dlfcn.cc: clear previous dl errors before new dlopen, dlsym, dlclose call?

[David Huang]

Hi!
Is't needed to clear previous dl errors before new dlopen, dlsym, dlclose call?
See attach test programs.

$ gcc -shared -o demo.dll demo.c
$ gcc -shared -o demo2.dll demo2.c
$ gcc -o test test.c
$ ./test
Output:
handle = f20000
dlsym init_plugin fail
init_plugin = 0
handle2 = f20000
dlsym init_plugin fail
init_plugin = f21050

I think output maybe like these:
handle = f20000
dlsym init_plugin fail
init_plugin = 0
handle2 = f20000
init_plugin = f21050

Is it so?

Thanks.

2003-01-21  David Huang  <davehzhr@hotmail.com>

	* dlfcn.cc: Add clear_dl_error.
	(dlopen): Clear previous dl error.
	(dlsym): Ditto.
	(dlclose): Ditto.




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