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, 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
  66   with_gcc=yes
  67
  68   # Set up default GNU C++ configuration
  69
  70   # Check if GNU C++ uses GNU ld as the underlying linker, since the
  71   # archiving commands below assume that GNU ld is being used.  The
  72   # assumption here is that the linker is going to be the same as that
  73   # used by the C compiler.  For the purposes of GCC, this is ok, but
  74   # if someone uses g++ along with a non-GNU C compiler that doesn't
  75   # use GNU ld, we may lose.  This is ok for the toolchain tree, since
  76   # the only users of ltcf-cxx.sh are libstdc++-v3 and libjava,
  77   # anyway, and those use both gcc and g++, so the settings are bound
  78   # to be the same.
  79
  80   if test "$with_gnu_ld" = yes; then
  81     archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
  82     archive_expsym_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
  83
  84     hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
  85     export_dynamic_flag_spec='${wl}--export-dynamic'
  86
  87     # If archive_cmds runs LD, not CC, wlarc should be empty
  88     # XXX I think wlarc can be eliminated in ltcf-cxx, but I need to
  89     #     investigate it a little bit more. (MM)
  90     wlarc='${wl}'
  91
  92     # ancient GNU ld didn't support --whole-archive et. al.
  93     if eval "`$CC -print-prog-name=ld` --help 2>&1" | \
  94         egrep 'no-whole-archive' > /dev/null; then
  95       whole_archive_flag_spec="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
  96     else
  97       whole_archive_flag_spec=
  98     fi
  99   else
 100     wlarc=
 101
 102     # A generic and very simple default shared library creation
 103     # command for GNU C++ for the case where it uses the native
 104     # linker, instead of GNU ld.  If possible, this setting should
 105     # overridden to take advantage of the native linker features on
 106     # the platform it is being used on.
 107     archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -o $lib'
 108   fi
 109
 110   # Commands to make compiler produce verbose output that lists
 111   # what "hidden" libraries, object files and flags are used when
 112   # linking a shared library.
 113   output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'
 114
 115 else
 116   with_gcc=no
 117   wlarc=
 118 fi
 119
 120 # PORTME: fill in a description of your system's C++ link characteristics
 121 case $host_os in
 122   aix3*)
 123     # FIXME: insert proper C++ library support
 124     ld_shlibs=no
 125     ;;
 126   aix4* | aix5*)
 127     archive_cmds=''
 128     hardcode_direct=yes
 129     hardcode_libdir_separator=':'
 130     link_all_deplibs=yes
 131     file_list_spec='${wl}-f,'
 132     # When large executables or shared objects are built, AIX ld can
 133     # have problems creating the table of contents.  If linking a library
 134     # or program results in "error TOC overflow" add -mminimal-toc to
 135     # CXXFLAGS/CFLAGS for g++/gcc.  In the cases where that is not
 136     # enough to fix the problem, add -Wl,-bbigtoc to LDFLAGS.
 137     if test "$with_gcc" = yes; then
 138       case $host_os in aix4.[012]|aix4.[012].*)
 139       # We only want to do this on AIX 4.2 and lower, the check
 140       # below for broken collect2 doesn't work under 4.3+
 141         collect2name=`${CC} -print-prog-name=collect2`
 142         if test -f "$collect2name" && \
 143            strings "$collect2name" | grep resolve_lib_name >/dev/null
 144         then
 145           # We have reworked collect2
 146           hardcode_direct=yes
 147         else
 148           # We have old collect2
 149           hardcode_direct=unsupported
 150           # It fails to find uninstalled libraries when the uninstalled
 151           # path is not listed in the libpath.  Setting hardcode_minus_L
 152           # to unsupported forces relinking
 153           hardcode_minus_L=yes
 154           hardcode_libdir_flag_spec='-L$libdir'
 155           hardcode_libdir_separator=
 156         fi
 157       esac
 158       shared_flag='-shared'
 159     else
 160       # not using gcc
 161       if test "$host_cpu" = ia64; then
 162         shared_flag='${wl}-G'
 163       else
 164         shared_flag='${wl}-bM:SRE'
 165       fi
 166     fi
 167
 168     if test "$host_cpu" = ia64; then
 169       # On IA64, the linker does run time linking by default, so we don't
 170       # have to do anything special.
 171       aix_use_runtimelinking=no
 172       if test $with_gnu_ld = no; then
 173         exp_sym_flag='-Bexport'
 174         no_entry_flag=""
 175       fi
 176     else
 177       # Test if we are trying to use run time linking, or normal AIX style linking.
 178       # If -brtl is somewhere in LDFLAGS, we need to do run time linking.
