Something

tar -jxf thunderbird-2.0.0.0.tar.bz2 ; cd mozilla
make -f client.mk build

.mozconfig:
ac_add_options --disable-optimize
ac_add_options --enable-debug
ac_add_options --enable-default-toolkit=cairo-gtk2
ac_add_options --disable-javaxpcom
ac_add_options --enable-debugger-info-modules=yes
ac_add_options --enable-extensions=default,lightning,inspector
mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/obj-@CONFIG_GUESS@
mk_add_options MOZ_BUILD_PROJECTS="calendar mail"
mk_add_options MOZ_CO_PROJECT="calendar mail"
ac_add_app_options calendar --enable-application=calendar
ac_add_app_options mail --enable-application=mail

c++  -fno-rtti -fno-exceptions -Wall -Wconversion -Wpointer-arith -Wcast-align -Woverloaded-virtual -Wsynth -Wno-ctor-dtor-privacy -Wno-non-virtual-dtor -Wno-long-long -pedantic -fshort-wchar -pthread -pipe  -DDEBUG -D_DEBUG -DDEBUG_russell -DTRACING -g -fno-inline -fPIC -shared -Wl,-z,defs -Wl,-h,libxpcom_core.so -o libxpcom_core.so  pldhash.o nsCOMPtr.o nsComponentManagerUtils.o nsDebug.o nsID.o nsIInterfaceRequestorUtils.o nsINIParser.o nsMemory.o nsTraceRefcnt.o nsWeakReference.o nsGREGlue.o nsVersionComparator.o nsTHashtable.o nsTArray.o nsGenericFactory.o nsXPComInit.o nsStringAPI.o             -Wl,--whole-archive ../../dist/lib/libxpcomds_s.a ../../dist/lib/libxpcomio_s.a ../../dist/lib/libxpcomcomponents_s.a ../../dist/lib/libxpcomthreads_s.a ../../dist/lib/libxpcomproxy_s.a ../../dist/lib/libxpcombase_s.a ../../dist/lib/libxptcall.a ../../dist/lib/libxptinfo.a ../../dist/lib/libxpt.a ../../dist/lib/libxptcmd.a ../../dist/lib/libstring_s.a  -Wl,--no-whole-archive  -L../../dist/lib -lplds4 -lplc4 -lnspr4 -lpthread -ldl -ldl -lm
/usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../x86_64-suse-linux/bin/ld: nsCOMPtr.o: relocation R_X86_64_PC32 against `nsGetServiceByContractIDWithError::operator()(nsID const&, void**) const' can not be used when making a shared object; recompile with -fPIC
/usr/lib64/gcc/x86_64-suse-linux/4.1.2/../../../../x86_64-suse-linux/bin/ld: final link failed: Bad value
collect2: ld returned 1 exit status
gmake[5]: *** [libxpcom_core.so] Error 1
gmake[5]: Leaving directory `/home/russell/tb2000/mozilla/obj-x86_64-unknown-linux-gnu/calendar/xpcom/build'
gmake[4]: *** [libs] Error 2