aclocal.m4@ 106877

Last change on this file since 106877 was 103316, checked in by vboxsync, 10 months ago
libpng-1.6.42: Applied and adjusted our libpng changes to 1.6.42. bugref:8515
Property svn:eol-style set to `native`
File size: 43.9 KB

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3	# Copyright (C) 1996-2021 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,
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511	AC_REQUIRE([AC_PROG_MKDIR_P])dnl
512	# For better backward compatibility. To be removed once Automake 1.9.x
513	# dies out for good. For more background, see:
514	# <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
515	# <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
516	AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
517	# We need awk for the "check" target (and possibly the TAP driver). The
518	# system "awk" is bad on some platforms.
519	AC_REQUIRE([AC_PROG_AWK])dnl
520	AC_REQUIRE([AC_PROG_MAKE_SET])dnl
521	AC_REQUIRE([AM_SET_LEADING_DOT])dnl
522	_AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
523	[_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
524	[_AM_PROG_TAR([v7])])])
525	_AM_IF_OPTION([no-dependencies],,
526	[AC_PROVIDE_IFELSE([AC_PROG_CC],
527	[_AM_DEPENDENCIES([CC])],
528	[m4_define([AC_PROG_CC],
529	m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
530	AC_PROVIDE_IFELSE([AC_PROG_CXX],
531	[_AM_DEPENDENCIES([CXX])],
532	[m4_define([AC_PROG_CXX],
533	m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
534	AC_PROVIDE_IFELSE([AC_PROG_OBJC],
535	[_AM_DEPENDENCIES([OBJC])],
536	[m4_define([AC_PROG_OBJC],
537	m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
538	AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
539	[_AM_DEPENDENCIES([OBJCXX])],
540	[m4_define([AC_PROG_OBJCXX],
541	m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
542	])
543	# Variables for tags utilities; see am/tags.am
544	if test -z "$CTAGS"; then
545	CTAGS=ctags
546	fi
547	AC_SUBST([CTAGS])
548	if test -z "$ETAGS"; then
549	ETAGS=etags
550	fi
551	AC_SUBST([ETAGS])
552	if test -z "$CSCOPE"; then
553	CSCOPE=cscope
554	fi
555	AC_SUBST([CSCOPE])
556
557	AC_REQUIRE([AM_SILENT_RULES])dnl
558	dnl The testsuite driver may need to know about EXEEXT, so add the
559	dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen. This
560	dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
561	AC_CONFIG_COMMANDS_PRE(dnl
562	[m4_provide_if([_AM_COMPILER_EXEEXT],
563	[AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
564
565	# POSIX will say in a future version that running "rm -f" with no argument
566	# is OK; and we want to be able to make that assumption in our Makefile
567	# recipes. So use an aggressive probe to check that the usage we want is
568	# actually supported "in the wild" to an acceptable degree.
569	# See automake bug#10828.
570	# To make any issue more visible, cause the running configure to be aborted
571	# by default if the 'rm' program in use doesn't match our expectations; the
572	# user can still override this though.
573	if rm -f && rm -fr && rm -rf; then : OK; else
574	cat >&2 <<'END'
575	Oops!
576
577	Your 'rm' program seems unable to run without file operands specified
578	on the command line, even when the '-f' option is present. This is contrary
579	to the behaviour of most rm programs out there, and not conforming with
580	the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
581
582	Please tell bug-automake@gnu.org about your system, including the value
583	of your $PATH and any error possibly output before this message. This
584	can help us improve future automake versions.
585
586	END
587	if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
588	echo 'Configuration will proceed anyway, since you have set the' >&2
589	echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
590	echo >&2
591	else
592	cat >&2 <<'END'
593	Aborting the configuration process, to ensure you take notice of the issue.
594
595	You can download and install GNU coreutils to get an 'rm' implementation
596	that behaves properly: <https://www.gnu.org/software/coreutils/>.
597
598	If you want to complete the configuration process using your problematic
599	'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
600	to "yes", and re-run configure.
