ltcf-c.sh

   1 #### This script is meant to be sourced by ltconfig.
   2
   3 # ltcf-c.sh - Create a C compiler specific configuration
   4 #
   5 # Copyright (C) 1996-2000, 2001 Free Software Foundation, Inc.
   6 # Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
   7 #
   8 # This file is free software; you can redistribute it and/or modify it
   9 # under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful, but
  14 # WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 # General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, write to the Free Software
  20 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21 #
  22 # As a special exception to the GNU General Public License, if you
  23 # distribute this file as part of a program that contains a
  24 # configuration script generated by Autoconf, you may include it under
  25 # the same distribution terms that you use for the rest of that program.
  26
  27
  28 # Source file extension for C test sources.
  29 ac_ext=c
  30
  31 # Object file extension for compiled C test sources.
  32 objext=o
  33
  34 # Code to be used in simple compile tests
  35 lt_simple_compile_test_code="int some_variable = 0;"
  36
  37 # Code to be used in simple link tests
  38 lt_simple_link_test_code='main(){return(0);}'
  39
  40 ## Linker Characteristics
  41 case "$host_os" in
  42 cygwin* | mingw*)
  43   # FIXME: the MSVC++ port hasn't been tested in a loooong time
  44   # When not using gcc, we currently assume that we are using
  45   # Microsoft Visual C++.
  46   if test "$with_gcc" != yes; then
  47     with_gnu_ld=no
  48   fi
  49   ;;
  50
  51 esac
  52
  53 ld_shlibs=yes
  54 if test "$with_gnu_ld" = yes; then
  55   # If archive_cmds runs LD, not CC, wlarc should be empty
  56   wlarc='${wl}'
  57
  58   # See if GNU ld supports shared libraries.
  59   case "$host_os" in
  60   aix3* | aix4*)
  61     # On AIX, the GNU linker is very broken
  62     ld_shlibs=no
  63     cat <<EOF 1>&2
  64
  65 *** Warning: the GNU linker, at least up to release 2.9.1, is reported
  66 *** to be unable to reliably create shared libraries on AIX.
  67 *** Therefore, libtool is disabling shared libraries support.  If you
  68 *** really care for shared libraries, you may want to modify your PATH
  69 *** so that a non-GNU linker is found, and then restart.
  70
  71 EOF
  72     ;;
  73
  74   amigaos*)
  75     archive_cmds='$rm $output_objdir/a2ixlibrary.data~$echo "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$echo "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$echo "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$echo "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
  76     hardcode_libdir_flag_spec='-L$libdir'
  77     hardcode_minus_L=yes
  78
  79     # Samuel A. Falvo II <kc5tja@dolphin.openprojects.net> reports
  80     # that the semantics of dynamic libraries on AmigaOS, at least up
  81     # to version 4, is to share data among multiple programs linked
  82     # with the same dynamic library.  Since this doesn't match the
  83     # behavior of shared libraries on other platforms, we can use
  84     # them.
  85     ld_shlibs=no
  86     ;;
  87
  88   beos*)
  89     if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
  90       allow_undefined_flag=unsupported
  91       # Joseph Beckenbach <jrb3@best.com> says some releases of gcc
  92       # support --undefined.  This deserves some investigation.  FIXME
  93       archive_cmds='$CC -nostart $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
  94     else
  95       ld_shlibs=no
  96     fi
  97     ;;
  98
  99   cygwin* | mingw*)
 100     # hardcode_libdir_flag_spec is actually meaningless, as there is
 101     # no search path for DLLs.
 102     hardcode_libdir_flag_spec='-L$libdir'
 103     allow_undefined_flag=unsupported
 104     always_export_symbols=yes
 105
 106     extract_expsyms_cmds='test -f $output_objdir/impgen.c || \
 107       sed -e "/^# \/\* impgen\.c starts here \*\//,/^# \/\* impgen.c ends here \*\// { s/^# //; p; }" -e d < $0 > $output_objdir/impgen.c~
 108       test -f $output_objdir/impgen.exe || (cd $output_objdir && \
 109       if test "x$HOST_CC" != "x" ; then $HOST_CC -o impgen impgen.c ; \
 110       else $CC -o impgen impgen.c ; fi)~
 111       $output_objdir/impgen $dir/$soname > $output_objdir/$soname-def'
 112
 113     old_archive_from_expsyms_cmds='$DLLTOOL --as=$AS --dllname $soname --def $output_objdir/$soname-def --output-lib $output_objdir/$newlib'
 114
 115     # cygwin and mingw dlls have different entry points and sets of symbols
 116     # to exclude.
