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1 # generated automatically by aclocal 1.11.1 -*- Autoconf -*-
3 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 # 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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.
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.
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22 # Copyright (C) 2002, 2003, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
23 #
24 # This file is free software; the Free Software Foundation
25 # gives unlimited permission to copy and/or distribute it,
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60 # Copyright (C) 2001, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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136 # Free Software Foundation, Inc.
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138 # This file is free software; the Free Software Foundation
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169 # Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2009
170 # Free Software Foundation, Inc.
171 #
172 # This file is free software; the Free Software Foundation
173 # gives unlimited permission to copy and/or distribute it,
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434 # 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
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436 # This file is free software; the Free Software Foundation
437 # gives unlimited permission to copy and/or distribute it,
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440 # serial 16
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550 # This file resides in the same directory as the config header
551 # that is generated. The stamp files are numbered to have different names.
553 # Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
554 # loop where config.status creates the headers, so we can generate
555 # our stamp files there.
556 AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
557 [# Compute $1's index in $config_headers.
558 _am_arg=$1
559 _am_stamp_count=1
560 for _am_header in $config_headers :; do
561 case $_am_header in
562 $_am_arg | $_am_arg:* )
563 break ;;
564 * )
565 _am_stamp_count=`expr $_am_stamp_count + 1` ;;
566 esac
567 done
568 echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
570 # Copyright (C) 2001, 2003, 2005, 2008 Free Software Foundation, Inc.
571 #
572 # This file is free software; the Free Software Foundation
573 # gives unlimited permission to copy and/or distribute it,
574 # with or without modifications, as long as this notice is preserved.
576 # AM_PROG_INSTALL_SH
577 # ------------------
578 # Define $install_sh.
579 AC_DEFUN([AM_PROG_INSTALL_SH],
580 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
581 if test x"${install_sh}" != xset; then
582 case $am_aux_dir in
583 *\ * | *\ *)
584 install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
585 *)
586 install_sh="\${SHELL} $am_aux_dir/install-sh"
587 esac
588 fi
589 AC_SUBST(install_sh)])
591 # Copyright (C) 2003, 2005 Free Software Foundation, Inc.
592 #
593 # This file is free software; the Free Software Foundation
594 # gives unlimited permission to copy and/or distribute it,
595 # with or without modifications, as long as this notice is preserved.
597 # serial 2
599 # Check whether the underlying file-system supports filenames
600 # with a leading dot. For instance MS-DOS doesn't.
601 AC_DEFUN([AM_SET_LEADING_DOT],
602 [rm -rf .tst 2>/dev/null
603 mkdir .tst 2>/dev/null
604 if test -d .tst; then
605 am__leading_dot=.
606 else
607 am__leading_dot=_
608 fi
609 rmdir .tst 2>/dev/null
610 AC_SUBST([am__leading_dot])])
612 # Check to see how 'make' treats includes. -*- Autoconf -*-
614 # Copyright (C) 2001, 2002, 2003, 2005, 2009 Free Software Foundation, Inc.
615 #
616 # This file is free software; the Free Software Foundation
617 # gives unlimited permission to copy and/or distribute it,
618 # with or without modifications, as long as this notice is preserved.
620 # serial 4
622 # AM_MAKE_INCLUDE()
623 # -----------------
624 # Check to see how make treats includes.
625 AC_DEFUN([AM_MAKE_INCLUDE],
626 [am_make=${MAKE-make}
627 cat > confinc << 'END'
628 am__doit:
629 @echo this is the am__doit target
630 .PHONY: am__doit
631 END
632 # If we don't find an include directive, just comment out the code.
633 AC_MSG_CHECKING([for style of include used by $am_make])
634 am__include="#"
635 am__quote=
636 _am_result=none
637 # First try GNU make style include.
638 echo "include confinc" > confmf
639 # Ignore all kinds of additional output from `make'.
640 case `$am_make -s -f confmf 2> /dev/null` in #(
641 *the\ am__doit\ target*)
642 am__include=include
643 am__quote=
644 _am_result=GNU
645 ;;
646 esac
647 # Now try BSD make style include.
648 if test "$am__include" = "#"; then
649 echo '.include "confinc"' > confmf
650 case `$am_make -s -f confmf 2> /dev/null` in #(
651 *the\ am__doit\ target*)
652 am__include=.include
653 am__quote="\""
654 _am_result=BSD
655 ;;
656 esac
657 fi
658 AC_SUBST([am__include])
659 AC_SUBST([am__quote])
660 AC_MSG_RESULT([$_am_result])
661 rm -f confinc confmf
662 ])
664 # Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2008
665 # Free Software Foundation, Inc.
