aclocal.m4@ 78197

Last change on this file since 78197 was 76030, checked in by vboxsync, 6 years ago
libpng-1.6.36: properly export to OSE, and while at it fix EOL style for shell scripts
Property svn:eol-style set to `native`
File size: 43.4 KB

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1	# generated automatically by aclocal 1.16.1 -- Autoconf --
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3	# Copyright (C) 1996-2018 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
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23	# Copyright (C) 2002-2018 Free Software Foundation, Inc.
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353	# Generate code to set up dependency tracking. -- Autoconf --
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355	# Copyright (C) 1999-2018 Free Software Foundation, Inc.
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361	# _AM_OUTPUT_DEPENDENCY_COMMANDS
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419	# Do all the work for Automake. -- Autoconf --
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421	# Copyright (C) 1996-2018 Free Software Foundation, Inc.
422	#
423	# This file is free software; the Free Software Foundation
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427	# This macro actually does too much. Some checks are only needed if
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511	# We need awk for the "check" target (and possibly the TAP driver). The
512	# system "awk" is bad on some platforms.
513	AC_REQUIRE([AC_PROG_AWK])dnl
514	AC_REQUIRE([AC_PROG_MAKE_SET])dnl
515	AC_REQUIRE([AM_SET_LEADING_DOT])dnl
516	_AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
517	[_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
518	[_AM_PROG_TAR([v7])])])
519	_AM_IF_OPTION([no-dependencies],,
520	[AC_PROVIDE_IFELSE([AC_PROG_CC],
521	[_AM_DEPENDENCIES([CC])],
522	[m4_define([AC_PROG_CC],
523	m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
524	AC_PROVIDE_IFELSE([AC_PROG_CXX],
525	[_AM_DEPENDENCIES([CXX])],
526	[m4_define([AC_PROG_CXX],
527	m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
528	AC_PROVIDE_IFELSE([AC_PROG_OBJC],
529	[_AM_DEPENDENCIES([OBJC])],
530	[m4_define([AC_PROG_OBJC],
531	m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
532	AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
533	[_AM_DEPENDENCIES([OBJCXX])],
534	[m4_define([AC_PROG_OBJCXX],
535	m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
536	])
537	AC_REQUIRE([AM_SILENT_RULES])dnl
538	dnl The testsuite driver may need to know about EXEEXT, so add the
539	dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen. This
540	dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
541	AC_CONFIG_COMMANDS_PRE(dnl
542	[m4_provide_if([_AM_COMPILER_EXEEXT],
543	[AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
544
545	# POSIX will say in a future version that running "rm -f" with no argument
546	# is OK; and we want to be able to make that assumption in our Makefile
547	# recipes. So use an aggressive probe to check that the usage we want is
548	# actually supported "in the wild" to an acceptable degree.
549	# See automake bug#10828.
550	# To make any issue more visible, cause the running configure to be aborted
551	# by default if the 'rm' program in use doesn't match our expectations; the
552	# user can still override this though.
553	if rm -f && rm -fr && rm -rf; then : OK; else
554	cat >&2 <<'END'
555	Oops!
556
557	Your 'rm' program seems unable to run without file operands specified
558	on the command line, even when the '-f' option is present. This is contrary
559	to the behaviour of most rm programs out there, and not conforming with
560	the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
561
562	Please tell [email protected] about your system, including the value
563	of your $PATH and any error possibly output before this message. This
564	can help us improve future automake versions.
565
566	END
567	if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
568	echo 'Configuration will proceed anyway, since you have set the' >&2
569	echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
570	echo >&2
571	else
572	cat >&2 <<'END'
573	Aborting the configuration process, to ensure you take notice of the issue.
574
575	You can download and install GNU coreutils to get an 'rm' implementation
576	that behaves properly: <https://www.gnu.org/software/coreutils/>.
577
578	If you want to complete the configuration process using your problematic
579	'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
580	to "yes", and re-run configure.
