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1 # generated automatically by aclocal 1.16.3 -*- Autoconf -*-
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3 # Copyright (C) 1996-2020 Free Software Foundation, Inc.
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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
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540 [_AM_DEPENDENCIES([CC])],
541 [m4_define([AC_PROG_CC],
542 m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
543 AC_PROVIDE_IFELSE([AC_PROG_CXX],
544 [_AM_DEPENDENCIES([CXX])],
545 [m4_define([AC_PROG_CXX],
546 m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
547 AC_PROVIDE_IFELSE([AC_PROG_OBJC],
548 [_AM_DEPENDENCIES([OBJC])],
549 [m4_define([AC_PROG_OBJC],
550 m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
551 AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
552 [_AM_DEPENDENCIES([OBJCXX])],
553 [m4_define([AC_PROG_OBJCXX],
554 m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
555 ])
556 AC_REQUIRE([AM_SILENT_RULES])dnl
557 dnl The testsuite driver may need to know about EXEEXT, so add the
558 dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen. This
559 dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
560 AC_CONFIG_COMMANDS_PRE(dnl
561 [m4_provide_if([_AM_COMPILER_EXEEXT],
562 [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
563
564 # POSIX will say in a future version that running "rm -f" with no argument
565 # is OK; and we want to be able to make that assumption in our Makefile
566 # recipes. So use an aggressive probe to check that the usage we want is
567 # actually supported "in the wild" to an acceptable degree.
568 # See automake bug#10828.
569 # To make any issue more visible, cause the running configure to be aborted
570 # by default if the 'rm' program in use doesn't match our expectations; the
571 # user can still override this though.
572 if rm -f && rm -fr && rm -rf; then : OK; else
573 cat >&2 <<'END'
574 Oops!
575
576 Your 'rm' program seems unable to run without file operands specified
577 on the command line, even when the '-f' option is present. This is contrary
578 to the behaviour of most rm programs out there, and not conforming with
579 the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
580
581 Please tell bug-automake@gnu.org about your system, including the value
582 of your $PATH and any error possibly output before this message. This
583 can help us improve future automake versions.
584
585 END
586 if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
587 echo 'Configuration will proceed anyway, since you have set the' >&2
588 echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
589 echo >&2
590 else
591 cat >&2 <<'END'
592 Aborting the configuration process, to ensure you take notice of the issue.
593
594 You can download and install GNU coreutils to get an 'rm' implementation
595 that behaves properly: <https://www.gnu.org/software/coreutils/>.
596
597 If you want to complete the configuration process using your problematic
598 'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
599 to "yes", and re-run configure.
600
601 END
602 AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
603 fi
604 fi
605 dnl The trailing newline in this macro's definition is deliberate, for
606 dnl backward compatibility and to allow trailing 'dnl'-style comments
607 dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
608 ])
609
610 dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion. Do not
611 dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
612 dnl mangled by Autoconf and run in a shell conditional statement.
613 m4_define([_AC_COMPILER_EXEEXT],
614 m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
615
616 # When config.status generates a header, we must update the stamp-h file.
617 # This file resides in the same directory as the config header
618 # that is generated. The stamp files are numbered to have different names.
619
620 # Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
621 # loop where config.status creates the headers, so we can generate
622 # our stamp files there.
623 AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
624 [# Compute $1's index in $config_headers.
625 _am_arg=$1
626 _am_stamp_count=1
627 for _am_header in $config_headers :; do
628 case $_am_header in
629 $_am_arg | $_am_arg:* )
630 break ;;
631 * )
632 _am_stamp_count=`expr $_am_stamp_count + 1` ;;
633 esac
634 done
635 echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
636
637 # Copyright (C) 2001-2020 Free Software Foundation, Inc.
638 #
639 # This file is free software; the Free Software Foundation
640 # gives unlimited permission to copy and/or distribute it,
641 # with or without modifications, as long as this notice is preserved.
642
643 # AM_PROG_INSTALL_SH
644 # ------------------
645 # Define $install_sh.
646 AC_DEFUN([AM_PROG_INSTALL_SH],
647 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
648 if test x"${install_sh+set}" != xset; then
649 case $am_aux_dir in
650 *\ * | *\ *)
651 install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
652 *)
653 install_sh="\${SHELL} $am_aux_dir/install-sh"
654 esac
655 fi
656 AC_SUBST([install_sh])])
657
658 # Copyright (C) 2003-2020 Free Software Foundation, Inc.
