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configure.ac
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dnl ***************************************************
dnl * Please run autoreconf -if to test your changes! *
dnl ***************************************************
dnl
dnl Python's configure script requires autoconf 2.71, autoconf-archive,
dnl pkgconf's m4 macros.
dnl
dnl It is recommended to use a cpython_autoconf container to regenerate the
dnl configure script:
dnl
dnl podman run --rm --pull=always -v $(pwd):/src:Z quay.io/tiran/cpython_autoconf:271
dnl docker run --rm --pull=always -v $(pwd):/src quay.io/tiran/cpython_autoconf:271
dnl
# Set VERSION so we only need to edit in one place (i.e., here)
m4_define([PYTHON_VERSION], [3.13])
AC_PREREQ([2.71])
AC_INIT([python],[PYTHON_VERSION],[https://github.com/python/cpython/issues/])
m4_ifdef(
[AX_C_FLOAT_WORDS_BIGENDIAN],
[],
[AC_MSG_ERROR([Please install autoconf-archive package and re-run autoreconf])]
)dnl
m4_ifdef(
[PKG_PROG_PKG_CONFIG],
[],
[AC_MSG_ERROR([Please install pkgconf's m4 macro package and re-run autoreconf])]
)dnl
dnl Helpers for saving and restoring environment variables:
dnl - _SAVE_VAR([VAR]) Helper for SAVE_ENV; stores VAR as save_VAR
dnl - _RESTORE_VAR([VAR]) Helper for RESTORE_ENV; restores VAR from save_VAR
dnl - SAVE_ENV Saves CFLAGS, LDFLAGS, LIBS, and CPPFLAGS
dnl - RESTORE_ENV Restores CFLAGS, LDFLAGS, LIBS, and CPPFLAGS
dnl - WITH_SAVE_ENV([SCRIPT]) Runs SCRIPT wrapped with SAVE_ENV/RESTORE_ENV
AC_DEFUN([_SAVE_VAR], [AS_VAR_COPY([save_][$1], [$1])])dnl
AC_DEFUN([_RESTORE_VAR], [AS_VAR_COPY([$1], [save_][$1])])dnl
AC_DEFUN([SAVE_ENV],
[_SAVE_VAR([CFLAGS])]
[_SAVE_VAR([CPPFLAGS])]
[_SAVE_VAR([LDFLAGS])]
[_SAVE_VAR([LIBS])]
)dnl
AC_DEFUN([RESTORE_ENV],
[_RESTORE_VAR([CFLAGS])]
[_RESTORE_VAR([CPPFLAGS])]
[_RESTORE_VAR([LDFLAGS])]
[_RESTORE_VAR([LIBS])]
)dnl
AC_DEFUN([WITH_SAVE_ENV],
[SAVE_ENV]
[$1]
[RESTORE_ENV]
)dnl
dnl PY_CHECK_FUNC(FUNCTION, [INCLUDES], [AC_DEFINE-VAR])
AC_DEFUN([PY_CHECK_FUNC],
[ AS_VAR_PUSHDEF([py_var], [ac_cv_func_$1])
AS_VAR_PUSHDEF([py_define], m4_ifblank([$3], [[HAVE_]m4_toupper($1)], [$3]))
AC_CACHE_CHECK(
[for $1],
[py_var],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([$2], [void *x=$1])],
[AS_VAR_SET([py_var], [yes])],
[AS_VAR_SET([py_var], [no])])]
)
AS_VAR_IF(
[py_var],
[yes],
[AC_DEFINE([py_define], [1], [Define if you have the '$1' function.])])
AS_VAR_POPDEF([py_var])
AS_VAR_POPDEF([py_define])
])
dnl PY_CHECK_LIB(LIBRARY, FUNCTION, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [OTHER-LIBRARIES])
dnl Like AC_CHECK_LIB() but does not modify LIBS
AC_DEFUN([PY_CHECK_LIB],
[AS_VAR_COPY([py_check_lib_save_LIBS], [LIBS])]
[AC_CHECK_LIB([$1], [$2], [$3], [$4], [$5])]
[AS_VAR_COPY([LIBS], [py_check_lib_save_LIBS])]
)
dnl PY_CHECK_EMSCRIPTEN_PORT(PKG_VAR, [EMPORT_ARGS])
dnl Use Emscripten port unless user passes ${PKG_VAR}_CFLAGS
dnl or ${PKG_VAR}_LIBS to configure.
AC_DEFUN([PY_CHECK_EMSCRIPTEN_PORT], [
AS_VAR_PUSHDEF([py_cflags], [$1_CFLAGS])
AS_VAR_PUSHDEF([py_libs], [$1_LIBS])
AS_IF([test "$ac_sys_system" = "Emscripten" -a -z "$py_cflags" -a -z "$py_libs"], [
py_cflags="$2"
py_libs="$2"
])
AS_VAR_POPDEF([py_cflags])
AS_VAR_POPDEF([py_libs])
])
AC_SUBST([BASECPPFLAGS])
