ltcf-cxx.sh

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  beos* | irix5* | irix6* | osf3* | osf4* | osf5*)
    # PIC is the default for these OSes.
    ;;
  aix*)
    # Below there is a dirty hack to force normal static linking with -ldl
    # The problem is because libdl dynamically linked with both libc and
    # libC (AIX C++ library), which obviously doesn't included in libraries
    # list by gcc. This cause undefined symbols with -static flags.
    # This hack allows C programs to be linked with "-static -ldl", but
    # we not sure about C++ programs.
    ac_cv_prog_cc_static="$ac_cv_prog_cc_static ${ac_cv_prog_cc_wl}-lC"
    ;;
  cygwin* | mingw* | os2*)
    # This hack is so that the source file can tell whether it is being
    # built for inclusion in a dll (and should export symbols for example).
    ac_cv_prog_cc_pic='-DDLL_EXPORT'
    ;;
  amigaos*)
    # FIXME: we need at least 68020 code to build shared libraries, but
    # adding the `-m68020' flag to GCC prevents building anything better,
    # like `-m68040'.
    ac_cv_prog_cc_pic='-m68020 -resident32 -malways-restore-a4'
    ;;
  sysv4*MP*)
    if test -d /usr/nec; then
      ac_cv_prog_cc_pic=-Kconform_pic
    fi
    ;;
  *)
    ac_cv_prog_cc_pic='-fPIC'
    ;;
  esac
else
  case "$host_os" in
    aix4*)
      # All AIX code is PIC.
      ;;
    chorus*)
      case "$cc_basename" in
      cxch68)
        # Green Hills C++ Compiler
        # 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 $MVME_DIR/lib/classix/libcx.s.a"
        ;;
      esac 
      ;;
    dgux*)
      case "$cc_basename" in
        ec++)
          ac_cv_prog_cc_pic='-KPIC'
          ;;
        ghcx)
          # Green Hills C++ Compiler
          ac_cv_prog_cc_pic='-pic'
          ;;
        *)
          ;;
      esac
      ;;
    freebsd*)
      # FreeBSD uses GNU C++
      ;;
    hpux9* | hpux10* | hpux11*)
      case "$cc_basename" in
        CC)
          ac_cv_prog_cc_wl='-Wl,'
          ac_cv_prog_cc_static="${ac_cv_prog_cc_wl}-a ${ac_cv_prog_cc_wl}archive"
          ac_cv_prog_cc_pic='+Z'
          ;;
        aCC)
          ac_cv_prog_cc_wl='-Wl,'
          ac_cv_prog_cc_static="${ac_cv_prog_cc_wl}-a ${ac_cv_prog_cc_wl}archive"
          ac_cv_prog_cc_pic='+Z'
          ;;
        *)
          ;;
      esac
      ;;
    irix5* | irix6*)
      case "$cc_basename" in
        CC)
          ac_cv_prog_cc_wl='-Wl,'
          ac_cv_prog_cc_static='-non_shared'
          ac_cv_prog_cc_pic='-KPIC'
          ;;
        *)
          ;;
      esac
      ;;
    linux*)
      case "$cc_basename" in
        KCC)
          # KAI C++ Compiler
          ac_cv_prog_cc_wl='--backend -Wl,'
          ac_cv_prog_cc_pic='-fPIC'
          ;;
        cxx)
          # Compaq C++
          # Make sure the PIC flag is empty.  It appears that all Alpha
          # Linux and Compaq Tru64 Unix objects are PIC.
          ac_cv_prog_cc_pic=
          ac_cv_prog_cc_static='-non_shared'
          ;;
        *)
          ;;
      esac
      ;;
    lynxos*)
      ;;
    m88k*)
      ;;
    mvs*)
      case "$cc_basename" in
        cxx)
          ac_cv_prog_cc_pic='-W c,exportall'
          ;;
        *)
          ;;
      esac   
      ;;
    netbsd*)
      ;;
    osf3* | osf4* | osf5*)
      case "$cc_basename" in
        KCC)
          ac_cv_prog_cc_wl='--backend -Wl,'
          ;;
        RCC)
          # Rational C++ 2.4.1
          ac_cv_prog_cc_pic='-pic'
          ;;
        cxx)
          # Digital/Compaq C++
          ac_cv_prog_cc_wl='-Wl,'
          # Make sure the PIC flag is empty.  It appears that all Alpha
          # Linux and Compaq Tru64 Unix objects are PIC.
          ac_cv_prog_cc_pic=
          ac_cv_prog_cc_static='-non_shared'
          ;;
        *)
          ;;
      esac
      ;;
    psos*)
      ;;
    sco*)
      case "$cc_basename" in
        CC)
          ac_cv_prog_cc_pic='-fPIC'
          ;;
        *)
          ;;
      esac
      ;;
    solaris*)
      case "$cc_basename" in
        CC)
          # Sun C++ 4.2, 5.x and Centerline C++
          ac_cv_prog_cc_pic='-KPIC'
          ac_cv_prog_cc_static='-Bstatic'
          ac_cv_prog_cc_wl='-Qoption ld '
          ;;
        gcx)
          # Green Hills C++ Compiler
          ac_cv_prog_cc_pic='-PIC'
          ;;
        *)
          ;;
      esac   
      ;;
    sunos4*)
      case "$cc_basename" in
        CC)
          # Sun C++ 4.x
          ac_cv_prog_cc_pic='-pic'
          ac_cv_prog_cc_static='-Bstatic'
          ;;
        lcc)
          # Lucid
          ac_cv_prog_cc_pic='-pic'
          ;;
        *)
          ;;
      esac
      ;;
    tandem*)
      case "$cc_basename" in
        NCC)
          # NonStop-UX NCC 3.20
          ac_cv_prog_cc_pic='-KPIC'
          ;;
        *)
          ;;
      esac   
      ;;
    unixware*)
      ;;
    vxworks*)
      ;;
    *)
      ac_cv_prog_cc_can_build_shared=no
      ;;
  esac
fi
ac_cv_prog_cc_pic="$ac_cv_prog_cc_pic -DPIC"