659 #
660 # This file is free software; the Free Software Foundation
661 # gives unlimited permission to copy and/or distribute it,
662 # with or without modifications, as long as this notice is preserved.
663
664 # Check whether the underlying file-system supports filenames
665 # with a leading dot. For instance MS-DOS doesn't.
666 AC_DEFUN([AM_SET_LEADING_DOT],
667 [rm -rf .tst 2>/dev/null
668 mkdir .tst 2>/dev/null
669 if test -d .tst; then
670 am__leading_dot=.
671 else
672 am__leading_dot=_
673 fi
674 rmdir .tst 2>/dev/null
675 AC_SUBST([am__leading_dot])])
676
677 # Add --enable-maintainer-mode option to configure. -*- Autoconf -*-
678 # From Jim Meyering
679
680 # Copyright (C) 1996-2020 Free Software Foundation, Inc.
681 #
682 # This file is free software; the Free Software Foundation
683 # gives unlimited permission to copy and/or distribute it,
684 # with or without modifications, as long as this notice is preserved.
685
686 # AM_MAINTAINER_MODE([DEFAULT-MODE])
687 # ----------------------------------
688 # Control maintainer-specific portions of Makefiles.
689 # Default is to disable them, unless 'enable' is passed literally.
690 # For symmetry, 'disable' may be passed as well. Anyway, the user
691 # can override the default with the --enable/--disable switch.
692 AC_DEFUN([AM_MAINTAINER_MODE],
693 [m4_case(m4_default([$1], [disable]),
694 [enable], [m4_define([am_maintainer_other], [disable])],
695 [disable], [m4_define([am_maintainer_other], [enable])],
696 [m4_define([am_maintainer_other], [enable])
697 m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE: $1])])
698 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
699 dnl maintainer-mode's default is 'disable' unless 'enable' is passed
700 AC_ARG_ENABLE([maintainer-mode],
701 [AS_HELP_STRING([--]am_maintainer_other[-maintainer-mode],
702 am_maintainer_other[ make rules and dependencies not useful
703 (and sometimes confusing) to the casual installer])],
704 [USE_MAINTAINER_MODE=$enableval],
705 [USE_MAINTAINER_MODE=]m4_if(am_maintainer_other, [enable], [no], [yes]))
706 AC_MSG_RESULT([$USE_MAINTAINER_MODE])
707 AM_CONDITIONAL([MAINTAINER_MODE], [test $USE_MAINTAINER_MODE = yes])
708 MAINT=$MAINTAINER_MODE_TRUE
709 AC_SUBST([MAINT])dnl
710 ]
711 )
712
713 # Check to see how 'make' treats includes. -*- Autoconf -*-
714
715 # Copyright (C) 2001-2020 Free Software Foundation, Inc.
716 #
717 # This file is free software; the Free Software Foundation
718 # gives unlimited permission to copy and/or distribute it,
719 # with or without modifications, as long as this notice is preserved.
720
721 # AM_MAKE_INCLUDE()
722 # -----------------
723 # Check whether make has an 'include' directive that can support all
724 # the idioms we need for our automatic dependency tracking code.
725 AC_DEFUN([AM_MAKE_INCLUDE],
726 [AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
727 cat > confinc.mk << 'END'
728 am__doit:
729 @echo this is the am__doit target >confinc.out
730 .PHONY: am__doit
731 END
732 am__include="#"
733 am__quote=
734 # BSD make does it like this.
735 echo '.include "confinc.mk" # ignored' > confmf.BSD
736 # Other make implementations (GNU, Solaris 10, AIX) do it like this.
737 echo 'include confinc.mk # ignored' > confmf.GNU
738 _am_result=no
739 for s in GNU BSD; do
740 AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
741 AS_CASE([$?:`cat confinc.out 2>/dev/null`],
742 ['0:this is the am__doit target'],
743 [AS_CASE([$s],
744 [BSD], [am__include='.include' am__quote='"'],
745 [am__include='include' am__quote=''])])
746 if test "$am__include" != "#"; then
747 _am_result="yes ($s style)"
748 break
749 fi
750 done
751 rm -f confinc.* confmf.*
752 AC_MSG_RESULT([${_am_result}])
753 AC_SUBST([am__include])])
754 AC_SUBST([am__quote])])
755
756 # Fake the existence of programs that GNU maintainers use. -*- Autoconf -*-
757
758 # Copyright (C) 1997-2020 Free Software Foundation, Inc.
