ltconfig

一套linux下的C++开发库

    esac
   ;;

  amigaos*)
    archive_cmds='$rm $objdir/a2ixlibrary.data~$echo "#define NAME $libname" > $objdir/a2ixlibrary.data~$echo "#define LIBRARY_ID 1" >> $objdir/a2ixlibrary.data~$echo "#define VERSION $major" >> $objdir/a2ixlibrary.data~$echo "#define REVISION $revision" >> $objdir/a2ixlibrary.data~$AR cru $lib $libobjs~$RANLIB $lib~(cd $objdir && a2ixlibrary -32)'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_minus_L=yes
    # see comment about different semantics on the GNU ld section
    ld_shlibs=no
    ;;

  cygwin* | mingw*)
    # 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=' '
    allow_undefined_flag=unsupported
    # Tell ltmain to make .lib files, not .a files.
    libext=lib
    # FIXME: Setting linknames here is a bad hack.
    archive_cmds='$CC -o $lib $libobjs $linkopts `echo "$deplibs" | sed -e '\''s/ -lc$//'\''` -link -dll~linknames='
    # The linker will automatically build a .lib file if we build a DLL.
    old_archive_from_new_cmds='true'
    # FIXME: Should let the user specify the lib program.
    old_archive_cmds='lib /OUT:$oldlib$oldobjs'
    fix_srcfile_path='`cygpath -w $srcfile`'
    ;;

  freebsd1*)
    ld_shlibs=no
    ;;

  # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
  # support.  Future versions do this automatically, but an explicit c++rt0.o
  # does not break anything, and helps significantly (at the cost of a little
  # extra space).
  freebsd2.2*)
    archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linkopts /usr/lib/c++rt0.o'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_direct=yes
    hardcode_shlibpath_var=no
    ;;

  # Unfortunately, older versions of FreeBSD 2 do not have this feature.
  freebsd2*)
    archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linkopts'
    hardcode_direct=yes
    hardcode_minus_L=yes
    hardcode_shlibpath_var=no
    ;;

  # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
  freebsd*)
    archive_cmds='$CC -shared -o $lib $libobjs $deplibs $linkopts'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_direct=yes
    hardcode_shlibpath_var=no
    ;;

  hpux9* | hpux10* | hpux11*)
    case "$host_os" in
    hpux9*) archive_cmds='$rm $objdir/$soname~$LD -b +b $install_libdir -o $objdir/$soname $libobjs $deplibs $linkopts~test $objdir/$soname = $lib || mv $objdir/$soname $lib' ;;
    *) archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linkopts' ;;
    esac
    hardcode_libdir_flag_spec='${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.
    export_dynamic_flag_spec='${wl}-E'
    ;;

  irix5* | irix6*)
    if test "$with_gcc" = yes; then
      archive_cmds='$CC -shared $libobjs $deplibs $linkopts ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${objdir}/so_locations -o $lib'
    else
      archive_cmds='$LD -shared $libobjs $deplibs $linkopts -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
    fi
    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
    hardcode_libdir_separator=:
    ;;

  netbsd*)
    if echo __ELF__ | $CC -E - | grep __ELF__ >/dev/null; then
      archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linkopts'  # a.out
    else
      archive_cmds='$LD -shared -o $lib $libobjs $deplibs $linkopts'      # ELF
    fi
    hardcode_libdir_flag_spec='${wl}-R$libdir'
    hardcode_direct=yes
    hardcode_shlibpath_var=no
    ;;

  openbsd*)
    archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linkopts'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_direct=yes
    hardcode_shlibpath_var=no
    ;;

  os2*)
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_minus_L=yes
    allow_undefined_flag=unsupported
    archive_cmds='$echo "LIBRARY $libname INITINSTANCE" > $objdir/$libname.def~$echo "DESCRIPTION \"$libname\"" >> $objdir/$libname.def~$echo DATA >> $objdir/$libname.def~$echo " SINGLE NONSHARED" >> $objdir/$libname.def~$echo EXPORTS >> $objdir/$libname.def~emxexp $libobjs >> $objdir/$libname.def~$CC -Zdll -Zcrtdll -o $lib $libobjs $deplibs $linkopts $objdir/$libname.def'
    old_archive_from_new_cmds='emximp -o $objdir/$libname.a $objdir/$libname.def'
    ;;

  osf3* | osf4*)
    if test "$with_gcc" = yes; then
      allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
      archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $linkopts ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${objdir}/so_locations -o $lib'
    else
      allow_undefined_flag=' -expect_unresolved \*'
      archive_cmds='$LD -shared${allow_undefined_flag} $libobjs $deplibs $linkopts -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
    fi
    hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
    hardcode_libdir_separator=:
    ;;

