dnl ***********************************************

dnl * Please run autoreconf to test your changes! *

dnl ***********************************************

# Set VERSION so we only need to edit in one place (i.e., here)

m4_define(PYTHON_VERSION, 3.7)

AC_PREREQ(2.65)

AC_INIT(python, PYTHON_VERSION, https://github.com/python/cpython/issues/)

AC_CONFIG_MACRO_DIR(m4)

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-ast.h, graminit.h

# Python/ -> importlib.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_HEADER(pyconfig.h)

AC_CANONICAL_HOST

AC_SUBST(build)

AC_SUBST(host)

# pybuilddir.txt will be created by --generate-posix-vars in the Makefile

rm -f pybuilddir.txt

AC_CHECK_PROGS(PYTHON_FOR_REGEN, python$PACKAGE_VERSION python3 python, python3)

AC_SUBST(PYTHON_FOR_REGEN)

if test "$cross_compiling" = yes; then

AC_MSG_CHECKING([for python interpreter for cross build])

if test -z "$PYTHON_FOR_BUILD"; then

for interp in python$PACKAGE_VERSION python3 python; do

which $interp >/dev/null 2>&1 || continue

if $interp -c "import sys;sys.exit(not '.'.join(str(n) for n in sys.version_info@<:@:2@:>@) == '$PACKAGE_VERSION')"; then

break

fi

interp=

done

if test x$interp = x; then

AC_MSG_ERROR([python$PACKAGE_VERSION interpreter not found])

fi

AC_MSG_RESULT($interp)

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)_$(MULTIARCH) '$interp

fi

elif test "$cross_compiling" = maybe; then

AC_MSG_ERROR([Cross compiling required --host=HOST-TUPLE and --build=ARCH])

else

PYTHON_FOR_BUILD='./$(BUILDPYTHON) -E'

fi

AC_SUBST(PYTHON_FOR_BUILD)

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 defininition of _XOPEN_SOURCE disables certain features

# on Linux, so we need _GNU_SOURCE to re-enable them (makedev, tm_zone).

AC_DEFINE(_GNU_SOURCE, 1, [Define on Linux to activate all library features])

# The later defininition 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 defininition 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 defininition 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"

AC_MSG_CHECKING([for --enable-universalsdk])

AC_ARG_ENABLE(universalsdk,

AS_HELP_STRING([--enable-universalsdk@<:@=SDKDIR@:>@], [Build fat binary against Mac OS X SDK]),

[

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_MSG_CHECKING(for --with-universal-archs)

AC_ARG_WITH(universal-archs,

AS_HELP_STRING([--with-universal-archs=ARCH], [select architectures for universal build ("32-bit", "64-bit", "3-way", "intel", "intel-32", "intel-64", or "all")]),

[

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 an alternate name of the framework built with --enable-framework]),

[

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@:>@], [Build (MacOSX|Darwin) framework]),

[

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])

##AC_ARG_WITH(dyld,

## AS_HELP_STRING([--with-dyld],

## [Use (OpenStep|Rhapsody) dynamic linker]))

##

# 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

;;

*)

# 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

linux*) MACHDEP="linux";;

cygwin*) MACHDEP="cygwin";;

darwin*) MACHDEP="darwin";;

'') MACHDEP="unknown";;

esac

fi

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=

;;

*)

# 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 AIX 4 and 5.1, mbstate_t is defined only when _XOPEN_SOURCE == 500 but

# used in wcsnrtombs() and mbsnrtowcs() even if _XOPEN_SOURCE is not defined

# or has another value. By not (re)defining it, the defaults come in place.

AIX/4)

define_xopen_source=no;;

AIX/5)

if test `uname -r` -eq 1; then

define_xopen_source=no

fi

;;

# On QNX 6.3.2, defining _XOPEN_SOURCE prevents netdb.h from

# defining NI_NUMERICHOST.

QNX/6.3.2)

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.

# XXX shouldn't some/most/all of this code be merged with the stuff later

# on that fiddles with OPT and BASECFLAGS?

AC_MSG_CHECKING(for --without-gcc)

AC_ARG_WITH(gcc,

AS_HELP_STRING([--without-gcc], [never use gcc]),

[

case $withval in

no) CC=${CC:-cc}

without_gcc=yes;;

yes) CC=gcc

without_gcc=no;;

*) CC=$withval

without_gcc=$withval;;

esac], [

case $ac_sys_system in

AIX*) CC=${CC:-xlc_r}

without_gcc=;;

*) without_gcc=no;;

esac])

AC_MSG_RESULT($without_gcc)

AC_MSG_CHECKING(for --with-icc)

AC_ARG_WITH(icc,

AS_HELP_STRING([--with-icc], [build with icc]),

[

case $withval in

no) CC=${CC:-cc}

with_icc=no;;

yes) CC=icc

CXX=icpc

with_icc=yes;;

*) CC=$withval

with_icc=$withval;;

esac], [

with_icc=no])

AC_MSG_RESULT($with_icc)