759 #
760 # This file is free software; the Free Software Foundation
761 # gives unlimited permission to copy and/or distribute it,
762 # with or without modifications, as long as this notice is preserved.
763
764 # AM_MISSING_PROG(NAME, PROGRAM)
765 # ------------------------------
766 AC_DEFUN([AM_MISSING_PROG],
767 [AC_REQUIRE([AM_MISSING_HAS_RUN])
768 $1=${$1-"${am_missing_run}$2"}
769 AC_SUBST($1)])
770
771 # AM_MISSING_HAS_RUN
772 # ------------------
773 # Define MISSING if not defined so far and test if it is modern enough.
774 # If it is, set am_missing_run to use it, otherwise, to nothing.
775 AC_DEFUN([AM_MISSING_HAS_RUN],
776 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
777 AC_REQUIRE_AUX_FILE([missing])dnl
778 if test x"${MISSING+set}" != xset; then
779 MISSING="\${SHELL} '$am_aux_dir/missing'"
780 fi
781 # Use eval to expand $SHELL
782 if eval "$MISSING --is-lightweight"; then
783 am_missing_run="$MISSING "
784 else
785 am_missing_run=
786 AC_MSG_WARN(['missing' script is too old or missing])
787 fi
788 ])
789
790 # Helper functions for option handling. -*- Autoconf -*-
791
792 # Copyright (C) 2001-2020 Free Software Foundation, Inc.
793 #
794 # This file is free software; the Free Software Foundation
795 # gives unlimited permission to copy and/or distribute it,
796 # with or without modifications, as long as this notice is preserved.
797
798 # _AM_MANGLE_OPTION(NAME)
799 # -----------------------
800 AC_DEFUN([_AM_MANGLE_OPTION],
801 [[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
802
803 # _AM_SET_OPTION(NAME)
804 # --------------------
805 # Set option NAME. Presently that only means defining a flag for this option.
806 AC_DEFUN([_AM_SET_OPTION],
807 [m4_define(_AM_MANGLE_OPTION([$1]), [1])])
808
809 # _AM_SET_OPTIONS(OPTIONS)
810 # ------------------------
811 # OPTIONS is a space-separated list of Automake options.
812 AC_DEFUN([_AM_SET_OPTIONS],
813 [m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
814
815 # _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
816 # -------------------------------------------
817 # Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
818 AC_DEFUN([_AM_IF_OPTION],
819 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
820
821 # Copyright (C) 1999-2020 Free Software Foundation, Inc.
822 #
823 # This file is free software; the Free Software Foundation
824 # gives unlimited permission to copy and/or distribute it,
825 # with or without modifications, as long as this notice is preserved.
826
827 # _AM_PROG_CC_C_O
828 # ---------------
829 # Like AC_PROG_CC_C_O, but changed for automake. We rewrite AC_PROG_CC
830 # to automatically call this.
831 AC_DEFUN([_AM_PROG_CC_C_O],
832 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
833 AC_REQUIRE_AUX_FILE([compile])dnl
834 AC_LANG_PUSH([C])dnl
835 AC_CACHE_CHECK(
836 [whether $CC understands -c and -o together],
837 [am_cv_prog_cc_c_o],
838 [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
839 # Make sure it works both with $CC and with simple cc.
840 # Following AC_PROG_CC_C_O, we do the test twice because some
841 # compilers refuse to overwrite an existing .o file with -o,
842 # though they will create one.
843 am_cv_prog_cc_c_o=yes
844 for am_i in 1 2; do
845 if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
846 && test -f conftest2.$ac_objext; then
847 : OK
848 else
849 am_cv_prog_cc_c_o=no
850 break
851 fi
852 done
853 rm -f core conftest*
854 unset am_i])
855 if test "$am_cv_prog_cc_c_o" != yes; then
856 # Losing compiler, so override with the script.
857 # FIXME: It is wrong to rewrite CC.
858 # But if we don't then we get into trouble of one sort or another.
859 # A longer-term fix would be to have automake use am__CC in this case,
860 # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
861 CC="$am_aux_dir/compile $CC"
862 fi
863 AC_LANG_POP([C])])
864
865 # For backward compatibility.
866 AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
867
868 # Copyright (C) 2001-2020 Free Software Foundation, Inc.
