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config.rpath：源码内容
							#! /bin/sh
# Output a system dependent set of variables, describing how to set the
# run time search path of shared libraries in an executable.
#
#   Copyright 1996-2002 Free Software Foundation, Inc.
#   Taken from GNU libtool, 2001
#   Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
#
#   This program 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.
#
# The first argument passed to this file is the canonical host specification,
#    CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
# or
#    CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
# The environment variables CC, GCC, LDFLAGS, LD, with_gnu_ld
# should be set by the caller.
#
# The set of defined variables is at the end of this script.
# All known linkers require a `.a' archive for static linking (except M$VC,
# which needs '.lib').
libext=a
shlibext=
host="$1"
host_cpu=`echo "$host" | sed 's/^([^-]*)-([^-]*)-(.*)$/1/'`
host_vendor=`echo "$host" | sed 's/^([^-]*)-([^-]*)-(.*)$/2/'`
host_os=`echo "$host" | sed 's/^([^-]*)-([^-]*)-(.*)$/3/'`
wl=
if test "$GCC" = yes; then
  wl='-Wl,'
else
  case "$host_os" in
    aix3* | aix4* | aix5*)
      wl='-Wl,'
      ;;
    hpux9* | hpux10* | hpux11*)
      wl='-Wl,'
      ;;
    irix5* | irix6*)
      wl='-Wl,'
      ;;
    linux*)
      echo '__INTEL_COMPILER' > conftest.$ac_ext
      if $CC -E conftest.$ac_ext >/dev/null | grep __INTEL_COMPILER >/dev/null
      then
        :
      else
        # Intel icc
        wl='-Qoption,ld,'
      fi
      ;;
    osf3* | osf4* | osf5*)
      wl='-Wl,'
      ;;
    solaris*)
      wl='-Wl,'
      ;;
    sunos4*)
      wl='-Qoption ld '
      ;;
    sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
      if test "x$host_vendor" = xsni; then
        wl='-LD'
      else
        wl='-Wl,'
      fi
      ;;
  esac
fi
hardcode_libdir_flag_spec=
hardcode_libdir_separator=
hardcode_direct=no
hardcode_minus_L=no
case "$host_os" in
  cygwin* | mingw* | pw32*)
    # FIXME: the MSVC++ port hasn't been tested in a loooong time
    # When not using gcc, we currently assume that we are using
    # Microsoft Visual C++.
    if test "$GCC" != yes; then
      with_gnu_ld=no
    fi
    ;;
  openbsd*)
    with_gnu_ld=no
    ;;
esac
ld_shlibs=yes
if test "$with_gnu_ld" = yes; then
  case "$host_os" in
    aix3* | aix4* | aix5*)
      # On AIX, the GNU linker is very broken
      ld_shlibs=no
      ;;
    amigaos*)
      hardcode_libdir_flag_spec='-L$libdir'
      hardcode_minus_L=yes
      # Samuel A. Falvo II <kc5tja@dolphin.openprojects.net> reports
      # that the semantics of dynamic libraries on AmigaOS, at least up
      # to version 4, is to share data among multiple programs linked
      # with the same dynamic library.  Since this doesn't match the
      # behavior of shared libraries on other platforms, we can use
      # them.
      ld_shlibs=no
      ;;
    beos*)
      if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
        :
      else
        ld_shlibs=no
      fi
      ;;
    cygwin* | mingw* | pw32*)
      # hardcode_libdir_flag_spec is actually meaningless, as there is
      # no search path for DLLs.
      hardcode_libdir_flag_spec='-L$libdir'
      ;;
    solaris* | sysv5*)
      if $LD -v 2>&1 | egrep 'BFD 2.8' > /dev/null; then
        ld_shlibs=no
      elif $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
        :
      else
        ld_shlibs=no
      fi
      ;;
    sunos4*)
      hardcode_direct=yes
      ;;
    *)
      if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
        :
      else
        ld_shlibs=no
      fi
      ;;
  esac
  if test "$ld_shlibs" = yes; then
    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
  fi
else
  case "$host_os" in
    aix3*)
      # Note: this linker hardcodes the directories in LIBPATH if there
      # are no directories specified by -L.
      hardcode_minus_L=yes
      if test "$GCC" = yes; then
        # Neither direct hardcoding nor static linking is supported with a
        # broken collect2.
        hardcode_direct=unsupported
      fi
      ;;
    aix4* | aix5*)
