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Thomas Tanner 1998-12-01 22:35:00 +00:00
parent 37c8df2bb4
commit 3ce33a45f6
7 changed files with 58 additions and 43 deletions
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2
ChangeLog
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@ -84,7 +84,7 @@
1998-11-24 Thomas Tanner <tanner@gmx.de>
* depdemo: added inter-library dependencies demo (doesn't work yet!)
* AUTHORS: added me to the list of maintainers
* AUTHORS: added myself to the list of maintainers
1998-11-22 Thomas Tanner <tanner@gmx.de>

14
doc/libtool.texi
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@ -1144,9 +1144,10 @@ Allow symbols from @var{output-file} to be resolved with @code{dlsym}
(@pxref{Dlopened modules}).
@item -export-symbols @var{symfile}
Same as @samp{-export-dynamic}, except that it only exports symbols
that are listed in @var{symfile}. The symbol file should end in @samp{.sym}
and must contain the name of one symbol per line.
Tells the linker to export only the symbols listed in @var{symfile}.
The symbol file should end in @samp{.sym} and must contain the name of one
symbol per line. This option does not work for modules.
By default all symbols are exported.
@item -L@var{libdir}
Search @var{libdir} for required libraries that have already been
@ -2266,7 +2267,7 @@ On some operating systems, a program symbol must be specially declared
in order to be dynamically resolved with the @code{dlsym} (or
equivalent) function.
Libtool provides the @samp{-export-dynamic} and @samp{-export-symbols} link
Libtool provides the @samp{-export-dynamic} link
flags (@pxref{Link mode}), which does this declaration.
You need to use this flag if you are linking an application program that
dlopens other modules or a libtool library that will also be dlopened.
@ -2328,7 +2329,7 @@ module, or the module is not found, then the application can recover
without crashing.
@end enumerate
Libtool emulates @samp{-export-dynamic} and @samp{-export-symbols}
Libtool emulates @samp{-export-dynamic}
on static platforms by linking objects into the program at compile time,
and creating data structures that represent the program's symbol table.
@ -2361,8 +2362,7 @@ in @var{dld_preloaded_symbols}.
@cindex names of dynamic modules
@cindex dynamic modules, names
After a library has been linked with @samp{-export-dynamic} or
@samp{-export-symbols}, it can be dlopened.
After a library has been linked with @samp{-export-dynamic}, it can be dlopened.
Unfortunately, because of the variation in library names,
your package needs to determine the correct file to dlopen.