if test "$srcdir" != . -a "$srcdir" != "$(pwd)"; then
# If we're building out-of-tree, we need to make sure the following
# resources get picked up before their $srcdir counterparts.
# Objects/ -> typeslots.inc
# Include/ -> Python.h
# (A side effect of this is that these resources will automatically be
# regenerated when building out-of-tree, regardless of whether or not
# the $srcdir counterpart is up-to-date. This is an acceptable trade
# off.)
BASECPPFLAGS="-IObjects -IInclude -IPython"
else
BASECPPFLAGS=""
fi
AC_SUBST([GITVERSION])
AC_SUBST([GITTAG])
AC_SUBST([GITBRANCH])
if test -e $srcdir/.git
then
AC_CHECK_PROG([HAS_GIT], [git], [found], [not-found])
else
HAS_GIT=no-repository
fi
if test $HAS_GIT = found
then
GITVERSION="git --git-dir \$(srcdir)/.git rev-parse --short HEAD"
GITTAG="git --git-dir \$(srcdir)/.git describe --all --always --dirty"
GITBRANCH="git --git-dir \$(srcdir)/.git name-rev --name-only HEAD"
else
GITVERSION=""
GITTAG=""
GITBRANCH=""
fi
AC_CONFIG_SRCDIR([Include/object.h])
AC_CONFIG_HEADERS([pyconfig.h])
AC_CANONICAL_HOST
AC_SUBST([build])
AC_SUBST([host])
AS_VAR_IF([cross_compiling], [maybe],
[AC_MSG_ERROR([Cross compiling required --host=HOST-TUPLE and --build=ARCH])]
)
# pybuilddir.txt will be created by --generate-posix-vars in the Makefile
rm -f pybuilddir.txt
AC_ARG_WITH([build-python],
[AS_HELP_STRING([--with-build-python=python]PYTHON_VERSION,
[path to build python binary for cross compiling (default: _bootstrap_python or python]PYTHON_VERSION[)])],
[
AC_MSG_CHECKING([for --with-build-python])
AS_VAR_IF([with_build_python], [yes], [with_build_python=python$PACKAGE_VERSION])
AS_VAR_IF([with_build_python], [no], [AC_MSG_ERROR([invalid --with-build-python option: expected path or "yes", not "no"])])
if ! $(command -v "$with_build_python" >/dev/null 2>&1); then
AC_MSG_ERROR([invalid or missing build python binary "$with_build_python"])
fi
build_python_ver=$($with_build_python -c "import sys; print(f'{sys.version_info.major}.{sys.version_info.minor}')")
if test "$build_python_ver" != "$PACKAGE_VERSION"; then
AC_MSG_ERROR(["$with_build_python" has incompatible version $build_python_ver (expected: $PACKAGE_VERSION)])
fi
dnl Build Python interpreter is used for regeneration and freezing.
ac_cv_prog_PYTHON_FOR_REGEN=$with_build_python
PYTHON_FOR_FREEZE="$with_build_python"
PYTHON_FOR_BUILD='_PYTHON_PROJECT_BASE=$(abs_builddir) _PYTHON_HOST_PLATFORM=$(_PYTHON_HOST_PLATFORM) PYTHONPATH=$(shell test -f pybuilddir.txt && echo $(abs_builddir)/`cat pybuilddir.txt`:)$(srcdir)/Lib _PYTHON_SYSCONFIGDATA_NAME=_sysconfigdata_$(ABIFLAGS)_$(MACHDEP)_$(MULTIARCH) '$with_build_python
AC_MSG_RESULT([$with_build_python])
], [
AS_VAR_IF([cross_compiling], [yes],
[AC_MSG_ERROR([Cross compiling requires --with-build-python])]
)
PYTHON_FOR_BUILD='./$(BUILDPYTHON) -E'
PYTHON_FOR_FREEZE="./_bootstrap_python"
]
)
AC_SUBST([PYTHON_FOR_BUILD])
AC_MSG_CHECKING([for Python interpreter freezing])
AC_MSG_RESULT([$PYTHON_FOR_FREEZE])
AC_SUBST([PYTHON_FOR_FREEZE])
AS_VAR_IF([cross_compiling], [yes],
[
dnl external build Python, freezing depends on Programs/_freeze_module.py
FREEZE_MODULE_BOOTSTRAP='$(PYTHON_FOR_FREEZE) $(srcdir)/Programs/_freeze_module.py'
FREEZE_MODULE_BOOTSTRAP_DEPS='$(srcdir)/Programs/_freeze_module.py'
FREEZE_MODULE='$(FREEZE_MODULE_BOOTSTRAP)'
FREEZE_MODULE_DEPS='$(FREEZE_MODULE_BOOTSTRAP_DEPS)'
PYTHON_FOR_BUILD_DEPS=''
],
[
dnl internal build tools also depend on Programs/_freeze_module and _bootstrap_python.
FREEZE_MODULE_BOOTSTRAP='./Programs/_freeze_module'
FREEZE_MODULE_BOOTSTRAP_DEPS="Programs/_freeze_module"
FREEZE_MODULE='$(PYTHON_FOR_FREEZE) $(srcdir)/Programs/_freeze_module.py'
FREEZE_MODULE_DEPS="_bootstrap_python \$(srcdir)/Programs/_freeze_module.py"
PYTHON_FOR_BUILD_DEPS='$(BUILDPYTHON)'
]
)
AC_SUBST([FREEZE_MODULE_BOOTSTRAP])
AC_SUBST([FREEZE_MODULE_BOOTSTRAP_DEPS])
AC_SUBST([FREEZE_MODULE])
AC_SUBST([FREEZE_MODULE_DEPS])
AC_SUBST([PYTHON_FOR_BUILD_DEPS])
AC_CHECK_PROGS([PYTHON_FOR_REGEN],
[python$PACKAGE_VERSION python3.13 python3.12 python3.11 python3.10 python3 python],
[python3])
AC_SUBST([PYTHON_FOR_REGEN])
AC_MSG_CHECKING([Python for regen version])
if command -v "$PYTHON_FOR_REGEN" >/dev/null 2>&1; then
AC_MSG_RESULT([$($PYTHON_FOR_REGEN -V 2>/dev/null)])
else
AC_MSG_RESULT([missing])
fi
dnl Ensure that if prefix is specified, it does not end in a slash. If
dnl it does, we get path names containing '//' which is both ugly and
dnl can cause trouble.