581
582	END
583	AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
584	fi
585	fi
586	dnl The trailing newline in this macro's definition is deliberate, for
587	dnl backward compatibility and to allow trailing 'dnl'-style comments
588	dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
589	])
590
591	dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion. Do not
592	dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
593	dnl mangled by Autoconf and run in a shell conditional statement.
594	m4_define([_AC_COMPILER_EXEEXT],
595	m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
596
597	# When config.status generates a header, we must update the stamp-h file.
598	# This file resides in the same directory as the config header
599	# that is generated. The stamp files are numbered to have different names.
600
601	# Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
602	# loop where config.status creates the headers, so we can generate
603	# our stamp files there.
604	AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
605	[# Compute $1's index in $config_headers.
606	_am_arg=$1
607	_am_stamp_count=1
608	for _am_header in $config_headers :; do
609	case $_am_header in
610	$_am_arg \| $_am_arg:* )
611	break ;;
612	* )
613	_am_stamp_count=`expr $_am_stamp_count + 1` ;;
614	esac
615	done
616	echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
617
618	# Copyright (C) 2001-2018 Free Software Foundation, Inc.
619	#
620	# This file is free software; the Free Software Foundation
621	# gives unlimited permission to copy and/or distribute it,
622	# with or without modifications, as long as this notice is preserved.
623
624	# AM_PROG_INSTALL_SH
625	# ------------------
626	# Define $install_sh.
627	AC_DEFUN([AM_PROG_INSTALL_SH],
628	[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
629	if test x"${install_sh+set}" != xset; then
630	case $am_aux_dir in
631	\ \| \ )
632	install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
633	*)
634	install_sh="\${SHELL} $am_aux_dir/install-sh"
635	esac
636	fi
637	AC_SUBST([install_sh])])
638
639	# Copyright (C) 2003-2018 Free Software Foundation, Inc.
640	#
641	# This file is free software; the Free Software Foundation
642	# gives unlimited permission to copy and/or distribute it,
643	# with or without modifications, as long as this notice is preserved.
644
645	# Check whether the underlying file-system supports filenames
646	# with a leading dot. For instance MS-DOS doesn't.
647	AC_DEFUN([AM_SET_LEADING_DOT],
648	[rm -rf .tst 2>/dev/null
649	mkdir .tst 2>/dev/null
650	if test -d .tst; then
651	am__leading_dot=.
652	else
653	am__leading_dot=_
654	fi
655	rmdir .tst 2>/dev/null
656	AC_SUBST([am__leading_dot])])
657
658	# Add --enable-maintainer-mode option to configure. -- Autoconf --
659	# From Jim Meyering
660
661	# Copyright (C) 1996-2018 Free Software Foundation, Inc.
662	#
663	# This file is free software; the Free Software Foundation
664	# gives unlimited permission to copy and/or distribute it,
665	# with or without modifications, as long as this notice is preserved.
666
667	# AM_MAINTAINER_MODE([DEFAULT-MODE])
668	# ----------------------------------
669	# Control maintainer-specific portions of Makefiles.
670	# Default is to disable them, unless 'enable' is passed literally.
671	# For symmetry, 'disable' may be passed as well. Anyway, the user
672	# can override the default with the --enable/--disable switch.
673	AC_DEFUN([AM_MAINTAINER_MODE],
674	[m4_case(m4_default([$1], [disable]),
675	[enable], [m4_define([am_maintainer_other], [disable])],
676	[disable], [m4_define([am_maintainer_other], [enable])],
677	[m4_define([am_maintainer_other], [enable])
678	m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE: $1])])
679	AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
680	dnl maintainer-mode's default is 'disable' unless 'enable' is passed
681	AC_ARG_ENABLE([maintainer-mode],
682	[AS_HELP_STRING([--]am_maintainer_other[-maintainer-mode],
683	am_maintainer_other[ make rules and dependencies not useful
684	(and sometimes confusing) to the casual installer])],
685	[USE_MAINTAINER_MODE=$enableval],
686	[USE_MAINTAINER_MODE=]m4_if(am_maintainer_other, [enable], [no], [yes]))
687	AC_MSG_RESULT([$USE_MAINTAINER_MODE])
688	AM_CONDITIONAL([MAINTAINER_MODE], [test $USE_MAINTAINER_MODE = yes])
689	MAINT=$MAINTAINER_MODE_TRUE
690	AC_SUBST([MAINT])dnl
691	]
692	)
693
694	# Check to see how 'make' treats includes. -- Autoconf --
695
696	# Copyright (C) 2001-2018 Free Software Foundation, Inc.
