[Bug 222872] lang/ruby22: does not build with POSIX-compliant sh -c

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222872

            Bug ID: 222872
           Summary: lang/ruby22: does not build with POSIX-compliant sh -c
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ruby at FreeBSD.org
          Reporter: jilles at FreeBSD.org
            Blocks: 220587
             Flags: maintainer-feedback?(ruby at FreeBSD.org)
          Assignee: ruby at FreeBSD.org

Created attachment 187013
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=187013&action=edit
allow both current and POSIX-compliant sh -c

The RB_SET_CONF_VAR macro uses a construct like

sh -c 'command' -- arg0 arg1

and assume that $0 will expand to arg0 and $1 will expand to arg1.

Our current sh implements it that way. However, POSIX specifies that $0 will
expand to -- and $1 will expand to arg0, since the command string is an operand
and not an option-argument. Bug #220587 requests making sh POSIX-compliant in
this regard.

If the argument after the command string does not start with '-', the current
sh behaves as required by POSIX. Therefore, the macros should be adjusted so
this is always the case.

Tested with poudriere, stable/10 with patched head sh.


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220587
[Bug 220587] /bin/sh Incorrect options handling
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