 179       aix_use_runtimelinking=no
 180       for ld_flag in $LDFLAGS; do
 181         if (test $ld_flag = "-brtl" || test $ld_flag = "-Wl,-brtl" ); then
 182           aix_use_runtimelinking=yes
 183           break
 184         fi
 185       done
 186       exp_sym_flag='-bexport'
 187       no_entry_flag='-bnoentry'
 188     fi
 189     # It seems that -bexpall does not export symbols beginning with
 190     # underscore (_), so it is better to generate a list of symbols to export.
 191     always_export_symbols=yes
 192     if test "$aix_use_runtimelinking" = yes; then
 193       hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:/usr/lib:/lib'
 194       allow_undefined_flag=' -Wl,-G'
 195       archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${allow_undefined_flag} '"\${wl}$no_entry_flag \${wl}-brtl \${wl}$exp_sym_flag:\$export_symbols"
 196      else
 197       if test "$host_cpu" = ia64; then
 198         if test $with_gnu_ld = no; then
 199           hardcode_libdir_flag_spec='${wl}-R $libdir:/usr/lib:/lib'
 200           allow_undefined_flag="-z nodefs"
 201           archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${wl}${allow_undefined_flag} '"\${wl}$no_entry_flag \${wl}$exp_sym_flag:\$export_symbols"
 202         fi
 203       else
 204         hardcode_libdir_flag_spec='${wl}-blibpath:$libdir:/usr/lib:/lib'
 205         # Warning - without using the other run time loading flags, -berok will
 206         #           link without error, but may produce a broken library.
 207         no_undefined_flag=' ${wl}-bnoerok'
 208         allow_undefined_flag=' ${wl}-berok'
 209         # -bexpall does not export symbols beginning with underscore (_)
 210         always_export_symbols=yes
 211         # Exported symbols can be pulled into shared objects from archives
 212         whole_archive_flag_spec=' '
 213         build_libtool_need_lc=yes
 214         # This is similar to how AIX traditionally builds it's shared libraries.
 215         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'
 216       fi
 217     fi
 218     ;;
 219   chorus*)
 220     case $cc_basename in
 221       *)
 222         # FIXME: insert proper C++ library support
 223         ld_shlibs=no
 224         ;;
 225     esac
 226     ;;
 227
 228   darwin* | rhapsody*)
 229     case "$host_os" in
 230         rhapsody* | darwin1.[[012]])
 231             allow_undefined_flag='-undefined suppress'
 232         ;;
 233         *) # Darwin 1.3 on
 234             if test -z ${MACOSX_DEPLOYMENT_TARGET} ; then
 235                 allow_undefined_flag='-flat_namespace -undefined suppress'
 236       else
 237         case ${MACOSX_DEPLOYMENT_TARGET} in
 238             10.[[012]])
 239                 allow_undefined_flag='-flat_namespace -undefined suppress'
 240             ;;
 241             10.*)
 242                 allow_undefined_flag='-undefined dynamic_lookup'
 243             ;;
 244         esac
 245     fi
 246     ;;
 247     esac
 248     # Disable shared library build on OS-X older than 10.3.
 249     case $host_os in
 250         darwin[1-6]*)
 251             can_build_shared=no
 252             ;;
 253         darwin7*)
 254             can_build_shared=yes
 255             ;;
 256     esac
 257     output_verbose_link_cmd='echo'
 258
 259     archive_cmds='$CXX -dynamiclib $allow_undefined_flag -o $lib $libobjs $deplibs $compiler_flags -install_name $rpath/$soname $verstring'
 260     module_cmds='$CC ${wl}-bind_at_load $allow_undefined_flag -o $lib -bundle $libobjs $deplibs$compiler_flags'
 261
 262     # Don't fix this by using the ld -exported_symbols_list flag,
 263     # it doesn't exist in older darwin ld's
 264     archive_expsym_cmds='sed -e "s,#.*,," -e "s,^[    ]*,," -e "s,^\(..*\),_&," < $export_symbols > $output_objdir/${libname}-symbols.expsym~$CC -r ${wl}-bind_at_load -keep_private_externs -nostdlib -o ${lib}-master.o $libobjs~$CC -dynamiclib $allow_undefined_flag -o $lib ${lib}-master.o $deplibs $compiler_flags -install_name $rpath/$soname $verstring~nmedit -s $output_objdir/${libname}-symbols.expsym ${lib}'
 265     module_expsym_cmds='sed -e "s,#.*,," -e "s,^[    ]*,," -e "s,^\(..*\),_&," < $export_symbols > $output_objdir/${libname}-symbols.expsym~$CC $allow_undefined_flag  -o $lib -bundle $libobjs $deplibs$compiler_flags~nmedit -s $output_objdir/${libname}-symbols.expsym ${lib}'
 266     hardcode_direct=no
 267     hardcode_automatic=yes
 268     hardcode_shlibpath_var=unsupported
 269     link_all_deplibs=yes
 270     ;;
 271
 272   dgux*)
 273     case $cc_basename in
 274       ec++)
 275         # FIXME: insert proper C++ library support
 276         ld_shlibs=no
 277         ;;
 278       ghcx)
 279         # Green Hills C++ Compiler
 280         # FIXME: insert proper C++ library support
 281         ld_shlibs=no
 282         ;;
 283       *)
 284         # FIXME: insert proper C++ library support
 285         ld_shlibs=no
