ltcf-cxx.sh

   1 #### This script is meant to be sourced by ltconfig.
   2
   3 # ltcf-cxx.sh - Create a C++ compiler specific configuration
   4 #
   5 # Copyright (C) 1996-1999, 2000, 2001 Free Software Foundation, Inc.
   6 # Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
   7 #
   8 # Original C++ support by:Gary V. Vaughan <gvv@techie.com>
   9 #    Alexandre Oliva <oliva@lsd.ic.unicamp.br>
  10 #    Ossama Othman <ossama@debian.org>
  11 #    Thomas Thanner <tanner@gmx.de>
  12 #
  13 # This file is free software; you can redistribute it and/or modify it
  14 # under the terms of the GNU General Public License as published by
  15 # the Free Software Foundation; either version 2 of the License, or
  16 # (at your option) any later version.
  17 #
  18 # This program is distributed in the hope that it will be useful, but
  19 # WITHOUT ANY WARRANTY; without even the implied warranty of
  20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21 # General Public License for more details.
  22 #
  23 # You should have received a copy of the GNU General Public License
  24 # along with this program; if not, write to the Free Software
  25 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26 #
  27 # As a special exception to the GNU General Public License, if you
  28 # distribute this file as part of a program that contains a
  29 # configuration script generated by Autoconf, you may include it under
  30 # the same distribution terms that you use for the rest of that program.
  31
  32
  33 # Source file extension for C++ test sources.
  34 ac_ext=cc
  35
  36 # Object file extension for compiled C++ test sources.
  37 objext=o
  38
  39 # Code to be used in simple compile tests
  40 lt_simple_compile_test_code="int some_variable = 0;"
  41
  42 # Code to be used in simple link tests
  43 lt_simple_link_test_code='int main(int, char *[]) { return (0); }'
  44
  45 # C++ compiler
  46 CXX=${CXX-c++}
  47
  48 # ltmain only uses $CC for tagged configurations so make sure $CC is set.
  49 CC=${CC-"$CXX"}
  50 CFLAGS=${CFLAGS-"$CXXFLAGS"}
  51
  52 # Allow CC to be a program name with arguments.
  53 set dummy $CC
  54 compiler=$2
  55 cc_basename=`$echo X"$compiler" | $Xsed -e 's%^.*/%%'`
  56
  57 # Check if we are using GNU gcc  (taken/adapted from configure script)
  58 # We need to check here since "--with-gcc" is set at configure time,
  59 # not ltconfig time!
  60 cat > conftest.$ac_ext <<EOF
  61 #ifdef __GNUC__
  62   yes;
  63 #endif
  64 EOF
  65 if { ac_try='${CC-c++} -E conftest.$ac_ext'; { (eval echo \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
  66   with_gcc=yes
  67
  68   # Set up default GNU C++ configuration
  69
  70   # Check if GNU C++ uses GNU ld as the underlying linker, since the
  71   # archiving commands below assume that GNU ld is being used.
  72   if eval "`$CC -print-prog-name=ld` --version 2>&1" | \
  73       egrep 'GNU ld' > /dev/null; then
  74     with_gnu_ld=yes
  75
  76     archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
  77     archive_expsym_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
  78
  79     hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
  80     export_dynamic_flag_spec='${wl}--export-dynamic'
  81
  82     # If archive_cmds runs LD, not CC, wlarc should be empty
  83     # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to
  84     #     investigate it a little bit more. (MM)
  85     wlarc='${wl}'
  86
  87     # ancient GNU ld didn't support --whole-archive et. al.
  88     if eval "`$CC -print-prog-name=ld` --help 2>&1" | \
  89         egrep 'no-whole-archive' > /dev/null; then
  90       whole_archive_flag_spec="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
  91     else
  92       whole_archive_flag_spec=
  93     fi
  94   else
  95     with_gnu_ld=no
  96     wlarc=
  97
  98     # A generic and very simple default shared library creation
  99     # command for GNU C++ for the case where it uses the native
 100     # linker, instead of GNU ld.  If possible, this setting should
 101     # overridden to take advantage of the native linker features on
 102     # the platform it is being used on.
 103     archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
 104   fi
 105
 106   # Commands to make compiler produce verbose output that lists
 107   # what "hidden" libraries, object files and flags are used when
 108   # linking a shared library.
