Build fail for 7.3.0 with in-tree binutils

[flandraco]

A year late and happy with the solution suggested by @Jonathan Wakely.

However I need to note that the "official" instructions are if not
conflicting with Jonathan's advice, then at least they are very ambiguous:
https://gcc.gnu.org/install/download.html
Seems to indicate that binutils should be installed with the in-tree method
indeed?

*Who can update those official notes with the "working" method?*

As I build a variety of toolchains, I have established the following
"working" combinations (similar to what @Matt Godbolt is suggesting):
# GCC                =>               Binutils
  # 9.1.0: May.03/2019 => Feb.02/2019 : 2.32
  # 8.3.0: Feb.22/2019 => Feb.02/2019 : 2.32
  # 8.2.0: Jul.26/2018 => Jul.18/2018 : 2.31.1
  # 8.1.0: May.02/2018 => Jan.28/2018 : 2.30
  # 7.4.0: Dec.06/2018 => Jul.18/2018 : 2.31.1
  # 7.3.0: Jan.25/2018 => Sep.25/2017 : 2.29.1
  # 7.2.0: Aug.14/2017 => Jul.25/2017 : 2.28.1
  # 7.1.0: May.02/2017 => Mar.02/2017 : 2.28
  # 6.5.0: Oct.26/2018 => Jul.18/2016 : 2.31
  # 6.4.0: Jul.04/2017 => Mar.02/2017 : 2.28
  # 6.3.0: Dec.21/2016 => Aug.03/2016 : 2.27
  # 5.5.0: Oct.10/2017 => Sep.25/2017 : 2.29
  # 5.4.0: Jun.03/2016 => Jan.25/2016 : 2.26

Since this is based on pure dates, and not on actual branches:
*Where can I find the "correct" combination?
*



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