dnl Last slash shouldn't be stripped if prefix=/
if test "$prefix" != "/"; then
prefix=`echo "$prefix" | sed -e 's/\/$//g'`
fi
dnl This is for stuff that absolutely must end up in pyconfig.h.
dnl Please use pyport.h instead, if possible.
AH_TOP([
#ifndef Py_PYCONFIG_H
#define Py_PYCONFIG_H
])
AH_BOTTOM([
/* Define the macros needed if on a UnixWare 7.x system. */
#if defined(__USLC__) && defined(__SCO_VERSION__)
#define STRICT_SYSV_CURSES /* Don't use ncurses extensions */
#endif
#endif /*Py_PYCONFIG_H*/
])
# We don't use PACKAGE_ variables, and they cause conflicts
# with other autoconf-based packages that include Python.h
grep -v 'define PACKAGE_' <confdefs.h >confdefs.h.new
rm confdefs.h
mv confdefs.h.new confdefs.h
AC_SUBST([VERSION])
VERSION=PYTHON_VERSION
# Version number of Python's own shared library file.
AC_SUBST([SOVERSION])
SOVERSION=1.0
# The later definition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
# certain features on NetBSD, so we need _NETBSD_SOURCE to re-enable
# them.
AC_DEFINE([_NETBSD_SOURCE], [1],
[Define on NetBSD to activate all library features])
# The later definition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
# certain features on FreeBSD, so we need __BSD_VISIBLE to re-enable
# them.
AC_DEFINE([__BSD_VISIBLE], [1],
[Define on FreeBSD to activate all library features])
# The later definition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
# certain features on Mac OS X, so we need _DARWIN_C_SOURCE to re-enable
# them.
AC_DEFINE([_DARWIN_C_SOURCE], [1],
[Define on Darwin to activate all library features])
define_xopen_source=yes
# Arguments passed to configure.
AC_SUBST([CONFIG_ARGS])
CONFIG_ARGS="$ac_configure_args"
dnl Allow users to disable pkg-config or require pkg-config
AC_ARG_WITH([pkg-config],
[AS_HELP_STRING([[--with-pkg-config=[yes|no|check]]],
[use pkg-config to detect build options (default is check)])],
[],
[with_pkg_config=check]
)
AS_CASE([$with_pkg_config],
[yes|check], [
if test -z "$PKG_CONFIG"; then
dnl invalidate stale config.cache values
AS_UNSET([PKG_CONFIG])
AS_UNSET([ac_cv_path_ac_pt_PKG_CONFIG])
AS_UNSET([ac_cv_prog_ac_ct_PKG_CONFIG])
fi
PKG_PROG_PKG_CONFIG
],
[no], [
PKG_CONFIG=''
dnl force AX_CHECK_OPENSSL to ignore pkg-config
ac_cv_path_ac_pt_PKG_CONFIG=''
ac_cv_prog_ac_ct_PKG_CONFIG=''
],
[AC_MSG_ERROR([invalid argument --with-pkg-config=$with_pkg_config])]
)
if test "$with_pkg_config" = yes -a -z "$PKG_CONFIG"; then
AC_MSG_ERROR([pkg-config is required])]
fi
AC_MSG_CHECKING([for --enable-universalsdk])
AC_ARG_ENABLE([universalsdk],
AS_HELP_STRING([--enable-universalsdk@<:@=SDKDIR@:>@],
[create a universal binary build.
SDKDIR specifies which macOS SDK should be used to perform the build,
see Mac/README.rst. (default is no)]),
[
case $enableval in
yes)
# Locate the best usable SDK, see Mac/README for more
# information
enableval="`/usr/bin/xcodebuild -version -sdk macosx Path 2>/dev/null`"
if ! ( echo $enableval | grep -E '\.sdk' 1>/dev/null )
then
enableval=/Developer/SDKs/MacOSX10.4u.sdk
if test ! -d "${enableval}"
then
enableval=/
fi
fi
;;
esac
case $enableval in
no)
UNIVERSALSDK=
enable_universalsdk=
;;
*)
UNIVERSALSDK=$enableval
if test ! -d "${UNIVERSALSDK}"
then
AC_MSG_ERROR([--enable-universalsdk specifies non-existing SDK: ${UNIVERSALSDK}])
fi
;;
esac
],[
UNIVERSALSDK=
enable_universalsdk=
])
if test -n "${UNIVERSALSDK}"
then
AC_MSG_RESULT([${UNIVERSALSDK}])
else
AC_MSG_RESULT([no])
fi
AC_SUBST([UNIVERSALSDK])
AC_SUBST([ARCH_RUN_32BIT])
ARCH_RUN_32BIT=""
# For backward compatibility reasons we prefer to select '32-bit' if available,
# otherwise use 'intel'
UNIVERSAL_ARCHS="32-bit"
if test "`uname -s`" = "Darwin"
then
if test -n "${UNIVERSALSDK}"
then
if test -z "`/usr/bin/file -L "${UNIVERSALSDK}/usr/lib/libSystem.dylib" | grep ppc`"
then
UNIVERSAL_ARCHS="intel"
fi
fi
fi
AC_SUBST([LIPO_32BIT_FLAGS])
AC_SUBST([LIPO_INTEL64_FLAGS])
AC_MSG_CHECKING([for --with-universal-archs])
AC_ARG_WITH([universal-archs],
AS_HELP_STRING([--with-universal-archs=ARCH],
[specify the kind of macOS universal binary that should be created.
