aclocal.m4 - platform/external/python/cpython3 - Git at Google

 # generated automatically by aclocal 1.16.3 -*- Autoconf -*-

 # Copyright (C) 1996-2020 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.

 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 # PARTICULAR PURPOSE.

 m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
 # ===============================================================================
 #  https://www.gnu.org/software/autoconf-archive/ax_c_float_words_bigendian.html
 # ===============================================================================
 #
 # SYNOPSIS
 #
 #   AX_C_FLOAT_WORDS_BIGENDIAN([ACTION-IF-TRUE], [ACTION-IF-FALSE], [ACTION-IF-UNKNOWN])
 #
 # DESCRIPTION
 #
 #   Checks the ordering of words within a multi-word float. This check is
 #   necessary because on some systems (e.g. certain ARM systems), the float
 #   word ordering can be different from the byte ordering. In a multi-word
 #   float context, "big-endian" implies that the word containing the sign
 #   bit is found in the memory location with the lowest address. This
 #   implementation was inspired by the AC_C_BIGENDIAN macro in autoconf.
 #
 #   The endianness is detected by first compiling C code that contains a
 #   special double float value, then grepping the resulting object file for
 #   certain strings of ASCII values. The double is specially crafted to have
 #   a binary representation that corresponds with a simple string. In this
 #   implementation, the string "noonsees" was selected because the
 #   individual word values ("noon" and "sees") are palindromes, thus making
 #   this test byte-order agnostic. If grep finds the string "noonsees" in
 #   the object file, the target platform stores float words in big-endian
 #   order. If grep finds "seesnoon", float words are in little-endian order.
 #   If neither value is found, the user is instructed to specify the
 #   ordering.
 #
 # LICENSE
 #
 #   Copyright (c) 2008 Daniel Amelang <dan@amelang.net>
 #
 #   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.

 #serial 11

 AC_DEFUN([AX_C_FLOAT_WORDS_BIGENDIAN],
   [AC_CACHE_CHECK(whether float word ordering is bigendian,
                   ax_cv_c_float_words_bigendian, [

 ax_cv_c_float_words_bigendian=unknown
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[

 double d = 90904234967036810337470478905505011476211692735615632014797120844053488865816695273723469097858056257517020191247487429516932130503560650002327564517570778480236724525140520121371739201496540132640109977779420565776568942592.0;

 ]])], [

 if grep noonsees conftest.$ac_objext >/dev/null ; then
   ax_cv_c_float_words_bigendian=yes
 fi
 if grep seesnoon conftest.$ac_objext >/dev/null ; then
   if test "$ax_cv_c_float_words_bigendian" = unknown; then
     ax_cv_c_float_words_bigendian=no
   else
     ax_cv_c_float_words_bigendian=unknown
   fi
 fi

 ])])

 case $ax_cv_c_float_words_bigendian in
   yes)
     m4_default([$1],
       [AC_DEFINE([FLOAT_WORDS_BIGENDIAN], 1,
                  [Define to 1 if your system stores words within floats
                   with the most significant word first])]) ;;
   no)
     $2 ;;
   *)
     m4_default([$3],
       [AC_MSG_ERROR([

 Unknown float word ordering. You need to manually preset
 ax_cv_c_float_words_bigendian=no (or yes) according to your system.

     ])]) ;;
 esac

 ])# AX_C_FLOAT_WORDS_BIGENDIAN

 # ===========================================================================
 #  https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
 #
 #   AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
 #
 # DESCRIPTION
 #
 #   Check whether the given FLAG works with the current language's compiler
 #   or gives an error.  (Warnings, however, are ignored)
 #
 #   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
 #   success/failure.
 #
 #   If EXTRA-FLAGS is defined, it is added to the current language's default
 #   flags (e.g. CFLAGS) when the check is done.  The check is thus made with
 #   the flags: "CFLAGS EXTRA-FLAGS FLAG".  This can for example be used to
 #   force the compiler to issue an error when a bad flag is given.
 #
 #   INPUT gives an alternative input source to AC_COMPILE_IFELSE.
 #
 #   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
 #   macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
 #
 # LICENSE
 #
 #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
 #   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
 #
 #   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.

