dynamic link question

I have three dynamic link file:

libwelcome.so

libwelcome2.so

testFunction.so

and a executable file:

testMain

testFunction.so depends on libwelcome2.so

testMain depends on testFunction.so and libwelcome.so

CC -G -o testFunction.so libwelcome2.so testFunction.o

CC -o testMain libwelcome.so testFunction.so

ldd testFunction.so

libwelcome2.so =>.//libwelcome2.so

ldd testMain

libwelcome.so => .//libwelcome.so

testFunction.so =>.//testFunction.so

libCstd.so.1 => /usr/lib/libCstd.so.1

libCrun.so.1 => /usr/lib/libCrun.so.1

libm.so.2 =>/lib/libm.so.2

libc.so.1 =>/lib/libc.so.1

libwelcome2.so =>.//libwelcome2.so

/usr/lib/cpu/sparcv8plus/libCstd_isa.so.1

/platform/SUNW,Sun-Blade-1500/lib/libc_psr.so.1

There is a same function(char* welcome(char*)) in welcome.cc and welcome2.cc

testFunction.cc invokes it of welcome2.cc by "dlopen" and "dlsym"

testMain.cc invokes it of welcome.cc by "dlopen" and "dlsym"

I use dlopen as

dlopen(NULL, RTLD_NOW);

but if I execute the program ./testMain

actually, both testMain and testFunction will use the function "welcome" of welcome.cc

How can I force testFunction.cc to find the symbol in the dynamic link file which name indicated during the compiling time( welcome2.so)

[1413 byte] By [shock_ua] at [2007-11-27 1:35:16]