xref: /freebsd/contrib/libevent/aclocal.m4 (revision 5ca8e32633c4ffbbcd6762e5888b6a4ba0708c6c)
1# generated automatically by aclocal 1.16.2 -*- Autoconf -*-
2
3# Copyright (C) 1996-2020 Free Software Foundation, Inc.
4
5# This file is free software; the Free Software Foundation
6# gives unlimited permission to copy and/or distribute it,
7# with or without modifications, as long as this notice is preserved.
8
9# This program is distributed in the hope that it will be useful,
10# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
11# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
12# PARTICULAR PURPOSE.
13
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23# Copyright (C) 2002-2020 Free Software Foundation, Inc.
24#
25# This file is free software; the Free Software Foundation
26# gives unlimited permission to copy and/or distribute it,
27# with or without modifications, as long as this notice is preserved.
28
29# AM_AUTOMAKE_VERSION(VERSION)
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59# AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-
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61# Copyright (C) 2001-2020 Free Software Foundation, Inc.
62#
63# This file is free software; the Free Software Foundation
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111# AM_CONDITIONAL                                            -*- Autoconf -*-
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113# Copyright (C) 1997-2020 Free Software Foundation, Inc.
114#
115# This file is free software; the Free Software Foundation
116# gives unlimited permission to copy and/or distribute it,
117# with or without modifications, as long as this notice is preserved.
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144# Copyright (C) 1999-2020 Free Software Foundation, Inc.
145#
146# This file is free software; the Free Software Foundation
147# gives unlimited permission to copy and/or distribute it,
148# with or without modifications, as long as this notice is preserved.
149
150
151# There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be
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157
158# _AM_DEPENDENCIES(NAME)
159# ----------------------
160# See how the compiler implements dependency checking.
161# NAME is "CC", "CXX", "OBJC", "OBJCXX", "UPC", or "GJC".
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288  cd ..
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300
301# AM_SET_DEPDIR
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305AC_DEFUN([AM_SET_DEPDIR],
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310
311# AM_DEP_TRACK
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315AS_HELP_STRING(
316  [--enable-dependency-tracking],
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318AS_HELP_STRING(
319  [--disable-dependency-tracking],
320  [speeds up one-time build])])
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332
333# Generate code to set up dependency tracking.              -*- Autoconf -*-
334
335# Copyright (C) 1999-2020 Free Software Foundation, Inc.
336#
337# This file is free software; the Free Software Foundation
338# gives unlimited permission to copy and/or distribute it,
339# with or without modifications, as long as this notice is preserved.
340
341# _AM_OUTPUT_DEPENDENCY_COMMANDS
342# ------------------------------
343AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
344[{
345  # Older Autoconf quotes --file arguments for eval, but not when files
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348  # TODO: see whether this extra hack can be removed once we start
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350  AS_CASE([$CONFIG_FILES],
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387
388
389# AM_OUTPUT_DEPENDENCY_COMMANDS
390# -----------------------------
391# This macro should only be invoked once -- use via AC_REQUIRE.
392#
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399     [AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"])])
400
401# Do all the work for Automake.                             -*- Autoconf -*-
402
403# Copyright (C) 1996-2020 Free Software Foundation, Inc.
404#
405# This file is free software; the Free Software Foundation
406# gives unlimited permission to copy and/or distribute it,
407# with or without modifications, as long as this notice is preserved.
408
409# This macro actually does too much.  Some checks are only needed if
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412dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
413m4_define([AC_PROG_CC],
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418# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
419# AM_INIT_AUTOMAKE([OPTIONS])
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446# test whether we have cygpath
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473_AM_IF_OPTION([no-define],,
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477# Some tools Automake needs.
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482AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
483AM_MISSING_PROG([AUTOHEADER], [autoheader])
484AM_MISSING_PROG([MAKEINFO], [makeinfo])
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486AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
487AC_REQUIRE([AC_PROG_MKDIR_P])dnl
488# For better backward compatibility.  To be removed once Automake 1.9.x
489# dies out for good.  For more background, see:
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491# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
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515		  [_AM_DEPENDENCIES([OBJCXX])],
516		  [m4_define([AC_PROG_OBJCXX],
517			     m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
518])
519AC_REQUIRE([AM_SILENT_RULES])dnl
520dnl The testsuite driver may need to know about EXEEXT, so add the
521dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen.  This
522dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
523AC_CONFIG_COMMANDS_PRE(dnl
524[m4_provide_if([_AM_COMPILER_EXEEXT],
525  [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
526
527# POSIX will say in a future version that running "rm -f" with no argument
528# is OK; and we want to be able to make that assumption in our Makefile
529# recipes.  So use an aggressive probe to check that the usage we want is
530# actually supported "in the wild" to an acceptable degree.