 #serial 6

 AC_DEFUN([AX_CHECK_COMPILE_FLAG],
 [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
 AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
 AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
   ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
   _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
   AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
     [AS_VAR_SET(CACHEVAR,[yes])],
     [AS_VAR_SET(CACHEVAR,[no])])
   _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
 AS_VAR_IF(CACHEVAR,yes,
   [m4_default([$2], :)],
   [m4_default([$3], :)])
 AS_VAR_POPDEF([CACHEVAR])dnl
 ])dnl AX_CHECK_COMPILE_FLAGS

 # ===========================================================================
 #     https://www.gnu.org/software/autoconf-archive/ax_check_openssl.html
 # ===========================================================================
 #
 # SYNOPSIS
 #
 #   AX_CHECK_OPENSSL([action-if-found[, action-if-not-found]])
 #
 # DESCRIPTION
 #
 #   Look for OpenSSL in a number of default spots, or in a user-selected
 #   spot (via --with-openssl).  Sets
 #
 #     OPENSSL_INCLUDES to the include directives required
 #     OPENSSL_LIBS to the -l directives required
 #     OPENSSL_LDFLAGS to the -L or -R flags required
 #
 #   and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately
 #
 #   This macro sets OPENSSL_INCLUDES such that source files should use the
 #   openssl/ directory in include directives:
 #
 #     #include <openssl/hmac.h>
 #
 # LICENSE
 #
 #   Copyright (c) 2009,2010 Zmanda Inc. <http://www.zmanda.com/>
 #   Copyright (c) 2009,2010 Dustin J. Mitchell <dustin@zmanda.com>
 #
 #   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.

 #serial 10

 AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL])
 AC_DEFUN([AX_CHECK_OPENSSL], [
     found=false
     AC_ARG_WITH([openssl],
         [AS_HELP_STRING([--with-openssl=DIR],
             [root of the OpenSSL directory])],
         [
             case "$withval" in
             "" | y | ye | yes | n | no)
             AC_MSG_ERROR([Invalid --with-openssl value])
               ;;
             *) ssldirs="$withval"
               ;;
             esac
         ], [
             # if pkg-config is installed and openssl has installed a .pc file,
             # then use that information and don't search ssldirs
             AC_CHECK_TOOL([PKG_CONFIG], [pkg-config])
             if test x"$PKG_CONFIG" != x""; then
                 OPENSSL_LDFLAGS=`$PKG_CONFIG openssl --libs-only-L 2>/dev/null`
                 if test $? = 0; then
                     OPENSSL_LIBS=`$PKG_CONFIG openssl --libs-only-l 2>/dev/null`
                     OPENSSL_INCLUDES=`$PKG_CONFIG openssl --cflags-only-I 2>/dev/null`
                     found=true
                 fi
             fi

             # no such luck; use some default ssldirs
             if ! $found; then
                 ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr"
             fi
         ]
         )


     # note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in
     # an 'openssl' subdirectory

     if ! $found; then
         OPENSSL_INCLUDES=
         for ssldir in $ssldirs; do
             AC_MSG_CHECKING([for openssl/ssl.h in $ssldir])
             if test -f "$ssldir/include/openssl/ssl.h"; then
                 OPENSSL_INCLUDES="-I$ssldir/include"
                 OPENSSL_LDFLAGS="-L$ssldir/lib"
                 OPENSSL_LIBS="-lssl -lcrypto"
                 found=true
                 AC_MSG_RESULT([yes])
                 break
             else
                 AC_MSG_RESULT([no])
             fi
         done

         # if the file wasn't found, well, go ahead and try the link anyway -- maybe
         # it will just work!
     fi

     # try the preprocessor and linker with our new flags,
     # being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS

     AC_MSG_CHECKING([whether compiling and linking against OpenSSL works])
     echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
         "OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD

     save_LIBS="$LIBS"
     save_LDFLAGS="$LDFLAGS"
     save_CPPFLAGS="$CPPFLAGS"
     LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
     LIBS="$OPENSSL_LIBS $LIBS"
     CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
     AC_LINK_IFELSE(
         [AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])],
         [
             AC_MSG_RESULT([yes])
             $1
         ], [
             AC_MSG_RESULT([no])
             $2
         ])
     CPPFLAGS="$save_CPPFLAGS"
     LDFLAGS="$save_LDFLAGS"
     LIBS="$save_LIBS"