This option is only valid when --enable-universalsdk is set; options are:
("universal2", "intel-64", "intel-32", "intel", "32-bit",
"64-bit", "3-way", or "all")
see Mac/README.rst]),
[
UNIVERSAL_ARCHS="$withval"
],
[])
if test -n "${UNIVERSALSDK}"
then
AC_MSG_RESULT([${UNIVERSAL_ARCHS}])
else
AC_MSG_RESULT([no])
fi
AC_ARG_WITH([framework-name],
AS_HELP_STRING([--with-framework-name=FRAMEWORK],
[specify the name for the python framework on macOS
only valid when --enable-framework is set. see Mac/README.rst
(default is 'Python')]),
[
PYTHONFRAMEWORK=${withval}
PYTHONFRAMEWORKDIR=${withval}.framework
PYTHONFRAMEWORKIDENTIFIER=org.python.`echo $withval | tr '[A-Z]' '[a-z]'`
],[
PYTHONFRAMEWORK=Python
PYTHONFRAMEWORKDIR=Python.framework
PYTHONFRAMEWORKIDENTIFIER=org.python.python
])
dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
AC_ARG_ENABLE([framework],
AS_HELP_STRING([--enable-framework@<:@=INSTALLDIR@:>@],
[create a Python.framework rather than a traditional Unix install.
optional INSTALLDIR specifies the installation path. see Mac/README.rst
(default is no)]),
[
case $enableval in
yes)
enableval=/Library/Frameworks
esac
case $enableval in
no)
PYTHONFRAMEWORK=
PYTHONFRAMEWORKDIR=no-framework
PYTHONFRAMEWORKPREFIX=
PYTHONFRAMEWORKINSTALLDIR=
FRAMEWORKINSTALLFIRST=
FRAMEWORKINSTALLLAST=
FRAMEWORKALTINSTALLFIRST=
FRAMEWORKALTINSTALLLAST=
FRAMEWORKPYTHONW=
if test "x${prefix}" = "xNONE"; then
FRAMEWORKUNIXTOOLSPREFIX="${ac_default_prefix}"
else
FRAMEWORKUNIXTOOLSPREFIX="${prefix}"
fi
enable_framework=
;;
*)
PYTHONFRAMEWORKPREFIX="${enableval}"
PYTHONFRAMEWORKINSTALLDIR=$PYTHONFRAMEWORKPREFIX/$PYTHONFRAMEWORKDIR
FRAMEWORKINSTALLFIRST="frameworkinstallstructure"
FRAMEWORKALTINSTALLFIRST="frameworkinstallstructure "
FRAMEWORKINSTALLLAST="frameworkinstallmaclib frameworkinstallapps frameworkinstallunixtools"
FRAMEWORKALTINSTALLLAST="frameworkinstallmaclib frameworkinstallapps frameworkaltinstallunixtools"
FRAMEWORKPYTHONW="frameworkpythonw"
FRAMEWORKINSTALLAPPSPREFIX="/Applications"
if test "x${prefix}" = "xNONE" ; then
FRAMEWORKUNIXTOOLSPREFIX="${ac_default_prefix}"
else
FRAMEWORKUNIXTOOLSPREFIX="${prefix}"
fi
case "${enableval}" in
/System*)
FRAMEWORKINSTALLAPPSPREFIX="/Applications"
if test "${prefix}" = "NONE" ; then
# See below
FRAMEWORKUNIXTOOLSPREFIX="/usr"
fi
;;
/Library*)
FRAMEWORKINSTALLAPPSPREFIX="/Applications"
;;
*/Library/Frameworks)
MDIR="`dirname "${enableval}"`"
MDIR="`dirname "${MDIR}"`"
FRAMEWORKINSTALLAPPSPREFIX="${MDIR}/Applications"