531# See automake bug#10828.
532# To make any issue more visible, cause the running configure to be aborted
533# by default if the 'rm' program in use doesn't match our expectations; the
534# user can still override this though.
535if rm -f && rm -fr && rm -rf; then : OK; else
536  cat >&2 <<'END'
537Oops!
538
539Your 'rm' program seems unable to run without file operands specified
540on the command line, even when the '-f' option is present.  This is contrary
541to the behaviour of most rm programs out there, and not conforming with
542the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
543
544Please tell bug-automake@gnu.org about your system, including the value
545of your $PATH and any error possibly output before this message.  This
546can help us improve future automake versions.
547
548END
549  if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
550    echo 'Configuration will proceed anyway, since you have set the' >&2
551    echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
552    echo >&2
553  else
554    cat >&2 <<'END'
555Aborting the configuration process, to ensure you take notice of the issue.
556
557You can download and install GNU coreutils to get an 'rm' implementation
558that behaves properly: <https://www.gnu.org/software/coreutils/>.
559
560If you want to complete the configuration process using your problematic
561'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
562to "yes", and re-run configure.
563
564END
565    AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
566  fi
567fi
568dnl The trailing newline in this macro's definition is deliberate, for
569dnl backward compatibility and to allow trailing 'dnl'-style comments
570dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
571])
572
573dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
574dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
575dnl mangled by Autoconf and run in a shell conditional statement.
576m4_define([_AC_COMPILER_EXEEXT],
577m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
578
579# When config.status generates a header, we must update the stamp-h file.
580# This file resides in the same directory as the config header
581# that is generated.  The stamp files are numbered to have different names.
582
583# Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
584# loop where config.status creates the headers, so we can generate
585# our stamp files there.
586AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
587[# Compute $1's index in $config_headers.
588_am_arg=$1
589_am_stamp_count=1
590for _am_header in $config_headers :; do
591  case $_am_header in
592    $_am_arg | $_am_arg:* )
593      break ;;
594    * )
595      _am_stamp_count=`expr $_am_stamp_count + 1` ;;
596  esac
597done
598echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
599
600# Copyright (C) 2001-2020 Free Software Foundation, Inc.
601#
602# This file is free software; the Free Software Foundation
603# gives unlimited permission to copy and/or distribute it,
604# with or without modifications, as long as this notice is preserved.
605
606# AM_PROG_INSTALL_SH
607# ------------------
608# Define $install_sh.
609AC_DEFUN([AM_PROG_INSTALL_SH],
610[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
611if test x"${install_sh+set}" != xset; then
612  case $am_aux_dir in
613  *\ * | *\	*)
614    install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
615  *)
616    install_sh="\${SHELL} $am_aux_dir/install-sh"
617  esac
618fi
619AC_SUBST([install_sh])])
620
621# Copyright (C) 2003-2020 Free Software Foundation, Inc.
622#
623# This file is free software; the Free Software Foundation
624# gives unlimited permission to copy and/or distribute it,
625# with or without modifications, as long as this notice is preserved.
626
627# Check whether the underlying file-system supports filenames
628# with a leading dot.  For instance MS-DOS doesn't.
629AC_DEFUN([AM_SET_LEADING_DOT],
630[rm -rf .tst 2>/dev/null
631mkdir .tst 2>/dev/null
632if test -d .tst; then
633  am__leading_dot=.
634else
635  am__leading_dot=_
636fi
637rmdir .tst 2>/dev/null
638AC_SUBST([am__leading_dot])])
639
640# Check to see how 'make' treats includes.	            -*- Autoconf -*-
641
642# Copyright (C) 2001-2020 Free Software Foundation, Inc.
643#
644# This file is free software; the Free Software Foundation
645# gives unlimited permission to copy and/or distribute it,
646# with or without modifications, as long as this notice is preserved.
647
648# AM_MAKE_INCLUDE()
649# -----------------
650# Check whether make has an 'include' directive that can support all
651# the idioms we need for our automatic dependency tracking code.
652AC_DEFUN([AM_MAKE_INCLUDE],
653[AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
654cat > confinc.mk << 'END'
655am__doit:
656	@echo this is the am__doit target >confinc.out
657.PHONY: am__doit
658END
659am__include="#"
660am__quote=
661# BSD make does it like this.