869 #
870 # This file is free software; the Free Software Foundation
871 # gives unlimited permission to copy and/or distribute it,
872 # with or without modifications, as long as this notice is preserved.
873
874 # AM_RUN_LOG(COMMAND)
875 # -------------------
876 # Run COMMAND, save the exit status in ac_status, and log it.
877 # (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
878 AC_DEFUN([AM_RUN_LOG],
879 [{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
880 ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
881 ac_status=$?
882 echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
883 (exit $ac_status); }])
884
885 # Check to make sure that the build environment is sane. -*- Autoconf -*-
886
887 # Copyright (C) 1996-2020 Free Software Foundation, Inc.
888 #
889 # This file is free software; the Free Software Foundation
890 # gives unlimited permission to copy and/or distribute it,
891 # with or without modifications, as long as this notice is preserved.
892
893 # AM_SANITY_CHECK
894 # ---------------
895 AC_DEFUN([AM_SANITY_CHECK],
896 [AC_MSG_CHECKING([whether build environment is sane])
897 # Reject unsafe characters in $srcdir or the absolute working directory
898 # name. Accept space and tab only in the latter.
899 am_lf='
900 '
901 case `pwd` in
902 *[[\\\"\#\$\&\'\`$am_lf]]*)
903 AC_MSG_ERROR([unsafe absolute working directory name]);;
904 esac
905 case $srcdir in
906 *[[\\\"\#\$\&\'\`$am_lf\ \ ]]*)
907 AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
908 esac
909
910 # Do 'set' in a subshell so we don't clobber the current shell's
911 # arguments. Must try -L first in case configure is actually a
912 # symlink; some systems play weird games with the mod time of symlinks
913 # (eg FreeBSD returns the mod time of the symlink's containing
914 # directory).
915 if (
916 am_has_slept=no
917 for am_try in 1 2; do
918 echo "timestamp, slept: $am_has_slept" > conftest.file
919 set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
920 if test "$[*]" = "X"; then
921 # -L didn't work.
922 set X `ls -t "$srcdir/configure" conftest.file`
923 fi
924 if test "$[*]" != "X $srcdir/configure conftest.file" \
925 && test "$[*]" != "X conftest.file $srcdir/configure"; then
926
927 # If neither matched, then we have a broken ls. This can happen
928 # if, for instance, CONFIG_SHELL is bash and it inherits a
929 # broken ls alias from the environment. This has actually
930 # happened. Such a system could not be considered "sane".
931 AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
932 alias in your environment])
933 fi
934 if test "$[2]" = conftest.file || test $am_try -eq 2; then
935 break
936 fi
937 # Just in case.
938 sleep 1
939 am_has_slept=yes
940 done
941 test "$[2]" = conftest.file
942 )
943 then
944 # Ok.
945 :
946 else
947 AC_MSG_ERROR([newly created file is older than distributed files!
948 Check your system clock])
949 fi
950 AC_MSG_RESULT([yes])
951 # If we didn't sleep, we still need to ensure time stamps of config.status and
952 # generated files are strictly newer.
953 am_sleep_pid=
954 if grep 'slept: no' conftest.file >/dev/null 2>&1; then
955 ( sleep 1 ) &
956 am_sleep_pid=$!
957 fi
958 AC_CONFIG_COMMANDS_PRE(
959 [AC_MSG_CHECKING([that generated files are newer than configure])
960 if test -n "$am_sleep_pid"; then
961 # Hide warnings about reused PIDs.
962 wait $am_sleep_pid 2>/dev/null
963 fi
964 AC_MSG_RESULT([done])])
965 rm -f conftest.file
966 ])
967
968 # Copyright (C) 2009-2020 Free Software Foundation, Inc.
969 #
970 # This file is free software; the Free Software Foundation
971 # gives unlimited permission to copy and/or distribute it,
972 # with or without modifications, as long as this notice is preserved.
973
974 # AM_SILENT_RULES([DEFAULT])
975 # --------------------------
976 # Enable less verbose build rules; with the default set to DEFAULT
977 # ("yes" being less verbose, "no" or empty being verbose).