     AC_SUBST([OPENSSL_INCLUDES])
     AC_SUBST([OPENSSL_LIBS])
     AC_SUBST([OPENSSL_LDFLAGS])
 ])
	# generated automatically by aclocal 1.16.3 -- Autoconf --

	# Copyright (C) 1996-2020 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.

	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
	# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
	# PARTICULAR PURPOSE.

	m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
	# ===============================================================================
	# https://www.gnu.org/software/autoconf-archive/ax_c_float_words_bigendian.html
	# ===============================================================================
	#
	# SYNOPSIS
	#
	# AX_C_FLOAT_WORDS_BIGENDIAN([ACTION-IF-TRUE], [ACTION-IF-FALSE], [ACTION-IF-UNKNOWN])
	#
	# DESCRIPTION
	#
	# Checks the ordering of words within a multi-word float. This check is
	# necessary because on some systems (e.g. certain ARM systems), the float
	# word ordering can be different from the byte ordering. In a multi-word
	# float context, "big-endian" implies that the word containing the sign
	# bit is found in the memory location with the lowest address. This
	# implementation was inspired by the AC_C_BIGENDIAN macro in autoconf.
	#
	# The endianness is detected by first compiling C code that contains a
	# special double float value, then grepping the resulting object file for
	# certain strings of ASCII values. The double is specially crafted to have
	# a binary representation that corresponds with a simple string. In this
	# implementation, the string "noonsees" was selected because the
	# individual word values ("noon" and "sees") are palindromes, thus making
	# this test byte-order agnostic. If grep finds the string "noonsees" in
	# the object file, the target platform stores float words in big-endian
	# order. If grep finds "seesnoon", float words are in little-endian order.
	# If neither value is found, the user is instructed to specify the
	# ordering.
	#
	# LICENSE
	#
	# Copyright (c) 2008 Daniel Amelang <dan@amelang.net>
	#
	# 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.

	#serial 11

	AC_DEFUN([AX_C_FLOAT_WORDS_BIGENDIAN],
	[AC_CACHE_CHECK(whether float word ordering is bigendian,
	ax_cv_c_float_words_bigendian, [

	ax_cv_c_float_words_bigendian=unknown
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[

	double d = 90904234967036810337470478905505011476211692735615632014797120844053488865816695273723469097858056257517020191247487429516932130503560650002327564517570778480236724525140520121371739201496540132640109977779420565776568942592.0;

	]])], [

	if grep noonsees conftest.$ac_objext >/dev/null ; then
	ax_cv_c_float_words_bigendian=yes
	fi
	if grep seesnoon conftest.$ac_objext >/dev/null ; then
	if test "$ax_cv_c_float_words_bigendian" = unknown; then
	ax_cv_c_float_words_bigendian=no
	else
	ax_cv_c_float_words_bigendian=unknown
	fi
	fi

	])])

	case $ax_cv_c_float_words_bigendian in
	yes)
	m4_default([$1],
	[AC_DEFINE([FLOAT_WORDS_BIGENDIAN], 1,
	[Define to 1 if your system stores words within floats
	with the most significant word first])]) ;;
	no)
	$2 ;;
	*)
	m4_default([$3],
	[AC_MSG_ERROR([

	Unknown float word ordering. You need to manually preset
	ax_cv_c_float_words_bigendian=no (or yes) according to your system.

	])]) ;;
	esac

	])# AX_C_FLOAT_WORDS_BIGENDIAN

	# ===========================================================================
	# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
	# ===========================================================================
	#
	# SYNOPSIS
	#
	# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
	#
	# DESCRIPTION
	#
	# Check whether the given FLAG works with the current language's compiler
	# or gives an error. (Warnings, however, are ignored)
	#
	# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
	# success/failure.
	#
	# If EXTRA-FLAGS is defined, it is added to the current language's default
	# flags (e.g. CFLAGS) when the check is done. The check is thus made with
	# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
	# force the compiler to issue an error when a bad flag is given.
	#
	# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
	#
	# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
	# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
	#
	# LICENSE
	#
	# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
	# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
	#
	# 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.

