ltconfig

优化后的JIF/JPEG压缩文件解码器

#! /bin/sh

# ltconfig - Create a system-specific libtool.
# Copyright (C) 1996-1998 Free Software Foundation, Inc.
# Gordon Matzigkeit <[e-mail]>, 1996
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that program.

# A lot of this script is taken from autoconf-2.10.

# The HP-UX ksh and POSIX shell print the target directory to stdout
# if CDPATH is set.
if test "${CDPATH+set}" = set; then CDPATH=; export CDPATH; fi

echo=echo
if test "X`($echo '\t') 2>/dev/null`" = 'X\t'; then :
else
  # The Solaris and AIX default echo program unquotes backslashes.
  # This makes it impossible to quote backslashes using
  #   echo "$something" | sed 's/\\/\\\\/g'
  # So, we emulate echo with printf '%s\n'
  echo="printf %s\\n"
  if test "X`($echo '\t') 2>/dev/null`" = 'X\t'; then :
  else
    # Oops.  We have no working printf.  Try to find a not-so-buggy echo.
    echo=echo
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    for dir in $PATH /usr/ucb; do
      if test -f $dir/echo && test "X`$dir/echo '\t'`" = 'X\t'; then
        echo="$dir/echo"
        break
      fi
    done
    IFS="$save_ifs"
  fi
fi

# Sed substitution that helps us do robust quoting.  It backslashifies
# metacharacters that are still active within double-quoted strings.
Xsed='sed -e s/^X//'
sed_quote_subst='s/\([\\"\\`$\\\\]\)/\\\1/g'

# Same as above, but do not quote variable references.
double_quote_subst='s/\([\\"\\`\\\\]\)/\\\1/g'

# The name of this program.
progname=`$echo "X$0" | $Xsed -e 's%^.*/%%'`

# Constants:
PROGRAM=ltconfig
PACKAGE=libtool
VERSION=1.2
ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.c 1>&5'
ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.c $LIBS 1>&5'
rm="rm -f"

help="Try \`$progname --help' for more information."

# Global variables:
can_build_shared=yes
enable_shared=yes
# All known linkers require a `.a' archive for static linking.
enable_static=yes
ltmain=
silent=
srcdir=
ac_config_guess=
ac_config_sub=
host=
nonopt=
verify_host=yes
with_gcc=no
with_gnu_ld=no

old_AR="$AR"
old_CC="$CC"
old_CFLAGS="$CFLAGS"
old_CPPFLAGS="$CPPFLAGS"
old_LD="$LD"
old_LN_S="$LN_S"
old_NM="$NM"
old_RANLIB="$RANLIB"

# Parse the command line options.
args=
prev=
for option
do
  case "$option" in
  -*=*) optarg=`echo "$option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
  *) optarg= ;;
  esac

  # If the previous option needs an argument, assign it.
  if test -n "$prev"; then
    eval "$prev=\$option"
    prev=
    continue
  fi

  case "$option" in
  --help) cat <<EOM
Usage: $progname [OPTION]... LTMAIN [HOST]

Generate a system-specific libtool script.

    --disable-shared       do not build shared libraries
    --disable-static       do not build static libraries
    --help                 display this help and exit
    --no-verify            do not verify that HOST is a valid host type
    --quiet                same as \`--silent'
    --silent               do not print informational messages
    --srcdir=DIR           find \`config.guess' in DIR
    --version              output version information and exit
    --with-gcc             assume that the GNU C compiler will be used
    --with-gnu-ld          assume that the C compiler uses the GNU linker

LTMAIN is the \`ltmain.sh' shell script fragment that provides basic libtool
functionality.

HOST is the canonical host system name [default=guessed].
EOM
  exit 0
  ;;

  --disable-shared) enable_shared=no ;;

  --disable-static) enable_static=no ;;

  --quiet | --silent) silent=yes ;;

  --srcdir) prev=srcdir ;;
  --srcdir=*) srcdir="$optarg" ;;

  --no-verify) verify_host=no ;;

  --version) echo "$PROGRAM (GNU $PACKAGE) $VERSION"; exit 0 ;;

  --with-gcc) with_gcc=yes ;;
  --with-gnu-ld) with_gnu_ld=yes ;;

  -*)
    echo "$progname: unrecognized option \`$option'" 1>&2
    echo "$help" 1>&2
    exit 1
    ;;