38
ltconfig.in
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@ -970,6 +970,7 @@ echo $ac_n "checking whether the linker ($LD) supports shared libraries... $ac_c
allow_undefined_flag=
no_undefined_flag=
archive_cmds=
archive_sym_cmds=
old_archive_from_new_cmds=
export_dynamic_flag_spec=
whole_archive_flag_spec=
@ -1032,8 +1033,15 @@ DllMain (HINSTANCE hInst, DWORD reason, LPVOID reserved)
}
' > ltdll.c
archive_cmds='$CC -c '"`pwd`"'/ltdll.c~echo EXPORTS > $lib.exp~
if test -z "$export_symbols"; then $DLLTOOL --export-all --output-def $lib.exp;
else cat "$export_symbols" > $lib.exp; fi~
$DLLTOOL --export-all --output-def $lib.exp~
$CC -Wl,--base-file,$soname-base -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 $libobs ltdll.$objext~
$DLLTOOL --as=$AS --dllname $soname --exclude-symbol=_cygwin_dll_entry@12 --def $lib.exp --base-file $soname-base --output-exp $soname-exp~
$CC -Wl,--base-file,$soname-base $soname-exp -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 -o $lib $libobjs ltdll.$objext$deplibs~
$DLLTOOL --as=$AS --dllname $soname --exclude-symbol=_cygwin_dll_entry@12 --def $lib.exp --base-file $soname-base --output-exp $soname-exp~
$CC $soname-exp -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 -o $lib $libobjs ltdll.$objext$deplibs~
$rm ltdll.$objext $soname-base $soname-exp'
archive_sym_cmds='$CC -c '"`pwd`"'/ltdll.c~echo EXPORTS > $lib.exp~
cat "$export_symbols" > $lib.exp~
$CC -Wl,--base-file,$soname-base -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 $libobs ltdll.$objext~
$DLLTOOL --as=$AS --dllname $soname --exclude-symbol=_cygwin_dll_entry@12 --def $lib.exp --base-file $soname-base --output-exp $soname-exp~
$CC -Wl,--base-file,$soname-base $soname-exp -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 -o $lib $libobjs ltdll.$objext$deplibs~
@ -1064,6 +1072,7 @@ DllMain (HINSTANCE hInst, DWORD reason, LPVOID reserved)
*)
if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
archive_cmds='$CC -shared ${wl}-soname $wl$soname -o $lib$libobjs$deplibs'
archive_sym_cmds='$CC -shared ${wl}-soname $wl$soname ${wl}-retain-symbols-file $wl$export_symbols -o $lib$libobjs$deplibs'
else
ld_shlibs=no
fi
@ -1081,8 +1090,10 @@ else
case "$host_os" in
aix3*)
allow_undefined_flag=unsupported
archive_cmds='if test -z "$export_symbols"; then $NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\' | sort | uniq' > $lib.exp;
else cat "$export_symbols" > $lib.exp; fi~$LD -o $objdir/$soname$libobjs$deplibs -bE:$lib.exp -T512 -H512 -bM:SRE~$AR cru $lib $objdir/$soname'
archive_cmds='$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\' | sort | uniq' > $lib.exp~
$LD -o $objdir/$soname$libobjs$deplibs -bE:$lib.exp -T512 -H512 -bM:SRE~$AR cru $lib $objdir/$soname'
archive_sym_cmds='cat $export_symbols > $lib.exp~
$LD -o $objdir/$soname$libobjs$deplibs -bE:$lib.exp -T512 -H512 -bM:SRE~$AR cru $lib $objdir/$soname~$rm $lib.exp'
# Note: this linker hardcodes the directories in LIBPATH if there
# are no directories specified by -L.
hardcode_minus_L=yes
@ -1095,8 +1106,10 @@ else
aix4*)
allow_undefined_flag=unsupported
archive_cmds='if test -z "$export_symbols"; then $NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\' | sort | uniq' > $lib.exp;
else cat "$export_symbols" > $lib.exp; fi~ $CC -o $objdir/$soname$libobjs$deplibs ${wl}-bE:$lib.exp ${wl}-bM:SRE ${wl}-bnoentry~$AR cru $lib $objdir/$soname'
archive_cmds='$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\' | sort | uniq' > $lib.exp else cat $export_symbols > $lib.exp~
$CC -o $objdir/$soname$libobjs$deplibs ${wl}-bE:$lib.exp ${wl}-bM:SRE ${wl}-bnoentry~$AR cru $lib $objdir/$soname'
archive_sym_cmds='cat $export_symbols > $lib.exp~
$CC -o $objdir/$soname$libobjs$deplibs ${wl}-bE:$lib.exp ${wl}-bM:SRE ${wl}-bnoentry~$AR cru $lib $objdir/$soname~$rm $lib.exp'
hardcode_direct=yes
hardcode_minus_L=yes
;;
@ -1134,8 +1147,15 @@ DllMain (HINSTANCE hInst, DWORD reason, LPVOID reserved)
}
' > ltdll.c
archive_cmds='$CC -c '"`pwd`"'/ltdll.c~echo EXPORTS > $lib.exp~
if test -z "$export_symbols"; then $DLLTOOL --export-all --output-def $lib.exp;
else cat "$export_symbols" >> $lib.exp; fi~
$DLLTOOL --export-all --output-def $lib.exp~
$CC -Wl,--base-file,$soname-base -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 $libobs ltdll.$objext~
$DLLTOOL --as=$AS --dllname $soname --exclude-symbol=_cygwin_dll_entry@12 --def $lib.exp --base-file $soname-base --output-exp $soname-exp~
$CC -Wl,--base-file,$soname-base $soname-exp -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 -o $lib $libobjs ltdll.$objext$deplibs~
$DLLTOOL --as=$AS --dllname $soname --exclude-symbol=_cygwin_dll_entry@12 --def $lib.exp --base-file $soname-base --output-exp $soname-exp~
$CC $soname-exp -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 -o $lib $libobjs ltdll.$objext$deplibs~
$rm ltdll.$objext $soname-base $soname-exp'
archive_sym_cmds='$CC -c '"`pwd`"'/ltdll.c~echo EXPORTS > $lib.exp~
cat "$export_symbols" > $lib.exp~
$CC -Wl,--base-file,$soname-base -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 $libobs ltdll.$objext~
$DLLTOOL --as=$AS --dllname $soname --exclude-symbol=_cygwin_dll_entry@12 --def $lib.exp --base-file $soname-base --output-exp $soname-exp~
$CC -Wl,--base-file,$soname-base $soname-exp -Wl,--dll -nostartfiles -Wl,-e,__cygwin_dll_entry@12 -o $lib $libobjs ltdll.$objext$deplibs~
@ -1262,6 +1282,8 @@ DllMain (HINSTANCE hInst, DWORD reason, LPVOID reserved)
archive_cmds='$CC -shared ${wl}-h $wl$soname -o $lib$libobjs$deplibs'
else
archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib$libobjs$deplibs'
archive_sym_cmds='$echo "{ global:" > $lib.exp~sed $export_symbols -e "s/.*/\1;/" >> $lib.exp~$echo "local: * }" > $lib.exp~
$LD -G${allow_undefined_flag} -M $export_symbols -h $soname -o $lib$libobjs$deplibs~$rm $lib.exp'
fi
hardcode_libdir_flag_spec='-R$libdir'
hardcode_shlibpath_var=no