	#serial 6

	AC_DEFUN([AX_CHECK_COMPILE_FLAG],
	[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
	AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
	AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
	ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
	_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
	AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
	[AS_VAR_SET(CACHEVAR,[yes])],
	[AS_VAR_SET(CACHEVAR,[no])])
	_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
	AS_VAR_IF(CACHEVAR,yes,
	[m4_default([$2], :)],
	[m4_default([$3], :)])
	AS_VAR_POPDEF([CACHEVAR])dnl
	])dnl AX_CHECK_COMPILE_FLAGS

	# ===========================================================================
	# https://www.gnu.org/software/autoconf-archive/ax_check_openssl.html
	# ===========================================================================
	#
	# SYNOPSIS
	#
	# AX_CHECK_OPENSSL([action-if-found[, action-if-not-found]])
	#
	# DESCRIPTION
	#
	# Look for OpenSSL in a number of default spots, or in a user-selected
	# spot (via --with-openssl). Sets
	#
	# OPENSSL_INCLUDES to the include directives required
	# OPENSSL_LIBS to the -l directives required
	# OPENSSL_LDFLAGS to the -L or -R flags required
	#
	# and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately
	#
	# This macro sets OPENSSL_INCLUDES such that source files should use the
	# openssl/ directory in include directives:
	#
	# #include <openssl/hmac.h>
	#
	# LICENSE
	#
	# Copyright (c) 2009,2010 Zmanda Inc. <http://www.zmanda.com/>
	# Copyright (c) 2009,2010 Dustin J. Mitchell <dustin@zmanda.com>
	#
	# 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.

	#serial 10

	AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL])
	AC_DEFUN([AX_CHECK_OPENSSL], [
	found=false
	AC_ARG_WITH([openssl],
	[AS_HELP_STRING([--with-openssl=DIR],
	[root of the OpenSSL directory])],
	[
	case "$withval" in
	"" \| y \| ye \| yes \| n \| no)
	AC_MSG_ERROR([Invalid --with-openssl value])
	;;
	*) ssldirs="$withval"
	;;
	esac
	], [
	# if pkg-config is installed and openssl has installed a .pc file,
	# then use that information and don't search ssldirs
	AC_CHECK_TOOL([PKG_CONFIG], [pkg-config])
	if test x"$PKG_CONFIG" != x""; then
	OPENSSL_LDFLAGS=`$PKG_CONFIG openssl --libs-only-L 2>/dev/null`
	if test $? = 0; then
	OPENSSL_LIBS=`$PKG_CONFIG openssl --libs-only-l 2>/dev/null`
	OPENSSL_INCLUDES=`$PKG_CONFIG openssl --cflags-only-I 2>/dev/null`
	found=true
	fi
	fi

	# no such luck; use some default ssldirs
	if ! $found; then
	ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr"
	fi
	]
	)


	# note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in
	# an 'openssl' subdirectory

	if ! $found; then
	OPENSSL_INCLUDES=
	for ssldir in $ssldirs; do
	AC_MSG_CHECKING([for openssl/ssl.h in $ssldir])
	if test -f "$ssldir/include/openssl/ssl.h"; then
	OPENSSL_INCLUDES="-I$ssldir/include"
	OPENSSL_LDFLAGS="-L$ssldir/lib"
	OPENSSL_LIBS="-lssl -lcrypto"
	found=true
	AC_MSG_RESULT([yes])
	break
	else
	AC_MSG_RESULT([no])
	fi
	done

	# if the file wasn't found, well, go ahead and try the link anyway -- maybe
	# it will just work!
	fi

	# try the preprocessor and linker with our new flags,
	# being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS

	AC_MSG_CHECKING([whether compiling and linking against OpenSSL works])
	echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
	"OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD

	save_LIBS="$LIBS"
	save_LDFLAGS="$LDFLAGS"
	save_CPPFLAGS="$CPPFLAGS"
	LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
	LIBS="$OPENSSL_LIBS $LIBS"
	CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
	AC_LINK_IFELSE(
	[AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])],
	[
	AC_MSG_RESULT([yes])
	$1
	], [
	AC_MSG_RESULT([no])
	$2
	])
	CPPFLAGS="$save_CPPFLAGS"
	LDFLAGS="$save_LDFLAGS"
	LIBS="$save_LIBS"

	AC_SUBST([OPENSSL_INCLUDES])
	AC_SUBST([OPENSSL_LIBS])
	AC_SUBST([OPENSSL_LDFLAGS])
	])