if test "${prefix}" = "NONE"; then
# User hasn't specified the
# --prefix option, but wants to install
# the framework in a non-default location,
# ensure that the compatibility links get
# installed relative to that prefix as well
# instead of in /usr/local.
FRAMEWORKUNIXTOOLSPREFIX="${MDIR}"
fi
;;
*)
FRAMEWORKINSTALLAPPSPREFIX="/Applications"
;;
esac
prefix=$PYTHONFRAMEWORKINSTALLDIR/Versions/$VERSION
# Add files for Mac specific code to the list of output
# files:
AC_CONFIG_FILES([Mac/Makefile])
AC_CONFIG_FILES([Mac/PythonLauncher/Makefile])
AC_CONFIG_FILES([Mac/Resources/framework/Info.plist])
AC_CONFIG_FILES([Mac/Resources/app/Info.plist])
esac
],[
PYTHONFRAMEWORK=
PYTHONFRAMEWORKDIR=no-framework
PYTHONFRAMEWORKPREFIX=
PYTHONFRAMEWORKINSTALLDIR=
FRAMEWORKINSTALLFIRST=
FRAMEWORKINSTALLLAST=
FRAMEWORKALTINSTALLFIRST=
FRAMEWORKALTINSTALLLAST=
FRAMEWORKPYTHONW=
if test "x${prefix}" = "xNONE" ; then
FRAMEWORKUNIXTOOLSPREFIX="${ac_default_prefix}"
else
FRAMEWORKUNIXTOOLSPREFIX="${prefix}"
fi
enable_framework=
])
AC_SUBST([PYTHONFRAMEWORK])
AC_SUBST([PYTHONFRAMEWORKIDENTIFIER])
AC_SUBST([PYTHONFRAMEWORKDIR])
AC_SUBST([PYTHONFRAMEWORKPREFIX])
AC_SUBST([PYTHONFRAMEWORKINSTALLDIR])
AC_SUBST([FRAMEWORKINSTALLFIRST])
AC_SUBST([FRAMEWORKINSTALLLAST])
AC_SUBST([FRAMEWORKALTINSTALLFIRST])
AC_SUBST([FRAMEWORKALTINSTALLLAST])
AC_SUBST([FRAMEWORKPYTHONW])
AC_SUBST([FRAMEWORKUNIXTOOLSPREFIX])
AC_SUBST([FRAMEWORKINSTALLAPPSPREFIX])
AC_DEFINE_UNQUOTED([_PYTHONFRAMEWORK], ["${PYTHONFRAMEWORK}"],
[framework name])
# Set name for machine-dependent library files
AC_ARG_VAR([MACHDEP], [name for machine-dependent library files])
AC_MSG_CHECKING([MACHDEP])
if test -z "$MACHDEP"
then
# avoid using uname for cross builds
if test "$cross_compiling" = yes; then
# ac_sys_system and ac_sys_release are used for setting
# a lot of different things including 'define_xopen_source'
# in the case statement below.
case "$host" in
*-*-linux-android*)
ac_sys_system=Linux-android
;;
*-*-linux*)
ac_sys_system=Linux
;;
*-*-cygwin*)
ac_sys_system=Cygwin
;;
*-*-vxworks*)
ac_sys_system=VxWorks
;;
*-*-emscripten)
ac_sys_system=Emscripten
;;
*-*-wasi)
ac_sys_system=WASI
;;
*)
# for now, limit cross builds to known configurations
MACHDEP="unknown"
AC_MSG_ERROR([cross build not supported for $host])
esac
ac_sys_release=
else
ac_sys_system=`uname -s`
if test "$ac_sys_system" = "AIX" \
-o "$ac_sys_system" = "UnixWare" -o "$ac_sys_system" = "OpenUNIX"; then
ac_sys_release=`uname -v`
else
ac_sys_release=`uname -r`
fi
fi
ac_md_system=`echo $ac_sys_system |
tr -d '[/ ]' | tr '[[A-Z]]' '[[a-z]]'`
ac_md_release=`echo $ac_sys_release |
tr -d '[/ ]' | sed 's/^[[A-Z]]\.//' | sed 's/\..*//'`
MACHDEP="$ac_md_system$ac_md_release"
case $MACHDEP in
aix*) MACHDEP="aix";;
linux*) MACHDEP="linux";;
cygwin*) MACHDEP="cygwin";;
darwin*) MACHDEP="darwin";;
'') MACHDEP="unknown";;
esac
fi
AC_MSG_RESULT(["$MACHDEP"])
AC_SUBST([_PYTHON_HOST_PLATFORM])
if test "$cross_compiling" = yes; then
case "$host" in
*-*-linux*)
case "$host_cpu" in
arm*)
_host_cpu=arm
;;
*)
_host_cpu=$host_cpu
esac
;;
*-*-cygwin*)
_host_cpu=
;;
*-*-vxworks*)
_host_cpu=$host_cpu
;;
wasm32-*-* | wasm64-*-*)
_host_cpu=$host_cpu
;;
*)
# for now, limit cross builds to known configurations
MACHDEP="unknown"
AC_MSG_ERROR([cross build not supported for $host])
esac
_PYTHON_HOST_PLATFORM="$MACHDEP${_host_cpu:+-$_host_cpu}"