 109   output_verbose_link_cmds='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'
 110
 111 else
 112   with_gcc=no
 113   with_gnu_ld=no
 114   wlarc=
 115 fi
 116
 117 # In general, the C++ compiler should always link C++ objects.
 118 case $target in
 119 *aix3* | *aix4* | *aix5*)
 120   # AIX just has to be different, doesn't it? :-\
 121   LD=makeC++SharedLib_r
 122   LDFLAGS="$LDFLAGS -p 0"
 123   ;;
 124 *)
 125   LD="$CC"
 126   LDFLAGS="$LDFLAGS"
 127   ;;
 128 esac
 129
 130
 131 # PORTME: fill in a description of your system's C++ link characteristics
 132 case "$host_os" in
 133   aix3*)
 134     # FIXME: insert proper C++ library support
 135     ld_shlibs=no
 136     ;;
 137   aix4* | aix5*)
 138     archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${wl}-bE:$export_symbols ${wl}-bnoentry${allow_undefined_flag}~$AR $AR_FLAGS $output_objdir/$libname$release.a $output_objdir/$soname'
 139     # -bexpall does not export symbols beginning with underscore (_)
 140     always_export_symbols=yes
 141     # Exported symbols can be pulled into shared objects from archives
 142     whole_archive_flag_spec=' '
 143     build_libtool_need_lc=yes
 144
 145     # We don't want to build shared libraries on unknown CPU types.
 146     case $host_cpu in
 147     powerpc | rs6000) ;;
 148     *) ld_shlibs=no ;;
 149     esac
 150     ;;
 151   chorus*)
 152     case "$cc_basename" in
 153       *)
 154         # FIXME: insert proper C++ library support
 155         ld_shlibs=no
 156         ;;
 157     esac
 158     ;;
 159   dgux*)
 160     case "$cc_basename" in
 161       ec++)
 162         # FIXME: insert proper C++ library support
 163         ld_shlibs=no
 164         ;;
 165       ghcx)
 166         # Green Hills C++ Compiler
 167         # FIXME: insert proper C++ library support
 168         ld_shlibs=no
 169         ;;
 170       *)
 171         # FIXME: insert proper C++ library support
 172         ld_shlibs=no
 173         ;;
 174     esac
 175     ;;
 176   freebsd[12]*)
 177     # C++ shared libraries reported to be fairly broken before switch to ELF
 178     ld_shlibs=no
 179     ;;
 180   freebsd*)
 181     # FreeBSD 3 and later use GNU C++ and GNU ld with standard ELF
 182     # conventions
 183     ld_shlibs=yes
 184     ;;
 185   hpux*)
 186     case "$cc_basename" in
 187       CC)
 188         # FIXME: insert proper C++ library support
 189         ld_shlibs=no
 190         ;;
 191       aCC)
 192         case "$host_os" in
 193         hpux9*) archive_cmds='$rm $output_objdir/$soname~$CC -b ${wl}+b ${wl}$install_libdir -o $output_objdir/$soname $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib' ;;
 194         *) archive_cmds='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' ;;
 195         esac
 196         hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
 197         hardcode_libdir_separator=:
 198         hardcode_direct=yes
 199         hardcode_minus_L=yes # Not in the search PATH, but as the default
 200                              # location of the library.
 201         export_dynamic_flag_spec='${wl}-E'
 202
 203         # Commands to make compiler produce verbose output that lists
 204         # what "hidden" libraries, object files and flags are used when
 205         # linking a shared library.
 206         #
 207         # There doesn't appear to be a way to prevent this compiler from
 208         # explicitly linking system object files so we need to strip them
 209         # from the output so that they don't get included in the library
 210         # dependencies.
 211         output_verbose_link_cmds='templist=`($CC -b $CFLAGS -v conftest.$objext 2>&1) | egrep "\-L"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; echo $list'
 212         ;;
 213       *)
 214         # FIXME: insert proper C++ library support
 215         ld_shlibs=no
 216         ;;
 217     esac
 218     ;;
 219   irix5* | irix6*)
 220     case "$cc_basename" in
 221       CC)
 222         # SGI C++
 223         archive_cmds='$CC -shared -all -multigot $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
 224
 225         # Archives containing C++ object files must be created using
 226         # "CC -ar", where "CC" is the IRIX C++ compiler.  This is
 227         # necessary to make sure instantiated templates are included
 228         # in the archive.