# 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

if test "$ac_sys_system" = "Darwin"

then

# 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_SUBST(CXX)

AC_SUBST(MAINCC)

AC_MSG_CHECKING(for --with-cxx-main=<compiler>)

AC_ARG_WITH(cxx_main,

AS_HELP_STRING([--with-cxx-main=<compiler>],

[compile main() and link python executable with C++ compiler]),

[

case $withval in

no) with_cxx_main=no

MAINCC='$(CC)';;

yes) with_cxx_main=yes

MAINCC='$(CXX)';;

*) with_cxx_main=yes

MAINCC=$withval

if test -z "$CXX"

then

CXX=$withval

fi;;

esac], [

with_cxx_main=no

MAINCC='$(CC)'

])

AC_MSG_RESULT($with_cxx_main)

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])

cat >> conftest.c <<EOF

#undef bfin

#undef cris

#undef fr30

#undef linux

#undef hppa

#undef hpux

#undef i386

#undef mips

#undef powerpc

#undef sparc

#undef unix

#if defined(__ANDROID__)

# Android is not a multiarch system.

#elif defined(__linux__)

# if defined(__x86_64__) && defined(__LP64__)

x86_64-linux-gnu

# elif defined(__x86_64__) && defined(__ILP32__)

x86_64-linux-gnux32

# elif defined(__i386__)

i386-linux-gnu

# elif defined(__aarch64__) && defined(__AARCH64EL__)

# if defined(__ILP32__)

aarch64_ilp32-linux-gnu

# else

aarch64-linux-gnu

# endif

# elif defined(__aarch64__) && defined(__AARCH64EB__)

# if defined(__ILP32__)

aarch64_be_ilp32-linux-gnu

# else

aarch64_be-linux-gnu

# endif

# elif defined(__alpha__)

alpha-linux-gnu

# elif defined(__ARM_EABI__) && defined(__ARM_PCS_VFP)

# if defined(__ARMEL__)

arm-linux-gnueabihf

# else

armeb-linux-gnueabihf

# endif

# elif defined(__ARM_EABI__) && !defined(__ARM_PCS_VFP)

# if defined(__ARMEL__)

arm-linux-gnueabi

# else

armeb-linux-gnueabi

# endif

# elif defined(__hppa__)

hppa-linux-gnu

# elif defined(__ia64__)

ia64-linux-gnu

# elif defined(__m68k__) && !defined(__mcoldfire__)

m68k-linux-gnu

# elif defined(__mips_hard_float) && defined(__mips_isa_rev) && (__mips_isa_rev >=6) && defined(_MIPSEL)

# if _MIPS_SIM == _ABIO32

mipsisa32r6el-linux-gnu

# elif _MIPS_SIM == _ABIN32

mipsisa64r6el-linux-gnuabin32

# elif _MIPS_SIM == _ABI64

mipsisa64r6el-linux-gnuabi64

# else

# error unknown platform triplet

# endif

# elif defined(__mips_hard_float) && defined(__mips_isa_rev) && (__mips_isa_rev >=6)

# if _MIPS_SIM == _ABIO32

mipsisa32r6-linux-gnu

# elif _MIPS_SIM == _ABIN32

mipsisa64r6-linux-gnuabin32

# elif _MIPS_SIM == _ABI64

mipsisa64r6-linux-gnuabi64

# else

# error unknown platform triplet

# endif

# elif defined(__mips_hard_float) && defined(_MIPSEL)

# if _MIPS_SIM == _ABIO32

mipsel-linux-gnu

# elif _MIPS_SIM == _ABIN32

mips64el-linux-gnuabin32

# elif _MIPS_SIM == _ABI64

mips64el-linux-gnuabi64

# else

# error unknown platform triplet

# endif

# elif defined(__mips_hard_float)

# if _MIPS_SIM == _ABIO32

mips-linux-gnu

# elif _MIPS_SIM == _ABIN32

mips64-linux-gnuabin32

# elif _MIPS_SIM == _ABI64

mips64-linux-gnuabi64

# else

# error unknown platform triplet

# endif

# elif defined(__or1k__)

or1k-linux-gnu

# elif defined(__powerpc__) && defined(__SPE__)

powerpc-linux-gnuspe

# elif defined(__powerpc64__)

# if defined(__LITTLE_ENDIAN__)

powerpc64le-linux-gnu

# else

powerpc64-linux-gnu

# endif

# elif defined(__powerpc__)

powerpc-linux-gnu

# elif defined(__s390x__)

s390x-linux-gnu

# elif defined(__s390__)

s390-linux-gnu

# elif defined(__sh__) && defined(__LITTLE_ENDIAN__)

sh4-linux-gnu

# elif defined(__sparc__) && defined(__arch64__)

sparc64-linux-gnu

# elif defined(__sparc__)

sparc-linux-gnu

# elif defined(__riscv)

# if __riscv_xlen == 32

riscv32-linux-gnu

# elif __riscv_xlen == 64

riscv64-linux-gnu

# else

# error unknown platform triplet

# endif

# else

# error unknown platform triplet

# endif

#elif defined(__FreeBSD_kernel__)