 286         ;;
 287     esac
 288     ;;
 289   freebsd[12]*)
 290     # C++ shared libraries reported to be fairly broken before switch to ELF
 291     ld_shlibs=no
 292     ;;
 293   freebsd* | kfreebsd*-gnu)
 294     # FreeBSD 3 and later use GNU C++ and GNU ld with standard ELF
 295     # conventions
 296     ld_shlibs=yes
 297     ;;
 298   gnu*)
 299     ;;
 300   hpux*)
 301     if test $with_gnu_ld = no; then
 302       case "$host_cpu" in
 303         ia64*)
 304           hardcode_libdir_flag_spec='-L$libdir'
 305           hardcode_shlibpath_var=no ;;
 306         *)
 307           hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir' ;;
 308       esac
 309       hardcode_direct=yes
 310       hardcode_libdir_separator=:
 311       export_dynamic_flag_spec='${wl}-E'
 312     fi
 313     hardcode_minus_L=yes # Not in the search PATH, but as the default
 314                          # location of the library.
 315
 316     case $cc_basename in
 317       CC)
 318         # FIXME: insert proper C++ library support
 319         ld_shlibs=no
 320         ;;
 321       aCC)
 322         case $host_os in
 323         hpux9*) archive_cmds='$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 $lib' ;;
 324         *) archive_cmds='$CC -b ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' ;;
 325         esac
 326         # Commands to make compiler produce verbose output that lists
 327         # what "hidden" libraries, object files and flags are used when
 328         # linking a shared library.
 329         #
 330         # There doesn't appear to be a way to prevent this compiler from
 331         # explicitly linking system object files so we need to strip them
 332         # from the output so that they don't get included in the library
 333         # dependencies.
 334         output_verbose_link_cmd='templist=`($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'
 335         ;;
 336       *)
 337         if test $with_gcc = yes; then
 338           if test $with_gnu_ld = no; then
 339             case "$host_os" in
 340             hpux9*) archive_cmds='$rm $output_objdir/$soname~$CC -shared -nostdlib -fPIC ${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 $lib' ;;
 341             *)
 342               case "$host_cpu" in
 343                 ia64*)
 344                   archive_cmds='$LD -b +h $soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $linker_flags' ;;
 345                 *)
 346                   archive_cmds='$CC -shared -nostdlib -fPIC ${wl}+h ${wl}$soname ${wl}+b ${wl}$install_libdir -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags' ;;
 347               esac
 348               ;;
 349             esac
 350           fi
 351         else
 352           # FIXME: insert proper C++ library support
 353           ld_shlibs=no
 354         fi
 355         ;;
 356     esac
 357     ;;
 358   irix5* | irix6*)
 359     case $cc_basename in
 360       CC)
 361         # SGI C++
 362         archive_cmds='$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 $lib'
 363
 364         # Archives containing C++ object files must be created using
 365         # "CC -ar", where "CC" is the IRIX C++ compiler.  This is
 366         # necessary to make sure instantiated templates are included
 367         # in the archive.
 368         old_archive_cmds='$CC -ar -WR,-u -o $oldlib $oldobjs'
 369         ;;
 370       *)
 371         if test "$with_gcc" = yes; then
 372           if test "$with_gnu_ld" = no; then
 373             archive_cmds='$CC -shared -nostdlib $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 $lib'
 374           else
 375             archive_cmds='$CC -shared -nostdlib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && echo -set_version $verstring` -o $lib'
 376           fi
 377         fi
 378         hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 379         hardcode_libdir_separator=:
 380         link_all_deplibs=yes
 381         ;;
 382     esac
 383     ;;
 384   linux*)
 385     case $cc_basename in
 386       KCC)
 387         # Kuck and Associates, Inc. (KAI) C++ Compiler
 388
 389         # KCC will only create a shared library if the output file
 390         # ends with ".so" (or ".sl" for HP-UX), so rename the library
 391         # to its proper name (with version) after linking.
 392         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'
 393         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 $lib'
 394
 395         # Commands to make compiler produce verbose output that lists
 396         # what "hidden" libraries, object files and flags are used when
 397         # linking a shared library.
 398         #
 399         # There doesn't appear to be a way to prevent this compiler from
 400         # explicitly linking system object files so we need to strip them
 401         # from the output so that they don't get included in the library
 402         # dependencies.
