[erlang-questions] OTP13B03 failed to make parallel on OS X 10.6 in 64-bit: ld: duplicate symbol _debug in debuglog.o and esock.o

Mikael Pettersson <>
Thu Dec 17 11:39:54 CET 2009


Illo de' Illis writes:
 > On Dec 17, 2009, at 5:12 AM, Ceriel Jacobs wrote:
 > > On 16 dec 2009, at 22:05 Illo de Illis wrote:
 > >> Try and edit files lib/ssl/c_src/debuglog.h and lib/ssl/esock_ssl.h and prepend an 'extern' to every definition in order to change them to declarations.
 > > That doesn't sound like a good idea to me:
 > > 1. I am not a C programmer, I don't know what a definition in C is; in other words I don't know what I am editing in such a header file
 > > 2. With me editing in my local files, will bring back these errors every new release 
 > 
 > Looks like erlang developers are in the process of cleaning up the duplicate symbols for the next release, so I guess you won't have to do it again in R13B04.
 > I've attached a patch file that does the job.
 > 
 > Ciao,
 > Illo.
 >
 > diff --git erts/emulator/beam/global.h erts/emulator/beam/global.h
 > index 62a788c..87e83e3 100644
 > --- erts/emulator/beam/global.h
 > +++ erts/emulator/beam/global.h
 > @@ -1658,7 +1658,7 @@ void erts_bif_trace_init(void);
 >  /*
 >  ** Call_trace uses this API for the parameter matching functions
 >  */
 > -    struct erl_heap_fragment* saved_program_buf;
 > +/*    struct erl_heap_fragment* saved_program_buf; */
 >  
 >  #define MatchSetRef(MPSP) 			\
 >  do {						\
 > diff --git lib/erl_interface/src/misc/ei_internal.h lib/erl_interface/src/misc/ei_internal.h
 > index 9f51d1f..f7805ef 100644
 > --- lib/erl_interface/src/misc/ei_internal.h
 > +++ lib/erl_interface/src/misc/ei_internal.h
 > @@ -149,7 +149,7 @@
 >    {if (ei_tracelevel >= 5) ei_trace_printf(NAME,1,FORMAT,ARG1,ARG2,ARG3,ARG4, \
 >                                                           ARG5,ARG6,ARG7);}
 >  
 > -int ei_tracelevel;
 > +extern int ei_tracelevel;

extern in variable declarations in .h files is correct
(and not having the extern there is almost always incorrect).

 > -void open_ssllog(char *path);
 > -void close_ssllog(void);
 > -FILE *openlog(char *);
 > -void closelog(FILE *);
 > -int __debugprintf(const char *, ...);
 > -int __debugprintclistf(const char *, ...);
 > -int __debuglogf(const char *, ...);
 > +extern void open_ssllog(char *path);
 > +extern void close_ssllog(void);
 > +extern FILE *openlog(char *);
 > +extern void closelog(FILE *);
 > +extern int __debugprintf(const char *, ...);
 > +extern int __debugprintclistf(const char *, ...);
 > +extern int __debuglogf(const char *, ...);

extern in function declarations in .h files is not needed
and just plain redundant.


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