Path: utzoo!utgpu!cunews!bnrgate!brchh104!brchs1!bnr.ca!rice.edu!sun-spots-request
From: auspex!guy@uunet.uu.net (Guy Harris)
Newsgroups: comp.sys.sun
Subject: "dlsym" issue (was Re: Sun-Spots Digest, v10n86 [Miscellaneous])
Keywords: Miscellaneous
Message-ID: <3795@brchh104.bnr.ca>
Date: 12 Jun 91 19:40:00 GMT
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Organization: Sun-Spots
Lines: 22
Approved: Sun-Spots@rice.edu
X-Original-Date: 6 Jun 91 00:20:22 GMT
X-Sun-Spots-Digest: Volume 10, Issue 106, message 15
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>	myloadedfunc1 = dlsym(libhandle, "_func1");

BTW, if the name of the function that you're trying to get a pointer to is
"func1", pass "func1", *not* "_func1", to "dlsym()".

Both may *work* in SunOS 4.1; however, not *all* systems with "dlsym()"
have compilers that prepend underscores to symbol names, and I don't know
if the "dlsym()" on any of those System V Release 4 systems will be
"polite" enough to find "func1" if asked for "_func1".

I.e.,

	dlsym(libhandle, "func1")

should find the function whose name, in the C source code that defines
it, is "func1", both in SunOS 4.1 and System V Release 4; however, while

	dlsym(libhandle, "_func1")

will find it in SunOS 4.1, it may not find it in System V Release 4, so
the former, as it may work on more systems, is preferable to the latter.