666 #
667 # This file is free software; the Free Software Foundation
668 # gives unlimited permission to copy and/or distribute it,
669 # with or without modifications, as long as this notice is preserved.
671 # serial 6
673 # AM_PROG_CC_C_O
674 # --------------
675 # Like AC_PROG_CC_C_O, but changed for automake.
676 AC_DEFUN([AM_PROG_CC_C_O],
677 [AC_REQUIRE([AC_PROG_CC_C_O])dnl
678 AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
679 AC_REQUIRE_AUX_FILE([compile])dnl
680 # FIXME: we rely on the cache variable name because
681 # there is no other way.
682 set dummy $CC
683 am_cc=`echo $[2] | sed ['s/[^a-zA-Z0-9_]/_/g;s/^[0-9]/_/']`
684 eval am_t=\$ac_cv_prog_cc_${am_cc}_c_o
685 if test "$am_t" != yes; then
686 # Losing compiler, so override with the script.
687 # FIXME: It is wrong to rewrite CC.
688 # But if we don't then we get into trouble of one sort or another.
689 # A longer-term fix would be to have automake use am__CC in this case,
690 # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
691 CC="$am_aux_dir/compile $CC"
692 fi
693 dnl Make sure AC_PROG_CC is never called again, or it will override our
694 dnl setting of CC.
695 m4_define([AC_PROG_CC],
696 [m4_fatal([AC_PROG_CC cannot be called after AM_PROG_CC_C_O])])
697 ])
699 # Fake the existence of programs that GNU maintainers use. -*- Autoconf -*-
701 # Copyright (C) 1997, 1999, 2000, 2001, 2003, 2004, 2005, 2008
702 # Free Software Foundation, Inc.
703 #
704 # This file is free software; the Free Software Foundation
705 # gives unlimited permission to copy and/or distribute it,
706 # with or without modifications, as long as this notice is preserved.
708 # serial 6
710 # AM_MISSING_PROG(NAME, PROGRAM)
711 # ------------------------------
712 AC_DEFUN([AM_MISSING_PROG],
713 [AC_REQUIRE([AM_MISSING_HAS_RUN])
714 $1=${$1-"${am_missing_run}$2"}
715 AC_SUBST($1)])
718 # AM_MISSING_HAS_RUN
719 # ------------------
720 # Define MISSING if not defined so far and test if it supports --run.
721 # If it does, set am_missing_run to use it, otherwise, to nothing.
722 AC_DEFUN([AM_MISSING_HAS_RUN],
723 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
724 AC_REQUIRE_AUX_FILE([missing])dnl
725 if test x"${MISSING+set}" != xset; then
726 case $am_aux_dir in
727 *\ * | *\ *)
728 MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
729 *)
730 MISSING="\${SHELL} $am_aux_dir/missing" ;;
731 esac
732 fi
733 # Use eval to expand $SHELL
734 if eval "$MISSING --run true"; then
735 am_missing_run="$MISSING --run "
736 else
737 am_missing_run=
738 AC_MSG_WARN([`missing' script is too old or missing])
739 fi
740 ])
742 # Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
743 #
744 # This file is free software; the Free Software Foundation
745 # gives unlimited permission to copy and/or distribute it,
746 # with or without modifications, as long as this notice is preserved.
748 # AM_PROG_MKDIR_P
749 # ---------------
750 # Check for `mkdir -p'.
751 AC_DEFUN([AM_PROG_MKDIR_P],
752 [AC_PREREQ([2.60])dnl
753 AC_REQUIRE([AC_PROG_MKDIR_P])dnl
754 dnl Automake 1.8 to 1.9.6 used to define mkdir_p. We now use MKDIR_P,
755 dnl while keeping a definition of mkdir_p for backward compatibility.
756 dnl @MKDIR_P@ is magic: AC_OUTPUT adjusts its value for each Makefile.
757 dnl However we cannot define mkdir_p as $(MKDIR_P) for the sake of
758 dnl Makefile.ins that do not define MKDIR_P, so we do our own
759 dnl adjustment using top_builddir (which is defined more often than
760 dnl MKDIR_P).