 403         output_verbose_link_cmd='templist=`$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 $list'
 404
 405         hardcode_libdir_flag_spec='${wl}--rpath,$libdir'
 406         export_dynamic_flag_spec='${wl}--export-dynamic'
 407
 408         # Archives containing C++ object files must be created using
 409         # "CC -Bstatic", where "CC" is the KAI C++ compiler.
 410         old_archive_cmds='$CC -Bstatic -o $oldlib $oldobjs'
 411         ;;
 412       cxx)
 413         # Compaq C++
 414         archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname -o $lib'
 415         archive_expsym_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-soname $wl$soname  -o $lib ${wl}-retain-symbols-file $wl$export_symbols'
 416
 417         runpath_var=LD_RUN_PATH
 418         hardcode_libdir_flag_spec='-rpath $libdir'
 419         hardcode_libdir_separator=:
 420
 421         # Commands to make compiler produce verbose output that lists
 422         # what "hidden" libraries, object files and flags are used when
 423         # linking a shared library.
 424         #
 425         # There doesn't appear to be a way to prevent this compiler from
 426         # explicitly linking system object files so we need to strip them
 427         # from the output so that they don't get included in the library
 428         # dependencies.
 429         output_verbose_link_cmd='templist=`$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'
 430         ;;
 431     esac
 432     ;;
 433   lynxos*)
 434     # FIXME: insert proper C++ library support
 435     ld_shlibs=no
 436     ;;
 437   m88k*)
 438     # FIXME: insert proper C++ library support
 439     ld_shlibs=no
 440     ;;
 441   mvs*)
 442     case $cc_basename in
 443       cxx)
 444         # FIXME: insert proper C++ library support
 445         ld_shlibs=no
 446         ;;
 447       *)
 448         # FIXME: insert proper C++ library support
 449         ld_shlibs=no
 450         ;;
 451     esac
 452     ;;
 453   netbsd* | knetbsd*-gnu)
 454     # NetBSD uses g++ - do we need to do anything?
 455     ;;
 456   osf3*)
 457     case $cc_basename in
 458       KCC)
 459         # Kuck and Associates, Inc. (KAI) C++ Compiler
 460
 461         # KCC will only create a shared library if the output file
 462         # ends with ".so" (or ".sl" for HP-UX), so rename the library
 463         # to its proper name (with version) after linking.
 464         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 $lib'
 465
 466         hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
 467         hardcode_libdir_separator=:
 468
 469         # Archives containing C++ object files must be created using
 470         # "CC -Bstatic", where "CC" is the KAI C++ compiler.
 471         old_archive_cmds='$CC -Bstatic -o $oldlib $oldobjs'
 472
 473         ;;
 474       RCC)
 475         # Rational C++ 2.4.1
 476         # FIXME: insert proper C++ library support
 477         ld_shlibs=no
 478         ;;
 479       cxx)
 480         allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 481         archive_cmds='$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 $lib'
 482
 483         hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 484         hardcode_libdir_separator=:
 485
 486         # Commands to make compiler produce verbose output that lists
 487         # what "hidden" libraries, object files and flags are used when
 488         # linking a shared library.
 489         #
 490         # There doesn't appear to be a way to prevent this compiler from
 491         # explicitly linking system object files so we need to strip them
 492         # from the output so that they don't get included in the library
 493         # dependencies.
 494         output_verbose_link_cmd='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 $list'
 495         ;;
 496       *)
 497         if test "$with_gcc" = yes && test "$with_gnu_ld" = no; then
 498           allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 499           archive_cmds='$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 $lib'
 500
 501           hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 502           hardcode_libdir_separator=:
 503
 504           # Commands to make compiler produce verbose output that lists
 505           # what "hidden" libraries, object files and flags are used when
 506           # linking a shared library.
 507           output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'
 508     else
 509           # FIXME: insert proper C++ library support
 510           ld_shlibs=no
 511     fi
 512         ;;
 513     esac
 514     ;;
 515   osf4* | osf5*)
 516     case $cc_basename in
 517       KCC)
 518         # Kuck and Associates, Inc. (KAI) C++ Compiler
 519
 520         # KCC will only create a shared library if the output file
 521         # ends with ".so" (or ".sl" for HP-UX), so rename the library
 522         # to its proper name (with version) after linking.
 523         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 $lib'
 524
 525         hardcode_libdir_flag_spec='${wl}-rpath,$libdir'
 526         hardcode_libdir_separator=:
 527
 528         # Archives containing C++ object files must be created using
 529         # the KAI C++ compiler.