fi
# Some systems cannot stand _XOPEN_SOURCE being defined at all; they
# disable features if it is defined, without any means to access these
# features as extensions. For these systems, we skip the definition of
# _XOPEN_SOURCE. Before adding a system to the list to gain access to
# some feature, make sure there is no alternative way to access this
# feature. Also, when using wildcards, make sure you have verified the
# need for not defining _XOPEN_SOURCE on all systems matching the
# wildcard, and that the wildcard does not include future systems
# (which may remove their limitations).
dnl quadrigraphs "@<:@" and "@:>@" produce "[" and "]" in the output
case $ac_sys_system/$ac_sys_release in
# On OpenBSD, select(2) is not available if _XOPEN_SOURCE is defined,
# even though select is a POSIX function. Reported by J. Ribbens.
# Reconfirmed for OpenBSD 3.3 by Zachary Hamm, for 3.4 by Jason Ish.
# In addition, Stefan Krah confirms that issue #1244610 exists through
# OpenBSD 4.6, but is fixed in 4.7.
OpenBSD/2.* | OpenBSD/3.* | OpenBSD/4.@<:@0123456@:>@)
define_xopen_source=no
# OpenBSD undoes our definition of __BSD_VISIBLE if _XOPEN_SOURCE is
# also defined. This can be overridden by defining _BSD_SOURCE
# As this has a different meaning on Linux, only define it on OpenBSD
AC_DEFINE([_BSD_SOURCE], [1],
[Define on OpenBSD to activate all library features])
;;
OpenBSD/*)
# OpenBSD undoes our definition of __BSD_VISIBLE if _XOPEN_SOURCE is
# also defined. This can be overridden by defining _BSD_SOURCE
# As this has a different meaning on Linux, only define it on OpenBSD
AC_DEFINE([_BSD_SOURCE], [1],
[Define on OpenBSD to activate all library features])
;;
# Defining _XOPEN_SOURCE on NetBSD version prior to the introduction of
# _NETBSD_SOURCE disables certain features (eg. setgroups). Reported by
# Marc Recht
NetBSD/1.5 | NetBSD/1.5.* | NetBSD/1.6 | NetBSD/1.6.* | NetBSD/1.6@<:@A-S@:>@)
define_xopen_source=no;;
# From the perspective of Solaris, _XOPEN_SOURCE is not so much a
# request to enable features supported by the standard as a request
# to disable features not supported by the standard. The best way
# for Python to use Solaris is simply to leave _XOPEN_SOURCE out
# entirely and define __EXTENSIONS__ instead.
SunOS/*)
define_xopen_source=no;;
# On UnixWare 7, u_long is never defined with _XOPEN_SOURCE,
# but used in /usr/include/netinet/tcp.h. Reported by Tim Rice.
# Reconfirmed for 7.1.4 by Martin v. Loewis.
OpenUNIX/8.0.0| UnixWare/7.1.@<:@0-4@:>@)
define_xopen_source=no;;
# On OpenServer 5, u_short is never defined with _XOPEN_SOURCE,
# but used in struct sockaddr.sa_family. Reported by Tim Rice.
SCO_SV/3.2)
define_xopen_source=no;;
# On MacOS X 10.2, a bug in ncurses.h means that it craps out if
# _XOPEN_EXTENDED_SOURCE is defined. Apparently, this is fixed in 10.3, which
# identifies itself as Darwin/7.*
# On Mac OS X 10.4, defining _POSIX_C_SOURCE or _XOPEN_SOURCE
# disables platform specific features beyond repair.
# On Mac OS X 10.3, defining _POSIX_C_SOURCE or _XOPEN_SOURCE
# has no effect, don't bother defining them
Darwin/@<:@6789@:>@.*)
define_xopen_source=no;;
Darwin/@<:@[12]@:>@@<:@0-9@:>@.*)
define_xopen_source=no;;
# On QNX 6.3.2, defining _XOPEN_SOURCE prevents netdb.h from
# defining NI_NUMERICHOST.
QNX/6.3.2)
define_xopen_source=no
;;
# On VxWorks, defining _XOPEN_SOURCE causes compile failures
# in network headers still using system V types.
VxWorks/*)
define_xopen_source=no
;;
# On HP-UX, defining _XOPEN_SOURCE to 600 or greater hides
# chroot() and other functions
hp*|HP*)
define_xopen_source=no
;;
esac
if test $define_xopen_source = yes
then
# X/Open 7, incorporating POSIX.1-2008
AC_DEFINE([_XOPEN_SOURCE], [700],
[Define to the level of X/Open that your system supports])
# On Tru64 Unix 4.0F, defining _XOPEN_SOURCE also requires
# definition of _XOPEN_SOURCE_EXTENDED and _POSIX_C_SOURCE, or else
# several APIs are not declared. Since this is also needed in some
# cases for HP-UX, we define it globally.
AC_DEFINE([_XOPEN_SOURCE_EXTENDED], [1],
[Define to activate Unix95-and-earlier features])
AC_DEFINE([_POSIX_C_SOURCE], [200809L],
[Define to activate features from IEEE Stds 1003.1-2008])
fi
# On HP-UX mbstate_t requires _INCLUDE__STDC_A1_SOURCE
case $ac_sys_system in
hp*|HP*)
define_stdc_a1=yes;;
*)
define_stdc_a1=no;;
esac
if test $define_stdc_a1 = yes
then
AC_DEFINE([_INCLUDE__STDC_A1_SOURCE], [1],
[Define to include mbstate_t for mbrtowc])
fi
# Record the configure-time value of MACOSX_DEPLOYMENT_TARGET,
# it may influence the way we can build extensions, so distutils
# needs to check it
AC_SUBST([CONFIGURE_MACOSX_DEPLOYMENT_TARGET])
AC_SUBST([EXPORT_MACOSX_DEPLOYMENT_TARGET])
CONFIGURE_MACOSX_DEPLOYMENT_TARGET=
EXPORT_MACOSX_DEPLOYMENT_TARGET='#'
# checks for alternative programs
# compiler flags are generated in two sets, BASECFLAGS and OPT. OPT is just
# for debug/optimization stuff. BASECFLAGS is for flags that are required
# just to get things to compile and link. Users are free to override OPT
# when running configure or make. The build should not break if they do.
# BASECFLAGS should generally not be messed with, however.
# If the user switches compilers, we can't believe the cache
if test ! -z "$ac_cv_prog_CC" -a ! -z "$CC" -a "$CC" != "$ac_cv_prog_CC"
then
AC_MSG_ERROR([cached CC is different -- throw away $cache_file
(it is also a good idea to do 'make clean' before compiling)])
fi
# Don't let AC_PROG_CC set the default CFLAGS. It normally sets -g -O2
# when the compiler supports them, but we don't always want -O2, and
# we set -g later.
if test -z "$CFLAGS"; then
CFLAGS=
fi
dnl Emscripten SDK and WASI SDK default to wasm32.
dnl On Emscripten use MEMORY64 setting to build target wasm64-emscripten.
dnl for wasm64.