  *)
    if test -z "$ltmain"; then
      ltmain="$option"
    elif test -z "$host"; then
# This generates an unnecessary warning for sparc-sun-solaris4.1.3_U1
#      if test -n "`echo $option| sed 's/[-a-z0-9.]//g'`"; then
#        echo "$progname: warning \`$option' is not a valid host type" 1>&2
#      fi
      host="$option"
    else
      echo "$progname: too many arguments" 1>&2
      echo "$help" 1>&2
      exit 1
    fi ;;
  esac
done

if test -z "$ltmain"; then
  echo "$progname: you must specify a LTMAIN file" 1>&2
  echo "$help" 1>&2
  exit 1
fi

if test -f "$ltmain"; then :
else
  echo "$progname: \`$ltmain' does not exist" 1>&2
  echo "$help" 1>&2
  exit 1
fi

# Quote any args containing shell metacharacters.
ltconfig_args=
for arg
do
  case "$arg" in
  *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?]*)
  ltconfig_args="$ltconfig_args '$arg'" ;;
  *) ltconfig_args="$ltconfig_args $arg" ;;
  esac
done

# A relevant subset of AC_INIT.

# File descriptor usage:
# 0 standard input
# 1 file creation
# 2 errors and warnings
# 3 some systems may open it to /dev/tty
# 4 used on the Kubota Titan
# 5 compiler messages saved in config.log
# 6 checking for... messages and results
if test "$silent" = yes; then
  exec 6>/dev/null
else
  exec 6>&1
fi
exec 5>>./config.log

# NLS nuisances.
# Only set LANG and LC_ALL to C if already set.
# These must not be set unconditionally because not all systems understand
# e.g. LANG=C (notably SCO).
if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
if test "${LANG+set}"   = set; then LANG=C;   export LANG;   fi

if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
  # Stardent Vistra SVR4 grep lacks -e, says [e-mail].
  if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
    ac_n= ac_c='
' ac_t='	'
  else
    ac_n=-n ac_c= ac_t=
  fi
else
  ac_n= ac_c='\c' ac_t=
fi

if test -z "$srcdir"; then
  # Assume the source directory is the same one as the path to ltmain.sh.
  srcdir=`$echo "$ltmain" | $Xsed -e 's%/[^/]*$%%'`
  test "$srcdir" = "$ltmain" && srcdir=.
fi

trap "$rm conftest*; exit 1" 1 2 15
if test "$verify_host" = yes; then
  # Check for config.guess and config.sub.
  ac_aux_dir=
  for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
    if test -f $ac_dir/config.guess; then
      ac_aux_dir=$ac_dir
      break
    fi
  done
  if test -z "$ac_aux_dir"; then
    echo "$progname: cannot find config.guess in $srcdir $srcdir/.. $srcdir/../.." 1>&2
    echo "$help" 1>&2
    exit 1
  fi
  ac_config_guess=$ac_aux_dir/config.guess
  ac_config_sub=$ac_aux_dir/config.sub

  # Make sure we can run config.sub.
  if $ac_config_sub sun4 >/dev/null 2>&1; then :
  else
    echo "$progname: cannot run $ac_config_sub" 1>&2
    echo "$help" 1>&2
    exit 1
  fi

  echo $ac_n "checking host system type""... $ac_c" 1>&6

  host_alias=$host
  case "$host_alias" in
  "")
    if host_alias=`$ac_config_guess`; then :
    else
      echo "$progname: cannot guess host type; you must specify one" 1>&2
      echo "$help" 1>&2
      exit 1
    fi ;;
  esac
  host=`$ac_config_sub $host_alias`
  echo "$ac_t$host" 1>&6

  # Make sure the host verified.
  test -z "$host" && exit 1

elif test -z "$host"; then
  echo "$progname: you must specify a host type if you use \`--no-verify'" 1>&2
  echo "$help" 1>&2
  exit 1
else
  host_alias=$host
fi

# Transform linux* to *-*-linux-gnu*, to support old configure scripts.
case "$host_os" in
linux-gnu*) ;;
linux*) host=`echo $host | sed 's/^\(.*-.*-linux\)\(.*\)$/\1-gnu\2/'`
esac

host_cpu=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
host_vendor=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`

case "$host_os" in
aix3*)
  # AIX sometimes has problems with the GCC collect2 program.  For some
  # reason, if we set the COLLECT_NAMES environment variable, the problems
  # vanish in a puff of smoke.
  if test "${COLLECT_NAMES+set}" != set; then
    COLLECT_NAMES=
    export COLLECT_NAMES
  fi
  ;;
esac

# Determine commands to create old-style static archives.
old_archive_cmds='$AR cru $oldlib$oldobjs'
old_postinstall_cmds='chmod 644 $oldlib'
old_postuninstall_cmds=