  sco3.2v5*)
    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
    hardcode_shlibpath_var=no
    runpath_var=LD_RUN_PATH
    hardcode_runpath_var=yes
    ;;

  solaris*)
    no_undefined_flag=' -z text'
    # $CC -shared without GNU ld will not create a library from C++
    # object files and a static libstdc++, better avoid it by now
    archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linkopts'
    archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
		$LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linkopts~$rm $lib.exp'
    hardcode_libdir_flag_spec='-R$libdir'
    hardcode_shlibpath_var=no
    case "$host_os" in
    solaris2.[0-5] | solaris2.[0-5].*) ;;
    *) # Supported since Solaris 2.6 (maybe 2.5.1?)
      whole_archive_flag_spec='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract' ;;
    esac
    ;;

  sunos4*)
    archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linkopts'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_direct=yes
    hardcode_minus_L=yes
    hardcode_shlibpath_var=no
    ;;

  sysv4)
    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
    runpath_var='LD_RUN_PATH'
    hardcode_shlibpath_var=no
    hardcode_direct=no #Motorola manual says yes, but my tests say they lie 
    ;;  

  sysv4.3*)
    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
    hardcode_shlibpath_var=no
    export_dynamic_flag_spec='-Bexport'
    ;;

  uts4*)
    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_shlibpath_var=no
    ;;

  dgux*)
    archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linkopts'
    hardcode_libdir_flag_spec='-L$libdir'
    hardcode_shlibpath_var=no
    ;;

  *)
    ld_shlibs=no
    ;;
  esac
fi
echo "$ac_t$ld_shlibs" 1>&6
test "$ld_shlibs" = no && can_build_shared=no

if test -z "$NM"; then
  echo $ac_n "checking for BSD-compatible nm... $ac_c" 1>&6
  case "$NM" in
  [\\/]* | [A-Za-z]:[\\/]*) ;; # Let the user override the test with a path.
  *)
    IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR}"
    for ac_dir in $PATH /usr/ucb /usr/ccs/bin /bin; do
      test -z "$ac_dir" && ac_dir=.
      if test -f $ac_dir/nm || test -f $ac_dir/nm$ac_exeext; then
	# Check to see if the nm accepts a BSD-compat flag.
	# Adding the `sed 1q' prevents false positives on HP-UX, which says:
	#   nm: unknown option "B" ignored
	if ($ac_dir/nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
	  NM="$ac_dir/nm -B"
	  break
	elif ($ac_dir/nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
	  NM="$ac_dir/nm -p"
	  break
	else
	  NM=${NM="$ac_dir/nm"} # keep the first match, but
	  continue # so that we can try to find one that supports BSD flags
	fi
      fi
    done
    IFS="$ac_save_ifs"
    test -z "$NM" && NM=nm
    ;;
  esac
  echo "$ac_t$NM" 1>&6
fi

# Check for command to grab the raw symbol name followed by C symbol from nm.
echo $ac_n "checking command to parse $NM output... $ac_c" 1>&6

# These are sane defaults that work on at least a few old systems.
# [They come from Ultrix.  What could be older than Ultrix?!! ;)]

# Character class describing NM global symbol codes.
symcode='[BCDEGRST]'

# Regexp to match symbols that can be accessed directly from C.
sympat='\([_A-Za-z][_A-Za-z0-9]*\)'

# Transform the above into a raw symbol and a C symbol.
symxfrm='\1 \2\3 \3'

# Transform an extracted symbol line into a proper C declaration
global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern char \1;/p'"

# Define system-specific variables.
case "$host_os" in
aix*)
  symcode='[BCDT]'
  ;;
cygwin* | mingw*)
  symcode='[ABCDGISTW]'
  ;;
hpux*) # Its linker distinguishes data from code symbols
  global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern char \1();/p' -e 's/^. .* \(.*\)$/extern char \1;/p'"
  ;;
irix*)
  symcode='[BCDEGRST]'
  ;;
solaris*)
  symcode='[BDT]'
  ;;
sysv4)
  symcode='[DFNSTU]'
  ;;
esac

# If we're using GNU nm, then use its standard symbol codes.
if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
  symcode='[ABCDGISTW]'
fi

# Try without a prefix undercore, then with it.
for ac_symprfx in "" "_"; do

  # Write the raw and C identifiers.
  global_symbol_pipe="sed -n -e 's/^.*[ 	]\($symcode\)[ 	][ 	]*\($ac_symprfx\)$sympat$/$symxfrm/p'"