      if test "$host_cpu" = ia64; then
        # On IA64, the linker does run time linking by default, so we don't
        # have to do anything special.
        aix_use_runtimelinking=no
      else
        aix_use_runtimelinking=no
        # Test if we are trying to use run time linking or normal
        # AIX style linking. If -brtl is somewhere in LDFLAGS, we
        # need to do runtime linking.
        case $host_os in aix4.[23]|aix4.[23].*|aix5*)
          for ld_flag in $LDFLAGS; do
            if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl"); then
              aix_use_runtimelinking=yes
              break
            fi
          done
        esac
      fi
      hardcode_direct=yes
      hardcode_libdir_separator=':'
      if test "$GCC" = yes; then
        case $host_os in aix4.[012]|aix4.[012].*)
          collect2name=`${CC} -print-prog-name=collect2`
          if test -f "$collect2name" && 
            strings "$collect2name" | grep resolve_lib_name >/dev/null
          then
            # We have reworked collect2
            hardcode_direct=yes
          else
            # We have old collect2
            hardcode_direct=unsupported
            hardcode_minus_L=yes
            hardcode_libdir_flag_spec='-L$libdir'
            hardcode_libdir_separator=
          fi
        esac
      fi
      if test "$aix_use_runtimelinking" = yes; then
        hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:/usr/lib:/lib'
      else
        if test "$host_cpu" = ia64; then
          hardcode_libdir_flag_spec='${wl}-R $libdir:/usr/lib:/lib'
        else
          hardcode_libdir_flag_spec='${wl}-bnolibpath ${wl}-blibpath:$libdir:/usr/lib:/lib'
        fi
      fi
      ;;
    amigaos*)
      hardcode_libdir_flag_spec='-L$libdir'
      hardcode_minus_L=yes
      # see comment about different semantics on the GNU ld section
      ld_shlibs=no
      ;;
    cygwin* | mingw* | pw32*)
      # When not using gcc, we currently assume that we are using
      # Microsoft Visual C++.
      # hardcode_libdir_flag_spec is actually meaningless, as there is
      # no search path for DLLs.
      hardcode_libdir_flag_spec=' '
      libext=lib
      ;;
    darwin* | rhapsody*)
      hardcode_direct=yes
      ;;
    freebsd1*)
      ld_shlibs=no
      ;;
    freebsd2.2*)
      hardcode_libdir_flag_spec='-R$libdir'
      hardcode_direct=yes
      ;;
    freebsd2*)
      hardcode_direct=yes
      hardcode_minus_L=yes
      ;;
    freebsd*)
      hardcode_libdir_flag_spec='-R$libdir'
      hardcode_direct=yes
      ;;
    hpux9* | hpux10* | hpux11*)
      hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
      hardcode_libdir_separator=:
      hardcode_direct=yes
      hardcode_minus_L=yes # Not in the search PATH, but as the default
                           # location of the library.
      ;;
    irix5* | irix6*)
      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
      hardcode_libdir_separator=:
      ;;
    netbsd*)
      hardcode_libdir_flag_spec='-R$libdir'
      hardcode_direct=yes
      ;;
    newsos6)
      hardcode_direct=yes
      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
      hardcode_libdir_separator=:
      ;;
    openbsd*)
      hardcode_direct=yes
      if test -z "`echo __ELF__ | $CC -E - | grep __ELF__`" || test "$host_os-$host_cpu" = "openbsd2.8-powerpc"; then
        hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
      else
        case "$host_os" in
          openbsd[01].* | openbsd2.[0-7] | openbsd2.[0-7].*)
            hardcode_libdir_flag_spec='-R$libdir'
            ;;
          *)
            hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
            ;;
        esac
      fi
      ;;
    os2*)
      hardcode_libdir_flag_spec='-L$libdir'
      hardcode_minus_L=yes
      ;;
    osf3*)
      hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
      hardcode_libdir_separator=:
      ;;
    osf4* | osf5*)
      if test "$GCC" = yes; then
        hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
      else
        # Both cc and cxx compiler support -rpath directly
        hardcode_libdir_flag_spec='-rpath $libdir'
      fi
      hardcode_libdir_separator=:
      ;;
    sco3.2v5*)
      ;;
    solaris*)
      hardcode_libdir_flag_spec='-R$libdir'
      ;;
    sunos4*)
      hardcode_libdir_flag_spec='-L$libdir'
      hardcode_direct=yes
      hardcode_minus_L=yes
      ;;
    sysv4)
      if test "x$host_vendor" = xsno; then
        hardcode_direct=yes # is this really true???
