[build] Remove support for alternative Solaris 11.4 ld -V output

Rainer Orth ro@CeBiTec.Uni-Bielefeld.DE
Mon Jun 17 08:42:00 GMT 2019

I've been informed that parsing of Solaris ld -V output doesn't work
with Solaris sed.  The problem is that the alternation used since

	[build] Cleanup Solaris linker version checks

isn't recognized by /usr/bin/sed and /usr/xpg4/bin/sed which can only
handle BREs.  This means that all features dependent on ld version
checking aren't supported anymore.

I hadn't recognized this before since I've been using GNU sed
exclusively.  While Illumos sed could work around this by using sed -E
instead, which enables ERE support, this option isn't recognized by
Solaris sed.

Fortunately, the fix is simple: the alternative ld -V output format
handled since the patch above never made it into a non-beta version of
Solaris, and never will, so I'm just removing this again.

Bootstrapped without regressions on i386-pc-solaris2.11 and
sparc-sun-solaris2.11.   Installed for mainline now; will backport to
the gcc-9 and gcc-8 branches after some soak time.

For good measure, I've also run Solaris bootstraps with /usr/bin in
front of /usr/gnu/bin, but this issue was the only difference.


Rainer Orth, Center for Biotechnology, Bielefeld University

2019-06-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	* configure.ac (ld_vers) <*-*-solaris2*>: Remove support for
	alternative Solaris 11.4 format.
	* configure: Regenerate.

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