version_]pc_python_safe_ver" = "no"], [$3], [$2])
])# PC_PYTHON_VERIFY_VERSION
# PC_PYTHON_CHECK_VERSION
# -----------------------
# Query Python for its version number. Getting [:3] seems to be
# the best way to do this; it's what "site.py" does in the standard
# library.
AC_DEFUN([PC_PYTHON_CHECK_VERSION],
[AC_REQUIRE([AC_PROG_PYTHON])[]dnl
AC_CACHE_CHECK([for $1 version],
[pc_cv_python_version],
[AC_LANG_PUSH(Python)[]dnl
AC_LANG_CONFTEST([
AC_LANG_PROGRAM([dnl
import sys
], [dnl
sys.stdout.write(sys.version[[:3]])
])])
pc_cv_python_version=`$PYTHON conftest.py`
AC_LANG_POP(Python)[]dnl
])
AC_SUBST([PYTHON_VERSION], [$pc_cv_python_version])
])# PC_PYTHON_CHECK_VERSION
# PC_PYTHON_CHECK_PREFIX
# ----------------------
# Use the value of $prefix for the corresponding value of
# PYTHON_PREFIX. This is made a distinct variable so it can be
# overridden if need be. However, general consensus is that you
# shouldn't need this ability.
AC_DEFUN([PC_PYTHON_CHECK_PREFIX],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python prefix], [pc_cv_python_prefix],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_prefix=`$PYTHON_CONFIG --prefix 2>> AS_MESSAGE_LOG_FD`
else
AC_LANG_PUSH(Python)[]dnl
pc_cv_python_prefix=AC_LANG_CONFTEST([AC_LANG_PROGRAM([dnl
import sys
], [dnl
sys.exit(sys.prefix)
])])
AC_LANG_POP(Python)[]dnl
fi])
AC_SUBST([PYTHON_PREFIX], [$pc_cv_python_prefix])])
# PC_PYTHON_CHECK_EXEC_PREFIX
# --------------------------
# Like above, but for $exec_prefix
AC_DEFUN([PC_PYTHON_CHECK_EXEC_PREFIX],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python exec-prefix], [pc_cv_python_exec_prefix],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_exec_prefix=`$PYTHON_CONFIG --exec-prefix 2>> AS_MESSAGE_LOG_FD`
else
AC_LANG_PUSH(Python)[]dnl
pc_cv_python_exec_prefix=AC_LANG_CONFTEST([AC_LANG_PROGRAM([dnl
import sys
], [dnl
sys.exit(sys.exec_prefix)
])])
AC_LANG_POP(Python)[]dnl
fi
])
AC_SUBST([PYTHON_EXEC_PREFIX], [$pc_cv_python_exec_prefix])])
# PC_PYTHON_CHECK_INCLUDES
# ------------------------
# Find the Python header file include flags (ie
# '-I/usr/include/python')
AC_DEFUN([PC_PYTHON_CHECK_INCLUDES],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python includes], [pc_cv_python_includes],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_includes=`$PYTHON_CONFIG --includes 2>> AS_MESSAGE_LOG_FD`
else
pc_cv_python_includes="[-I$includedir/$_PYTHON_BASENAME]m4_ifdef(PYTHON_ABI_FLAGS,
PYTHON_ABI_FLAGS,)"
fi
])
AC_SUBST([PYTHON_INCLUDES], [$pc_cv_python_includes])])
# PC_PYTHON_CHECK_HEADERS([ACTION-IF-PRESENT], [ACTION-IF-ABSENT])
# -----------------------
# Check for the presence and usability of Python.h
AC_DEFUN([PC_PYTHON_CHECK_HEADERS],
[AC_REQUIRE([PC_PYTHON_CHECK_INCLUDES])[]dnl
pc_cflags_store=$CPPFLAGS
