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Re: HP-UX 11i unsatisfied symbols for libtar

From: Paul Pluzhnikov
Subject: Re: HP-UX 11i unsatisfied symbols for libtar
Date: Thu, 28 Sep 2006 08:42:36 -0700
User-agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Jumbo Shrimp, linux) writes:

> /usr/ccs/bin/ld: Unsatisfied symbols:
>   tar_close(TAR*)   (first referenced in /var/tmp//ccHgOOyd.o) (code)

Read up on name mangling.
The problem is that the symbols you have in libtar.a are "plain-C"
unmangled symbols, but the symbols you need are C++-mangled ones.

In C++ code, don't do this:

  extern int tar_extract_all(TAR*, char*);

do this instead:

  extern "C" int tar_extract_all(TAR*, char*);

If you are not prototyping these symbols yourself, but include a
header with prototypes, then the bug is in that header (it's not
C++-compatible). The fix:

extern "C" {
  #include "tar.h"

In order to understand recursion you must first understand recursion.
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