 117     # FIXME: what about values for MSVC?
 118     dll_entry=__cygwin_dll_entry@12
 119     dll_exclude_symbols=DllMain@12,_cygwin_dll_entry@12,_cygwin_noncygwin_dll_entry@12~
 120     case "$host_os" in
 121     mingw*)
 122       # mingw values
 123       dll_entry=_DllMainCRTStartup@12
 124       dll_exclude_symbols=DllMain@12,DllMainCRTStartup@12,DllEntryPoint@12~
 125       ;;
 126     esac
 127
 128     # mingw and cygwin differ, and it's simplest to just exclude the union
 129     # of the two symbol sets.
 130     dll_exclude_symbols=DllMain@12,_cygwin_dll_entry@12,_cygwin_noncygwin_dll_entry@12,DllMainCRTStartup@12,DllEntryPoint@12
 131
 132     # recent cygwin and mingw systems supply a stub DllMain which the user
 133     # can override, but on older systems we have to supply one (in ltdll.c)
 134     if test "x$lt_cv_need_dllmain" = "xyes"; then
 135       ltdll_obj='$output_objdir/$soname-ltdll.'"$objext "
 136       ltdll_cmds='test -f $output_objdir/$soname-ltdll.c || sed -e "/^# \/\* ltdll\.c starts here \*\//,/^# \/\* ltdll.c ends here \*\// { s/^# //; p; }" -e d < $0 > $output_objdir/$soname-ltdll.c~
 137         test -f $output_objdir/$soname-ltdll.$objext || (cd $output_objdir && $CC -c $soname-ltdll.c)~'
 138     else
 139       ltdll_obj=
 140       ltdll_cmds=
 141     fi
 142
 143     # Extract the symbol export list from an `--export-all' def file,
 144     # then regenerate the def file from the symbol export list, so that
 145     # the compiled dll only exports the symbol export list.
 146     # Be careful not to strip the DATA tag left be newer dlltools.
 147     export_symbols_cmds="$ltdll_cmds"'
 148       $DLLTOOL --export-all --exclude-symbols '$dll_exclude_symbols' --output-def $output_objdir/$soname-def '$ltdll_obj'$libobjs $convenience~
 149       sed -e "1,/EXPORTS/d" -e "s/ @ [0-9]*//" -e "s/ *;.*$//" < $output_objdir/$soname-def > $export_symbols'
 150
 151     # If DATA tags from a recent dlltool are present, honour them!