 530         old_archive_cmds='$CC -o $oldlib $oldobjs'
 531         ;;
 532       RCC)
 533         # Rational C++ 2.4.1
 534         # FIXME: insert proper C++ library support
 535         ld_shlibs=no
 536         ;;
 537       cxx)
 538         allow_undefined_flag=' -expect_unresolved \*'
 539         archive_cmds='$CC -shared${allow_undefined_flag} $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
 540         archive_expsym_cmds='for i in `cat $export_symbols`; do printf "-exported_symbol " >> $lib.exp; echo "\$i" >> $lib.exp; done~
 541           echo "-hidden">> $lib.exp~
 542           $CC -shared$allow_undefined_flag $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags -msym -soname $soname -Wl,-input -Wl,$lib.exp  `test -n "$verstring" && echo -set_version $verstring` -update_registry $objdir/so_locations -o $lib~
 543           $rm $lib.exp'
 544
 545         hardcode_libdir_flag_spec='-rpath $libdir'
 546         hardcode_libdir_separator=:
 547
 548         # Commands to make compiler produce verbose output that lists
 549         # what "hidden" libraries, object files and flags are used when
 550         # linking a shared library.
 551         #
 552         # There doesn't appear to be a way to prevent this compiler from
 553         # explicitly linking system object files so we need to strip them
 554         # from the output so that they don't get included in the library
 555         # dependencies.
 556         output_verbose_link_cmd='templist=`$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 $list'
 557         ;;
 558       *)
 559         if test "$with_gcc" = yes && test "$with_gnu_ld" = no; then
 560           allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 561           archive_cmds='$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 $lib'
 562
 563           hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 564           hardcode_libdir_separator=:
 565
 566           # Commands to make compiler produce verbose output that lists
 567           # what "hidden" libraries, object files and flags are used when
 568           # linking a shared library.
 569           output_verbose_link_cmd='$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep "\-L"'
 570     else
 571           # FIXME: insert proper C++ library support
 572           ld_shlibs=no
 573     fi
 574         ;;
 575     esac
 576     ;;
 577   psos*)
 578     # FIXME: insert proper C++ library support
 579     ld_shlibs=no
 580     ;;
 581   sco*)
 582     case $cc_basename in
 583       CC)
 584         # FIXME: insert proper C++ library support
 585         ld_shlibs=no
 586         ;;
 587       *)
 588         # FIXME: insert proper C++ library support
 589         ld_shlibs=no
 590         ;;
 591     esac
 592     ;;
 593   sunos4*)
 594     case $cc_basename in
 595       CC)
 596         # Sun C++ 4.x
 597         # FIXME: insert proper C++ library support
 598         ld_shlibs=no
 599         ;;
 600       lcc)
 601         # Lucid
 602         # FIXME: insert proper C++ library support
 603         ld_shlibs=no
 604         ;;
 605       *)
 606         # FIXME: insert proper C++ library support
 607         ld_shlibs=no
 608         ;;
 609     esac
 610     ;;
 611   solaris*)
 612     case $cc_basename in
 613       CC)
 614         # Sun C++ 4.2, 5.x and Centerline C++
 615         no_undefined_flag=' -zdefs'
 616         archive_cmds='$CC -G${allow_undefined_flag} -nolib -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags'
 617         archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 618         $CC -G${allow_undefined_flag} -nolib ${wl}-M ${wl}$lib.exp -h$soname -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$rm $lib.exp'
 619
 620         hardcode_libdir_flag_spec='-R$libdir'
 621         hardcode_shlibpath_var=no
 622         case $host_os in
 623           solaris2.[0-5] | solaris2.[0-5].*) ;;
 624           *)
 625             # The C++ compiler is used as linker so we must use $wl
 626             # flag to pass the commands to the underlying system
 627             # linker.
 628             # Supported since Solaris 2.6 (maybe 2.5.1?)
 629             whole_archive_flag_spec='${wl}-z ${wl}allextract$convenience ${wl}-z ${wl}defaultextract'
 630             ;;
 631         esac
 632         link_all_deplibs=yes
 633
 634         # Commands to make compiler produce verbose output that lists
 635         # what "hidden" libraries, object files and flags are used when
 636         # linking a shared library.
 637         #
 638         # There doesn't appear to be a way to prevent this compiler from
 639         # explicitly linking system object files so we need to strip them
 640         # from the output so that they don't get included in the library
 641         # dependencies.
 642         output_verbose_link_cmd='templist=`$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 $list'
 643
 644         # Archives containing C++ object files must be created using
 645         # "CC -xar", where "CC" is the Sun C++ compiler.  This is
 646         # necessary to make sure instantiated templates are included
 647         # in the archive.
 648         old_archive_cmds='$CC -xar -o $oldlib $oldobjs'
 649         ;;
 650       gcx)
 651         # Green Hills C++ Compiler
 652         archive_cmds='$CC -shared $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib'
 653
 654         # The C++ compiler must be used to create the archive.