761 AC_SUBST([mkdir_p], ["$MKDIR_P"])dnl
762 case $mkdir_p in
763 [[\\/$]]* | ?:[[\\/]]*) ;;
764 */*) mkdir_p="\$(top_builddir)/$mkdir_p" ;;
765 esac
766 ])
768 # Helper functions for option handling. -*- Autoconf -*-
770 # Copyright (C) 2001, 2002, 2003, 2005, 2008 Free Software Foundation, Inc.
771 #
772 # This file is free software; the Free Software Foundation
773 # gives unlimited permission to copy and/or distribute it,
774 # with or without modifications, as long as this notice is preserved.
776 # serial 4
778 # _AM_MANGLE_OPTION(NAME)
779 # -----------------------
780 AC_DEFUN([_AM_MANGLE_OPTION],
781 [[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
783 # _AM_SET_OPTION(NAME)
784 # ------------------------------
785 # Set option NAME. Presently that only means defining a flag for this option.
786 AC_DEFUN([_AM_SET_OPTION],
787 [m4_define(_AM_MANGLE_OPTION([$1]), 1)])
789 # _AM_SET_OPTIONS(OPTIONS)
790 # ----------------------------------
791 # OPTIONS is a space-separated list of Automake options.
792 AC_DEFUN([_AM_SET_OPTIONS],
793 [m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
795 # _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
796 # -------------------------------------------
797 # Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
798 AC_DEFUN([_AM_IF_OPTION],
799 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
801 # Check to make sure that the build environment is sane. -*- Autoconf -*-
803 # Copyright (C) 1996, 1997, 2000, 2001, 2003, 2005, 2008
804 # Free Software Foundation, Inc.
805 #
806 # This file is free software; the Free Software Foundation
807 # gives unlimited permission to copy and/or distribute it,
808 # with or without modifications, as long as this notice is preserved.
810 # serial 5
812 # AM_SANITY_CHECK
813 # ---------------
814 AC_DEFUN([AM_SANITY_CHECK],
815 [AC_MSG_CHECKING([whether build environment is sane])
816 # Just in case
817 sleep 1
818 echo timestamp > conftest.file
819 # Reject unsafe characters in $srcdir or the absolute working directory
820 # name. Accept space and tab only in the latter.
821 am_lf='
822 '
823 case `pwd` in
824 *[[\\\"\#\$\&\'\`$am_lf]]*)
825 AC_MSG_ERROR([unsafe absolute working directory name]);;
826 esac
827 case $srcdir in
828 *[[\\\"\#\$\&\'\`$am_lf\ \ ]]*)
829 AC_MSG_ERROR([unsafe srcdir value: `$srcdir']);;
830 esac
832 # Do `set' in a subshell so we don't clobber the current shell's
833 # arguments. Must try -L first in case configure is actually a
834 # symlink; some systems play weird games with the mod time of symlinks
835 # (eg FreeBSD returns the mod time of the symlink's containing
836 # directory).
837 if (
838 set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
839 if test "$[*]" = "X"; then
840 # -L didn't work.
841 set X `ls -t "$srcdir/configure" conftest.file`
842 fi
843 rm -f conftest.file
844 if test "$[*]" != "X $srcdir/configure conftest.file" \
845 && test "$[*]" != "X conftest.file $srcdir/configure"; then
847 # If neither matched, then we have a broken ls. This can happen
848 # if, for instance, CONFIG_SHELL is bash and it inherits a
849 # broken ls alias from the environment. This has actually
850 # happened. Such a system could not be considered "sane".
851 AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
852 alias in your environment])
853 fi
855 test "$[2]" = conftest.file
856 )
857 then
858 # Ok.
859 :
860 else
861 AC_MSG_ERROR([newly created file is older than distributed files!
862 Check your system clock])
863 fi
864 AC_MSG_RESULT(yes)])
866 # Copyright (C) 2001, 2003, 2005 Free Software Foundation, Inc.
867 #
868 # This file is free software; the Free Software Foundation
869 # gives unlimited permission to copy and/or distribute it,
870 # with or without modifications, as long as this notice is preserved.
872 # AM_PROG_INSTALL_STRIP
873 # ---------------------
874 # One issue with vendor `install' (even GNU) is that you can't
875 # specify the program used to strip binaries. This is especially
876 # annoying in cross-compiling environments, where the build's strip
877 # is unlikely to handle the host's binaries.
878 # Fortunately install-sh will honor a STRIPPROG variable, so we
879 # always use install-sh in `make install-strip', and initialize
880 # STRIPPROG with the value of the STRIP variable (set by the user).