  # Check to see that the pipe works correctly.
  pipe_works=no
  $rm conftest*
  cat > conftest.c <<EOF
#ifdef __cplusplus
extern "C" {
#endif
char nm_test_var;
void nm_test_func(){}
#ifdef __cplusplus
}
#endif
main(){nm_test_var='a';nm_test_func();return(0);}
EOF

  echo "$progname:1507: checking if global_symbol_pipe works" >&5
  if { (eval echo $progname:1508: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; } && test -s conftest.$objext; then
    # Now try to grab the symbols.
    nlist=conftest.nm
    if { echo "$progname:1511: eval \"$NM conftest.$objext | $global_symbol_pipe > $nlist\"" >&5; eval "$NM conftest.$objext | $global_symbol_pipe > $nlist 2>&5"; } && test -s "$nlist"; then

      # Try sorting and uniquifying the output.
      if sort "$nlist" | uniq > "$nlist"T; then
	mv -f "$nlist"T "$nlist"
      else
	rm -f "$nlist"T
      fi

      # Make sure that we snagged all the symbols we need.
      if egrep ' nm_test_var$' "$nlist" >/dev/null; then
	if egrep ' nm_test_func$' "$nlist" >/dev/null; then
	  cat <<EOF > conftest.c
#ifdef __cplusplus
extern "C" {
#endif

EOF
	  # Now generate the symbol file.
	  eval "$global_symbol_to_cdecl"' < "$nlist" >> conftest.c'

	  cat <<EOF >> conftest.c
#if defined (__STDC__) && __STDC__
# define lt_ptr_t void *
#else
# define lt_ptr_t char *
# define const
#endif

/* The mapping between symbol names and symbols. */
const struct {
  const char *name;
  lt_ptr_t address;
}
lt_preloaded_symbols[] =
{
EOF
	  sed 's/^. \(.*\) \(.*\)$/  {"\2", (lt_ptr_t) \&\2},/' < "$nlist" >> conftest.c
	  cat <<\EOF >> conftest.c
  {0, (lt_ptr_t) 0}
};

#ifdef __cplusplus
}
#endif
EOF
	  # Now try linking the two files.
	  mv conftest.$objext conftstm.$objext
	  save_LIBS="$LIBS"
	  save_CFLAGS="$CFLAGS"
	  LIBS="conftstm.$objext"
	  CFLAGS="$CFLAGS$no_builtin_flag"
	  if { (eval echo $progname:1563: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
	    pipe_works=yes
	  else
	    echo "$progname: failed program was:" >&5
	    cat conftest.c >&5
	  fi
	  LIBS="$save_LIBS"
	else
	  echo "cannot find nm_test_func in $nlist" >&5
	fi
      else
	echo "cannot find nm_test_var in $nlist" >&5
      fi
    else
      echo "cannot run $global_symbol_pipe" >&5
    fi
  else
    echo "$progname: failed program was:" >&5
    cat conftest.c >&5
  fi
  $rm conftest* conftst*

  # Do not use the global_symbol_pipe unless it works.
  if test "$pipe_works" = yes; then
    break
  else
    global_symbol_pipe=
  fi
done
if test "$pipe_works" = yes; then
  echo "${ac_t}ok" 1>&6
else
  echo "${ac_t}failed" 1>&6
fi

if test -z "$global_symbol_pipe"; then
  global_symbol_to_cdecl=
fi

# Check hardcoding attributes.
echo $ac_n "checking how to hardcode library paths into programs... $ac_c" 1>&6
hardcode_action=
if test -n "$hardcode_libdir_flag_spec" || \
   test -n "$runpath_var"; then

  # We can hardcode non-existant directories.
  if test "$hardcode_direct" != no &&
     # If the only mechanism to avoid hardcoding is shlibpath_var, we
     # have to relink, otherwise we might link with an installed library
     # when we should be linking with a yet-to-be-installed one
     ## test "$hardcode_shlibpath_var" != no &&
     test "$hardcode_minus_L" != no; then
    # Linking always hardcodes the temporary library directory.
    hardcode_action=relink
  else
    # We can link without hardcoding, and we can hardcode nonexisting dirs.
    hardcode_action=immediate
  fi
else
  # We cannot hardcode anything, or else we can only hardcode existing
  # directories.
  hardcode_action=unsupported
fi
echo "$ac_t$hardcode_action" 1>&6


reload_flag=
reload_cmds='$LD$reload_flag -o $output$reload_objs'
echo $ac_n "checking for $LD option to reload object files... $ac_c" 1>&6
# PORTME Some linkers may need a different reload flag.