662echo '.include "confinc.mk" # ignored' > confmf.BSD
663# Other make implementations (GNU, Solaris 10, AIX) do it like this.
664echo 'include confinc.mk # ignored' > confmf.GNU
665_am_result=no
666for s in GNU BSD; do
667  AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
668  AS_CASE([$?:`cat confinc.out 2>/dev/null`],
669      ['0:this is the am__doit target'],
670      [AS_CASE([$s],
671          [BSD], [am__include='.include' am__quote='"'],
672          [am__include='include' am__quote=''])])
673  if test "$am__include" != "#"; then
674    _am_result="yes ($s style)"
675    break
676  fi
677done
678rm -f confinc.* confmf.*
679AC_MSG_RESULT([${_am_result}])
680AC_SUBST([am__include])])
681AC_SUBST([am__quote])])
682
683# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
684
685# Copyright (C) 1997-2020 Free Software Foundation, Inc.
686#
687# This file is free software; the Free Software Foundation
688# gives unlimited permission to copy and/or distribute it,
689# with or without modifications, as long as this notice is preserved.
690
691# AM_MISSING_PROG(NAME, PROGRAM)
692# ------------------------------
693AC_DEFUN([AM_MISSING_PROG],
694[AC_REQUIRE([AM_MISSING_HAS_RUN])
695$1=${$1-"${am_missing_run}$2"}
696AC_SUBST($1)])
697
698# AM_MISSING_HAS_RUN
699# ------------------
700# Define MISSING if not defined so far and test if it is modern enough.
701# If it is, set am_missing_run to use it, otherwise, to nothing.
702AC_DEFUN([AM_MISSING_HAS_RUN],
703[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
704AC_REQUIRE_AUX_FILE([missing])dnl
705if test x"${MISSING+set}" != xset; then
706  case $am_aux_dir in
707  *\ * | *\	*)
708    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
709  *)
710    MISSING="\${SHELL} $am_aux_dir/missing" ;;
711  esac
712fi
713# Use eval to expand $SHELL
714if eval "$MISSING --is-lightweight"; then
715  am_missing_run="$MISSING "
716else
717  am_missing_run=
718  AC_MSG_WARN(['missing' script is too old or missing])
719fi
720])
721
722# Helper functions for option handling.                     -*- Autoconf -*-
723
724# Copyright (C) 2001-2020 Free Software Foundation, Inc.
725#
726# This file is free software; the Free Software Foundation
727# gives unlimited permission to copy and/or distribute it,
728# with or without modifications, as long as this notice is preserved.
729
730# _AM_MANGLE_OPTION(NAME)
731# -----------------------
732AC_DEFUN([_AM_MANGLE_OPTION],
733[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
734
735# _AM_SET_OPTION(NAME)
736# --------------------
737# Set option NAME.  Presently that only means defining a flag for this option.
738AC_DEFUN([_AM_SET_OPTION],
739[m4_define(_AM_MANGLE_OPTION([$1]), [1])])
740
741# _AM_SET_OPTIONS(OPTIONS)
742# ------------------------
743# OPTIONS is a space-separated list of Automake options.
744AC_DEFUN([_AM_SET_OPTIONS],
745[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
746
747# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
748# -------------------------------------------
749# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
750AC_DEFUN([_AM_IF_OPTION],
751[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
752
753# Copyright (C) 1999-2020 Free Software Foundation, Inc.
754#
755# This file is free software; the Free Software Foundation
756# gives unlimited permission to copy and/or distribute it,
757# with or without modifications, as long as this notice is preserved.
758
759# _AM_PROG_CC_C_O
760# ---------------
761# Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
762# to automatically call this.
763AC_DEFUN([_AM_PROG_CC_C_O],
764[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
765AC_REQUIRE_AUX_FILE([compile])dnl
766AC_LANG_PUSH([C])dnl
767AC_CACHE_CHECK(
768  [whether $CC understands -c and -o together],
769  [am_cv_prog_cc_c_o],
770  [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
771  # Make sure it works both with $CC and with simple cc.
772  # Following AC_PROG_CC_C_O, we do the test twice because some
773  # compilers refuse to overwrite an existing .o file with -o,
774  # though they will create one.
775  am_cv_prog_cc_c_o=yes
776  for am_i in 1 2; do
777    if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
778         && test -f conftest2.$ac_objext; then
779      : OK
780    else
781      am_cv_prog_cc_c_o=no
782      break
783    fi
784  done
785  rm -f core conftest*
786  unset am_i])
787if test "$am_cv_prog_cc_c_o" != yes; then
788   # Losing compiler, so override with the script.
