[Bug 273998] devel/elfutils: fix build with lld 17

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 21 Sep 2023 16:06:17 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273998

            Bug ID: 273998
           Summary: devel/elfutils: fix build with lld 17
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: cem@freebsd.org
          Reporter: dim@FreeBSD.org
          Assignee: cem@freebsd.org
             Flags: maintainer-feedback?(cem@freebsd.org)

Building devel/elfutils with lld 17 results in the following link error:

cc -std=gnu99 -Wall -Wshadow -Wformat=2 -Wold-style-definition
-Wstrict-prototypes    -Wnull-dereference -Wimplicit-fallthrough -Werror
-Wunused -Wextra     -D_FORTIFY_SOURCE=3 -O2 -pipe  -I/usr/local/include
-I/usr/local/share/gnulib/lib -Wno-error -Wno-format-nonliteral
-Wno-null-dereference -Wno-unused-value -DFREEBSD_HAS_MEMPCPY
-fstack-protector-strong -fno-strict-aliasing   /usr/local/lib/libargp.so 
/usr/local/lib/libintl.so -fstack-protector-strong  -Wl,--build-id -o libelf.so
-shared -Wl,-z,defs -Wl,-z,relro -o libelf.so \
        -Wl,--soname,libelf.so.1 \
        -Wl,--version-script,libelf.map,--no-undefined \
        -Wl,--whole-archive libelf_pic.a -Wl,--no-whole-archive \
        ../lib/libeu.a -lz 
ld: error: version script assignment of 'ELFUTILS_1.0' to symbol 'elf_scncnt'
failed: symbol not defined
cc: error: linker command failed with exit code 1 (use -v to see invocation)

Upstream removed the symbol which apparently was never implemented in:
<https://sourceware.org/git/?p=elfutils.git;a=commit;h=09e61a65953ed814d9e970f7f9ffb9c2d8cda477>.
I tried adding this via PATCH_SITES and PATCHFILES, but it looks like the ports
framework chokes on URLs with ? in them, so I'm adding a regular patch file in
devel/elfutils/files/patch-libelf_libelf.map file instead.

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