 655         old_archive_cmds='$CC $LDFLAGS -archive -o $oldlib $oldobjs'
 656         ;;
 657       *)
 658         # GNU C++ compiler with Solaris linker
 659         if test "$with_gcc" = yes && test "$with_gnu_ld" = no; then
 660           no_undefined_flag=' ${wl}-z ${wl}defs'
 661           if $CC --version | egrep -v '^2\.7' > /dev/null; then
 662             archive_cmds='$CC -shared -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib'
 663             archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 664                 $CC -shared -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$rm $lib.exp'
 665
 666             # Commands to make compiler produce verbose output that lists
 667             # what "hidden" libraries, object files and flags are used when
 668             # linking a shared library.
 669             output_verbose_link_cmd="$CC -shared $CFLAGS -v conftest.$objext 2>&1 | egrep \"\-L\""
 670           else
 671             # g++ 2.7 appears to require `-G' NOT `-shared' on this
 672             # platform.
 673             archive_cmds='$CC -G -nostdlib $LDFLAGS $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags ${wl}-h $wl$soname -o $lib'
 674             archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 675                 $CC -G -nostdlib ${wl}-M $wl$lib.exp -o $lib $predep_objects $libobjs $deplibs $postdep_objects $compiler_flags~$rm $lib.exp'
 676
 677             # Commands to make compiler produce verbose output that lists
 678             # what "hidden" libraries, object files and flags are used when
 679             # linking a shared library.
 680             output_verbose_link_cmd="$CC -G $CFLAGS -v conftest.$objext 2>&1 | egrep \"\-L\""
 681           fi
 682
 683           hardcode_libdir_flag_spec='${wl}-R $wl$libdir'
 684         fi
 685         ;;
 686     esac
 687     ;;
 688   tandem*)
 689     case $cc_basename in
 690       NCC)
 691         # NonStop-UX NCC 3.20
 692         # FIXME: insert proper C++ library support
 693         ld_shlibs=no
 694         ;;
 695       *)
 696         # FIXME: insert proper C++ library support
 697         ld_shlibs=no
 698         ;;
 699     esac
 700     ;;
 701   tpf*)
 702     ld_shlibs=yes
 703     ;;
 704   unixware*)
 705     # FIXME: insert proper C++ library support
 706     ld_shlibs=no
 707     ;;
 708   vxworks*)
 709     # FIXME: insert proper C++ library support
 710     ld_shlibs=no
 711     ;;
 712   *)
 713     # FIXME: insert proper C++ library support
 714     ld_shlibs=no
 715     ;;
 716 esac
 717
 718
 719 ## Compiler Characteristics: PIC flags, static flags, etc
 720
 721 # We don't use cached values here since only the C compiler
 722 # characteristics should be cached.
 723 ac_cv_prog_cc_pic=
 724 ac_cv_prog_cc_shlib=
 725 ac_cv_prog_cc_wl=
 726 ac_cv_prog_cc_static=
 727 ac_cv_prog_cc_no_builtin=
 728 ac_cv_prog_cc_can_build_shared=$can_build_shared
 729
 730 ac_cv_prog_cc_pic_works=
 731 ac_cv_prog_cc_static_works=
 732
 733 if test "$with_gcc" = yes; then
 734   ac_cv_prog_cc_wl='-Wl,'
 735   ac_cv_prog_cc_static='-static'
 736
 737   case $host_os in
 738   aix*)
 739     # All AIX code is PIC.
 740     if test "$host_cpu" = ia64; then
 741       # AIX 5 now supports IA64 processor
 742       lt_cv_prog_cc_static='-Bstatic'
 743     else
 744       lt_cv_prog_cc_static='-bnso -bI:/lib/syscalls.exp'
 745     fi
 746     ;;
 747   amigaos*)
 748     # FIXME: we need at least 68020 code to build shared libraries, but
 749     # adding the `-m68020' flag to GCC prevents building anything better,
 750     # like `-m68040'.
 751     ac_cv_prog_cc_pic='-m68020 -resident32 -malways-restore-a4'
 752     ;;
 753   beos* | irix5* | irix6* | osf3* | osf4* | osf5*)
 754     # PIC is the default for these OSes.
 755     ;;
 756   cygwin* | mingw* | os2*)
 757     # This hack is so that the source file can tell whether it is being
 758     # built for inclusion in a dll (and should export symbols for example).