 229         old_archive_cmds='$CC -ar -WR,-u -o $oldlib $oldobjs'
 230         ;;
 231       *)
 232         if test "$with_gcc" = yes; then
 233           if test "$with_gnu_ld" = no; then
 234             archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${objdir}/so_locations -o $lib'
 235           else
 236             archive_cmds='$LD -shared $predep_objects $libobjs $deplibs $postdep_objects $linker_flags -soname $soname `test -n "$verstring" && echo -set_version $verstring` -o $lib'
 237           fi
 238         fi
 239         hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 240         hardcode_libdir_separator=:
 241         link_all_deplibs=yes
 242         ;;
 243     esac
 244     ;;
 245   linux*)
 246     case "$cc_basename" in
 247       KCC)
 248         # Kuck and Associates, Inc. (KAI) C++ Compiler
 249
 250         # KCC will only create a shared library if the output file
 251         # ends with ".so" (or ".sl" for HP-UX), so rename the library
 252         # to its proper name (with version) after linking.
 253         archive_cmds='templib=`echo $lib | sed -e "s/\.so\..*/\.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
 254         archive_expsym_cmds='templib=`echo $lib | sed -e "s/\.so\..*/\.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib ${wl}-retain-symbols-file,$export_symbols; mv \$templib $lib'
 255
 256         # Commands to make compiler produce verbose output that lists
 257         # what "hidden" libraries, object files and flags are used when
 258         # linking a shared library.
 259         #
 260         # There doesn't appear to be a way to prevent this compiler from
 261         # explicitly linking system object files so we need to strip them
 262         # from the output so that they don't get included in the library
 263         # dependencies.
 264         output_verbose_link_cmds='templist=`$CC $CFLAGS -v conftest.$objext -o libconftest.so 2>&1 | egrep "ld"`; rm -f libconftest.so; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; echo $list'
 265
 266         hardcode_libdir_flag_spec='${wl}--rpath,$libdir'
 267         export_dynamic_flag_spec='${wl}--export-dynamic'
 268
 269         # Archives containing C++ object files must be created using
 270         # "CC -Bstatic", where "CC" is the KAI C++ compiler.
 271         old_archive_cmds='$CC -Bstatic -o $oldlib $oldobjs'
 272         ;;
 273       cxx)
 274         # Compaq C++
 275         archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
 276         archive_expsym_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname  -o $lib ${wl}-retain-symbols-file $wl$export_symbols'
 277
 278         runpath_var=LD_RUN_PATH
 279         hardcode_libdir_flag_spec='-rpath $libdir'
 280         hardcode_libdir_separator=:
 281
 282         # Commands to make compiler produce verbose output that lists
 283         # what "hidden" libraries, object files and flags are used when
 284         # linking a shared library.
 285         #
 286         # There doesn't appear to be a way to prevent this compiler from
 287         # explicitly linking system object files so we need to strip them
 288         # from the output so that they don't get included in the library
 289         # dependencies.
 290         output_verbose_link_cmds='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | grep "ld"`; templist=`echo $templist | sed "s/\(^.*ld.*\)\( .*ld .*$\)/\1/"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; echo $list'
 291         ;;
 292     esac
 293     ;;
 294   lynxos*)
 295     # FIXME: insert proper C++ library support
 296     ld_shlibs=no
 297     ;;
 298   m88k*)
 299     # FIXME: insert proper C++ library support
 300     ld_shlibs=no
 301     ;;
 302   mvs*)
 303     case "$cc_basename" in
 304       cxx)
 305         # FIXME: insert proper C++ library support
 306         ld_shlibs=no
 307         ;;
 308       *)
 309         # FIXME: insert proper C++ library support
 310         ld_shlibs=no
 311         ;;
 312     esac
 313     ;;
 314   netbsd*)
 315     # NetBSD uses g++ - do we need to do anything?
 316     ;;
 317   osf3*)
 318     if test "$with_gcc" = yes && test "$with_gnu_ld" = no; then
 319       allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 320       archive_cmds='$CC -shared -nostdlib ${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${objdir}/so_locations -o $lib'
 321
 322       hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 323       hardcode_libdir_separator=:
 324
 325       # Commands to make compiler produce verbose output that lists
 326       # what "hidden" libraries, object files and flags are used when
 327       # linking a shared library.
