Commits on Dec 31, 2019

1. build: fix developer mode compilation on FreeBSD …

   Recent FreeBSD versions use LLVM's lld as a linker, not the GNU ld.
   Their behavior slightly differs, so adapt the build system to handle
   either one.
   
   * The LLVM's linker prints "undefined symbol:" instead of
     "undefined reference to". Tweak tools/mockup.sh to also look for that
     message.
   
   * The LLVM's linker may only print the first dozen errors (omitting
     the rest to avoid flooding the screen). tools/update-mocks.sh relies
     on getting all errors as it extracts the missing symbols' names from
     the error output and creates mocks for them. Detect if errors were
     omitted and re-run, telling the linker to not omit any. The GNU linker
     does not support -error-limit=0, so unfortunately we can't just run
     with that option unconditionally from the first attempt.
   
   * Nit: FreeBSD's sed(1) prints "t" for "\t" instead of a horizontal tab.
     Use a verbatim tab in the command, instead of "\t" which works on
     both.
   
   Changelog-Fixed: Developer mode compilation on FreeBSD.

   

   vasild committed Dec 31, 2019
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