 152     archive_expsym_cmds='echo EXPORTS > $output_objdir/$soname-def~
 153       _lt_hint=1;
 154       cat $export_symbols | while read symbol; do
 155         set dummy \$symbol;
 156         case \$# in
 157           2) echo "     \$2 @ \$_lt_hint ; " >> $output_objdir/$soname-def;;
 158           *) echo "     \$2 @ \$_lt_hint \$3 ; " >> $output_objdir/$soname-def;;
 159         esac;
 160         _lt_hint=`expr 1 + \$_lt_hint`;
 161       done~
 162       '"$ltdll_cmds"'
 163       $CC -Wl,--base-file,$output_objdir/$soname-base '$lt_cv_cc_dll_switch' -Wl,-e,'$dll_entry' -o $lib '$ltdll_obj'$libobjs $deplibs $compiler_flags~
 164       $DLLTOOL --as=$AS --dllname $soname --exclude-symbols '$dll_exclude_symbols' --def $output_objdir/$soname-def --base-file $output_objdir/$soname-base --output-exp $output_objdir/$soname-exp~
 165       $CC -Wl,--base-file,$output_objdir/$soname-base $output_objdir/$soname-exp '$lt_cv_cc_dll_switch' -Wl,-e,'$dll_entry' -o $lib '$ltdll_obj'$libobjs $deplibs $compiler_flags~
 166       $DLLTOOL --as=$AS --dllname $soname --exclude-symbols '$dll_exclude_symbols' --def $output_objdir/$soname-def --base-file $output_objdir/$soname-base --output-exp $output_objdir/$soname-exp~
 167       $CC $output_objdir/$soname-exp '$lt_cv_cc_dll_switch' -Wl,-e,'$dll_entry' -o $lib '$ltdll_obj'$libobjs $deplibs $compiler_flags'
 168     ;;
 169
 170   netbsd*)
 171     if echo __ELF__ | $CC -E - | grep __ELF__ >/dev/null; then
 172       archive_cmds='$LD -Bshareable $libobjs $deplibs $linker_flags -o $lib'
 173       wlarc=
 174     else
 175       archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
 176       archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
 177     fi
 178     ;;
 179
 180   solaris* | sysv5*)
 181     if $LD -v 2>&1 | egrep 'BFD 2\.8' > /dev/null; then
 182       ld_shlibs=no
 183       cat <<EOF 1>&2
 184
 185 *** Warning: The releases 2.8.* of the GNU linker cannot reliably
 186 *** create shared libraries on Solaris systems.  Therefore, libtool
 187 *** is disabling shared libraries support.  We urge you to upgrade GNU
 188 *** binutils to release 2.9.1 or newer.  Another option is to modify
 189 *** your PATH or compiler configuration so that the native linker is
 190 *** used, and then restart.
 191
 192 EOF
 193     elif $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
 194       archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
 195       archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
 196     else
 197       ld_shlibs=no
 198     fi
 199     ;;
 200
 201   sunos4*)
 202     archive_cmds='$LD -assert pure-text -Bshareable -o $lib $libobjs $deplibs $linker_flags'
 203     wlarc=
 204     hardcode_direct=yes
 205     hardcode_shlibpath_var=no
 206     ;;
 207
 208   *)
 209     if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
 210       archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
 211       archive_expsym_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib'
 212     else
 213       ld_shlibs=no
 214     fi
 215     ;;
 216   esac
 217
 218   if test "$ld_shlibs" = yes; then
 219     runpath_var=LD_RUN_PATH
 220     hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
 221     export_dynamic_flag_spec='${wl}--export-dynamic'
 222     case $host_os in
 223     cygwin* | mingw*)
 224       # dlltool doesn't understand --whole-archive et. al.
 225       whole_archive_flag_spec=
 226       ;;
 227     *)
 228       # ancient GNU ld didn't support --whole-archive et. al.
 229       if $LD --help 2>&1 | egrep 'no-whole-archive' > /dev/null; then
 230         whole_archive_flag_spec="$wlarc"'--whole-archive$convenience '"$wlarc"'--no-whole-archive'
 231       else
 232         whole_archive_flag_spec=
 233       fi
 234       ;;
 235     esac
 236   fi
 237 else
 238   # PORTME fill in a description of your system's linker (not GNU ld)
 239   case "$host_os" in
 240   aix3*)
 241     allow_undefined_flag=unsupported
 242     always_export_symbols=yes
 243     archive_expsym_cmds='$LD -o $output_objdir/$soname $libobjs $deplibs $linker_flags -bE:$export_symbols -T512 -H512 -bM:SRE~$AR $AR_FLAGS $lib $output_objdir/$soname'
 244     # Note: this linker hardcodes the directories in LIBPATH if there
 245     # are no directories specified by -L.
 246     hardcode_minus_L=yes
 247     if test "$with_gcc" = yes && test -z "$link_static_flag"; then
 248       # Neither direct hardcoding nor static linking is supported with a
 249       # broken collect2.