697	#
698	# This file is free software; the Free Software Foundation
699	# gives unlimited permission to copy and/or distribute it,
700	# with or without modifications, as long as this notice is preserved.
701
702	# AM_MAKE_INCLUDE()
703	# -----------------
704	# Check whether make has an 'include' directive that can support all
705	# the idioms we need for our automatic dependency tracking code.
706	AC_DEFUN([AM_MAKE_INCLUDE],
707	[AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
708	cat > confinc.mk << 'END'
709	am__doit:
710	@echo this is the am__doit target >confinc.out
711	.PHONY: am__doit
712	END
713	am__include="#"
714	am__quote=
715	# BSD make does it like this.
716	echo '.include "confinc.mk" # ignored' > confmf.BSD
717	# Other make implementations (GNU, Solaris 10, AIX) do it like this.
718	echo 'include confinc.mk # ignored' > confmf.GNU
719	_am_result=no
720	for s in GNU BSD; do
721	AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
722	AS_CASE([$?:`cat confinc.out 2>/dev/null`],
723	['0:this is the am__doit target'],
724	[AS_CASE([$s],
725	[BSD], [am__include='.include' am__quote='"'],
726	[am__include='include' am__quote=''])])
727	if test "$am__include" != "#"; then
728	_am_result="yes ($s style)"
729	break
730	fi
731	done
732	rm -f confinc.* confmf.*
733	AC_MSG_RESULT([${_am_result}])
734	AC_SUBST([am__include])])
735	AC_SUBST([am__quote])])
736
737	# Fake the existence of programs that GNU maintainers use. -- Autoconf --
738
739	# Copyright (C) 1997-2018 Free Software Foundation, Inc.
740	#
741	# This file is free software; the Free Software Foundation
742	# gives unlimited permission to copy and/or distribute it,
743	# with or without modifications, as long as this notice is preserved.
744
745	# AM_MISSING_PROG(NAME, PROGRAM)
746	# ------------------------------
747	AC_DEFUN([AM_MISSING_PROG],
748	[AC_REQUIRE([AM_MISSING_HAS_RUN])
749	$1=${$1-"${am_missing_run}$2"}
750	AC_SUBST($1)])
751
752	# AM_MISSING_HAS_RUN
753	# ------------------
754	# Define MISSING if not defined so far and test if it is modern enough.
755	# If it is, set am_missing_run to use it, otherwise, to nothing.
756	AC_DEFUN([AM_MISSING_HAS_RUN],
757	[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
758	AC_REQUIRE_AUX_FILE([missing])dnl
759	if test x"${MISSING+set}" != xset; then
760	case $am_aux_dir in
761	\ \| \ )
762	MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
763	*)
764	MISSING="\${SHELL} $am_aux_dir/missing" ;;
765	esac
766	fi
767	# Use eval to expand $SHELL
768	if eval "$MISSING --is-lightweight"; then
769	am_missing_run="$MISSING "
770	else
771	am_missing_run=
772	AC_MSG_WARN(['missing' script is too old or missing])
773	fi
774	])
775
776	# Helper functions for option handling. -- Autoconf --
777
778	# Copyright (C) 2001-2018 Free Software Foundation, Inc.
779	#
780	# This file is free software; the Free Software Foundation
781	# gives unlimited permission to copy and/or distribute it,
782	# with or without modifications, as long as this notice is preserved.
783
784	# _AM_MANGLE_OPTION(NAME)
785	# -----------------------
786	AC_DEFUN([_AM_MANGLE_OPTION],
787	[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
788
789	# _AM_SET_OPTION(NAME)
790	# --------------------
791	# Set option NAME. Presently that only means defining a flag for this option.