# Set a sane default for `AR'.
test -z "$AR" && AR=ar

# If RANLIB is not set, then run the test.
if test "${RANLIB+set}" != "set"; then
  result=no

  echo $ac_n "checking for ranlib... $ac_c" 1>&6
  IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
  for dir in $PATH; do
    test -z "$dir" && dir=.
    if test -f $dir/ranlib; then
      RANLIB="ranlib"
      result="ranlib"
      break
    fi
  done
  IFS="$save_ifs"

  echo "$ac_t$result" 1>&6
fi

if test -n "$RANLIB"; then
  old_archive_cmds="$old_archive_cmds;\$RANLIB \$oldlib"
  old_postinstall_cmds="\$RANLIB \$oldlib;$old_postinstall_cmds"
fi

# Check to see if we are using GCC.
if test "$with_gcc" != yes || test -z "$CC"; then
  # If CC is not set, then try to find GCC or a usable CC.
  if test -z "$CC"; then
    echo $ac_n "checking for gcc... $ac_c" 1>&6
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    for dir in $PATH; do
      IFS="$save_ifs"
      test -z "$dir" && dir=.
      if test -f $dir/gcc; then
	CC="gcc"
	break
      fi
    done
    IFS="$save_ifs"

    if test -n "$CC"; then
      echo "$ac_t$CC" 1>&6
    else
      echo "$ac_t"no 1>&6
    fi
  fi

  # Not "gcc", so try "cc", rejecting "/usr/ucb/cc".
  if test -z "$CC"; then
    echo $ac_n "checking for cc... $ac_c" 1>&6
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    cc_rejected=no
    for dir in $PATH; do
      test -z "$dir" && dir=.
      if test -f $dir/cc; then
	if test "$dir/cc" = "/usr/ucb/cc"; then
	  cc_rejected=yes
	  continue
	fi
	CC="cc"
	break
      fi
    done
    IFS="$save_ifs"
    if test $cc_rejected = yes; then
      # We found a bogon in the path, so make sure we never use it.
      set dummy $CC
      shift
      if test $# -gt 0; then
	# We chose a different compiler from the bogus one.
	# However, it has the same name, so the bogon will be chosen
	# first if we set CC to just the name; use the full file name.
	shift
	set dummy "$dir/cc" "$@"
	shift
	CC="$@"
      fi
    fi

    if test -n "$CC"; then
      echo "$ac_t$CC" 1>&6
    else
      echo "$ac_t"no 1>&6
    fi

    if test -z "$CC"; then
      echo "$progname: error: no acceptable cc found in \$PATH" 1>&2
      exit 1
    fi
  fi

  # Now see if the compiler is really GCC.
  with_gcc=no
  echo $ac_n "checking whether we are using GNU C... $ac_c" 1>&6
  echo "$progname:424: checking whether we are using GNU C" >&5

  $rm conftest.c
  cat > conftest.c <<EOF
#ifdef __GNUC__
  yes;
#endif
EOF
  if { ac_try='${CC-cc} -E conftest.c'; { (eval echo $progname:432: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
    with_gcc=yes
  fi
  $rm conftest.c
  echo "$ac_t$with_gcc" 1>&6
fi

# Allow CC to be a program name with arguments.
set dummy $CC
compiler="$2"

echo $ac_n "checking for $compiler option to produce PIC... $ac_c" 1>&6
pic_flag=
special_shlib_compile_flags=
wl=
link_static_flag=
no_builtin_flag=

if test "$with_gcc" = yes; then
  wl='-Wl,'
  link_static_flag='-static'
  no_builtin_flag=' -fno-builtin'

  case "$host_os" in
  aix3* | aix4* | irix5* | irix6* | osf3* | osf4*)
    # PIC is the default for these OSes.
    ;;
  os2*)
    # We can build DLLs from non-PIC.
    ;;
  amigaos*)
    # FIXME: we need at least 68020 code to build shared libraries, but
    # adding the `-m68020' flag to GCC prevents building anything better,
    # like `-m68040'.
    pic_flag='-m68020 -resident32 -malways-restore-a4'
    ;;
  *)
    pic_flag='-fPIC'
    ;;
  esac
else
  # PORTME Check for PIC flags for the system compiler.
  case "$host_os" in
  aix3* | aix4*)
    # All AIX code is PIC.
    link_static_flag='-bnso -bI:/lib/syscalls.exp'
    ;;

  hpux9* | hpux10*)
    # Is there a better link_static_flag that works with the bundled CC?
    wl='-Wl,'
    link_static_flag="${wl}-a ${wl}archive"
    pic_flag='+Z'
    ;;

  irix5* | irix6*)
    wl='-Wl,'
    link_static_flag='-non_shared'
    # PIC (with -KPIC) is the default.
    ;;

  os2*)
    # We can build DLLs from non-PIC.
    ;;

  osf3* | osf4*)
    # All OSF/1 code is PIC.
    wl='-Wl,'
    link_static_flag='-non_shared'
    ;;

  sco3.2v5*)
    pic_flag='-Kpic'
    link_static_flag='-dn'