789   # FIXME: It is wrong to rewrite CC.
790   # But if we don't then we get into trouble of one sort or another.
791   # A longer-term fix would be to have automake use am__CC in this case,
792   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
793   CC="$am_aux_dir/compile $CC"
794fi
795AC_LANG_POP([C])])
796
797# For backward compatibility.
798AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
799
800# Copyright (C) 2001-2020 Free Software Foundation, Inc.
801#
802# This file is free software; the Free Software Foundation
803# gives unlimited permission to copy and/or distribute it,
804# with or without modifications, as long as this notice is preserved.
805
806# AM_RUN_LOG(COMMAND)
807# -------------------
808# Run COMMAND, save the exit status in ac_status, and log it.
809# (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
810AC_DEFUN([AM_RUN_LOG],
811[{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
812   ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
813   ac_status=$?
814   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
815   (exit $ac_status); }])
816
817# Check to make sure that the build environment is sane.    -*- Autoconf -*-
818
819# Copyright (C) 1996-2020 Free Software Foundation, Inc.
820#
821# This file is free software; the Free Software Foundation
822# gives unlimited permission to copy and/or distribute it,
823# with or without modifications, as long as this notice is preserved.
824
825# AM_SANITY_CHECK
826# ---------------
827AC_DEFUN([AM_SANITY_CHECK],
828[AC_MSG_CHECKING([whether build environment is sane])
829# Reject unsafe characters in $srcdir or the absolute working directory
830# name.  Accept space and tab only in the latter.
831am_lf='
832'
833case `pwd` in
834  *[[\\\"\#\$\&\'\`$am_lf]]*)
835    AC_MSG_ERROR([unsafe absolute working directory name]);;
836esac
837case $srcdir in
838  *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
839    AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
840esac
841
842# Do 'set' in a subshell so we don't clobber the current shell's
843# arguments.  Must try -L first in case configure is actually a
844# symlink; some systems play weird games with the mod time of symlinks
845# (eg FreeBSD returns the mod time of the symlink's containing
846# directory).
847if (
848   am_has_slept=no
849   for am_try in 1 2; do
850     echo "timestamp, slept: $am_has_slept" > conftest.file
851     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
852     if test "$[*]" = "X"; then
853	# -L didn't work.
854	set X `ls -t "$srcdir/configure" conftest.file`
855     fi
856     if test "$[*]" != "X $srcdir/configure conftest.file" \
857	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
858
859	# If neither matched, then we have a broken ls.  This can happen
860	# if, for instance, CONFIG_SHELL is bash and it inherits a
861	# broken ls alias from the environment.  This has actually
862	# happened.  Such a system could not be considered "sane".
863	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
864  alias in your environment])
865     fi
866     if test "$[2]" = conftest.file || test $am_try -eq 2; then
867       break
868     fi
869     # Just in case.
870     sleep 1
871     am_has_slept=yes
872   done
873   test "$[2]" = conftest.file
874   )
875then
876   # Ok.
877   :
878else
879   AC_MSG_ERROR([newly created file is older than distributed files!
880Check your system clock])
881fi
882AC_MSG_RESULT([yes])
883# If we didn't sleep, we still need to ensure time stamps of config.status and
884# generated files are strictly newer.
885am_sleep_pid=
886if grep 'slept: no' conftest.file >/dev/null 2>&1; then
887  ( sleep 1 ) &
888  am_sleep_pid=$!
889fi
890AC_CONFIG_COMMANDS_PRE(
891  [AC_MSG_CHECKING([that generated files are newer than configure])
892   if test -n "$am_sleep_pid"; then
893     # Hide warnings about reused PIDs.
894     wait $am_sleep_pid 2>/dev/null
895   fi
896   AC_MSG_RESULT([done])])
897rm -f conftest.file
898])
899
900# Copyright (C) 2009-2020 Free Software Foundation, Inc.
901#
902# This file is free software; the Free Software Foundation
903# gives unlimited permission to copy and/or distribute it,
904# with or without modifications, as long as this notice is preserved.
905
906# AM_SILENT_RULES([DEFAULT])
907# --------------------------
908# Enable less verbose build rules; with the default set to DEFAULT
909# ("yes" being less verbose, "no" or empty being verbose).