978 AC_DEFUN([AM_SILENT_RULES],
979 [AC_ARG_ENABLE([silent-rules], [dnl
980 AS_HELP_STRING(
981 [--enable-silent-rules],
982 [less verbose build output (undo: "make V=1")])
983 AS_HELP_STRING(
984 [--disable-silent-rules],
985 [verbose build output (undo: "make V=0")])dnl
986 ])
987 case $enable_silent_rules in @%:@ (((
988 yes) AM_DEFAULT_VERBOSITY=0;;
989 no) AM_DEFAULT_VERBOSITY=1;;
990 *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
991 esac
992 dnl
993 dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
994 dnl do not support nested variable expansions.
995 dnl See automake bug#9928 and bug#10237.
996 am_make=${MAKE-make}
997 AC_CACHE_CHECK([whether $am_make supports nested variables],
998 [am_cv_make_support_nested_variables],
999 [if AS_ECHO([['TRUE=$(BAR$(V))
1000 BAR0=false
1001 BAR1=true
1002 V=1
1003 am__doit:
1004 @$(TRUE)
1005 .PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
1006 am_cv_make_support_nested_variables=yes
1007 else
1008 am_cv_make_support_nested_variables=no
1009 fi])
1010 if test $am_cv_make_support_nested_variables = yes; then
1011 dnl Using '$V' instead of '$(V)' breaks IRIX make.
1012 AM_V='$(V)'
1013 AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
1014 else
1015 AM_V=$AM_DEFAULT_VERBOSITY
1016 AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
1017 fi
1018 AC_SUBST([AM_V])dnl
1019 AM_SUBST_NOTMAKE([AM_V])dnl
1020 AC_SUBST([AM_DEFAULT_V])dnl
1021 AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
1022 AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
1023 AM_BACKSLASH='\'
1024 AC_SUBST([AM_BACKSLASH])dnl
1025 _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
1026 ])
1027
1028 # Copyright (C) 2001-2020 Free Software Foundation, Inc.
1029 #
1030 # This file is free software; the Free Software Foundation
1031 # gives unlimited permission to copy and/or distribute it,
1032 # with or without modifications, as long as this notice is preserved.
1033
1034 # AM_PROG_INSTALL_STRIP
1035 # ---------------------
1036 # One issue with vendor 'install' (even GNU) is that you can't
1037 # specify the program used to strip binaries. This is especially
1038 # annoying in cross-compiling environments, where the build's strip
1039 # is unlikely to handle the host's binaries.
1040 # Fortunately install-sh will honor a STRIPPROG variable, so we
1041 # always use install-sh in "make install-strip", and initialize
1042 # STRIPPROG with the value of the STRIP variable (set by the user).
1043 AC_DEFUN([AM_PROG_INSTALL_STRIP],
1044 [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
1045 # Installed binaries are usually stripped using 'strip' when the user
1046 # run "make install-strip". However 'strip' might not be the right
1047 # tool to use in cross-compilation environments, therefore Automake
1048 # will honor the 'STRIP' environment variable to overrule this program.
1049 dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
1050 if test "$cross_compiling" != no; then
1051 AC_CHECK_TOOL([STRIP], [strip], :)
1052 fi
1053 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
1054 AC_SUBST([INSTALL_STRIP_PROGRAM])])
1055
1056 # Copyright (C) 2006-2020 Free Software Foundation, Inc.
1057 #
1058 # This file is free software; the Free Software Foundation
1059 # gives unlimited permission to copy and/or distribute it,
1060 # with or without modifications, as long as this notice is preserved.
1061
1062 # _AM_SUBST_NOTMAKE(VARIABLE)
1063 # ---------------------------
1064 # Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
1065 # This macro is traced by Automake.
1066 AC_DEFUN([_AM_SUBST_NOTMAKE])
1067
1068 # AM_SUBST_NOTMAKE(VARIABLE)
1069 # --------------------------
1070 # Public sister of _AM_SUBST_NOTMAKE.
1071 AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
1072
1073 # Check how to create a tarball. -*- Autoconf -*-
1074
1075 # Copyright (C) 2004-2020 Free Software Foundation, Inc.
1076 #
1077 # This file is free software; the Free Software Foundation
1078 # gives unlimited permission to copy and/or distribute it,
1079 # with or without modifications, as long as this notice is preserved.
1080
1081 # _AM_PROG_TAR(FORMAT)
1082 # --------------------
1083 # Check how to create a tarball in format FORMAT.
1084 # FORMAT should be one of 'v7', 'ustar', or 'pax'.
1085 #
1086 # Substitute a variable $(am__tar) that is a command
1087 # writing to stdout a FORMAT-tarball containing the directory
1088 # $tardir.