 250       hardcode_direct=unsupported
 251     fi
 252     ;;
 253
 254   aix4*)
 255     hardcode_libdir_flag_spec='${wl}-b ${wl}nolibpath ${wl}-b ${wl}libpath:$libdir:/usr/lib:/lib'
 256     hardcode_libdir_separator=':'
 257     if test "$with_gcc" = yes; then
 258       collect2name=`${CC} -print-prog-name=collect2`
 259       if test -f "$collect2name" && \
 260          strings "$collect2name" | grep resolve_lib_name >/dev/null
 261       then
 262         # We have reworked collect2
 263         hardcode_direct=yes
 264       else
 265         # We have old collect2
 266         hardcode_direct=unsupported
 267         # It fails to find uninstalled libraries when the uninstalled
 268         # path is not listed in the libpath.  Setting hardcode_minus_L
 269         # to unsupported forces relinking
 270         hardcode_minus_L=yes
 271         hardcode_libdir_flag_spec='-L$libdir'
 272         hardcode_libdir_separator=
 273       fi
 274       shared_flag='-shared'
 275     else
 276       shared_flag='${wl}-bM:SRE'
 277       hardcode_direct=yes
 278     fi
 279     allow_undefined_flag=' ${wl}-berok'
 280     archive_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${wl}-bexpall ${wl}-bnoentry${allow_undefined_flag}'
 281     archive_expsym_cmds="\$CC $shared_flag"' -o $output_objdir/$soname $libobjs $deplibs $compiler_flags ${wl}-bE:$export_symbols ${wl}-bnoentry${allow_undefined_flag}'
 282     case "$host_os" in aix4.[01]|aix4.[01].*)
 283       # According to Greg Wooledge, -bexpall is only supported from AIX 4.2 on
 284       always_export_symbols=yes ;;
 285     esac
 286
 287     # We don't want to build shared libraries on unknown CPU types.
 288     case $host_cpu in
 289     powerpc | rs6000) ;;
 290     *) ld_shlibs=no ;;
 291     esac
 292    ;;
 293
 294   amigaos*)
 295     archive_cmds='$rm $output_objdir/a2ixlibrary.data~$echo "#define NAME $libname" > $output_objdir/a2ixlibrary.data~$echo "#define LIBRARY_ID 1" >> $output_objdir/a2ixlibrary.data~$echo "#define VERSION $major" >> $output_objdir/a2ixlibrary.data~$echo "#define REVISION $revision" >> $output_objdir/a2ixlibrary.data~$AR $AR_FLAGS $lib $libobjs~$RANLIB $lib~(cd $output_objdir && a2ixlibrary -32)'
 296     hardcode_libdir_flag_spec='-L$libdir'
 297     hardcode_minus_L=yes
 298     # see comment about different semantics on the GNU ld section
 299     ld_shlibs=no
 300     ;;
 301
 302   cygwin* | mingw*)
 303     # When not using gcc, we currently assume that we are using
 304     # Microsoft Visual C++.
 305     # hardcode_libdir_flag_spec is actually meaningless, as there is
 306     # no search path for DLLs.
 307     hardcode_libdir_flag_spec=' '
 308     allow_undefined_flag=unsupported
 309     # Tell ltmain to make .lib files, not .a files.
 310     libext=lib
 311     # FIXME: Setting linknames here is a bad hack.
 312     archive_cmds='$CC -o $lib $libobjs $compiler_flags `echo "$deplibs" | sed -e '\''s/ -lc$//'\''` -link -dll~linknames='
 313     # The linker will automatically build a .lib file if we build a DLL.
 314     old_archive_from_new_cmds='true'
 315     # FIXME: Should let the user specify the lib program.
 316     old_archive_cmds='lib /OUT:$oldlib$oldobjs$old_deplibs'
 317     fix_srcfile_path='`cygpath -w $srcfile`'
 318     ;;
 319
 320   freebsd1*)
 321     ld_shlibs=no
 322     ;;
 323
 324   # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
 325   # support.  Future versions do this automatically, but an explicit c++rt0.o
 326   # does not break anything, and helps significantly (at the cost of a little
 327   # extra space).
 328   freebsd2.2*)
 329     archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags /usr/lib/c++rt0.o'
 330     hardcode_libdir_flag_spec='-R$libdir'
 331     hardcode_direct=yes
 332     hardcode_shlibpath_var=no
 333     ;;
 334
 335   # Unfortunately, older versions of FreeBSD 2 do not have this feature.