 328       output_verbose_link_cmds='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'
 329     fi
 330
 331     case "$cc_basename" in
 332       KCC)
 333         # Kuck and Associates, Inc. (KAI) C++ Compiler
 334
 335         # KCC will only create a shared library if the output file
 336         # ends with ".so" (or ".sl" for HP-UX), so rename the library
 337         # to its proper name (with version) after linking.
 338         archive_cmds='templib=`echo $lib | sed -e "s/\.so\..*/\.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
 339
 340         hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
 341         hardcode_libdir_separator=:
 342
 343         # Archives containing C++ object files must be created using
 344         # "CC -Bstatic", where "CC" is the KAI C++ compiler.
 345         old_archive_cmds='$CC -Bstatic -o $oldlib $oldobjs'
 346
 347         ;;
 348       RCC)
 349         # Rational C++ 2.4.1
 350         # FIXME: insert proper C++ library support
 351         ld_shlibs=no
 352         ;;
 353       cxx)
 354         allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 355         archive_cmds='$CC -shared${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $soname `test -n "$verstring" && echo ${wl}-set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
 356
 357         hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 358         hardcode_libdir_separator=:
 359
 360         # Commands to make compiler produce verbose output that lists
 361         # what "hidden" libraries, object files and flags are used when
 362         # linking a shared library.
 363         #
 364         # There doesn't appear to be a way to prevent this compiler from
 365         # explicitly linking system object files so we need to strip them
 366         # from the output so that they don't get included in the library
 367         # dependencies.
 368         output_verbose_link_cmds='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | grep "ld" | grep -v "ld:"`; templist=`echo $templist | sed "s/\(^.*ld.*\)\( .*ld.*$\)/\1/"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; echo $list'
 369         ;;
 370       *)
 371         # FIXME: insert proper C++ library support
 372         ld_shlibs=no
 373         ;;
 374     esac
 375     ;;
 376   osf4* | osf5*)
 377     if test "$with_gcc" = yes && test "$with_gnu_ld" = no; then
 378       allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 379       archive_cmds='$CC -shared -nostdlib ${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-msym ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${objdir}/so_locations -o $lib'
 380
 381       hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 382       hardcode_libdir_separator=:
 383
 384       # Commands to make compiler produce verbose output that lists
 385       # what "hidden" libraries, object files and flags are used when
 386       # linking a shared library.
 387       output_verbose_link_cmds='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'
 388     fi
 389
 390     case "$cc_basename" in
 391       KCC)
 392         # Kuck and Associates, Inc. (KAI) C++ Compiler
 393
 394         # KCC will only create a shared library if the output file
 395         # ends with ".so" (or ".sl" for HP-UX), so rename the library
 396         # to its proper name (with version) after linking.
 397         archive_cmds='templib=`echo $lib | sed -e "s/\.so\..*/\.so/"`; $CC $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags --soname $soname -o \$templib; mv \$templib $lib'
 398
 399         hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
 400         hardcode_libdir_separator=:
 401
 402         # Archives containing C++ object files must be created using
 403         # the KAI C++ compiler.
 404         old_archive_cmds='$CC -o $oldlib $oldobjs'
 405         ;;
 406       RCC)
 407         # Rational C++ 2.4.1
 408         # FIXME: insert proper C++ library support
 409         ld_shlibs=no
 410         ;;
 411       cxx)
 412         allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 413         archive_cmds='$CC -shared${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-msym ${wl}-soname $soname `test -n "$verstring" && echo ${wl}-set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
 414
 415         hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 416         hardcode_libdir_separator=:
 417
 418         # Commands to make compiler produce verbose output that lists
 419         # what "hidden" libraries, object files and flags are used when
 420         # linking a shared library.
 421         #
 422         # There doesn't appear to be a way to prevent this compiler from
 423         # explicitly linking system object files so we need to strip them
 424         # from the output so that they don't get included in the library
 425         # dependencies.