910AC_DEFUN([AM_SILENT_RULES],
911[AC_ARG_ENABLE([silent-rules], [dnl
912AS_HELP_STRING(
913  [--enable-silent-rules],
914  [less verbose build output (undo: "make V=1")])
915AS_HELP_STRING(
916  [--disable-silent-rules],
917  [verbose build output (undo: "make V=0")])dnl
918])
919case $enable_silent_rules in @%:@ (((
920  yes) AM_DEFAULT_VERBOSITY=0;;
921   no) AM_DEFAULT_VERBOSITY=1;;
922    *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
923esac
924dnl
925dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
926dnl do not support nested variable expansions.
927dnl See automake bug#9928 and bug#10237.
928am_make=${MAKE-make}
929AC_CACHE_CHECK([whether $am_make supports nested variables],
930   [am_cv_make_support_nested_variables],
931   [if AS_ECHO([['TRUE=$(BAR$(V))
932BAR0=false
933BAR1=true
934V=1
935am__doit:
936	@$(TRUE)
937.PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
938  am_cv_make_support_nested_variables=yes
939else
940  am_cv_make_support_nested_variables=no
941fi])
942if test $am_cv_make_support_nested_variables = yes; then
943  dnl Using '$V' instead of '$(V)' breaks IRIX make.
944  AM_V='$(V)'
945  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
946else
947  AM_V=$AM_DEFAULT_VERBOSITY
948  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
949fi
950AC_SUBST([AM_V])dnl
951AM_SUBST_NOTMAKE([AM_V])dnl
952AC_SUBST([AM_DEFAULT_V])dnl
953AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
954AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
955AM_BACKSLASH='\'
956AC_SUBST([AM_BACKSLASH])dnl
957_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
958])
959
960# Copyright (C) 2001-2020 Free Software Foundation, Inc.
961#
962# This file is free software; the Free Software Foundation
963# gives unlimited permission to copy and/or distribute it,
964# with or without modifications, as long as this notice is preserved.
965
966# AM_PROG_INSTALL_STRIP
967# ---------------------
968# One issue with vendor 'install' (even GNU) is that you can't
969# specify the program used to strip binaries.  This is especially
970# annoying in cross-compiling environments, where the build's strip
971# is unlikely to handle the host's binaries.
972# Fortunately install-sh will honor a STRIPPROG variable, so we
973# always use install-sh in "make install-strip", and initialize
974# STRIPPROG with the value of the STRIP variable (set by the user).
975AC_DEFUN([AM_PROG_INSTALL_STRIP],
976[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
977# Installed binaries are usually stripped using 'strip' when the user
978# run "make install-strip".  However 'strip' might not be the right
979# tool to use in cross-compilation environments, therefore Automake
980# will honor the 'STRIP' environment variable to overrule this program.
981dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
982if test "$cross_compiling" != no; then
983  AC_CHECK_TOOL([STRIP], [strip], :)
984fi
985INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
986AC_SUBST([INSTALL_STRIP_PROGRAM])])
987
988# Copyright (C) 2006-2020 Free Software Foundation, Inc.
989#
990# This file is free software; the Free Software Foundation
991# gives unlimited permission to copy and/or distribute it,
992# with or without modifications, as long as this notice is preserved.
993
994# _AM_SUBST_NOTMAKE(VARIABLE)
995# ---------------------------
996# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
997# This macro is traced by Automake.
998AC_DEFUN([_AM_SUBST_NOTMAKE])
999
1000# AM_SUBST_NOTMAKE(VARIABLE)
1001# --------------------------
1002# Public sister of _AM_SUBST_NOTMAKE.
1003AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
1004
1005# Check how to create a tarball.                            -*- Autoconf -*-
1006
1007# Copyright (C) 2004-2020 Free Software Foundation, Inc.
1008#
1009# This file is free software; the Free Software Foundation
1010# gives unlimited permission to copy and/or distribute it,
1011# with or without modifications, as long as this notice is preserved.
1012
1013# _AM_PROG_TAR(FORMAT)
1014# --------------------
1015# Check how to create a tarball in format FORMAT.
1016# FORMAT should be one of 'v7', 'ustar', or 'pax'.
1017#
1018# Substitute a variable $(am__tar) that is a command
1019# writing to stdout a FORMAT-tarball containing the directory
1020# $tardir.
1021#     tardir=directory && $(am__tar) > result.tar
1022#
1023# Substitute a variable $(am__untar) that extract such
1024# a tarball read from stdin.
