[Bug 221809] print/openprinting: linker invoked with invalid -Mmapfile argument

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221809

            Bug ID: 221809
           Summary: print/openprinting: linker invoked with invalid
                    -Mmapfile argument
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: emaste at freebsd.org
            Blocks: 214864

I've been investigating building the ports tree with LLVM's lld installed as
/usr/bin/ld (via the exp-run in PR 214864). Through this I've found a few
common issues, some of which are due to limitations of lld or choices made by
its authors, and some of which are problems in the ports themselves.
print/openprinting is affected by one of the latter cases.

When linking with lld the build failed with:

cc -shared  .libs/common.o .libs/uri.o .libs/list.o .libs/attribute.o
.libs/status.o .libs/library.o .libs/misc.o  -L/usr/local/lib -lintl 
-Wl,-Mmapfile -Wl,-soname -Wl,libpapi-common.so.0 -o
.libs/libpapi-common.so.0.0.0
/usr/bin/ld: error: unknown argument: -Mmapfile

GNU ld documents -M as:
       -M
       --print-map
           Print a link map to the standard output.  A link map provides
           information about the link, including the following:

to write the mapping to a file the argument is:

       -Map mapfile
           Print a link map to the file mapfile.  See the description of the
           -M option, above.

so presumably this should be using -Wl,-Map,mapfile in $LDFLAGS

It appears that when GNU ld is invoked with -Mmapfile outputs the mapfile to
stdout and discards the rest of the argument.


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214864
[Bug 214864] [exp-run] test build with lld as /usr/bin/ld
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