# if defined(__LP64__)

x86_64-kfreebsd-gnu

# elif defined(__i386__)

i386-kfreebsd-gnu

# else

# error unknown platform triplet

# endif

#elif defined(__gnu_hurd__)

i386-gnu

#elif defined(__APPLE__)

darwin

#else

# error unknown platform triplet

#endif

EOF

if $CPP $CPPFLAGS conftest.c >conftest.out 2>/dev/null; then

PLATFORM_TRIPLET=`grep -v '^#' conftest.out | grep -v '^ *$' | tr -d ' '`

AC_MSG_RESULT([$PLATFORM_TRIPLET])

else

AC_MSG_RESULT([none])

fi

rm -f conftest.c conftest.out

if test x$PLATFORM_TRIPLET != xdarwin; then

MULTIARCH=$($CC --print-multiarch 2>/dev/null)

fi

AC_SUBST(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)

AC_MSG_CHECKING([for -Wl,--no-as-needed])

save_LDFLAGS="$LDFLAGS"

LDFLAGS="$LDFLAGS -Wl,--no-as-needed"

AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],

[NO_AS_NEEDED="-Wl,--no-as-needed"

AC_MSG_RESULT([yes])],

[NO_AS_NEEDED=""

AC_MSG_RESULT([no])])

LDFLAGS="$save_LDFLAGS"

AC_SUBST(NO_AS_NEEDED)

# checks for UNIX variants that set C preprocessor variables

AC_USE_SYSTEM_EXTENSIONS

AC_MSG_CHECKING([for the Android API level])

cat >> conftest.c <<EOF

#ifdef __ANDROID__

android_api = __ANDROID_API__

arm_arch = __ARM_ARCH

#else

#error not Android

#endif

EOF

if $CPP $CPPFLAGS conftest.c >conftest.out 2>/dev/null; then

ANDROID_API_LEVEL=`sed -n -e '/__ANDROID_API__/d' -e 's/^android_api = //p' conftest.out`

_arm_arch=`sed -n -e '/__ARM_ARCH/d' -e 's/^arm_arch = //p' conftest.out`

AC_MSG_RESULT([$ANDROID_API_LEVEL])

if test -z "$ANDROID_API_LEVEL"; then

echo 'Fatal: you must define __ANDROID_API__'

exit 1

fi

AC_DEFINE_UNQUOTED(ANDROID_API_LEVEL, $ANDROID_API_LEVEL, [The Android API level.])

AC_MSG_CHECKING([for the Android arm ABI])

AC_MSG_RESULT([$_arm_arch])

if test "$_arm_arch" = 7; then

BASECFLAGS="${BASECFLAGS} -mfloat-abi=softfp -mfpu=vfpv3-d16"

LDFLAGS="${LDFLAGS} -march=armv7-a -Wl,--fix-cortex-a8"

fi

else

AC_MSG_RESULT([not Android])

fi

rm -f conftest.c conftest.out

# Check for unsupported systems

case $ac_sys_system/$ac_sys_release in

atheos*|Linux*/1*)

echo This system \($ac_sys_system/$ac_sys_release\) is no longer supported.

echo See README for details.

exit 1;;

esac

AC_EXEEXT

AC_MSG_CHECKING(for --with-suffix)

AC_ARG_WITH(suffix,

AS_HELP_STRING([--with-suffix=.exe], [set executable suffix]),

[

case $withval in

no) EXEEXT=;;

yes) EXEEXT=.exe;;

*) EXEEXT=$withval;;

esac])

AC_MSG_RESULT($EXEEXT)

# Test whether we're running on a non-case-sensitive system, in which

# case we give a warning if no ext is given

AC_SUBST(BUILDEXEEXT)

AC_MSG_CHECKING(for case-insensitive build directory)

if test ! -d CaseSensitiveTestDir; then

mkdir CaseSensitiveTestDir

fi

if test -d casesensitivetestdir

then

AC_MSG_RESULT(yes)

BUILDEXEEXT=.exe

else

AC_MSG_RESULT(no)

BUILDEXEEXT=$EXEEXT

fi

rmdir CaseSensitiveTestDir

case $ac_sys_system in

hp*|HP*)

case $CC in

cc|*/cc) CC="$CC -Ae";;

esac;;

esac

AC_SUBST(LIBRARY)

AC_MSG_CHECKING(LIBRARY)

if test -z "$LIBRARY"

then

LIBRARY='libpython$(VERSION)$(ABIFLAGS).a'

fi

AC_MSG_RESULT($LIBRARY)

# LDLIBRARY is the name of the library to link against (as opposed to the

# name of the library into which to insert object files). BLDLIBRARY is also

# the library to link against, usually. On Mac OS X frameworks, BLDLIBRARY

# is blank as the main program is not linked directly against LDLIBRARY.