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ERROR: more than one instance of overloaded function "vprintf" has "C" linkage

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Operating Systems HP-UX ERROR: more than one instance of overloaded function "vprintf" has "C" linkage
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Old 10-14-2008
ERROR: more than one instance of overloaded function "vprintf" has "C" linkage

Hi people!
I've got this own library:
   #ifdef __cplusplus  
   extern "C" {  
   #include <stdio.h>  
   #include <stdarg.h>  
   #include <string.h>  
   #include <assert.h>  
   MY_STREAM *wprintf(MY_STREAM *_this, const char *format, ...);  
   #ifdef __cplusplus  

Well, this function 'wprintf()' already exists in /usr/include/wchar.h. I can't change Personal.h, because is a customer's library.

I have problems when i try to compile a C++ program -my_program.C- (each one that includes Personal.h).

More, compiling it in a HP-UX B.11.11 PA_RISC (with CC compiler) it was OK. But now, compiling it in a HP-UX B.11.23 ITANIUM (with aCC) I obtain this error:
"/usr/include/wchar.h", line 134: error #2338: more than one instance of overloaded function "wprintf" has "C" linkage  
               extern int wprintf __((const wchar_t *, ...));  

It could be a problem in the order of include files passing to the compiler, but i think it's fine.

I put down the logs of compiler (using option -v). I hope someone can help me.
Best regards!

HP-UX B.11.11 PA-RISC (CC)
/opt/CC/bin/CC -v   
       +a1 -Aa +DAportable +DS1.1 +z -c /..../my_program.C  
       -I<all my include dirs, here are included Personal.h>  
       -I<all my include dirs, here are included Personal.h>  
       -D__hp9000s700 -D_PA_RISC1_1 -$ -Z -Dc_plusplus -D__cplusplus -D__hp9000s800 -D__hppa -D__hpux -D__unix -Dhp9000s800  
       -Dhppa -Dhpux -Dunix -I/opt/CC/include/CC -I/usr/include /..../my_program.C /var/tmp/AAAa05164.i  
    /opt/CC/lbin/cfront +DAportable +DS1.1 +z +a1 +b1 +T/var/tmp/BAAa05164 +s +t/var/tmp/CAAa05164  
    +f/..../my_program.C +XCddp_data.o </var/tmp/AAAa05164.i

/opt/aCC/lbin/ecom -architecture 32 -ia64abi all -inst compiletime  
   -sysdir /usr/include -test namespaces -koenig_lookup on -ansi_for_scope on -inline_power 1 -link_type dynamic  
   -fpeval float -fpevaldec _Decimal32 -tls_dyn on -target_os 11.23   
   <all my include dirs, here are included Personal.h>  
   --sys_include /opt/aCC/include_std  
   --sys_include /opt/aCC/include_std/iostream_compat  
   --sys_include /usr/include --sys_include /usr -D_HP_IA64ABI -D_BIND_LIBCALLS -D_Math_errhandling=MATH_ERREXCEPT  
   -D__hpux -D__unix -D__ia64=1 -D__ia64__=1 -D_BIG_ENDIAN=1 -D__STDCPP__ -D_HP_NAMESPACE_STD -D_ILP32  
   -DMOTIF -DY2000 -DSPANIEN -ucode hdriver=optlevel%1% -plusolistoption -Ol06all! -plusolistoption -Ol13moderate!  
   -plusooption -Oq01,al,ag,cn,sz,ic,vo,Mf,Po,es,rs,Rf,Pr,sp,in,cl,om,vc,pi,fa,pe,rr,pa,pv,nf,cp,lx,Pg,ug,l

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