601
602	END
603	AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
604	fi
605	fi
606	dnl The trailing newline in this macro's definition is deliberate, for
607	dnl backward compatibility and to allow trailing 'dnl'-style comments
608	dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
609	])
610
611	dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion. Do not
612	dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
613	dnl mangled by Autoconf and run in a shell conditional statement.
614	m4_define([_AC_COMPILER_EXEEXT],
615	m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
616
617	# When config.status generates a header, we must update the stamp-h file.
618	# This file resides in the same directory as the config header
619	# that is generated. The stamp files are numbered to have different names.
620
621	# Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
622	# loop where config.status creates the headers, so we can generate
623	# our stamp files there.
624	AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
625	[# Compute $1's index in $config_headers.
626	_am_arg=$1
627	_am_stamp_count=1
628	for _am_header in $config_headers :; do
629	case $_am_header in
630	$_am_arg \| $_am_arg:* )
631	break ;;
632	* )
633	_am_stamp_count=`expr $_am_stamp_count + 1` ;;
634	esac
635	done
636	echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
637
638	# Copyright (C) 2001-2021 Free Software Foundation, Inc.
639	#
640	# This file is free software; the Free Software Foundation
641	# gives unlimited permission to copy and/or distribute it,
642	# with or without modifications, as long as this notice is preserved.
643
644	# AM_PROG_INSTALL_SH
645	# ------------------
646	# Define $install_sh.
647	AC_DEFUN([AM_PROG_INSTALL_SH],
648	[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
649	if test x"${install_sh+set}" != xset; then
650	case $am_aux_dir in
651	\ \| \ )
652	install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
653	*)
654	install_sh="\${SHELL} $am_aux_dir/install-sh"
655	esac
656	fi
657	AC_SUBST([install_sh])])
658
659	# Copyright (C) 2003-2021 Free Software Foundation, Inc.
660	#
661	# This file is free software; the Free Software Foundation
662	# gives unlimited permission to copy and/or distribute it,
663	# with or without modifications, as long as this notice is preserved.
664
665	# Check whether the underlying file-system supports filenames
666	# with a leading dot. For instance MS-DOS doesn't.
667	AC_DEFUN([AM_SET_LEADING_DOT],
668	[rm -rf .tst 2>/dev/null
669	mkdir .tst 2>/dev/null
670	if test -d .tst; then
671	am__leading_dot=.
672	else
673	am__leading_dot=_
674	fi
675	rmdir .tst 2>/dev/null
676	AC_SUBST([am__leading_dot])])
677
678	# Add --enable-maintainer-mode option to configure. -- Autoconf --
679	# From Jim Meyering
680
681	# Copyright (C) 1996-2021 Free Software Foundation, Inc.
682	#
683	# This file is free software; the Free Software Foundation
684	# gives unlimited permission to copy and/or distribute it,
685	# with or without modifications, as long as this notice is preserved.
686
687	# AM_MAINTAINER_MODE([DEFAULT-MODE])
688	# ----------------------------------
689	# Control maintainer-specific portions of Makefiles.
690	# Default is to disable them, unless 'enable' is passed literally.
691	# For symmetry, 'disable' may be passed as well. Anyway, the user
692	# can override the default with the --enable/--disable switch.
693	AC_DEFUN([AM_MAINTAINER_MODE],
694	[m4_case(m4_default([$1], [disable]),
695	[enable], [m4_define([am_maintainer_other], [disable])],
696	[disable], [m4_define([am_maintainer_other], [enable])],
697	[m4_define([am_maintainer_other], [enable])
698	m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE: $1])])
699	AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
700	dnl maintainer-mode's default is 'disable' unless 'enable' is passed
701	AC_ARG_ENABLE([maintainer-mode],
702	[AS_HELP_STRING([--]am_maintainer_other[-maintainer-mode],
703	am_maintainer_other[ make rules and dependencies not useful
704	(and sometimes confusing) to the casual installer])],
705	[USE_MAINTAINER_MODE=$enableval],
706	[USE_MAINTAINER_MODE=]m4_if(am_maintainer_other, [enable], [no], [yes]))
707	AC_MSG_RESULT([$USE_MAINTAINER_MODE])
708	AM_CONDITIONAL([MAINTAINER_MODE], [test $USE_MAINTAINER_MODE = yes])
709	MAINT=$MAINTAINER_MODE_TRUE
710	AC_SUBST([MAINT])dnl
711	]
712	)
713
714	# Check to see how 'make' treats includes. -- Autoconf --
715
716	# Copyright (C) 2001-2021 Free Software Foundation, Inc.