 336   freebsd2*)
 337     archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
 338     hardcode_direct=yes
 339     hardcode_minus_L=yes
 340     hardcode_shlibpath_var=no
 341     ;;
 342
 343   # FreeBSD 3 and greater uses gcc -shared to do shared libraries.
 344   freebsd*)
 345     archive_cmds='$CC -shared -o $lib $libobjs $deplibs $compiler_flags'
 346     hardcode_libdir_flag_spec='-R$libdir'
 347     hardcode_direct=yes
 348     hardcode_shlibpath_var=no
 349     ;;
 350
 351   hpux9* | hpux10* | hpux11*)
 352     case "$host_os" in
 353     hpux9*) archive_cmds='$rm $output_objdir/$soname~$LD -b +b $install_libdir -o $output_objdir/$soname $libobjs $deplibs $linker_flags~test $output_objdir/$soname = $lib || mv $output_objdir/$soname $lib' ;;
 354     *) archive_cmds='$LD -b +h $soname +b $install_libdir -o $lib $libobjs $deplibs $linker_flags' ;;
 355     esac
 356     hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
 357     hardcode_libdir_separator=:
 358     hardcode_direct=yes
 359     hardcode_minus_L=yes # Not in the search PATH, but as the default
 360                          # location of the library.
 361     export_dynamic_flag_spec='${wl}-E'
 362     ;;
 363
 364   irix5* | irix6*)
 365     if test "$with_gcc" = yes; then
 366       archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${objdir}/so_locations -o $lib'
 367     else
 368       archive_cmds='$LD -shared $libobjs $deplibs $linker_flags -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
 369     fi
 370     hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 371     hardcode_libdir_separator=:
 372     link_all_deplibs=yes
 373     ;;
 374
 375   netbsd*)
 376     if echo __ELF__ | $CC -E - | grep __ELF__ >/dev/null; then
 377       archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'  # a.out
 378     else
 379       archive_cmds='$LD -shared -o $lib $libobjs $deplibs $linker_flags'      # ELF
 380     fi
 381     hardcode_libdir_flag_spec='${wl}-R$libdir'
 382     hardcode_direct=yes
 383     hardcode_shlibpath_var=no
 384     ;;
 385
 386   openbsd*)
 387     archive_cmds='$LD -Bshareable -o $lib $libobjs $deplibs $linker_flags'
 388     hardcode_libdir_flag_spec='-R$libdir'
 389     hardcode_direct=yes
 390     hardcode_shlibpath_var=no
 391     ;;
 392
 393   os2*)
 394     hardcode_libdir_flag_spec='-L$libdir'
 395     hardcode_minus_L=yes
 396     allow_undefined_flag=unsupported
 397     archive_cmds='$echo "LIBRARY $libname INITINSTANCE" > $output_objdir/$libname.def~$echo "DESCRIPTION \"$libname\"" >> $output_objdir/$libname.def~$echo DATA >> $output_objdir/$libname.def~$echo " SINGLE NONSHARED" >> $output_objdir/$libname.def~$echo EXPORTS >> $output_objdir/$libname.def~emxexp $libobjs >> $output_objdir/$libname.def~$CC -Zdll -Zcrtdll -o $lib $libobjs $deplibs $compiler_flags $output_objdir/$libname.def'
 398     old_archive_from_new_cmds='emximp -o $output_objdir/$libname.a $output_objdir/$libname.def'
 399     ;;
 400
 401   osf3*)
 402     if test "$with_gcc" = yes; then
 403       allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 404       archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $compiler_flags ${wl}-soname ${wl}$soname `test -n "$verstring" && echo ${wl}-set_version ${wl}$verstring` ${wl}-update_registry ${wl}${objdir}/so_locations -o $lib'
 405     else
 406       allow_undefined_flag=' -expect_unresolved \*'
 407       archive_cmds='$LD -shared${allow_undefined_flag} $libobjs $deplibs $linker_flags -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
 408     fi