# Figure out "hidden" C++ library dependencies from verbose
# compiler output whening linking a shared library.
cat > conftest.$ac_ext <<EOF
class Foo
{
public:
  Foo (void) { a = 0; }
private:
  int a;
};
EOF


if eval $ac_compile 2>&5; then
  # Parse the compiler output and extract the necessary
  # objects, libraries and library flags.

  # Sentinel used to keep track of whether or not we are before
  # the conftest object file.
  pre_test_object_deps_done=no

  for p in `eval $output_verbose_link_cmds`; do

    case $p in

    -L* | -R* | -l*)
       # Some compilers place space between "-{L,R}" and the path.
       # Remove the space.
       if test $p = "-L" \
          || test $p = "-R"; then
         prev=$p
         continue
       else
         prev=
       fi

       if test "$pre_test_object_deps_done" = no; then
         case $p in
	 -L* | -R*)
	   # Internal compiler library paths should come after those
	   # provided the user.  The postdeps already come after the
	   # user supplied libs so there is no need to process them.
           if test -z "$compiler_lib_search_path"; then
             compiler_lib_search_path="${prev}${p}"
           else
             compiler_lib_search_path="${compiler_lib_search_path} ${prev}${p}"
           fi
           ;;
         # The "-l" case would never come before the object being
         # linked, so don't bother handling this case.
         esac
       else
         if test -z "$postdeps"; then
           postdeps="${prev}${p}"
         else
           postdeps="${postdeps} ${prev}${p}"
         fi
       fi
       ;;

    *.$objext)
       # This assumes that the test object file only shows up
       # once in the compiler output.
       if test "$p" = "conftest.$objext"; then
         pre_test_object_deps_done=yes
         continue
       fi

       if test "$pre_test_object_deps_done" = no; then
         if test -z "$predep_objects"; then
           predep_objects="$p"
         else
           predep_objects="$predep_objects $p"
         fi
       else
         if test -z "$postdep_objects"; then
           postdep_objects="$p"
         else
           postdep_objects="$postdep_objects $p"
         fi
       fi
       ;;

    *) ;; # Ignore the rest.

    esac
  done

  # Clean up.
  rm -f a.out
else
  echo "ltcf-cxx.sh: error: problem compiling test program"
fi

$rm -f confest.$objext

case " $postdeps " in
*" -lc "*) need_lc=no ;;
*) need_lc=yes ;;
esac