1025#     $(am__untar) < result.tar
1026#
1027AC_DEFUN([_AM_PROG_TAR],
1028[# Always define AMTAR for backward compatibility.  Yes, it's still used
1029# in the wild :-(  We should find a proper way to deprecate it ...
1030AC_SUBST([AMTAR], ['$${TAR-tar}'])
1031
1032# We'll loop over all known methods to create a tar archive until one works.
1033_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
1034
1035m4_if([$1], [v7],
1036  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
1037
1038  [m4_case([$1],
1039    [ustar],
1040     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
1041      # There is notably a 21 bits limit for the UID and the GID.  In fact,
1042      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
1043      # and bug#13588).
1044      am_max_uid=2097151 # 2^21 - 1
1045      am_max_gid=$am_max_uid
1046      # The $UID and $GID variables are not portable, so we need to resort
1047      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
1048      # below are definitely unexpected, so allow the users to see them
1049      # (that is, avoid stderr redirection).
1050      am_uid=`id -u || echo unknown`
1051      am_gid=`id -g || echo unknown`
1052      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
1053      if test $am_uid -le $am_max_uid; then
1054         AC_MSG_RESULT([yes])
1055      else
1056         AC_MSG_RESULT([no])
1057         _am_tools=none
1058      fi
1059      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
1060      if test $am_gid -le $am_max_gid; then
1061         AC_MSG_RESULT([yes])
1062      else
1063        AC_MSG_RESULT([no])
1064        _am_tools=none
1065      fi],
1066
1067  [pax],
1068    [],
1069
1070  [m4_fatal([Unknown tar format])])
1071
1072  AC_MSG_CHECKING([how to create a $1 tar archive])
1073
1074  # Go ahead even if we have the value already cached.  We do so because we
1075  # need to set the values for the 'am__tar' and 'am__untar' variables.
1076  _am_tools=${am_cv_prog_tar_$1-$_am_tools}
1077
1078  for _am_tool in $_am_tools; do
1079    case $_am_tool in
1080    gnutar)
1081      for _am_tar in tar gnutar gtar; do
1082        AM_RUN_LOG([$_am_tar --version]) && break
1083      done
1084      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
1085      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
1086      am__untar="$_am_tar -xf -"
1087      ;;
1088    plaintar)
1089      # Must skip GNU tar: if it does not support --format= it doesn't create
1090      # ustar tarball either.
1091      (tar --version) >/dev/null 2>&1 && continue
1092      am__tar='tar chf - "$$tardir"'
1093      am__tar_='tar chf - "$tardir"'
1094      am__untar='tar xf -'
1095      ;;
1096    pax)
1097      am__tar='pax -L -x $1 -w "$$tardir"'
1098      am__tar_='pax -L -x $1 -w "$tardir"'
1099      am__untar='pax -r'
1100      ;;
1101    cpio)
1102      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
1103      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
1104      am__untar='cpio -i -H $1 -d'
1105      ;;
1106    none)
1107      am__tar=false
1108      am__tar_=false
1109      am__untar=false
1110      ;;
1111    esac
1112
1113    # If the value was cached, stop now.  We just wanted to have am__tar
1114    # and am__untar set.
1115    test -n "${am_cv_prog_tar_$1}" && break
1116
1117    # tar/untar a dummy directory, and stop if the command works.
1118    rm -rf conftest.dir
1119    mkdir conftest.dir
1120    echo GrepMe > conftest.dir/file
1121    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
1122    rm -rf conftest.dir
1123    if test -s conftest.tar; then
1124      AM_RUN_LOG([$am__untar <conftest.tar])
1125      AM_RUN_LOG([cat conftest.dir/file])
1126      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
1127    fi
1128  done
1129  rm -rf conftest.dir
1130
1131  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
1132  AC_MSG_RESULT([$am_cv_prog_tar_$1])])
1133
1134AC_SUBST([am__tar])
1135AC_SUBST([am__untar])
1136]) # _AM_PROG_TAR
1137
1138m4_include([m4/ac_backport_259_ssizet.m4])
1139m4_include([m4/acx_pthread.m4])
1140m4_include([m4/ax_check_funcs_ex.m4])
1141m4_include([m4/ax_prog_doxygen.m4])
1142m4_include([m4/libevent_openssl.m4])
1143m4_include([m4/libtool.m4])
1144m4_include([m4/ltoptions.m4])
1145m4_include([m4/ltsugar.m4])
1146m4_include([m4/ltversion.m4])
1147m4_include([m4/lt~obsolete.m4])
1148m4_include([m4/ntp_pkg_config.m4])
1149