 409     hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 410     hardcode_libdir_separator=:
 411     ;;
 412
 413   osf4* | osf5*)        # as osf3* with the addition of -msym flag
 414     if test "$with_gcc" = yes; then
 415       allow_undefined_flag=' ${wl}-expect_unresolved ${wl}\*'
 416       archive_cmds='$CC -shared${allow_undefined_flag} $libobjs $deplibs $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 $lib'
 417     else
 418       allow_undefined_flag=' -expect_unresolved \*'
 419       archive_cmds='$LD -shared${allow_undefined_flag} $libobjs $deplibs $linker_flags -msym -soname $soname `test -n "$verstring" && echo -set_version $verstring` -update_registry ${objdir}/so_locations -o $lib'
 420     fi
 421     hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
 422     hardcode_libdir_separator=:
 423     ;;
 424
 425   sco3.2v5*)
 426     archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
 427     hardcode_shlibpath_var=no
 428     runpath_var=LD_RUN_PATH
 429     hardcode_runpath_var=yes
 430     ;;
 431
 432   solaris*)
 433     no_undefined_flag=' -z text'
 434     # $CC -shared without GNU ld will not create a library from C++
 435     # object files and a static libstdc++, better avoid it by now
 436     archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags'
 437     archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 438                 $LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$rm $lib.exp'
 439     hardcode_libdir_flag_spec='-R$libdir'
 440     hardcode_shlibpath_var=no
 441     case "$host_os" in
 442     solaris2.[0-5] | solaris2.[0-5].*) ;;
 443     *) # Supported since Solaris 2.6 (maybe 2.5.1?)
 444       whole_archive_flag_spec='-z allextract$convenience -z defaultextract' ;;
 445     esac
 446     link_all_deplibs=yes
 447     ;;
 448
 449   sunos4*)
 450     archive_cmds='$LD -assert pure-text -Bstatic -o $lib $libobjs $deplibs $linker_flags'
 451     hardcode_libdir_flag_spec='-L$libdir'
 452     hardcode_direct=yes
 453     hardcode_minus_L=yes
 454     hardcode_shlibpath_var=no
 455     ;;
 456
 457   sysv4)
 458     archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
 459     runpath_var='LD_RUN_PATH'
 460     hardcode_shlibpath_var=no
 461     hardcode_direct=no #Motorola manual says yes, but my tests say they lie
 462     ;;
 463
 464   sysv4.3*)
 465     archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
 466     hardcode_shlibpath_var=no
 467     export_dynamic_flag_spec='-Bexport'
 468     ;;
 469
 470   sysv5*)
 471     no_undefined_flag=' -z text'
 472     # $CC -shared without GNU ld will not create a library from C++
 473     # object files and a static libstdc++, better avoid it by now
 474     archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib $libobjs $deplibs $linker_flags'
 475     archive_expsym_cmds='$echo "{ global:" > $lib.exp~cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $lib.exp~$echo "local: *; };" >> $lib.exp~
 476                 $LD -G${allow_undefined_flag} -M $lib.exp -h $soname -o $lib $libobjs $deplibs $linker_flags~$rm $lib.exp'
 477     hardcode_libdir_flag_spec=
 478     hardcode_shlibpath_var=no
 479     runpath_var='LD_RUN_PATH'
 480     ;;
 481
 482   uts4*)
 483     archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
 484     hardcode_libdir_flag_spec='-L$libdir'
 485     hardcode_shlibpath_var=no
 486     ;;
 487
 488   dgux*)
 489     archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
 490     hardcode_libdir_flag_spec='-L$libdir'
 491     hardcode_shlibpath_var=no
 492     ;;
 493
 494   sysv4*MP*)