 426         output_verbose_link_cmds='templist=`$CC -shared $CFLAGS -v conftest.$objext 2>&1 | grep "ld" | grep -v "ld:"`; templist=`echo $templist | sed "s/\(^.*ld.*\)\( .*ld.*$\)/\1/"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; echo $list'
 427         ;;
 428       *)
 429         # FIXME: insert proper C++ library support
 430         ld_shlibs=no
 431         ;;
 432     esac
 433     ;;
 434   psos*)
 435     # FIXME: insert proper C++ library support
 436     ld_shlibs=no
 437     ;;
 438   sco*)
 439     case "$cc_basename" in
 440       CC)
 441         # FIXME: insert proper C++ library support
 442         ld_shlibs=no
 443         ;;
 444       *)
 445         # FIXME: insert proper C++ library support
 446         ld_shlibs=no
 447         ;;
 448     esac
 449     ;;
 450   sunos4*)
 451     case "$cc_basename" in
 452       CC)
 453         # Sun C++ 4.x
 454         # FIXME: insert proper C++ library support
 455         ld_shlibs=no
 456         ;;
 457       lcc)
 458         # Lucid
 459         # FIXME: insert proper C++ library support
 460         ld_shlibs=no
 461         ;;
 462       *)
 463         # FIXME: insert proper C++ library support
 464         ld_shlibs=no
 465         ;;
 466     esac
 467     ;;
 468   solaris*)
 469     case "$cc_basename" in
 470       CC)
 471         # Sun C++ 4.2, 5.x and Centerline C++
 472         no_undefined_flag=' -ztext'
 473         archive_cmds='$CC -G${allow_undefined_flag} -nolib -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
 474         archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 475         $CC -G${allow_undefined_flag} -nolib ${wl}-M ${wl}$lib.exp -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$rm $lib.exp'
 476
 477         hardcode_libdir_flag_spec='-R$libdir'
 478         hardcode_shlibpath_var=no
 479         case "$host_os" in
 480           solaris2.[0-5] | solaris2.[0-5].*) ;;
 481           *)
 482             # The C++ compiler is used as linker so we must use $wl
 483             # flag to pass the commands to the underlying system
 484             # linker.
 485             # Supported since Solaris 2.6 (maybe 2.5.1?)
 486             whole_archive_flag_spec='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract'
 487             ;;
 488         esac
 489         link_all_deplibs=yes
 490
 491         # Commands to make compiler produce verbose output that lists
 492         # what "hidden" libraries, object files and flags are used when
 493         # linking a shared library.
 494         #
 495         # There doesn't appear to be a way to prevent this compiler from
 496         # explicitly linking system object files so we need to strip them
 497         # from the output so that they don't get included in the library
 498         # dependencies.
 499         output_verbose_link_cmds='templist=`$CC -G $CFLAGS -v conftest.$objext 2>&1 | egrep "\-R|\-L"`; list=""; for z in $templist; do case $z in conftest.$objext) list="$list $z";; *.$objext);; *) list="$list $z";;esac; done; echo $list'
 500
 501         # Archives containing C++ object files must be created using
 502         # "CC -xar", where "CC" is the Sun C++ compiler.  This is
 503         # necessary to make sure instantiated templates are included
 504         # in the archive.
 505         old_archive_cmds='$CC -xar -o $oldlib $oldobjs'
 506         ;;
 507       gcx)
 508         # Green Hills C++ Compiler
 509         archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib'
 510
 511         # The C++ compiler must be used to create the archive.
 512         old_archive_cmds='$CC $LDFLAGS -archive -o $oldlib $oldobjs'
 513         ;;
 514       *)
 515         # GNU C++ compiler with Solaris linker
 516         if test "$with_gcc" = yes && test "$with_gnu_ld" = no; then
 517           if $CC --version | egrep -v '^2\.7' > /dev/null; then
 518             archive_cmds='$LD -shared -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $linker_flags ${wl}-h $wl$soname -o $lib'
 519             archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 520                 $LD -shared -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $linker_flags~$rm $lib.exp'
 521
 522             # Commands to make compiler produce verbose output that lists
 523             # what "hidden" libraries, object files and flags are used when
 524             # linking a shared library.
 525             output_verbose_link_cmds="$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep \"\-L\""
 526           else
 527             # g++ 2.7 appears to require `-G' NOT `-shared' on this
 528             # platform.