717	#
718	# This file is free software; the Free Software Foundation
719	# gives unlimited permission to copy and/or distribute it,
720	# with or without modifications, as long as this notice is preserved.
721
722	# AM_MAKE_INCLUDE()
723	# -----------------
724	# Check whether make has an 'include' directive that can support all
725	# the idioms we need for our automatic dependency tracking code.
726	AC_DEFUN([AM_MAKE_INCLUDE],
727	[AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
728	cat > confinc.mk << 'END'
729	am__doit:
730	@echo this is the am__doit target >confinc.out
731	.PHONY: am__doit
732	END
733	am__include="#"
734	am__quote=
735	# BSD make does it like this.
736	echo '.include "confinc.mk" # ignored' > confmf.BSD
737	# Other make implementations (GNU, Solaris 10, AIX) do it like this.
738	echo 'include confinc.mk # ignored' > confmf.GNU
739	_am_result=no
740	for s in GNU BSD; do
741	AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
742	AS_CASE([$?:`cat confinc.out 2>/dev/null`],
743	['0:this is the am__doit target'],
744	[AS_CASE([$s],
745	[BSD], [am__include='.include' am__quote='"'],
746	[am__include='include' am__quote=''])])
747	if test "$am__include" != "#"; then
748	_am_result="yes ($s style)"
749	break
750	fi
751	done
752	rm -f confinc.* confmf.*
753	AC_MSG_RESULT([${_am_result}])
754	AC_SUBST([am__include])])
755	AC_SUBST([am__quote])])
756
757	# Fake the existence of programs that GNU maintainers use. -- Autoconf --
758
759	# Copyright (C) 1997-2021 Free Software Foundation, Inc.
760	#
761	# This file is free software; the Free Software Foundation
762	# gives unlimited permission to copy and/or distribute it,
763	# with or without modifications, as long as this notice is preserved.
764
765	# AM_MISSING_PROG(NAME, PROGRAM)
766	# ------------------------------
767	AC_DEFUN([AM_MISSING_PROG],
768	[AC_REQUIRE([AM_MISSING_HAS_RUN])
769	$1=${$1-"${am_missing_run}$2"}
770	AC_SUBST($1)])
771
772	# AM_MISSING_HAS_RUN
773	# ------------------
774	# Define MISSING if not defined so far and test if it is modern enough.
775	# If it is, set am_missing_run to use it, otherwise, to nothing.
776	AC_DEFUN([AM_MISSING_HAS_RUN],
777	[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
778	AC_REQUIRE_AUX_FILE([missing])dnl
779	if test x"${MISSING+set}" != xset; then
780	MISSING="\${SHELL} '$am_aux_dir/missing'"
781	fi
782	# Use eval to expand $SHELL
783	if eval "$MISSING --is-lightweight"; then
784	am_missing_run="$MISSING "
785	else
786	am_missing_run=
787	AC_MSG_WARN(['missing' script is too old or missing])
788	fi
789	])
790
791	# Helper functions for option handling. -- Autoconf --
792
793	# Copyright (C) 2001-2021 Free Software Foundation, Inc.
794	#
795	# This file is free software; the Free Software Foundation
796	# gives unlimited permission to copy and/or distribute it,
797	# with or without modifications, as long as this notice is preserved.
798
799	# _AM_MANGLE_OPTION(NAME)
800	# -----------------------
801	AC_DEFUN([_AM_MANGLE_OPTION],
802	[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
803
804	# _AM_SET_OPTION(NAME)
805	# --------------------
806	# Set option NAME. Presently that only means defining a flag for this option.