 495     if test -d /usr/nec; then
 496       archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
 497       hardcode_shlibpath_var=no
 498       runpath_var=LD_RUN_PATH
 499       hardcode_runpath_var=yes
 500       ld_shlibs=yes
 501     fi
 502     ;;
 503
 504   sysv4.2uw2*)
 505     archive_cmds='$LD -G -o $lib $libobjs $deplibs $linker_flags'
 506     hardcode_direct=yes
 507     hardcode_minus_L=no
 508     hardcode_shlibpath_var=no
 509     hardcode_runpath_var=yes
 510     runpath_var=LD_RUN_PATH
 511     ;;
 512
 513   unixware7*)
 514     archive_cmds='$LD -G -h $soname -o $lib $libobjs $deplibs $linker_flags'
 515     runpath_var='LD_RUN_PATH'
 516     hardcode_shlibpath_var=no
 517     ;;
 518
 519   *)
 520     ld_shlibs=no
 521     ;;
 522   esac
 523 fi
 524
 525 ## Compiler Characteristics: PIC flags, static flags, etc
 526 if test "X${ac_cv_prog_cc_pic+set}" = Xset; then
 527   :
 528 else
 529   ac_cv_prog_cc_pic=
 530   ac_cv_prog_cc_shlib=
 531   ac_cv_prog_cc_wl=
 532   ac_cv_prog_cc_static=
 533   ac_cv_prog_cc_no_builtin=
 534   ac_cv_prog_cc_can_build_shared=$can_build_shared
 535
 536   if test "$with_gcc" = yes; then
 537     ac_cv_prog_cc_wl='-Wl,'
 538     ac_cv_prog_cc_static='-static'
 539
 540     case "$host_os" in
 541     beos* | irix5* | irix6* | osf3* | osf4* | osf5*)
 542       # PIC is the default for these OSes.
 543       ;;
 544     aix*)
 545       # Below there is a dirty hack to force normal static linking with -ldl
 546       # The problem is because libdl dynamically linked with both libc and
 547       # libC (AIX C++ library), which obviously doesn't included in libraries
 548       # list by gcc. This cause undefined symbols with -static flags.
 549       # This hack allows C programs to be linked with "-static -ldl", but
 550       # we not sure about C++ programs.
 551       ac_cv_prog_cc_static="$ac_cv_prog_cc_static ${ac_cv_prog_cc_wl}-lC"
 552       ;;
 553     cygwin* | mingw* | os2*)
 554       # This hack is so that the source file can tell whether it is being
 555       # built for inclusion in a dll (and should export symbols for example).
 556       ac_cv_prog_cc_pic='-DDLL_EXPORT'
 557       ;;
 558     amigaos*)
 559       # FIXME: we need at least 68020 code to build shared libraries, but
 560       # adding the `-m68020' flag to GCC prevents building anything better,
 561       # like `-m68040'.
 562       ac_cv_prog_cc_pic='-m68020 -resident32 -malways-restore-a4'
 563       ;;
 564     sysv4*MP*)
 565       if test -d /usr/nec; then
 566          ac_cv_prog_cc_pic=-Kconform_pic
 567       fi
 568       ;;
 569     *)
 570       ac_cv_prog_cc_pic='-fPIC'
 571       ;;
 572     esac
 573   else
 574     # PORTME Check for PIC flags for the system compiler.
 575     case "$host_os" in
 576     aix3* | aix4*)
 577      # All AIX code is PIC.
 578       ac_cv_prog_cc_static='-bnso -bI:/lib/syscalls.exp'
 579       ;;
 580
 581     hpux9* | hpux10* | hpux11*)
 582       # Is there a better ac_cv_prog_cc_static that works with the bundled CC?
 583       ac_cv_prog_cc_wl='-Wl,'
 584       ac_cv_prog_cc_static="${ac_cv_prog_cc_wl}-a ${ac_cv_prog_cc_wl}archive"
 585       ac_cv_prog_cc_pic='+Z'
 586       ;;
 587
 588     irix5* | irix6*)
 589       ac_cv_prog_cc_wl='-Wl,'
 590       ac_cv_prog_cc_static='-non_shared'
 591       # PIC (with -KPIC) is the default.
 592       ;;
 593
 594     cygwin* | mingw* | os2*)
 595       # This hack is so that the source file can tell whether it is being
 596       # built for inclusion in a dll (and should export symbols for example).
