[Bug 291186] ctfmerge.1: needs to document environment variable use

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 24 Nov 2025 07:42:35 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291186

            Bug ID: 291186
           Summary: ctfmerge.1: needs to document environment variable use
           Product: Documentation
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Manual Pages
          Assignee: bugs@FreeBSD.org
          Reporter: wosch@FreeBSD.org
                CC: doc@FreeBSD.org

The ctfmerge(1) manpage
https://man.freebsd.org/ctfmerge

does not mention the supported environment variables.

Fortunately, NetBSD already documented it some month ago and we can copy the
section upstream except for CTFMERGE_NUM_THREADS

https://man.netbsd.org/ctfmerge.1
https://github.com/NetBSD/src/commit/8a0c0d837af6f88a5a7d5a5081924e69cd374408

commit 8a0c0d837af6f88a5a7d5a5081924e69cd374408
Author:     christos <christos@NetBSD.org>
AuthorDate: Sat May 4 13:11:41 2024 +0000
Commit:     christos <christos@NetBSD.org>
CommitDate: Sat May 4 13:11:41 2024 +0000

    Document environment variable use.

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