      else
        hardcode_direct=no # Motorola manual says yes, but my tests say they lie
      fi
      ;;
    sysv4.3*)
      ;;
    sysv5*)
      hardcode_libdir_flag_spec=
      ;;
    uts4*)
      hardcode_libdir_flag_spec='-L$libdir'
      ;;
    dgux*)
      hardcode_libdir_flag_spec='-L$libdir'
      ;;
    sysv4*MP*)
      if test -d /usr/nec; then
        ld_shlibs=yes
      fi
      ;;
    sysv4.2uw2*)
      hardcode_direct=yes
      hardcode_minus_L=no
      ;;
    sysv5uw7* | unixware7*)
      ;;
    *)
      ld_shlibs=no
      ;;
  esac
fi
# Check dynamic linker characteristics
libname_spec='lib$name'
sys_lib_dlsearch_path_spec="/lib /usr/lib"
sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib"
case "$host_os" in
  aix3*)
    shlibext=so
    ;;
  aix4* | aix5*)
    shlibext=so
    ;;
  amigaos*)
    shlibext=ixlibrary
    ;;
  beos*)
    shlibext=so
    ;;
  bsdi4*)
    shlibext=so
    sys_lib_search_path_spec="/shlib /usr/lib /usr/X11/lib /usr/contrib/lib /lib /usr/local/lib"
    sys_lib_dlsearch_path_spec="/shlib /usr/lib /usr/local/lib"
    ;;
  cygwin* | mingw* | pw32*)
    case $GCC,$host_os in
      yes,cygwin*)
        shlibext=dll.a
        ;;
      yes,mingw*)
        shlibext=dll
        sys_lib_search_path_spec=`$CC -print-search-dirs | grep "^libraries:" | sed -e "s/^libraries://" -e "s/;/ /g"`
        ;;
      yes,pw32*)
        shlibext=dll
        ;;
      *)
        shlibext=dll
        ;;
    esac
    ;;
  darwin* | rhapsody*)
    shlibext=dylib
    ;;
  freebsd1*)
    ;;
  freebsd*)
    shlibext=so
    ;;
  gnu*)
    shlibext=so
    ;;
  hpux9* | hpux10* | hpux11*)
    shlibext=sl
    ;;
  irix5* | irix6*)
    shlibext=so
    case "$host_os" in
      irix5*)
        libsuff= shlibsuff=
        ;;
      *)
        case $LD in
          *-32|*"-32 ") libsuff= shlibsuff= ;;
          *-n32|*"-n32 ") libsuff=32 shlibsuff=N32 ;;
          *-64|*"-64 ") libsuff=64 shlibsuff=64 ;;
          *) libsuff= shlibsuff= ;;
        esac
        ;;
    esac
    sys_lib_search_path_spec="/usr/lib${libsuff} /lib${libsuff} /usr/local/lib${libsuff}"
    sys_lib_dlsearch_path_spec="/usr/lib${libsuff} /lib${libsuff}"
    ;;
  linux-gnuoldld* | linux-gnuaout* | linux-gnucoff*)
    ;;
  linux-gnu*)
    shlibext=so
    ;;
  netbsd*)
    shlibext=so
    ;;
  newsos6)
    shlibext=so
    ;;
  openbsd*)
    shlibext=so
    ;;
  os2*)
    libname_spec='$name'
    shlibext=dll
    ;;
  osf3* | osf4* | osf5*)
    shlibext=so
    sys_lib_search_path_spec="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc /usr/lib /usr/local/lib /var/shlib"
    sys_lib_dlsearch_path_spec="$sys_lib_search_path_spec"
    ;;
  sco3.2v5*)
    shlibext=so
    ;;
  solaris*)
    shlibext=so
    ;;
  sunos4*)
    shlibext=so
    ;;
  sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
    shlibext=so
    case "$host_vendor" in
      motorola)
        sys_lib_search_path_spec='/lib /usr/lib /usr/ccs/lib'
        ;;
    esac
    ;;
  uts4*)
    shlibext=so
    ;;
  dgux*)
    shlibext=so
    ;;
  sysv4*MP*)
    if test -d /usr/nec; then
      shlibext=so
    fi
    ;;
esac
sed_quote_subst='s/(["`$\])/\1/g'
escaped_wl=`echo "X$wl" | sed -e 's/^X//' -e "$sed_quote_subst"`
escaped_hardcode_libdir_flag_spec=`echo "X$hardcode_libdir_flag_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
escaped_sys_lib_search_path_spec=`echo "X$sys_lib_search_path_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
escaped_sys_lib_dlsearch_path_spec=`echo "X$sys_lib_dlsearch_path_spec" | sed -e 's/^X//' -e "$sed_quote_subst"`
sed -e 's/^([a-zA-Z0-9_]*)=/acl_cv_1=/' <<EOF
# How to pass a linker flag through the compiler.
wl="$escaped_wl"
# Static library suffix (normally "a").
libext="$libext"
# Shared library suffix (normally "so").
shlibext="$shlibext"
# Flag to hardcode $libdir into a binary during linking.
# This must work even if $libdir does not exist.
hardcode_libdir_flag_spec="$escaped_hardcode_libdir_flag_spec"
# Whether we need a single -rpath flag with a separated argument.
hardcode_libdir_separator="$hardcode_libdir_separator"
# Set to yes if using DIR/libNAME.so during linking hardcodes DIR into the
# resulting binary.
hardcode_direct="$hardcode_direct"
# Set to yes if using the -LDIR flag during linking hardcodes DIR into the
# resulting binary.
hardcode_minus_L="$hardcode_minus_L"
# Compile-time system search path for libraries
sys_lib_search_path_spec="$escaped_sys_lib_search_path_spec"
# Run-time system search path for libraries
sys_lib_dlsearch_path_spec="$escaped_sys_lib_dlsearch_path_spec"
EOF

						