 759     ac_cv_prog_cc_pic='-DDLL_EXPORT'
 760     ;;
 761   darwin* | rhapsody*)
 762     # PIC is the default on this platform
 763     # Common symbols not allowed in MH_DYLIB files
 764     ac_cv_prog_cc_pic='-fno-common'
 765     ;;
 766   *djgpp*)
 767     # DJGPP does not support shared libraries at all
 768     ac_cv_prog_cc_pic=
 769     ;;
 770   sysv4*MP*)
 771     if test -d /usr/nec; then
 772       ac_cv_prog_cc_pic=-Kconform_pic
 773     fi
 774     ;;
 775   *)
 776     ac_cv_prog_cc_pic='-fPIC'
 777     ;;
 778   esac
 779 else
 780   case $host_os in
 781     aix4* | aix5*)
 782       # All AIX code is PIC.
 783       if test "$host_cpu" = ia64; then
 784         # AIX 5 now supports IA64 processor
 785         lt_cv_prog_cc_static='-Bstatic'
 786       else
 787         lt_cv_prog_cc_static='-bnso -bI:/lib/syscalls.exp'
 788       fi
 789       ;;
 790     chorus*)
 791       case $cc_basename in
 792       cxch68)
 793         # Green Hills C++ Compiler
 794         # 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"
 795         ;;
 796       esac
 797       ;;
 798     dgux*)
 799       case $cc_basename in
 800         ec++)
 801           ac_cv_prog_cc_pic='-KPIC'
 802           ;;
 803         ghcx)
 804           # Green Hills C++ Compiler
 805           ac_cv_prog_cc_pic='-pic'
 806           ;;
 807         *)
 808           ;;
 809       esac
 810       ;;
 811     freebsd* | kfreebsd*-gnu)
 812       # FreeBSD uses GNU C++
 813       ;;
 814     gnu*)
 815       ;;
 816     hpux9* | hpux10* | hpux11*)
 817       case $cc_basename in
 818         CC)
 819           ac_cv_prog_cc_wl='-Wl,'
 820           ac_cv_prog_cc_static="${ac_cv_prog_cc_wl}-a ${ac_cv_prog_cc_wl}archive"
 821           ac_cv_prog_cc_pic='+Z'
 822           ;;
 823         aCC)
 824           ac_cv_prog_cc_wl='-Wl,'
 825           ac_cv_prog_cc_static="${ac_cv_prog_cc_wl}-a ${ac_cv_prog_cc_wl}archive"
 826           ac_cv_prog_cc_pic='+Z'
 827           ;;
 828         *)
 829           ;;
 830       esac
 831       ;;
 832     irix5* | irix6*)
 833       case $cc_basename in
 834         CC)
 835           ac_cv_prog_cc_wl='-Wl,'
 836           ac_cv_prog_cc_static='-non_shared'
 837           ac_cv_prog_cc_pic='-KPIC'
 838           ;;
 839         *)
 840           ;;
 841       esac
 842       ;;
 843     linux*)
 844       case $cc_basename in
 845         KCC)
 846           # KAI C++ Compiler
 847           ac_cv_prog_cc_wl='--backend -Wl,'
 848           ac_cv_prog_cc_pic='-fPIC'
 849           ;;
 850         cxx)
 851           # Compaq C++
 852           # Make sure the PIC flag is empty.  It appears that all Alpha
 853           # Linux and Compaq Tru64 Unix objects are PIC.
 854           ac_cv_prog_cc_pic=
 855           ac_cv_prog_cc_static='-non_shared'
 856           ;;
 857         *)
 858           ;;
 859       esac
 860       ;;
 861     lynxos*)
 862       ;;
 863     m88k*)
 864       ;;
 865     mvs*)
 866       case $cc_basename in
 867         cxx)
 868           ac_cv_prog_cc_pic='-W c,exportall'
 869           ;;
 870         *)
 871           ;;
 872       esac
 873       ;;
 874     netbsd*)
 875       ;;
 876     osf3* | osf4* | osf5*)
 877       case $cc_basename in
 878         KCC)
 879           ac_cv_prog_cc_wl='--backend -Wl,'
 880           ;;
 881         RCC)
 882           # Rational C++ 2.4.1
 883           ac_cv_prog_cc_pic='-pic'
 884           ;;
 885         cxx)
 886           # Digital/Compaq C++
 887           ac_cv_prog_cc_wl='-Wl,'
 888           # Make sure the PIC flag is empty.  It appears that all Alpha
 889           # Linux and Compaq Tru64 Unix objects are PIC.