37
ltmain.in
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@ -646,15 +646,6 @@ compiler."
$echo "$modename: symbol file \`$arg' does not exist"
exit 1
fi
if test -n "$export_dynamic_flag_spec"; then
eval arg=\"$export_dynamic_flag_spec\"
else
arg=
fi
# Add the symbol object into the linking commands.
compile_command="$compile_command @SYMFILE@"
finalize_command="$finalize_command @SYMFILE@"
prev=
;;
release)
@ -718,10 +709,6 @@ compiler."
;;
-export-symbols)
if test "$export_dynamic" != no; then
$echo "$modename: cannot have both -export-dynamic and -export-symbols"
exit 1
fi
if test -n "$export_symbols"; then
$echo "$modename: cannot have more than one -exported-symbols"
exit 1
@ -1075,6 +1062,11 @@ compiler."
exit 1
fi
if test -n "$export_symbols" && test "$module" = yes; then
$echo "$modename: \`-export-symbols' is not supported for modules"
exit 1
fi
oldlibs=
# calculate the name of the file, without its directory
outputname=`$echo "X$output" | $Xsed -e 's%^.*/%%'`
@ -1112,6 +1104,10 @@ compiler."
$echo "$modename: warning: \`-release' is ignored for archives" 1>&2
fi
if test -n "$export_symbols"; then
$echo "$modename: warning: \`-export-symbols' is ignored for archives" 1>&2
fi
# Now set the variables for building old libraries.
build_libtool_libs=no
oldlibs="$output"
@ -1566,7 +1562,11 @@ EOF
fi
# Do each of the archive commands.
eval cmds=\"$archive_cmds\"
if test -n "$export_symbols" && test -n "$archive_sym_cmds"; then
eval cmds=\"$archive_sym_cmds\"
else
eval cmds=\"$archive_cmds\"
fi
IFS="${IFS= }"; save_ifs="$IFS"; IFS='~'
for cmd in $cmds; do
IFS="$save_ifs"
@ -1583,8 +1583,8 @@ EOF
fi
done
# If -export-dynamic/symbols was specified, set the dlname.
if test "$export_dynamic" = yes || test -n "$export_symbols"; then
# If -export-dynamic was specified, set the dlname.
if test "$export_dynamic" = yes; then
# On all known operating systems, these are identical.
dlname="$soname"
fi
@ -1746,8 +1746,7 @@ EOF
finalize_command=`$echo "X$finalize_command " | $Xsed -e "$los2o" -e 's/ $//'`
fi
if { test "$export_dynamic" = yes || test "$export_dynamic" = yes; } &&
test -n "$NM" && test -n "$global_symbol_pipe"; then
if test "$export_dynamic" = yes && test -n "$NM" && test -n "$global_symbol_pipe"; then
dlsyms="${outputname}S.c"
else
dlsyms=
@ -1886,7 +1885,7 @@ dld_preloaded_symbols[] =
exit 1
;;
esac
elif test "$export_dynamic" != yes && test -z "$export_symbols"; then
elif test "$export_dynamic" != yes; then
test -n "$dlfiles$dlprefiles" && $echo "$modename: warning: \`-dlopen' and \`-dlpreopen' are ignored without \`-export-dynamic'" 1>&2
else
# We keep going just in case the user didn't refer to

4
mdemo/modules/Makefile.am
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@ -10,9 +10,9 @@ INCLUDES = -I$(srcdir)/../../libltdl
lib_LTLIBRARIES = libfoo1.la libfoo2.la
libfoo1_la_SOURCES = foo1.c
libfoo1_la_LDFLAGS = -export-symbols $(srcdir)/libfoo1.sym -lm -module
libfoo1_la_LDFLAGS = -export-dynamic -lm -module
libfoo2_la_SOURCES = foo2.c
libfoo2_la_LDFLAGS = -export-symbols $(srcdir)/libfoo2.sym -lm -module
libfoo2_la_LDFLAGS = -export-dynamic -lm -module
include_HEADERS = foo.h

3
mdemo/modules/libfoo1.sym
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@ -1,3 +0,0 @@
libfoo1_LTX_nothing
libfoo1_LTX_foo1
libfoo1_LTX_hello

3
mdemo/modules/libfoo2.sym
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@ -1,3 +0,0 @@
libfoo2_LTX_nothing
libfoo2_LTX_foo2
libfoo2_LTX_hello