807	AC_DEFUN([_AM_SET_OPTION],
808	[m4_define(_AM_MANGLE_OPTION([$1]), [1])])
809
810	# _AM_SET_OPTIONS(OPTIONS)
811	# ------------------------
812	# OPTIONS is a space-separated list of Automake options.
813	AC_DEFUN([_AM_SET_OPTIONS],
814	[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
815
816	# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
817	# -------------------------------------------
818	# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
819	AC_DEFUN([_AM_IF_OPTION],
820	[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
821
822	# Copyright (C) 1999-2021 Free Software Foundation, Inc.
823	#
824	# This file is free software; the Free Software Foundation
825	# gives unlimited permission to copy and/or distribute it,
826	# with or without modifications, as long as this notice is preserved.
827
828	# _AM_PROG_CC_C_O
829	# ---------------
830	# Like AC_PROG_CC_C_O, but changed for automake. We rewrite AC_PROG_CC
831	# to automatically call this.
832	AC_DEFUN([_AM_PROG_CC_C_O],
833	[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
834	AC_REQUIRE_AUX_FILE([compile])dnl
835	AC_LANG_PUSH([C])dnl
836	AC_CACHE_CHECK(
837	[whether $CC understands -c and -o together],
838	[am_cv_prog_cc_c_o],
839	[AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
840	# Make sure it works both with $CC and with simple cc.
841	# Following AC_PROG_CC_C_O, we do the test twice because some
842	# compilers refuse to overwrite an existing .o file with -o,
843	# though they will create one.
844	am_cv_prog_cc_c_o=yes
845	for am_i in 1 2; do
846	if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
847	&& test -f conftest2.$ac_objext; then
848	: OK
849	else
850	am_cv_prog_cc_c_o=no
851	break
852	fi
853	done
854	rm -f core conftest*
855	unset am_i])
856	if test "$am_cv_prog_cc_c_o" != yes; then
857	# Losing compiler, so override with the script.
858	# FIXME: It is wrong to rewrite CC.
859	# But if we don't then we get into trouble of one sort or another.
860	# A longer-term fix would be to have automake use am__CC in this case,
861	# and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
862	CC="$am_aux_dir/compile $CC"
863	fi
864	AC_LANG_POP([C])])
865
866	# For backward compatibility.
867	AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
868
869	# Copyright (C) 2001-2021 Free Software Foundation, Inc.
870	#
871	# This file is free software; the Free Software Foundation
872	# gives unlimited permission to copy and/or distribute it,
873	# with or without modifications, as long as this notice is preserved.
874
875	# AM_RUN_LOG(COMMAND)
876	# -------------------
877	# Run COMMAND, save the exit status in ac_status, and log it.
878	# (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
879	AC_DEFUN([AM_RUN_LOG],
880	[{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
881	($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
882	ac_status=$?
883	echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
884	(exit $ac_status); }])
885
886	# Check to make sure that the build environment is sane. -- Autoconf --
887
888	# Copyright (C) 1996-2021 Free Software Foundation, Inc.
889	#
890	# This file is free software; the Free Software Foundation
891	# gives unlimited permission to copy and/or distribute it,
892	# with or without modifications, as long as this notice is preserved.
893
894	# AM_SANITY_CHECK
895	# ---------------
896	AC_DEFUN([AM_SANITY_CHECK],
897	[AC_MSG_CHECKING([whether build environment is sane])
898	# Reject unsafe characters in $srcdir or the absolute working directory
899	# name. Accept space and tab only in the latter.
900	am_lf='
901	'
902	case `pwd` in
903	[[\\\"\#\$\&\'\`$am_lf]])
904	AC_MSG_ERROR([unsafe absolute working directory name]);;
905	esac
906	case $srcdir in
907	[[\\\"\#\$\&\'\`$am_lf\ \ ]])
908	AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
909	esac
910
911	# Do 'set' in a subshell so we don't clobber the current shell's
912	# arguments. Must try -L first in case configure is actually a
913	# symlink; some systems play weird games with the mod time of symlinks
914	# (eg FreeBSD returns the mod time of the symlink's containing
915	# directory).