881 AC_DEFUN([AM_PROG_INSTALL_STRIP],
882 [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
883 # Installed binaries are usually stripped using `strip' when the user
884 # run `make install-strip'. However `strip' might not be the right
885 # tool to use in cross-compilation environments, therefore Automake
886 # will honor the `STRIP' environment variable to overrule this program.
887 dnl Don't test for $cross_compiling = yes, because it might be `maybe'.
888 if test "$cross_compiling" != no; then
889 AC_CHECK_TOOL([STRIP], [strip], :)
890 fi
891 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
892 AC_SUBST([INSTALL_STRIP_PROGRAM])])
894 # Copyright (C) 2006, 2008 Free Software Foundation, Inc.
895 #
896 # This file is free software; the Free Software Foundation
897 # gives unlimited permission to copy and/or distribute it,
898 # with or without modifications, as long as this notice is preserved.
900 # serial 2
902 # _AM_SUBST_NOTMAKE(VARIABLE)
903 # ---------------------------
904 # Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
905 # This macro is traced by Automake.
906 AC_DEFUN([_AM_SUBST_NOTMAKE])
908 # AM_SUBST_NOTMAKE(VARIABLE)
909 # ---------------------------
910 # Public sister of _AM_SUBST_NOTMAKE.
911 AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
913 # Check how to create a tarball. -*- Autoconf -*-
915 # Copyright (C) 2004, 2005 Free Software Foundation, Inc.
916 #
917 # This file is free software; the Free Software Foundation
918 # gives unlimited permission to copy and/or distribute it,
919 # with or without modifications, as long as this notice is preserved.
921 # serial 2
923 # _AM_PROG_TAR(FORMAT)
924 # --------------------
925 # Check how to create a tarball in format FORMAT.
926 # FORMAT should be one of `v7', `ustar', or `pax'.
927 #
928 # Substitute a variable $(am__tar) that is a command
929 # writing to stdout a FORMAT-tarball containing the directory
930 # $tardir.
931 # tardir=directory && $(am__tar) > result.tar
932 #
933 # Substitute a variable $(am__untar) that extract such
934 # a tarball read from stdin.
935 # $(am__untar) < result.tar
936 AC_DEFUN([_AM_PROG_TAR],
937 [# Always define AMTAR for backward compatibility.
938 AM_MISSING_PROG([AMTAR], [tar])
939 m4_if([$1], [v7],
940 [am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'],
941 [m4_case([$1], [ustar],, [pax],,
942 [m4_fatal([Unknown tar format])])
943 AC_MSG_CHECKING([how to create a $1 tar archive])
944 # Loop over all known methods to create a tar archive until one works.
945 _am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
946 _am_tools=${am_cv_prog_tar_$1-$_am_tools}
947 # Do not fold the above two line into one, because Tru64 sh and
948 # Solaris sh will not grok spaces in the rhs of `-'.
949 for _am_tool in $_am_tools
950 do
951 case $_am_tool in
952 gnutar)
953 for _am_tar in tar gnutar gtar;
954 do
955 AM_RUN_LOG([$_am_tar --version]) && break
956 done
957 am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
958 am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
959 am__untar="$_am_tar -xf -"
960 ;;
961 plaintar)
962 # Must skip GNU tar: if it does not support --format= it doesn't create
963 # ustar tarball either.
964 (tar --version) >/dev/null 2>&1 && continue
965 am__tar='tar chf - "$$tardir"'
966 am__tar_='tar chf - "$tardir"'
967 am__untar='tar xf -'
968 ;;
969 pax)
970 am__tar='pax -L -x $1 -w "$$tardir"'
971 am__tar_='pax -L -x $1 -w "$tardir"'
972 am__untar='pax -r'
973 ;;
974 cpio)
975 am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
976 am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
977 am__untar='cpio -i -H $1 -d'
978 ;;
979 none)
980 am__tar=false
981 am__tar_=false
982 am__untar=false
983 ;;
984 esac
986 # If the value was cached, stop now. We just wanted to have am__tar
987 # and am__untar set.