 529             archive_cmds='$LD -G -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $linker_flags ${wl}-h $wl$soname -o $lib'
 530             archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 531                 $LD -G -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $linker_flags~$rm $lib.exp'
 532
 533             # Commands to make compiler produce verbose output that lists
 534             # what "hidden" libraries, object files and flags are used when
 535             # linking a shared library.
 536             output_verbose_link_cmds="$CC -G $CFLAGS -v conftest.$objext 2>&1 | egrep \"\-L\""
 537           fi
 538
 539           hardcode_libdir_flag_spec='${wl}-R $wl$libdir'
 540         fi
 541         ;;
 542     esac
 543     ;;
 544   tandem*)
 545     case "$cc_basename" in
 546       NCC)
 547         # NonStop-UX NCC 3.20
 548         # FIXME: insert proper C++ library support
 549         ld_shlibs=no
 550         ;;
 551       *)
 552         # FIXME: insert proper C++ library support
 553         ld_shlibs=no
 554         ;;
 555     esac
 556     ;;
 557   unixware*)
 558     # FIXME: insert proper C++ library support
 559     ld_shlibs=no
 560     ;;
 561   vxworks*)
 562     # FIXME: insert proper C++ library support
 563     ld_shlibs=no
 564     ;;
 565   *)
 566     # FIXME: insert proper C++ library support
 567     ld_shlibs=no
 568     ;;
 569 esac
 570
 571
 572 ## Compiler Characteristics: PIC flags, static flags, etc
 573
 574 # We don't use cached values here since only the C compiler
 575 # characteristics should be cached.
 576 ac_cv_prog_cc_pic=
 577 ac_cv_prog_cc_shlib=
 578 ac_cv_prog_cc_wl=
 579 ac_cv_prog_cc_static=
 580 ac_cv_prog_cc_no_builtin=
 581 ac_cv_prog_cc_can_build_shared=$can_build_shared
 582
 583 ac_cv_prog_cc_pic_works=
 584 ac_cv_prog_cc_static_works=
 585
 586 if test "$with_gcc" = yes; then
 587   ac_cv_prog_cc_wl='-Wl,'
 588   ac_cv_prog_cc_static='-static'
 589
 590   case "$host_os" in
 591   beos* | irix5* | irix6* | osf3* | osf4* | osf5*)
 592     # PIC is the default for these OSes.
 593     ;;
 594   aix*)
 595     # Below there is a dirty hack to force normal static linking with -ldl
 596     # The problem is because libdl dynamically linked with both libc and
 597     # libC (AIX C++ library), which obviously doesn't included in libraries
 598     # list by gcc. This cause undefined symbols with -static flags.
 599     # This hack allows C programs to be linked with "-static -ldl", but
 600     # we not sure about C++ programs.
 601     ac_cv_prog_cc_static="$ac_cv_prog_cc_static ${ac_cv_prog_cc_wl}-lC"
 602     ;;
 603   *djgpp*)
 604     # DJGPP does not support shared libraries at all
 605     ac_cv_prog_cc_pic=
 606     ;;
 607   cygwin* | mingw* | os2*)
 608     # This hack is so that the source file can tell whether it is being
 609     # built for inclusion in a dll (and should export symbols for example).
 610     ac_cv_prog_cc_pic='-DDLL_EXPORT'
 611     ;;
 612   amigaos*)
 613     # FIXME: we need at least 68020 code to build shared libraries, but
 614     # adding the `-m68020' flag to GCC prevents building anything better,
 615     # like `-m68040'.
 616     ac_cv_prog_cc_pic='-m68020 -resident32 -malways-restore-a4'
 617     ;;
 618   sysv4*MP*)
 619     if test -d /usr/nec; then
 620       ac_cv_prog_cc_pic=-Kconform_pic
 621     fi
 622     ;;
 623   *)
 624     ac_cv_prog_cc_pic='-fPIC'
 625     ;;
 626   esac
 627 else
 628   case "$host_os" in
 629     aix4* | aix5*)
 630       # All AIX code is PIC.