916	if (
917	am_has_slept=no
918	for am_try in 1 2; do
919	echo "timestamp, slept: $am_has_slept" > conftest.file
920	set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
921	if test "$[*]" = "X"; then
922	# -L didn't work.
923	set X `ls -t "$srcdir/configure" conftest.file`
924	fi
925	if test "$[*]" != "X $srcdir/configure conftest.file" \
926	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
927
928	# If neither matched, then we have a broken ls. This can happen
929	# if, for instance, CONFIG_SHELL is bash and it inherits a
930	# broken ls alias from the environment. This has actually
931	# happened. Such a system could not be considered "sane".
932	AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
933	alias in your environment])
934	fi
935	if test "$[2]" = conftest.file \|\| test $am_try -eq 2; then
936	break
937	fi
938	# Just in case.
939	sleep 1
940	am_has_slept=yes
941	done
942	test "$[2]" = conftest.file
943	)
944	then
945	# Ok.
946	:
947	else
948	AC_MSG_ERROR([newly created file is older than distributed files!
949	Check your system clock])
950	fi
951	AC_MSG_RESULT([yes])
952	# If we didn't sleep, we still need to ensure time stamps of config.status and
953	# generated files are strictly newer.
954	am_sleep_pid=
955	if grep 'slept: no' conftest.file >/dev/null 2>&1; then
956	( sleep 1 ) &
957	am_sleep_pid=$!
958	fi
959	AC_CONFIG_COMMANDS_PRE(
960	[AC_MSG_CHECKING([that generated files are newer than configure])
961	if test -n "$am_sleep_pid"; then
962	# Hide warnings about reused PIDs.
963	wait $am_sleep_pid 2>/dev/null
964	fi
965	AC_MSG_RESULT([done])])
966	rm -f conftest.file
967	])
968
969	# Copyright (C) 2009-2021 Free Software Foundation, Inc.
970	#
971	# This file is free software; the Free Software Foundation
972	# gives unlimited permission to copy and/or distribute it,
973	# with or without modifications, as long as this notice is preserved.
974
975	# AM_SILENT_RULES([DEFAULT])
976	# --------------------------
977	# Enable less verbose build rules; with the default set to DEFAULT
978	# ("yes" being less verbose, "no" or empty being verbose).
979	AC_DEFUN([AM_SILENT_RULES],
980	[AC_ARG_ENABLE([silent-rules], [dnl
981	AS_HELP_STRING(
982	[--enable-silent-rules],
983	[less verbose build output (undo: "make V=1")])
984	AS_HELP_STRING(
985	[--disable-silent-rules],
986	[verbose build output (undo: "make V=0")])dnl
987	])
988	case $enable_silent_rules in @%:@ (((
989	yes) AM_DEFAULT_VERBOSITY=0;;
990	no) AM_DEFAULT_VERBOSITY=1;;
991	*) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
992	esac
993	dnl
994	dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
995	dnl do not support nested variable expansions.
996	dnl See automake bug#9928 and bug#10237.
997	am_make=${MAKE-make}
998	AC_CACHE_CHECK([whether $am_make supports nested variables],
999	[am_cv_make_support_nested_variables],
1000	[if AS_ECHO([['TRUE=$(BAR$(V))
1001	BAR0=false
1002	BAR1=true
1003	V=1
1004	am__doit:
1005	@$(TRUE)
1006	.PHONY: am__doit']]) \| $am_make -f - >/dev/null 2>&1; then
1007	am_cv_make_support_nested_variables=yes
1008	else
1009	am_cv_make_support_nested_variables=no
1010	fi])
1011	if test $am_cv_make_support_nested_variables = yes; then
1012	dnl Using '$V' instead of '$(V)' breaks IRIX make.