1089 # tardir=directory && $(am__tar) > result.tar
1090 #
1091 # Substitute a variable $(am__untar) that extract such
1092 # a tarball read from stdin.
1093 # $(am__untar) < result.tar
1094 #
1095 AC_DEFUN([_AM_PROG_TAR],
1096 [# Always define AMTAR for backward compatibility. Yes, it's still used
1097 # in the wild :-( We should find a proper way to deprecate it ...
1098 AC_SUBST([AMTAR], ['$${TAR-tar}'])
1099
1100 # We'll loop over all known methods to create a tar archive until one works.
1101 _am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
1102
1103 m4_if([$1], [v7],
1104 [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
1105
1106 [m4_case([$1],
1107 [ustar],
1108 [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
1109 # There is notably a 21 bits limit for the UID and the GID. In fact,
1110 # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
1111 # and bug#13588).
1112 am_max_uid=2097151 # 2^21 - 1
1113 am_max_gid=$am_max_uid
1114 # The $UID and $GID variables are not portable, so we need to resort
1115 # to the POSIX-mandated id(1) utility. Errors in the 'id' calls
1116 # below are definitely unexpected, so allow the users to see them
1117 # (that is, avoid stderr redirection).
1118 am_uid=`id -u || echo unknown`
1119 am_gid=`id -g || echo unknown`
1120 AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
1121 if test $am_uid -le $am_max_uid; then
1122 AC_MSG_RESULT([yes])
1123 else
1124 AC_MSG_RESULT([no])
1125 _am_tools=none
1126 fi
1127 AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
1128 if test $am_gid -le $am_max_gid; then
1129 AC_MSG_RESULT([yes])
1130 else
1131 AC_MSG_RESULT([no])
1132 _am_tools=none
1133 fi],
1134
1135 [pax],
1136 [],
1137
1138 [m4_fatal([Unknown tar format])])
1139
1140 AC_MSG_CHECKING([how to create a $1 tar archive])
1141
1142 # Go ahead even if we have the value already cached. We do so because we
1143 # need to set the values for the 'am__tar' and 'am__untar' variables.
1144 _am_tools=${am_cv_prog_tar_$1-$_am_tools}
1145
1146 for _am_tool in $_am_tools; do
1147 case $_am_tool in
1148 gnutar)
1149 for _am_tar in tar gnutar gtar; do
1150 AM_RUN_LOG([$_am_tar --version]) && break
1151 done
1152 am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
1153 am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
1154 am__untar="$_am_tar -xf -"
1155 ;;
1156 plaintar)
1157 # Must skip GNU tar: if it does not support --format= it doesn't create
1158 # ustar tarball either.
1159 (tar --version) >/dev/null 2>&1 && continue
1160 am__tar='tar chf - "$$tardir"'
1161 am__tar_='tar chf - "$tardir"'
1162 am__untar='tar xf -'
1163 ;;
1164 pax)
1165 am__tar='pax -L -x $1 -w "$$tardir"'
1166 am__tar_='pax -L -x $1 -w "$tardir"'
1167 am__untar='pax -r'
1168 ;;
1169 cpio)
1170 am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
1171 am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
1172 am__untar='cpio -i -H $1 -d'
1173 ;;
1174 none)
1175 am__tar=false
1176 am__tar_=false
1177 am__untar=false
1178 ;;
1179 esac
1180
1181 # If the value was cached, stop now. We just wanted to have am__tar
1182 # and am__untar set.
1183 test -n "${am_cv_prog_tar_$1}" && break
1184
1185 # tar/untar a dummy directory, and stop if the command works.
1186 rm -rf conftest.dir
1187 mkdir conftest.dir
1188 echo GrepMe > conftest.dir/file
1189 AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
1190 rm -rf conftest.dir
1191 if test -s conftest.tar; then
1192 AM_RUN_LOG([$am__untar <conftest.tar])
1193 AM_RUN_LOG([cat conftest.dir/file])
1194 grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
1195 fi
1196 done
1197 rm -rf conftest.dir
1198
1199 AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
1200 AC_MSG_RESULT([$am_cv_prog_tar_$1])])
1201
1202 AC_SUBST([am__tar])
1203 AC_SUBST([am__untar])
1204 ]) # _AM_PROG_TAR
1205
1206 m4_include([m4/ax_cxx_compile_stdcxx.m4])