AS_CASE([$host],
[wasm64-*-emscripten], [
AS_VAR_APPEND([CFLAGS], [" -sMEMORY64=1"])
AS_VAR_APPEND([LDFLAGS], [" -sMEMORY64=1"])
],
)
if test "$ac_sys_system" = "Darwin"
then
dnl look for SDKROOT
AC_CHECK_PROG([HAS_XCRUN], [xcrun], [yes], [missing])
AC_MSG_CHECKING([macOS SDKROOT])
if test -z "$SDKROOT"; then
dnl SDKROOT not set
if test "$HAS_XCRUN" = "yes"; then
dnl detect with Xcode
SDKROOT=$(xcrun --show-sdk-path)
else
dnl default to root
SDKROOT="/"
fi
fi
AC_MSG_RESULT([$SDKROOT])
# Compiler selection on MacOSX is more complicated than
# AC_PROG_CC can handle, see Mac/README for more
# information
if test -z "${CC}"
then
found_gcc=
found_clang=
as_save_IFS=$IFS; IFS=:
for as_dir in $PATH
do
IFS=$as_save_IFS
if test -x "${as_dir}/gcc"; then
if test -z "${found_gcc}"; then
found_gcc="${as_dir}/gcc"
fi
fi
if test -x "${as_dir}/clang"; then
if test -z "${found_clang}"; then
found_clang="${as_dir}/clang"
fi
fi
done
IFS=$as_save_IFS
if test -n "$found_gcc" -a -n "$found_clang"
then
if test -n "`"$found_gcc" --version | grep llvm-gcc`"
then
AC_MSG_NOTICE([Detected llvm-gcc, falling back to clang])
CC="$found_clang"
CXX="$found_clang++"
fi
elif test -z "$found_gcc" -a -n "$found_clang"
then
AC_MSG_NOTICE([No GCC found, use CLANG])
CC="$found_clang"
CXX="$found_clang++"
elif test -z "$found_gcc" -a -z "$found_clang"
then
found_clang=`/usr/bin/xcrun -find clang 2>/dev/null`
if test -n "${found_clang}"
then
AC_MSG_NOTICE([Using clang from Xcode.app])
CC="${found_clang}"
CXX="`/usr/bin/xcrun -find clang++`"
# else: use default behaviour
fi
fi
fi
fi
AC_PROG_CC
AC_PROG_CPP
AC_PROG_GREP
AC_PROG_SED
AC_PROG_EGREP
dnl detect compiler name
dnl check for xlc before clang, newer xlc's can use clang as frontend.
dnl check for GCC last, other compilers set __GNUC__, too.
dnl msvc is listed for completeness.
AC_CACHE_CHECK([for CC compiler name], [ac_cv_cc_name], [
cat > conftest.c <<EOF
#if defined(__INTEL_COMPILER) || defined(__ICC)
icc
#elif defined(__ibmxl__) || defined(__xlc__) || defined(__xlC__)
xlc
#elif defined(_MSC_VER)
msvc
#elif defined(__clang__)
clang
#elif defined(__GNUC__)
gcc
#else
# error unknown compiler
#endif
EOF
if $CPP $CPPFLAGS conftest.c >conftest.out 2>/dev/null; then
ac_cv_cc_name=`grep -v '^#' conftest.out | grep -v '^ *$' | tr -d ' '`
else
ac_cv_cc_name="unknown"
fi
rm -f conftest.c conftest.out
])
# checks for UNIX variants that set C preprocessor variables
# may set _GNU_SOURCE, __EXTENSIONS__, _POSIX_PTHREAD_SEMANTICS,
# _POSIX_SOURCE, _POSIX_1_SOURCE, and more
AC_USE_SYSTEM_EXTENSIONS
AC_SUBST([CXX])
preset_cxx="$CXX"
if test -z "$CXX"
then
case "$CC" in
gcc) AC_PATH_TOOL([CXX], [g++], [g++], [notfound]) ;;
cc) AC_PATH_TOOL([CXX], [c++], [c++], [notfound]) ;;
clang|*/clang) AC_PATH_TOOL([CXX], [clang++], [clang++], [notfound]) ;;
icc|*/icc) AC_PATH_TOOL([CXX], [icpc], [icpc], [notfound]) ;;
esac
if test "$CXX" = "notfound"
then
CXX=""
fi
fi
if test -z "$CXX"
then
AC_CHECK_TOOLS([CXX], [$CCC c++ g++ gcc CC cxx cc++ cl], [notfound])
if test "$CXX" = "notfound"
then
CXX=""
fi
fi
if test "$preset_cxx" != "$CXX"
then
AC_MSG_NOTICE([
By default, distutils will build C++ extension modules with "$CXX".
