[Bug 258394] archivers/upx: fix build with clang 13

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 09 Sep 2021 19:18:08 UTC

            Bug ID: 258394
           Summary: archivers/upx: fix build with clang 13
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: fjoe@FreeBSD.org
          Reporter: dim@FreeBSD.org
             Flags: maintainer-feedback?(fjoe@FreeBSD.org)
          Assignee: fjoe@FreeBSD.org

During an exp-run for llvm 13 (see bug 258209), it turned out that
archivers/upx fails to build with clang 13 [1]:

p_wcle.cpp:739:27: error: variable 'n' set but not used
    unsigned count,object,n,r;
1 error generated.

This is because clang 13 now has a -Wunused-but-set-variable warning similar to
gcc's, and it is enabled under -Wall.

The p_wcle.cpp file has two instances where the 'n' variable is used for
debugging purposes, but the first instance is marked with UNUSED(n). The second
is not, triggering this warning.


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