 890           ac_cv_prog_cc_pic=
 891           ac_cv_prog_cc_static='-non_shared'
 892           ;;
 893         *)
 894           ;;
 895       esac
 896       ;;
 897     psos*)
 898       ;;
 899     sco*)
 900       case $cc_basename in
 901         CC)
 902           ac_cv_prog_cc_pic='-fPIC'
 903           ;;
 904         *)
 905           ;;
 906       esac
 907       ;;
 908     solaris*)
 909       case $cc_basename in
 910         CC)
 911           # Sun C++ 4.2, 5.x and Centerline C++
 912           ac_cv_prog_cc_pic='-KPIC'
 913           ac_cv_prog_cc_static='-Bstatic'
 914           ac_cv_prog_cc_wl='-Qoption ld '
 915           ;;
 916         gcx)
 917           # Green Hills C++ Compiler
 918           ac_cv_prog_cc_pic='-PIC'
 919           ;;
 920         *)
 921           ;;
 922       esac
 923       ;;
 924     sunos4*)
 925       case $cc_basename in
 926         CC)
 927           # Sun C++ 4.x
 928           ac_cv_prog_cc_pic='-pic'
 929           ac_cv_prog_cc_static='-Bstatic'
 930           ;;
 931         lcc)
 932           # Lucid
 933           ac_cv_prog_cc_pic='-pic'
 934           ;;
 935         *)
 936           ;;
 937       esac
 938       ;;
 939     tandem*)
 940       case $cc_basename in
 941         NCC)
 942           # NonStop-UX NCC 3.20
 943           ac_cv_prog_cc_pic='-KPIC'
 944           ;;
 945         *)
 946           ;;
 947       esac
 948       ;;
 949     unixware*)
 950       ;;
 951     vxworks*)
 952       ;;
 953     *)
 954       ac_cv_prog_cc_can_build_shared=no
 955       ;;
 956   esac
 957 fi
 958
 959 case "$host_os" in
 960     # Platforms which do not suport PIC and -DPIC is meaningless
 961     # on them:
 962     *djgpp*)
 963       ac_cv_prog_cc_pic=
 964       ;;
 965     *)
 966       ac_cv_prog_cc_pic="$ac_cv_prog_cc_pic -DPIC"
 967       ;;
 968 esac
 969
 970
 971 # Figure out "hidden" C++ library dependencies from verbose
 972 # compiler output whening linking a shared library.
 973 cat > conftest.$ac_ext <<EOF
 974 class Foo
 975 {
 976 public:
 977   Foo (void) { a = 0; }
 978 private:
 979   int a;
 980 };
 981 EOF
 982
 983
 984 if (eval $ac_compile) 2>&5; then
 985   # Parse the compiler output and extract the necessary
 986   # objects, libraries and library flags.
 987
 988   # Sentinel used to keep track of whether or not we are before
 989   # the conftest object file.
 990   pre_test_object_deps_done=no
 991
 992   for p in `eval $output_verbose_link_cmd`; do
 993
 994     case $p in
 995
 996     -L* | -R* | -l*)
 997        # Some compilers place space between "-{L,R}" and the path.
 998        # Remove the space.
 999        if test $p = "-L" \
1000           || test $p = "-R"; then
1001          prev=$p
1002          continue
1003        else
1004          prev=
1005        fi
1006
1007        if test "$pre_test_object_deps_done" = no; then
1008          case $p in
1009          -L* | -R*)
1010            # Internal compiler library paths should come after those
1011            # provided the user.  The postdeps already come after the
1012            # user supplied libs so there is no need to process them.
1013            if test -z "$compiler_lib_search_path"; then
1014              compiler_lib_search_path="${prev}${p}"
1015            else
1016              compiler_lib_search_path="${compiler_lib_search_path} ${prev}${p}"
1017            fi
1018            ;;
1019          # The "-l" case would never come before the object being
1020          # linked, so don't bother handling this case.
1021          esac
1022        else
1023          if test -z "$postdeps"; then
1024            postdeps="${prev}${p}"
1025          else
1026            postdeps="${postdeps} ${prev}${p}"
1027          fi
1028        fi
1029        ;;
1030
1031     *.$objext)
1032        # This assumes that the test object file only shows up
1033        # once in the compiler output.
1034        if test "$p" = "conftest.$objext"; then
1035          pre_test_object_deps_done=yes
1036          continue
1037        fi
1038
1039        if test "$pre_test_object_deps_done" = no; then
1040          if test -z "$predep_objects"; then
1041            predep_objects="$p"
1042          else
1043            predep_objects="$predep_objects $p"
1044          fi
1045        else
1046          if test -z "$postdep_objects"; then
1047            postdep_objects="$p"
1048          else
1049            postdep_objects="$postdep_objects $p"
1050          fi
1051        fi
1052        ;;
1053
1054     *) ;; # Ignore the rest.
1055
1056     esac
1057   done
1058
1059   # Clean up.
1060   rm -f a.out
1061 else
1062   echo "ltcf-cxx.sh: error: problem compiling test program"
1063 fi
1064
1065 $rm -f confest.$objext
1066
1067 case " $postdeps " in
1068 *" -lc "*) need_lc=no ;;
1069 *) need_lc=yes ;;
1070 esac