 631       ;;
 632     chorus*)
 633       case "$cc_basename" in
 634       cxch68)
 635         # Green Hills C++ Compiler
 636         # ac_cv_prog_cc_static="--no_auto_instantiation -u __main -u __premain -u _abort -r $COOL_DIR/lib/libOrb.a $MVME_DIR/lib/CC/libC.a $MVME_DIR/lib/classix/libcx.s.a"
 637         ;;
 638       esac
 639       ;;
 640     dgux*)
 641       case "$cc_basename" in
 642         ec++)
 643           ac_cv_prog_cc_pic='-KPIC'
 644           ;;
 645         ghcx)
 646           # Green Hills C++ Compiler
 647           ac_cv_prog_cc_pic='-pic'
 648           ;;
 649         *)
 650           ;;
 651       esac
 652       ;;
 653     freebsd*)
 654       # FreeBSD uses GNU C++
 655       ;;
 656     hpux9* | hpux10* | hpux11*)
 657       case "$cc_basename" in
 658         CC)
 659           ac_cv_prog_cc_wl='-Wl,'
 660           ac_cv_prog_cc_static="${ac_cv_prog_cc_wl}-a ${ac_cv_prog_cc_wl}archive"
 661           ac_cv_prog_cc_pic='+Z'
 662           ;;
 663         aCC)
 664           ac_cv_prog_cc_wl='-Wl,'
 665           ac_cv_prog_cc_static="${ac_cv_prog_cc_wl}-a ${ac_cv_prog_cc_wl}archive"
 666           ac_cv_prog_cc_pic='+Z'
 667           ;;
 668         *)
 669           ;;
 670       esac
 671       ;;
 672     irix5* | irix6*)
 673       case "$cc_basename" in
 674         CC)
 675           ac_cv_prog_cc_wl='-Wl,'
 676           ac_cv_prog_cc_static='-non_shared'
 677           ac_cv_prog_cc_pic='-KPIC'
 678           ;;
 679         *)
 680           ;;
 681       esac
 682       ;;
 683     linux*)
 684       case "$cc_basename" in
 685         KCC)
 686           # KAI C++ Compiler
 687           ac_cv_prog_cc_wl='--backend -Wl,'
 688           ac_cv_prog_cc_pic='-fPIC'
 689           ;;
 690         cxx)
 691           # Compaq C++
 692           # Make sure the PIC flag is empty.  It appears that all Alpha
 693           # Linux and Compaq Tru64 Unix objects are PIC.
 694           ac_cv_prog_cc_pic=
 695           ac_cv_prog_cc_static='-non_shared'
 696           ;;
 697         *)
 698           ;;
 699       esac
 700       ;;
 701     lynxos*)
 702       ;;
 703     m88k*)
 704       ;;
 705     mvs*)
 706       case "$cc_basename" in
 707         cxx)
 708           ac_cv_prog_cc_pic='-W c,exportall'
 709           ;;
 710         *)
 711           ;;
 712       esac
 713       ;;
 714     netbsd*)
 715       ;;
 716     osf3* | osf4* | osf5*)
 717       case "$cc_basename" in
 718         KCC)
 719           ac_cv_prog_cc_wl='--backend -Wl,'
 720           ;;
 721         RCC)
 722           # Rational C++ 2.4.1
 723           ac_cv_prog_cc_pic='-pic'
 724           ;;
 725         cxx)
 726           # Digital/Compaq C++
 727           ac_cv_prog_cc_wl='-Wl,'
 728           # Make sure the PIC flag is empty.  It appears that all Alpha
 729           # Linux and Compaq Tru64 Unix objects are PIC.