792	AC_DEFUN([_AM_SET_OPTION],
793	[m4_define(_AM_MANGLE_OPTION([$1]), [1])])
794
795	# _AM_SET_OPTIONS(OPTIONS)
796	# ------------------------
797	# OPTIONS is a space-separated list of Automake options.
798	AC_DEFUN([_AM_SET_OPTIONS],
799	[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
800
801	# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
802	# -------------------------------------------
803	# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
804	AC_DEFUN([_AM_IF_OPTION],
805	[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
806
807	# Copyright (C) 1999-2018 Free Software Foundation, Inc.
808	#
809	# This file is free software; the Free Software Foundation
810	# gives unlimited permission to copy and/or distribute it,
811	# with or without modifications, as long as this notice is preserved.
812
813	# _AM_PROG_CC_C_O
814	# ---------------
815	# Like AC_PROG_CC_C_O, but changed for automake. We rewrite AC_PROG_CC
816	# to automatically call this.
817	AC_DEFUN([_AM_PROG_CC_C_O],
818	[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
819	AC_REQUIRE_AUX_FILE([compile])dnl
820	AC_LANG_PUSH([C])dnl
821	AC_CACHE_CHECK(
822	[whether $CC understands -c and -o together],
823	[am_cv_prog_cc_c_o],
824	[AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
825	# Make sure it works both with $CC and with simple cc.
826	# Following AC_PROG_CC_C_O, we do the test twice because some
827	# compilers refuse to overwrite an existing .o file with -o,
828	# though they will create one.
829	am_cv_prog_cc_c_o=yes
830	for am_i in 1 2; do
831	if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
832	&& test -f conftest2.$ac_objext; then
833	: OK
834	else
835	am_cv_prog_cc_c_o=no
836	break
837	fi
838	done
839	rm -f core conftest*
840	unset am_i])
841	if test "$am_cv_prog_cc_c_o" != yes; then
842	# Losing compiler, so override with the script.
843	# FIXME: It is wrong to rewrite CC.
844	# But if we don't then we get into trouble of one sort or another.
845	# A longer-term fix would be to have automake use am__CC in this case,
846	# and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
847	CC="$am_aux_dir/compile $CC"
848	fi
849	AC_LANG_POP([C])])
850
851	# For backward compatibility.
852	AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
853
854	# Copyright (C) 2001-2018 Free Software Foundation, Inc.
855	#
856	# This file is free software; the Free Software Foundation
857	# gives unlimited permission to copy and/or distribute it,
858	# with or without modifications, as long as this notice is preserved.
859
860	# AM_RUN_LOG(COMMAND)
861	# -------------------
862	# Run COMMAND, save the exit status in ac_status, and log it.
863	# (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
864	AC_DEFUN([AM_RUN_LOG],
865	[{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
866	($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
867	ac_status=$?
868	echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
869	(exit $ac_status); }])
870
871	# Check to make sure that the build environment is sane. -- Autoconf --
872
873	# Copyright (C) 1996-2018 Free Software Foundation, Inc.
874	#
875	# This file is free software; the Free Software Foundation
876	# gives unlimited permission to copy and/or distribute it,
877	# with or without modifications, as long as this notice is preserved.
878
879	# AM_SANITY_CHECK
880	# ---------------
881	AC_DEFUN([AM_SANITY_CHECK],
882	[AC_MSG_CHECKING([whether build environment is sane])
883	# Reject unsafe characters in $srcdir or the absolute working directory
884	# name. Accept space and tab only in the latter.
885	am_lf='
886	'
887	case `pwd` in
888	[[\\\"\#\$\&\'\`$am_lf]])
889	AC_MSG_ERROR([unsafe absolute working directory name]);;
890	esac
891	case $srcdir in
892	[[\\\"\#\$\&\'\`$am_lf\ \ ]])
893	AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
894	esac
895
896	# Do 'set' in a subshell so we don't clobber the current shell's
897	# arguments. Must try -L first in case configure is actually a
898	# symlink; some systems play weird games with the mod time of symlinks
899	# (eg FreeBSD returns the mod time of the symlink's containing
900	# directory).
