maintainer-feedback requested: [Bug 229597] converters/p5-Encode-Detect build error missing stdc++

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Bug 229597: converters/p5-Encode-Detect build error missing stdc++
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229597



--- Description ---
During build of /usr/ports/converters/p5-Encode-Detect
/usr/local/bin/ld: cannot find -lstdc++
Error code 2

Enclosed patch enables build with clang 6.0.0 on "FreeBSD 11.2-STABLE  r336017M
    i386 hqdev-amd64-smp-vga 1102501 1102501"

A gcc7 build will require something like 
+     extra_linker_flags => ['-L/usr/local/lib/gcc7/ -lstdc++'],

unfortunately issues with -fstack-protector-strong with arose.