CPPFLAGS="$CFLAGS $PYTHON_INCLUDES"
AC_CHECK_HEADER([Python.h], [$1], [$2])
CPPFLAGS=$pc_cflags_store
])
# PC_PYTHON_CHECK_LIBS
# --------------------
# Find the Python lib flags (ie '-lpython')
AC_DEFUN([PC_PYTHON_CHECK_LIBS],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python libs], [pc_cv_python_libs],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_libs=`$PYTHON_CONFIG --libs 2>> AS_MESSAGE_LOG_FD`
else
pc_cv_python_libs="[-l$_PYTHON_BASENAME]m4_ifdef(PYTHON_ABI_FLAGS, PYTHON_ABI_FLAGS,)"
fi
])
AC_SUBST([PYTHON_LIBS], [$pc_cv_python_libs])])
# PC_PYTHON_TEST_LIBS(LIBRARY-FUNCTION, [ACTION-IF-PRESENT], [ACTION-IF-ABSENT])
# -------------------
# Verify that the Python libs can be loaded
AC_DEFUN([PC_PYTHON_TEST_LIBS],
[AC_REQUIRE([PC_PYTHON_CHECK_LIBS])[]dnl
pc_libflags_store=$LIBS
for lflag in $PYTHON_LIBS; do
case $lflag in
-lpython*@:}@
LIBS="$LIBS $lflag"
pc_libpython=`echo $lflag | sed -e 's/^-l//'`
;;
*@:}@;;
esac
done
AC_CHECK_LIB([$pc_libpython], [$1], [$2], [$3])])
# PC_PYTHON_CHECK_CFLAGS
# ----------------------
# Find the Python CFLAGS
AC_DEFUN([PC_PYTHON_CHECK_CFLAGS],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python CFLAGS], [pc_cv_python_cflags],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_cflags=`$PYTHON_CONFIG --cflags 2>> AS_MESSAGE_LOG_FD`
else
pc_cv_python_cflags=
fi
])
AC_SUBST([PYTHON_CFLAGS], [$pc_cv_python_cflags])])
# PC_PYTHON_CHECK_LDFLAGS
# -----------------------
# Find the Python LDFLAGS
AC_DEFUN([PC_PYTHON_CHECK_LDFLAGS],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python LDFLAGS], [pc_cv_python_ldflags],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_ldflags=`$PYTHON_CONFIG --ldflags 2>> AS_MESSAGE_LOG_FD`
else
pc_cv_python_ldflags=
fi
])
AC_SUBST([PYTHON_LDFLAGS], [$pc_cv_python_ldflags])])
# PC_PYTHON_CHECK_EXTENSION_SUFFIX
# --------------------------------
# Find the Python extension suffix (i.e. '.cpython-32.so')
AC_DEFUN([PC_PYTHON_CHECK_EXTENSION_SUFFIX],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python extension suffix], [pc_cv_python_extension_suffix],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_extension_suffix=`$PYTHON_CONFIG --extension-suffix 2>> AS_MESSAGE_LOG_FD`
else
pc_cv_python_extension_suffix=
fi
])
AC_SUBST([PYTHON_EXTENSION_SUFFIX], [$pc_cv_python_extension_suffix])])
# PC_PYTHON_CHECK_ABI_FLAGS
# -------------------------
# Find the Python ABI flags
AC_DEFUN([PC_PYTHON_CHECK_ABI_FLAGS],
[AC_REQUIRE([PC_PYTHON_PROG_PYTHON_CONFIG])[]dnl
AC_CACHE_CHECK([for Python ABI flags], [pc_cv_python_abi_flags],
[if test -x "$PYTHON_CONFIG"; then
pc_cv_python_abi_flags=`$PYTHON_CONFIG --abiflags 2>> AS_MESSAGE_LOG_FD`
else
pc_cv_python_abi_flags=
fi
])
AC_SUBST([PYTHON_ABI_FLAGS], [$pc_cv_python_abi_flags])])
