Re: [xmlblaster] Compiling cpp client in mac osx

[Marcel Ruff <mr at marcelruff.info>]

Hi,

if have added a

int main()
{
  struct hostent hostbuf, *hostP = 0;
  char *tmphstbuf=0;
  size_t hstbuflen=0;
  char serverHostName[256];
  strcpy(serverHostName, "localhost");
  hostP = gethostbyname_re(serverHostName, &hostbuf, &tmphstbuf, 
&hstbuflen);
  printf("Hello '%s'\n", hostP->h_name);
  return 0;
}

to msgUtil.c, please check it out from svn and compile it with

cd xmlBlaster/src/c/util
gcc -g -Wall -o msgUtil msgUtil.c helper.c -I.. -DMSG_UTIL_MAIN=1

and now edit the settings in msgUtil.c and play with the different variants:

--------------------
#ifndef _WINDOWS   /* Windows does not support the reentrant ..._r() 
functions */
#  if defined(__sun)
#    define HAVE_FUNC_GETHOSTBYNAME_R_5 /* SUN */
#  elif defined(__alpha)
#    define HAVE_FUNC_GETHOSTBYNAME_R_3 /* OSF1 V5.1 1885 alpha */
#  elif defined(__FreeBSD__)
#    define LOCAL_GETHOSTBYNAME_R /* FreeBSD */
/* this should actually work for other platforms... so long as they 
support pthreads */
#  elif defined(__hpux) /* with gcc 2.8 - 3.4.3 */
#  else
#    define HAVE_FUNC_GETHOSTBYNAME_R_6 /* Linux */
#  endif
#endif
---------------------

... throw away everything and try the different defines directly.
(I know this is the most ugly code ever seen).

Please report which setting works for you and which __xyz??__ is defined
implicitely for MAC OS.


Ricardo Jorge Jota wrote:
> Hi,
> > What was the change you made?
> > Did the C client compile well without changes (build c), where the 
> > problems in C++ only?
> The problems is in the #include<malloc.h> 
> (./src/c/util/queue/SQLiteQueue.c:#include <malloc.h>).
>
> Now, in Mac  - using Fink - you have two include locations : /sw/lib 
> and /usr/lib. The sw is the Fink one, the usr is the os x system one.
> The include malloc.h is in /usr/lib/malloc/malloc.h. In linux the 
> right path is: /usr/lib/malloc.h. In order to solve this I changed the 
> source code, but i'm not sure the best way to do this.
we should add an include directive into build.xml, for now you
could try in build.properties:
 CFLAGS=-I/usr/lib/malloc
or on command line
 build -verbose -DCFLAGS=-I/usr/lib/malloc c-delete c-lib

thanks
Marcel

> > > After this problem was solved the following command (the ./build 
> > > -verbose cpp showed me the command)
> > > gcc -g -prebind -dynamiclib -o libxmlBlasterClientCD.dylib 
> > > ../build.tmp/objCD/helper.o 
> > > ../build.tmp/objCD/XmlBlasterAccessUnparsed.o 
> > > ../build.tmp/objCD/CallbackServerUnparsed.o 
> > > ../build.tmp/objCD/XmlBlasterConnectionUnparsed.o 
> > > ../build.tmp/objCD/msgUtil.o ../build.tmp/objCD/xmlBlasterSocket.o 
> > > ../build.tmp/objCD/SQLiteQueue.o ../build.tmp/objCD/Properties.o 
> > > ../build.tmp/objCD/xmlBlasterZlib.old: warning prebinding disabled 
> > > because of undefined symbols
> >
> > This is the C shared lib linking output on my Linux box:
> >
> > gcc -g -shared -o libxmlBlasterClientCD.so 
> > ../build.tmp/objCD/helper.o 
> > ../build.tmp/objCD/XmlBlasterAccessUnparsed.o 
> > ../build.tmp/objCD/CallbackServerUnparsed.o 
> > ../build.tmp/objCD/XmlBlasterConnectionUnparsed.o 
> > ../build.tmp/objCD/msgUtil.o ../build.tmp/objCD/xmlBlasterSocket.o 
> > ../build.tmp/objCD/SQLiteQueue.o ../build.tmp/objCD/Properties.o 
> > ../build.tmp/objCD/xmlBlasterZlib.o -L/opt/sqlite-bin/lib -lsqlite 
> > -L/opt/zlib-bin/lib -lz
> >
> > I wonder why cpptasks leaves away the sqlite and zlib in your case 
> > (pthread is not needed explicitly on Linux).
> I think the problem lies within the -prebind flag. From what I could 
> gather this allows you to remove the gcc -L and -l flags. Although i'm 
> not sure about this it seams that the /sw/lib path -the fink path - 
> isn't prebound (OSX prebind all their dylib.). I'm not sure if you can 
> disable -prebind in the cpp-tasks when the MAC OSX system is found.
>
> > > Unfortunately _gethostbyname_r doesn't get solved and after 
> > > "googling" it seems that this symbols doesn't exist in OS X.
> > This is just the thread safe variant of gethostbyname().
> > Please add your own gethostbyname_r() variant in your code and 
> > implement it using
> > gethostbyname().
>
> I'd love to implement a new one. But I have some questions about you 
> code. First and foremost i'd like to test the ones already coded. Now 
> if I read you code correctly you use #defines to select the correct 
> one. As the darwin - the osx "kernel"- is mostly bsd maybe the bsd 
> implementation works. But I don't know how to find the correct #define 
> value for osx. Can you shed some light on this ?
>
> Thank in advance,
> Ricardo Jota