901	if (
902	am_has_slept=no
903	for am_try in 1 2; do
904	echo "timestamp, slept: $am_has_slept" > conftest.file
905	set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
906	if test "$[*]" = "X"; then
907	# -L didn't work.
908	set X `ls -t "$srcdir/configure" conftest.file`
909	fi
910	if test "$[*]" != "X $srcdir/configure conftest.file" \
911	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
912
913	# If neither matched, then we have a broken ls. This can happen
914	# if, for instance, CONFIG_SHELL is bash and it inherits a
915	# broken ls alias from the environment. This has actually
916	# happened. Such a system could not be considered "sane".
917	AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
918	alias in your environment])
919	fi
920	if test "$[2]" = conftest.file \|\| test $am_try -eq 2; then
921	break
922	fi
923	# Just in case.
924	sleep 1
925	am_has_slept=yes
926	done
927	test "$[2]" = conftest.file
928	)
929	then
930	# Ok.
931	:
932	else
933	AC_MSG_ERROR([newly created file is older than distributed files!
934	Check your system clock])
935	fi
936	AC_MSG_RESULT([yes])
937	# If we didn't sleep, we still need to ensure time stamps of config.status and
938	# generated files are strictly newer.
939	am_sleep_pid=
940	if grep 'slept: no' conftest.file >/dev/null 2>&1; then
941	( sleep 1 ) &
942	am_sleep_pid=$!
943	fi
944	AC_CONFIG_COMMANDS_PRE(
945	[AC_MSG_CHECKING([that generated files are newer than configure])
946	if test -n "$am_sleep_pid"; then
947	# Hide warnings about reused PIDs.
948	wait $am_sleep_pid 2>/dev/null
949	fi
950	AC_MSG_RESULT([done])])
951	rm -f conftest.file
952	])
953
954	# Copyright (C) 2009-2018 Free Software Foundation, Inc.
955	#
956	# This file is free software; the Free Software Foundation
957	# gives unlimited permission to copy and/or distribute it,
958	# with or without modifications, as long as this notice is preserved.
959
960	# AM_SILENT_RULES([DEFAULT])
961	# --------------------------
962	# Enable less verbose build rules; with the default set to DEFAULT
963	# ("yes" being less verbose, "no" or empty being verbose).
964	AC_DEFUN([AM_SILENT_RULES],
965	[AC_ARG_ENABLE([silent-rules], [dnl
966	AS_HELP_STRING(
967	[--enable-silent-rules],
968	[less verbose build output (undo: "make V=1")])
969	AS_HELP_STRING(
970	[--disable-silent-rules],
971	[verbose build output (undo: "make V=0")])dnl
972	])
973	case $enable_silent_rules in @%:@ (((
974	yes) AM_DEFAULT_VERBOSITY=0;;
975	no) AM_DEFAULT_VERBOSITY=1;;
976	*) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
977	esac
978	dnl
979	dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
980	dnl do not support nested variable expansions.
981	dnl See automake bug#9928 and bug#10237.
982	am_make=${MAKE-make}
983	AC_CACHE_CHECK([whether $am_make supports nested variables],
984	[am_cv_make_support_nested_variables],
985	[if AS_ECHO([['TRUE=$(BAR$(V))
986	BAR0=false
987	BAR1=true
988	V=1
989	am__doit:
990	@$(TRUE)
991	.PHONY: am__doit']]) \| $am_make -f - >/dev/null 2>&1; then
992	am_cv_make_support_nested_variables=yes
993	else
994	am_cv_make_support_nested_variables=no
995	fi])
996	if test $am_cv_make_support_nested_variables = yes; then
997	dnl Using '$V' instead of '$(V)' breaks IRIX make.