988 test -n "${am_cv_prog_tar_$1}" && break
990 # tar/untar a dummy directory, and stop if the command works
991 rm -rf conftest.dir
992 mkdir conftest.dir
993 echo GrepMe > conftest.dir/file
994 AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
995 rm -rf conftest.dir
996 if test -s conftest.tar; then
997 AM_RUN_LOG([$am__untar <conftest.tar])
998 grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
999 fi
1000 done
1001 rm -rf conftest.dir
1003 AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
1004 AC_MSG_RESULT([$am_cv_prog_tar_$1])])
1005 AC_SUBST([am__tar])
1006 AC_SUBST([am__untar])
1007 ]) # _AM_PROG_TAR
1009 m4_include([m4/00gnulib.m4])
1010 m4_include([m4/alloca.m4])
1011 m4_include([m4/argp.m4])
1012 m4_include([m4/asm-underscore.m4])
1013 m4_include([m4/btowc.m4])
1014 m4_include([m4/codeset.m4])
1015 m4_include([m4/dirname.m4])
1016 m4_include([m4/dos.m4])
1017 m4_include([m4/double-slash-root.m4])
1018 m4_include([m4/errno_h.m4])
1019 m4_include([m4/error.m4])
1020 m4_include([m4/extensions.m4])
1021 m4_include([m4/fcntl-o.m4])
1022 m4_include([m4/float_h.m4])
1023 m4_include([m4/fnmatch.m4])
1024 m4_include([m4/getdelim.m4])
1025 m4_include([m4/getline.m4])
1026 m4_include([m4/getopt.m4])
1027 m4_include([m4/gettext.m4])
1028 m4_include([m4/glibc21.m4])
1029 m4_include([m4/gnulib-common.m4])
1030 m4_include([m4/gnulib-comp.m4])
1031 m4_include([m4/iconv.m4])
1032 m4_include([m4/include_next.m4])
1033 m4_include([m4/intlmacosx.m4])
1034 m4_include([m4/intmax_t.m4])
1035 m4_include([m4/inttypes_h.m4])
1036 m4_include([m4/langinfo_h.m4])
1037 m4_include([m4/lib-ld.m4])
1038 m4_include([m4/lib-link.m4])
1039 m4_include([m4/lib-prefix.m4])
1040 m4_include([m4/localcharset.m4])
1041 m4_include([m4/locale-fr.m4])
1042 m4_include([m4/locale-ja.m4])
1043 m4_include([m4/locale-zh.m4])
1044 m4_include([m4/longlong.m4])
1045 m4_include([m4/malloc.m4])
1046 m4_include([m4/mbrtowc.m4])
1047 m4_include([m4/mbsinit.m4])
1048 m4_include([m4/mbsrtowcs.m4])
1049 m4_include([m4/mbstate_t.m4])
1050 m4_include([m4/memchr.m4])
1051 m4_include([m4/mempcpy.m4])
1052 m4_include([m4/mmap-anon.m4])
1053 m4_include([m4/multiarch.m4])
1054 m4_include([m4/nl_langinfo.m4])
1055 m4_include([m4/nls.m4])
1056 m4_include([m4/po.m4])
1057 m4_include([m4/printf.m4])
1058 m4_include([m4/progtest.m4])
1059 m4_include([m4/rawmemchr.m4])
1060 m4_include([m4/realloc.m4])
1061 m4_include([m4/regex.m4])
1062 m4_include([m4/size_max.m4])
1063 m4_include([m4/sleep.m4])
1064 m4_include([m4/ssize_t.m4])
1065 m4_include([m4/stdbool.m4])
1066 m4_include([m4/stddef_h.m4])
1067 m4_include([m4/stdint.m4])
1068 m4_include([m4/stdint_h.m4])
1069 m4_include([m4/stdio_h.m4])
1070 m4_include([m4/stdlib_h.m4])
1071 m4_include([m4/strcase.m4])
1072 m4_include([m4/strchrnul.m4])
1073 m4_include([m4/strerror.m4])
1074 m4_include([m4/string_h.m4])
1075 m4_include([m4/strings_h.m4])
1076 m4_include([m4/strndup.m4])
1077 m4_include([m4/strnlen.m4])
1078 m4_include([m4/sys_wait_h.m4])
1079 m4_include([m4/sysexits.m4])
1080 m4_include([m4/unistd_h.m4])
1081 m4_include([m4/vasnprintf.m4])
1082 m4_include([m4/vsnprintf.m4])
1083 m4_include([m4/warn-on-use.m4])
1084 m4_include([m4/wchar_h.m4])
1085 m4_include([m4/wchar_t.m4])
1086 m4_include([m4/wcrtomb.m4])
1087 m4_include([m4/wctype_h.m4])
1088 m4_include([m4/wint_t.m4])
1089 m4_include([m4/xsize.m4])
1090 m4_include([acinclude.m4])