 730           ac_cv_prog_cc_pic=
 731           ac_cv_prog_cc_static='-non_shared'
 732           ;;
 733         *)
 734           ;;
 735       esac
 736       ;;
 737     psos*)
 738       ;;
 739     sco*)
 740       case "$cc_basename" in
 741         CC)
 742           ac_cv_prog_cc_pic='-fPIC'
 743           ;;
 744         *)
 745           ;;
 746       esac
 747       ;;
 748     solaris*)
 749       case "$cc_basename" in
 750         CC)
 751           # Sun C++ 4.2, 5.x and Centerline C++
 752           ac_cv_prog_cc_pic='-KPIC'
 753           ac_cv_prog_cc_static='-Bstatic'
 754           ac_cv_prog_cc_wl='-Qoption ld '
 755           ;;
 756         gcx)
 757           # Green Hills C++ Compiler
 758           ac_cv_prog_cc_pic='-PIC'
 759           ;;
 760         *)
 761           ;;
 762       esac
 763       ;;
 764     sunos4*)
 765       case "$cc_basename" in
 766         CC)
 767           # Sun C++ 4.x
 768           ac_cv_prog_cc_pic='-pic'
 769           ac_cv_prog_cc_static='-Bstatic'
 770           ;;
 771         lcc)
 772           # Lucid
 773           ac_cv_prog_cc_pic='-pic'
 774           ;;
 775         *)
 776           ;;
 777       esac
 778       ;;
 779     tandem*)
 780       case "$cc_basename" in
 781         NCC)
 782           # NonStop-UX NCC 3.20
 783           ac_cv_prog_cc_pic='-KPIC'
 784           ;;
 785         *)
 786           ;;
 787       esac
 788       ;;
 789     unixware*)
 790       ;;
 791     vxworks*)
 792       ;;
 793     *)
 794       ac_cv_prog_cc_can_build_shared=no
 795       ;;
 796   esac
 797 fi
 798
 799 case "$host_os" in
 800     # Platforms which do not suport PIC and -DPIC is meaningless
 801     # on them:
 802     *djgpp*)
 803       ac_cv_prog_cc_pic=
 804       ;;
 805     *)
 806       ac_cv_prog_cc_pic="$ac_cv_prog_cc_pic -DPIC"
 807       ;;
 808 esac
 809
 810
 811 # Figure out "hidden" C++ library dependencies from verbose
 812 # compiler output whening linking a shared library.
 813 cat > conftest.$ac_ext <<EOF
 814 class Foo
 815 {
 816 public:
 817   Foo (void) { a = 0; }
 818 private:
 819   int a;
 820 };
 821 EOF
 822
 823
 824 if (eval $ac_compile) 2>&5; then
 825   # Parse the compiler output and extract the necessary
 826   # objects, libraries and library flags.
 827
 828   # Sentinel used to keep track of whether or not we are before
 829   # the conftest object file.
 830   pre_test_object_deps_done=no
 831
 832   for p in `eval $output_verbose_link_cmds`; do
 833
 834     case $p in
 835
 836     -L* | -R* | -l*)
 837        # Some compilers place space between "-{L,R}" and the path.
 838        # Remove the space.
 839        if test $p = "-L" \
 840           || test $p = "-R"; then
 841          prev=$p
 842          continue
 843        else
 844          prev=
 845        fi
 846
 847        if test "$pre_test_object_deps_done" = no; then
 848          case $p in
 849          -L* | -R*)
 850            # Internal compiler library paths should come after those
 851            # provided the user.  The postdeps already come after the
 852            # user supplied libs so there is no need to process them.
 853            if test -z "$compiler_lib_search_path"; then
 854              compiler_lib_search_path="${prev}${p}"
 855            else
 856              compiler_lib_search_path="${compiler_lib_search_path} ${prev}${p}"
 857            fi
 858            ;;
 859          # The "-l" case would never come before the object being
 860          # linked, so don't bother handling this case.
 861          esac
 862        else
 863          if test -z "$postdeps"; then
 864            postdeps="${prev}${p}"
 865          else
 866            postdeps="${postdeps} ${prev}${p}"
 867          fi
 868        fi
 869        ;;
 870
 871     *.$objext)
 872        # This assumes that the test object file only shows up
 873        # once in the compiler output.
 874        if test "$p" = "conftest.$objext"; then
 875          pre_test_object_deps_done=yes
 876          continue
 877        fi
 878
 879        if test "$pre_test_object_deps_done" = no; then
 880          if test -z "$predep_objects"; then
 881            predep_objects="$p"
 882          else
 883            predep_objects="$predep_objects $p"
 884          fi
 885        else
 886          if test -z "$postdep_objects"; then
 887            postdep_objects="$p"
 888          else
 889            postdep_objects="$postdep_objects $p"
 890          fi
 891        fi
 892        ;;
 893
 894     *) ;; # Ignore the rest.
 895
 896     esac
 897   done
 898
 899   # Clean up.
 900   rm -f a.out
 901 else
 902   echo "ltcf-cxx.sh: error: problem compiling test program"
 903 fi
 904
 905 $rm -f confest.$objext
 906
 907 case " $postdeps " in
 908 *" -lc "*) need_lc=no ;;
 909 *) need_lc=yes ;;
 910 esac