998	AM_V='$(V)'
999	AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
1000	else
1001	AM_V=$AM_DEFAULT_VERBOSITY
1002	AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
1003	fi
1004	AC_SUBST([AM_V])dnl
1005	AM_SUBST_NOTMAKE([AM_V])dnl
1006	AC_SUBST([AM_DEFAULT_V])dnl
1007	AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
1008	AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
1009	AM_BACKSLASH='\'
1010	AC_SUBST([AM_BACKSLASH])dnl
1011	_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
1012	])
1013
1014	# Copyright (C) 2001-2018 Free Software Foundation, Inc.
1015	#
1016	# This file is free software; the Free Software Foundation
1017	# gives unlimited permission to copy and/or distribute it,
1018	# with or without modifications, as long as this notice is preserved.
1019
1020	# AM_PROG_INSTALL_STRIP
1021	# ---------------------
1022	# One issue with vendor 'install' (even GNU) is that you can't
1023	# specify the program used to strip binaries. This is especially
1024	# annoying in cross-compiling environments, where the build's strip
1025	# is unlikely to handle the host's binaries.
1026	# Fortunately install-sh will honor a STRIPPROG variable, so we
1027	# always use install-sh in "make install-strip", and initialize
1028	# STRIPPROG with the value of the STRIP variable (set by the user).
1029	AC_DEFUN([AM_PROG_INSTALL_STRIP],
1030	[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
1031	# Installed binaries are usually stripped using 'strip' when the user
1032	# run "make install-strip". However 'strip' might not be the right
1033	# tool to use in cross-compilation environments, therefore Automake
1034	# will honor the 'STRIP' environment variable to overrule this program.
1035	dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
1036	if test "$cross_compiling" != no; then
1037	AC_CHECK_TOOL([STRIP], [strip], :)
1038	fi
1039	INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
1040	AC_SUBST([INSTALL_STRIP_PROGRAM])])
1041
1042	# Copyright (C) 2006-2018 Free Software Foundation, Inc.
1043	#
1044	# This file is free software; the Free Software Foundation
1045	# gives unlimited permission to copy and/or distribute it,
1046	# with or without modifications, as long as this notice is preserved.
1047
1048	# _AM_SUBST_NOTMAKE(VARIABLE)
1049	# ---------------------------
1050	# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
1051	# This macro is traced by Automake.
1052	AC_DEFUN([_AM_SUBST_NOTMAKE])
1053
1054	# AM_SUBST_NOTMAKE(VARIABLE)
1055	# --------------------------
1056	# Public sister of _AM_SUBST_NOTMAKE.
1057	AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
1058
1059	# Check how to create a tarball. -- Autoconf --
1060
1061	# Copyright (C) 2004-2018 Free Software Foundation, Inc.
1062	#
1063	# This file is free software; the Free Software Foundation
1064	# gives unlimited permission to copy and/or distribute it,
1065	# with or without modifications, as long as this notice is preserved.
1066
1067	# _AM_PROG_TAR(FORMAT)
1068	# --------------------
1069	# Check how to create a tarball in format FORMAT.
1070	# FORMAT should be one of 'v7', 'ustar', or 'pax'.
1071	#
1072	# Substitute a variable $(am__tar) that is a command
1073	# writing to stdout a FORMAT-tarball containing the directory
1074	# $tardir.
1075	# tardir=directory && $(am__tar) > result.tar
1076	#
1077	# Substitute a variable $(am__untar) that extract such
1078	# a tarball read from stdin.
1079	# $(am__untar) < result.tar
1080	#
1081	AC_DEFUN([_AM_PROG_TAR],
1082	[# Always define AMTAR for backward compatibility. Yes, it's still used
1083	# in the wild :-( We should find a proper way to deprecate it ...
1084	AC_SUBST([AMTAR], ['$${TAR-tar}'])
1085
1086	# We'll loop over all known methods to create a tar archive until one works.
1087	_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
1088
1089	m4_if([$1], [v7],
1090	[am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
1091
1092	[m4_case([$1],
1093	[ustar],
1094	[# The POSIX 1988 'ustar' format is defined with fixed-size fields.