 597       ac_cv_prog_cc_pic='-DDLL_EXPORT'
 598       ;;
 599
 600     osf3* | osf4* | osf5*)
 601       # All OSF/1 code is PIC.
 602       ac_cv_prog_cc_wl='-Wl,'
 603       ac_cv_prog_cc_static='-non_shared'
 604       ;;
 605
 606     sco3.2v5*)
 607       ac_cv_prog_cc_pic='-Kpic'
 608       ac_cv_prog_cc_static='-dn'
 609       ac_cv_prog_cc_shlib='-belf'
 610       ;;
 611
 612     solaris*)
 613       ac_cv_prog_cc_pic='-KPIC'
 614       ac_cv_prog_cc_static='-Bstatic'
 615       ac_cv_prog_cc_wl='-Wl,'
 616       ;;
 617
 618     sunos4*)
 619       ac_cv_prog_cc_pic='-PIC'
 620       ac_cv_prog_cc_static='-Bstatic'
 621       ac_cv_prog_cc_wl='-Qoption ld '
 622       ;;
 623
 624     sysv4 | sysv4.2uw2* | sysv4.3* | sysv5*)
 625       ac_cv_prog_cc_pic='-KPIC'
 626       ac_cv_prog_cc_static='-Bstatic'
 627       ac_cv_prog_cc_wl='-Wl,'
 628       ;;
 629
 630     uts4*)
 631       ac_cv_prog_cc_pic='-pic'
 632       ac_cv_prog_cc_static='-Bstatic'
 633       ;;
 634
 635     sysv4*MP*)
 636       if test -d /usr/nec ;then
 637         ac_cv_prog_cc_pic='-Kconform_pic'
 638         ac_cv_prog_cc_static='-Bstatic'
 639       fi
 640       ;;
 641
 642     *)
 643       ac_cv_prog_cc_can_build_shared=no
 644       ;;
 645     esac
 646   fi
 647   ac_cv_prog_cc_pic="$ac_cv_prog_cc_pic -DPIC"
 648 fi
 649
 650 need_lc=yes
 651 if test "$enable_shared" = yes && test "$with_gcc" = yes; then
 652   case "$archive_cmds" in
 653   *'~'*)
 654     # FIXME: we may have to deal with multi-command sequences.
 655     ;;
 656   '$CC '*)
 657     # Test whether the compiler implicitly links with -lc since on some
 658     # systems, -lgcc has to come before -lc. If gcc already passes -lc
 659     # to ld, don't add -lc before -lgcc.
 660     echo $ac_n "checking whether -lc should be explicitly linked in... $ac_c" 1>&6
 661     if eval "test \"`echo '$''{'ac_cv_archive_cmds_needs_lc'+set}'`\" = set"; then
 662       echo $ac_n "(cached) $ac_c" 1>&6
 663       need_lc=$ac_cv_archive_cmds_needs_lc
 664     else
 665       $rm conftest*
 666       echo "static int dummy;" > conftest.$ac_ext
 667       if { (eval echo ltcf-c.sh:need_lc: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>conftest.err; }; then
 668         # Append any warnings to the config.log.
 669         cat conftest.err 1>&5
 670         soname=conftest
 671         lib=conftest
 672         libobjs=conftest.o
 673         deplibs=
 674         wl=$ac_cv_prog_cc_wl
 675         compiler_flags=-v
 676         linker_flags=-v
 677         verstring=
 678         output_objdir=.
 679         libname=conftest
 680         save_allow_undefined_flag=$allow_undefined_flag
 681         allow_undefined_flag=
 682         if { (eval echo ltcf-c.sh:need_lc: \"$archive_cmds\") 1>&5; (eval $archive_cmds) 2>&1 | grep " -lc " 1>&5 ; }; then
 683           need_lc=no
 684         fi
 685         allow_undefined_flag=$save_allow_undefined_flag
 686       else
 687         cat conftest.err 1>&5
 688       fi
 689     fi
 690     $rm conftest*
 691     echo "$ac_t$need_lc" 1>&6
 692     ;;
 693   esac
 694 fi
 695 ac_cv_archive_cmds_needs_lc=$need_lc