1013	AM_V='$(V)'
1014	AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
1015	else
1016	AM_V=$AM_DEFAULT_VERBOSITY
1017	AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
1018	fi
1019	AC_SUBST([AM_V])dnl
1020	AM_SUBST_NOTMAKE([AM_V])dnl
1021	AC_SUBST([AM_DEFAULT_V])dnl
1022	AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
1023	AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
1024	AM_BACKSLASH='\'
1025	AC_SUBST([AM_BACKSLASH])dnl
1026	_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
1027	])
1028
1029	# Copyright (C) 2001-2021 Free Software Foundation, Inc.
1030	#
1031	# This file is free software; the Free Software Foundation
1032	# gives unlimited permission to copy and/or distribute it,
1033	# with or without modifications, as long as this notice is preserved.
1034
1035	# AM_PROG_INSTALL_STRIP
1036	# ---------------------
1037	# One issue with vendor 'install' (even GNU) is that you can't
1038	# specify the program used to strip binaries. This is especially
1039	# annoying in cross-compiling environments, where the build's strip
1040	# is unlikely to handle the host's binaries.
1041	# Fortunately install-sh will honor a STRIPPROG variable, so we
1042	# always use install-sh in "make install-strip", and initialize
1043	# STRIPPROG with the value of the STRIP variable (set by the user).
1044	AC_DEFUN([AM_PROG_INSTALL_STRIP],
1045	[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
1046	# Installed binaries are usually stripped using 'strip' when the user
1047	# run "make install-strip". However 'strip' might not be the right
1048	# tool to use in cross-compilation environments, therefore Automake
1049	# will honor the 'STRIP' environment variable to overrule this program.
1050	dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
1051	if test "$cross_compiling" != no; then
1052	AC_CHECK_TOOL([STRIP], [strip], :)
1053	fi
1054	INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
1055	AC_SUBST([INSTALL_STRIP_PROGRAM])])
1056
1057	# Copyright (C) 2006-2021 Free Software Foundation, Inc.
1058	#
1059	# This file is free software; the Free Software Foundation
1060	# gives unlimited permission to copy and/or distribute it,
1061	# with or without modifications, as long as this notice is preserved.
1062
1063	# _AM_SUBST_NOTMAKE(VARIABLE)
1064	# ---------------------------
1065	# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
1066	# This macro is traced by Automake.
1067	AC_DEFUN([_AM_SUBST_NOTMAKE])
1068
1069	# AM_SUBST_NOTMAKE(VARIABLE)
1070	# --------------------------
1071	# Public sister of _AM_SUBST_NOTMAKE.
1072	AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
1073
1074	# Check how to create a tarball. -- Autoconf --
1075
1076	# Copyright (C) 2004-2021 Free Software Foundation, Inc.
1077	#
1078	# This file is free software; the Free Software Foundation
1079	# gives unlimited permission to copy and/or distribute it,
1080	# with or without modifications, as long as this notice is preserved.
1081
1082	# _AM_PROG_TAR(FORMAT)
1083	# --------------------
1084	# Check how to create a tarball in format FORMAT.
1085	# FORMAT should be one of 'v7', 'ustar', or 'pax'.
1086	#
1087	# Substitute a variable $(am__tar) that is a command
1088	# writing to stdout a FORMAT-tarball containing the directory
1089	# $tardir.
1090	# tardir=directory && $(am__tar) > result.tar
1091	#
1092	# Substitute a variable $(am__untar) that extract such
1093	# a tarball read from stdin.
1094	# $(am__untar) < result.tar
1095	#
1096	AC_DEFUN([_AM_PROG_TAR],
1097	[# Always define AMTAR for backward compatibility. Yes, it's still used
1098	# in the wild :-( We should find a proper way to deprecate it ...
1099	AC_SUBST([AMTAR], ['$${TAR-tar}'])
1100
1101	# We'll loop over all known methods to create a tar archive until one works.
1102	_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
1103
1104	m4_if([$1], [v7],
1105	[am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
1106
1107	[m4_case([$1],
1108	[ustar],
1109	[# The POSIX 1988 'ustar' format is defined with fixed-size fields.