If this is not intended, then set CXX on the configure command line.
])
fi
AC_MSG_CHECKING([for the platform triplet based on compiler characteristics])
if $CPP $CPPFLAGS $srcdir/Misc/platform_triplet.c >conftest.out 2>/dev/null; then
PLATFORM_TRIPLET=`grep '^PLATFORM_TRIPLET=' conftest.out | tr -d ' '`
PLATFORM_TRIPLET="${PLATFORM_TRIPLET@%:@PLATFORM_TRIPLET=}"
AC_MSG_RESULT([$PLATFORM_TRIPLET])
else
AC_MSG_RESULT([none])
fi
rm -f conftest.out
AC_MSG_CHECKING([for multiarch])
AS_CASE([$ac_sys_system],
[Darwin*], [MULTIARCH=""],
[FreeBSD*], [MULTIARCH=""],
[MULTIARCH=$($CC --print-multiarch 2>/dev/null)]
)
AC_SUBST([MULTIARCH])
AC_MSG_RESULT([$MULTIARCH])
if test x$PLATFORM_TRIPLET != x && test x$MULTIARCH != x; then
if test x$PLATFORM_TRIPLET != x$MULTIARCH; then
AC_MSG_ERROR([internal configure error for the platform triplet, please file a bug report])
fi
elif test x$PLATFORM_TRIPLET != x && test x$MULTIARCH = x; then
MULTIARCH=$PLATFORM_TRIPLET
fi
AC_SUBST([PLATFORM_TRIPLET])
if test x$MULTIARCH != x; then
MULTIARCH_CPPFLAGS="-DMULTIARCH=\\\"$MULTIARCH\\\""
fi
AC_SUBST([MULTIARCH_CPPFLAGS])
dnl Support tiers according to https://peps.python.org/pep-0011/
dnl
dnl NOTE: Windows support tiers are defined in PC/pyconfig.h.
dnl
AC_MSG_CHECKING([for PEP 11 support tier])
AS_CASE([$host/$ac_cv_cc_name],
[x86_64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=1], dnl Linux on AMD64, any vendor, glibc, gcc
[x86_64-apple-darwin*/clang], [PY_SUPPORT_TIER=1], dnl macOS on Intel, any version
[i686-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=1], dnl 32bit Windows on Intel, MSVC
[x86_64-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=1], dnl 64bit Windows on AMD64, MSVC
[aarch64-apple-darwin*/clang], [PY_SUPPORT_TIER=2], dnl macOS on M1, any version
[aarch64-*-linux-gnu/gcc], [PY_SUPPORT_TIER=2], dnl Linux ARM64, glibc, gcc+clang
[aarch64-*-linux-gnu/clang], [PY_SUPPORT_TIER=2],
[powerpc64le-*-linux-gnu/gcc], [PY_SUPPORT_TIER=2], dnl Linux on PPC64 little endian, glibc, gcc
[x86_64-*-linux-gnu/clang], [PY_SUPPORT_TIER=2], dnl Linux on AMD64, any vendor, glibc, clang
[aarch64-pc-windows-msvc/msvc], [PY_SUPPORT_TIER=3], dnl Windows ARM64, MSVC
[armv7l-*-linux-gnueabihf/gcc], [PY_SUPPORT_TIER=3], dnl ARMv7 LE with hardware floats, any vendor, glibc, gcc
[powerpc64le-*-linux-gnu/clang], [PY_SUPPORT_TIER=3], dnl Linux on PPC64 little endian, glibc, clang
[s390x-*-linux-gnu/gcc], [PY_SUPPORT_TIER=3], dnl Linux on 64bit s390x (big endian), glibc, gcc
[wasm32-unknown-emscripten/clang], [PY_SUPPORT_TIER=3], dnl WebAssembly Emscripten
[wasm32-unknown-wasi/clang], [PY_SUPPORT_TIER=3], dnl WebAssembly System Interface
[x86_64-*-freebsd*/clang], [PY_SUPPORT_TIER=3], dnl FreeBSD on AMD64
[PY_SUPPORT_TIER=0]
)
AS_CASE([$PY_SUPPORT_TIER],
[1], [AC_MSG_RESULT([$host/$ac_cv_cc_name has tier 1 (supported)])],
[2], [AC_MSG_RESULT([$host/$ac_cv_cc_name has tier 2 (supported)])],
[3], [AC_MSG_RESULT([$host/$ac_cv_cc_name has tier 3 (partially supported)])],
[AC_MSG_WARN([$host/$ac_cv_cc_name is not supported])]
)
AC_DEFINE_UNQUOTED([PY_SUPPORT_TIER], [$PY_SUPPORT_TIER], [PEP 11 Support tier (1, 2, 3 or 0 for unsupported)])
AC_CACHE_CHECK([for -Wl,--no-as-needed], [ac_cv_wl_no_as_needed], [
save_LDFLAGS="$LDFLAGS"
AS_VAR_APPEND([LDFLAGS], [" -Wl,--no-as-needed"])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[NO_AS_NEEDED="-Wl,--no-as-needed"
ac_cv_wl_no_as_needed=yes],
[NO_AS_NEEDED=""
ac_cv_wl_no_as_needed=no])
LDFLAGS="$save_LDFLAGS"