sudo port install mldonkey

[Charlse Darwin]

$ sudo port install mldonkey
--->  Building ocaml with target world.opt
Error: Target org.macports.build returned: shell command " cd "/opt/ 
local/var/macports/build/ 
_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_oc 
aml/work/ocaml-3.10.0" && unset LD_PREBIND LD_PREBIND_ALLOW_OVERLAP  
&& make world.opt " returned error 2
Command output: cd byterun; make all
make[1]: Nothing to be done for `all'.
if test -f stdlib/libcamlrun.a; then :; else \
           ln -s ../byterun/libcamlrun.a stdlib/libcamlrun.a; fi
cd yacc; make all
make[1]: Nothing to be done for `all'.
cd lex; make all
make[1]: Nothing to be done for `all'.
cd tools; make all
make[1]: Nothing to be done for `all'.
cd stdlib; make all
make[1]: Nothing to be done for `all'.
cd asmrun; make all
gcc -I../byterun -DCAML_NAME_SPACE -DNATIVE_CODE -DTARGET_power - 
DSYS_rhapsody  -O -Wall -DDARWIN_VERSION_6  -D_FILE_OFFSET_BITS=64 - 
D_REENTRANT   -c -o signals_asm.o signals_asm.c
signals_asm.c: In function 'handle_signal':
signals_asm.c:87: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:87: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:88: error: 'struct mcontext' has no member named '__ss'
signals_asm.c: In function 'trap_handler':
signals_asm.c:160: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:161: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:163: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:164: error: 'struct mcontext' has no member named '__ss'
signals_asm.c: In function 'segv_handler':
signals_asm.c:193: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:193: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:198: error: 'struct mcontext' has no member named '__ss'
signals_asm.c:199: error: 'struct mcontext' has no member named '__ss'
make[1]: *** [signals_asm.o] Error 1
make: *** [runtimeopt] Error 2

Error: The following dependencies failed to build: lablgtk ocaml
Error: Status 1 encountered during processing.