1110	# There is notably a 21 bits limit for the UID and the GID. In fact,
1111	# the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
1112	# and bug#13588).
1113	am_max_uid=2097151 # 2^21 - 1
1114	am_max_gid=$am_max_uid
1115	# The $UID and $GID variables are not portable, so we need to resort
1116	# to the POSIX-mandated id(1) utility. Errors in the 'id' calls
1117	# below are definitely unexpected, so allow the users to see them
1118	# (that is, avoid stderr redirection).
1119	am_uid=`id -u \|\| echo unknown`
1120	am_gid=`id -g \|\| echo unknown`
1121	AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
1122	if test $am_uid -le $am_max_uid; then
1123	AC_MSG_RESULT([yes])
1124	else
1125	AC_MSG_RESULT([no])
1126	_am_tools=none
1127	fi
1128	AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
1129	if test $am_gid -le $am_max_gid; then
1130	AC_MSG_RESULT([yes])
1131	else
1132	AC_MSG_RESULT([no])
1133	_am_tools=none
1134	fi],
1135
1136	[pax],
1137	[],
1138
1139	[m4_fatal([Unknown tar format])])
1140
1141	AC_MSG_CHECKING([how to create a $1 tar archive])
1142
1143	# Go ahead even if we have the value already cached. We do so because we
1144	# need to set the values for the 'am__tar' and 'am__untar' variables.
1145	_am_tools=${am_cv_prog_tar_$1-$_am_tools}
1146
1147	for _am_tool in $_am_tools; do
1148	case $_am_tool in
1149	gnutar)
1150	for _am_tar in tar gnutar gtar; do
1151	AM_RUN_LOG([$_am_tar --version]) && break
1152	done
1153	am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
1154	am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
1155	am__untar="$_am_tar -xf -"
1156	;;
1157	plaintar)
1158	# Must skip GNU tar: if it does not support --format= it doesn't create
1159	# ustar tarball either.
1160	(tar --version) >/dev/null 2>&1 && continue
1161	am__tar='tar chf - "$$tardir"'
1162	am__tar_='tar chf - "$tardir"'
1163	am__untar='tar xf -'
1164	;;
1165	pax)
1166	am__tar='pax -L -x $1 -w "$$tardir"'
1167	am__tar_='pax -L -x $1 -w "$tardir"'
1168	am__untar='pax -r'
1169	;;
1170	cpio)
1171	am__tar='find "$$tardir" -print \| cpio -o -H $1 -L'
1172	am__tar_='find "$tardir" -print \| cpio -o -H $1 -L'
1173	am__untar='cpio -i -H $1 -d'
1174	;;
1175	none)
1176	am__tar=false
1177	am__tar_=false
1178	am__untar=false
1179	;;
1180	esac
1181
1182	# If the value was cached, stop now. We just wanted to have am__tar
1183	# and am__untar set.
1184	test -n "${am_cv_prog_tar_$1}" && break
1185
1186	# tar/untar a dummy directory, and stop if the command works.
1187	rm -rf conftest.dir
1188	mkdir conftest.dir
1189	echo GrepMe > conftest.dir/file
1190	AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
1191	rm -rf conftest.dir
1192	if test -s conftest.tar; then
1193	AM_RUN_LOG([$am__untar <conftest.tar])
1194	AM_RUN_LOG([cat conftest.dir/file])
1195	grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
1196	fi
1197	done
1198	rm -rf conftest.dir
1199
1200	AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
1201	AC_MSG_RESULT([$am_cv_prog_tar_$1])])
1202
1203	AC_SUBST([am__tar])
1204	AC_SUBST([am__untar])
1205	]) # _AM_PROG_TAR
1206
1207	m4_include([scripts/autoconf/libtool.m4])
1208	m4_include([scripts/autoconf/ltoptions.m4])
1209	m4_include([scripts/autoconf/ltsugar.m4])
1210	m4_include([scripts/autoconf/ltversion.m4])
1211	m4_include([scripts/autoconf/lt~obsolete.m4])

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