# PC_PYTHON_CHECK_PLATFORM
# ------------------------
# At times (like when building shared libraries) you may want
# to know which OS platform Python thinks this is.
AC_DEFUN([PC_PYTHON_CHECK_PLATFORM],
[AC_REQUIRE([AC_PROG_PYTHON])[]dnl
AC_CACHE_CHECK([for Python platform],
[pc_cv_python_platform],
[AC_LANG_PUSH(Python)[]dnl
AC_LANG_CONFTEST([
AC_LANG_PROGRAM([dnl
import sys
], [dnl
sys.stdout.write(sys.platform)
])])
pc_cv_python_platform=`$PYTHON conftest.py`
AC_LANG_POP(Python)[]dnl
])
AC_SUBST([PYTHON_PLATFORM], [$pc_cv_python_platform])
])
# PC_PYTHON_CHECK_SITE_DIR
# ---------------------
# The directory to which new libraries are installed (i.e. the
# "site-packages" directory.
AC_DEFUN([PC_PYTHON_CHECK_SITE_DIR],
[AC_REQUIRE([AC_PROG_PYTHON])AC_REQUIRE([PC_PYTHON_CHECK_PREFIX])[]dnl
AC_CACHE_CHECK([for Python site-packages directory],
[pc_cv_python_site_dir],
[AC_LANG_PUSH(Python)[]dnl
if test "x$prefix" = xNONE
then
pc_py_prefix=$ac_default_prefix
else
pc_py_prefix=$prefix
fi
AC_LANG_CONFTEST([
AC_LANG_PROGRAM([dnl
import sys
try:
import sysconfig
except:
from distutils import sysconfig
sitedir = sysconfig.get_python_lib(False, False, prefix='$pc_py_prefix')
else:
sitedir = sysconfig.get_path('purelib', vars={'base':'$pc_py_prefix'})
], [dnl
sys.stdout.write(sitedir)
])])
pc_cv_python_site_dir=`$PYTHON conftest.py`
AC_LANG_POP(Python)[]dnl
case $pc_cv_python_site_dir in
$pc_py_prefix*)
pc__strip_prefix=`echo "$pc_py_prefix" | sed 's|.|.|g'`
pc_cv_python_site_dir=`echo "$pc_cv_python_site_dir" | sed "s,^$pc__strip_prefix/,,"`
;;
*)
case $pc_py_prefix in
/usr|/System*) ;;
*)
pc_cv_python_site_dir=lib/python$PYTHON_VERSION/site-packages
;;
esac
;;
esac
])
AC_SUBST([pythondir], [\${prefix}/$pc_cv_python_site_dir])])# PC_PYTHON_CHECK_SITE_DIR
])
# PC_PYTHON_SITE_PACKAGE_DIR
# --------------------------
# $PACKAGE directory under PYTHON_SITE_DIR
AC_DEFUN([PC_PYTHON_SITE_PACKAGE_DIR],
[AC_REQUIRE([PC_PYTHON_CHECK_SITE_DIR])[]dnl
AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])])
# PC_PYTHON_CHECK_EXEC_DIR
# ------------------------
# directory for installing python extension modules (shared libraries)
AC_DEFUN([PC_PYTHON_CHECK_EXEC_DIR],
[AC_REQUIRE([AC_PROG_PYTHON])AC_REQUIRE([PC_PYTHON_CHECK_EXEC_PREFIX])[]dnl
AC_CACHE_CHECK([for Python extension module directory],
[pc_cv_python_exec_dir],
[AC_LANG_PUSH(Python)[]dnl
if test "x$pc_cv_python_exec_prefix" = xNONE
then
pc_py_exec_prefix=$pc_cv_python_prefix
else
pc_py_exec_prefix=$pc_cv_python_exec_prefix
fi
AC_LANG_CONFTEST([
AC_LANG_PROGRAM([dnl
import sys
try:
import sysconfig
except:
from distutils import sysconfig
sitedir = sysconfig.get_python_lib(True, False, prefix='$pc_py_exec_prefix')
else:
sitedir = sysconfig.get_path('platlib', vars={'platbase':'$pc_py_exec_prefix'})
], [dnl
sys.stdout.write(sitedir)
])])
pc_cv_python_exec_dir=`$PYTHON conftest.py`