1095	# There is notably a 21 bits limit for the UID and the GID. In fact,
1096	# the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
1097	# and bug#13588).
1098	am_max_uid=2097151 # 2^21 - 1
1099	am_max_gid=$am_max_uid
1100	# The $UID and $GID variables are not portable, so we need to resort
1101	# to the POSIX-mandated id(1) utility. Errors in the 'id' calls
1102	# below are definitely unexpected, so allow the users to see them
1103	# (that is, avoid stderr redirection).
1104	am_uid=`id -u \|\| echo unknown`
1105	am_gid=`id -g \|\| echo unknown`
1106	AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
1107	if test $am_uid -le $am_max_uid; then
1108	AC_MSG_RESULT([yes])
1109	else
1110	AC_MSG_RESULT([no])
1111	_am_tools=none
1112	fi
1113	AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
1114	if test $am_gid -le $am_max_gid; then
1115	AC_MSG_RESULT([yes])
1116	else
1117	AC_MSG_RESULT([no])
1118	_am_tools=none
1119	fi],
1120
1121	[pax],
1122	[],
1123
1124	[m4_fatal([Unknown tar format])])
1125
1126	AC_MSG_CHECKING([how to create a $1 tar archive])
1127
1128	# Go ahead even if we have the value already cached. We do so because we
1129	# need to set the values for the 'am__tar' and 'am__untar' variables.
1130	_am_tools=${am_cv_prog_tar_$1-$_am_tools}
1131
1132	for _am_tool in $_am_tools; do
1133	case $_am_tool in
1134	gnutar)
1135	for _am_tar in tar gnutar gtar; do
1136	AM_RUN_LOG([$_am_tar --version]) && break
1137	done
1138	am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
1139	am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
1140	am__untar="$_am_tar -xf -"
1141	;;
1142	plaintar)
1143	# Must skip GNU tar: if it does not support --format= it doesn't create
1144	# ustar tarball either.
1145	(tar --version) >/dev/null 2>&1 && continue
1146	am__tar='tar chf - "$$tardir"'
1147	am__tar_='tar chf - "$tardir"'
1148	am__untar='tar xf -'
1149	;;
1150	pax)
1151	am__tar='pax -L -x $1 -w "$$tardir"'
1152	am__tar_='pax -L -x $1 -w "$tardir"'
1153	am__untar='pax -r'
1154	;;
1155	cpio)
1156	am__tar='find "$$tardir" -print \| cpio -o -H $1 -L'
1157	am__tar_='find "$tardir" -print \| cpio -o -H $1 -L'
1158	am__untar='cpio -i -H $1 -d'
1159	;;
1160	none)
1161	am__tar=false
1162	am__tar_=false
1163	am__untar=false
1164	;;
1165	esac
1166
1167	# If the value was cached, stop now. We just wanted to have am__tar
1168	# and am__untar set.
1169	test -n "${am_cv_prog_tar_$1}" && break
1170
1171	# tar/untar a dummy directory, and stop if the command works.
1172	rm -rf conftest.dir
1173	mkdir conftest.dir
1174	echo GrepMe > conftest.dir/file
1175	AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
1176	rm -rf conftest.dir
1177	if test -s conftest.tar; then
1178	AM_RUN_LOG([$am__untar <conftest.tar])
1179	AM_RUN_LOG([cat conftest.dir/file])
1180	grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
1181	fi
1182	done
1183	rm -rf conftest.dir
1184
1185	AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
1186	AC_MSG_RESULT([$am_cv_prog_tar_$1])])
1187
1188	AC_SUBST([am__tar])
1189	AC_SUBST([am__untar])
1190	]) # _AM_PROG_TAR
1191
1192	m4_include([scripts/libtool.m4])
1193	m4_include([scripts/ltoptions.m4])
1194	m4_include([scripts/ltsugar.m4])
1195	m4_include([scripts/ltversion.m4])
1196	m4_include([scripts/lt~obsolete.m4])

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source: vbox/trunk/src/libs/libpng-1.6.36/aclocal.m4@ 78197

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