Resolve which type of linker is used and assign proper linking flags

[petricm]

resolves #733
BEGINRELEASENOTES

• Resolve which type of linker is used and assign proper linking flags

ENDRELEASENOTES

The approach is based calling compiler -Wl,--version which gives:

• for normal GNU ld

  $ g++ -Wl,--version
  collect2 version 9.2.0
  GNU ld (GNU Binutils) 2.30
  Copyright (C) 2018 Free Software Foundation, Inc.
  This program is free software; you may redistribute it under the terms of
  the GNU General Public License version 3 or (at your option) a later version.
  This program has absolutely no warranty.
  

• for GNU gold

  $ g++ -fuse-ld=gold -Wl,--version
  collect2 version 9.2.0
  GNU gold (GNU Binutils 2.30) 1.15
  Copyright (C) 2018 Free Software Foundation, Inc.
  This program is free software; you may redistribute it under the terms of
  the GNU General Public License version 3 or (at your option) a later version.
  This program has absolutely no warranty.
  

• for LLD

  $ g++ -fuse-ld=lld -Wl,--version
  collect2 version 9.2.0
  LLD 4.0.1 (tags/RELEASE_401/final 306736) (compatible with GNU linkers)
  

• for macOS

  $ clang++ -Wl,-v       
  @(#)PROGRAM:ld  PROJECT:ld64-609
  BUILD 18:16:50 Sep 24 2020
  configured to support archs: armv6 armv7 armv7s arm64 arm64e arm64_32 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em
  Library search paths:
    /usr/local/lib
    /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib
  Framework search paths:
    /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/
  Undefined symbols for architecture x86_64:
    "_main", referenced from:
       implicit entry/start for main executable
  ld: symbol(s) not found for architecture x86_64
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  

ld, gold and lld all accept the flag --no-undefined the only case where -undefined,error needs to be used is the macOS linker