AC_LANG_POP(Python)[]dnl
case $pc_cv_python_exec_dir in
$pc_py_exec_prefix*)
pc__strip_prefix=`echo "$pc_py_exec_prefix" | sed 's|.|.|g'`
pc_cv_python_exec_dir=`echo "$pc_cv_python_exec_dir" | sed "s,^$pc__strip_prefix/,,"`
;;
*)
case $pc_py_exec_prefix in
/usr|/System*) ;;
*)
pc_cv_python_exec_dir=lib/python$PYTHON_VERSION/site-packages
;;
esac
;;
esac
])
AC_SUBST([pyexecdir], [\${exec_prefix}/$pc_cv_python_pyexecdir])]) #PY_PYTHON_CHECK_EXEC_LIB_DIR
])
# PC_PYTHON_EXEC_PACKAGE_DIR
# --------------------------
# $PACKAGE directory under PYTHON_SITE_DIR
AC_DEFUN([PC_PYTHON_EXEC_PACKAGE_DIR],
[AC_REQUIRE([PC_PYTHON_CHECK_EXEC_DIR])[]dnl
AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])])
## -------------------------------------------- ##
## 4. Looking for specific libs & functionality ##
## -------------------------------------------- ##
# PC_PYTHON_CHECK_MODULE(LIBRARY, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
# ----------------------------------------------------------------------
# Macro for checking if a Python library is installed
AC_DEFUN([PC_PYTHON_CHECK_MODULE],
[AC_REQUIRE([AC_PROG_PYTHON])[]dnl
m4_define([pc_python_safe_mod], m4_bpatsubsts($1, [\.], [_]))
AC_CACHE_CHECK([for Python '$1' library],
[[pc_cv_python_module_]pc_python_safe_mod],
[AC_LANG_PUSH(Python)[]dnl
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([dnl
import sys
try:
import $1
except:
sys.exit(1)
else:
sys.exit(0)
], [])],
[[pc_cv_python_module_]pc_python_safe_mod="yes"],
[[pc_cv_python_module_]pc_python_safe_mod="no"])
AC_LANG_POP(Python)[]dnl
])
AS_IF([test "$[pc_cv_python_module_]pc_python_safe_mod" = "no"], [$3], [$2])
])# PC_PYTHON_CHECK_MODULE
# PC_PYTHON_CHECK_FUNC([LIBRARY], FUNCTION, ARGS, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
# ---------------------------------------------------------------------------------------
# Check to see if a given function call, optionally from a module, can
# be successfully called
AC_DEFUN([PC_PYTHON_CHECK_FUNC],
[AC_REQUIRE([AC_PROG_PYTHON])[]dnl
m4_define([pc_python_safe_mod], m4_bpatsubsts($1, [\.], [_]))
AC_CACHE_CHECK([for Python m4_ifnblank($1, '$1.$2()', '$2()') function],
[[pc_cv_python_func_]pc_python_safe_mod[_$2]],
[AC_LANG_PUSH(Python)[]dnl
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([dnl
import sys
m4_ifnblank([$1], [dnl
try:
import $1
except:
sys.exit(1)
], [])],
[
m4_ifnblank([$1], [
try:
$1.$2($3)], [
try:
$2($3)])
except:
sys.exit(1)
else:
sys.exit(0)
])],
[[pc_cv_python_func_]pc_python_safe_mod[_$2]="yes"],
[[pc_cv_python_func_]pc_python_safe_mod[_$2]="no"])
AC_LANG_POP(Python)[]dnl
])
AS_IF([test "$[pc_cv_python_func_]pc_python_safe_mod[_$2]" = "no"], [$5], [$4])
])# PC_PYTHON_CHECK_FUNC
_______________________________________________
Autoconf mailing list
Autoconf@xxxxxxx
https://lists.gnu.org/mailman/listinfo/autoconf
