Re: Bug fix for glibc broke freebsd build in REL_11_STABLE

Andrew Gierth <andrew@tao11.riddles.org.uk>

From: Andrew Gierth <andrew@tao11.riddles.org.uk>

To: Andres Freund <andres@anarazel.de>

Cc: Tom Lane <tgl@sss.pgh.pa.us>, Victor Wagner <vitus@wagner.pp.ru>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>

Date: 2018-09-04T22:06:07Z

Lists: pgsql-hackers

>>>>> "Andrew" == Andrew Gierth <andrew@tao11.riddles.org.uk> writes:

 Andrew> Specifying a recent microarch makes it use 64-bit FP registers
 Andrew> rather than 80-bit ones:

 Andrew> cc -O2 -m32 -march=skylake flttst.c && ./a.out
 Andrew> r1 = 1, r2 = 1

where "recent" means "since about 2000 or so":

cc -O2 -m32 -march=pentium4 flttst.c && ./a.out
r1 = 1, r2 = 1

(the actual requirement is for SSE2 support)

-- 
Andrew (irc:RhodiumToad)

Commits

Error out for clang on x86-32 without SSE2 support, no -fexcess-precision.
- 978515df2278 9.3.25 landed
- 29196e13cd70 9.4.20 landed
- dbbc98a9ef67 9.5.15 landed
- e553997e3f59 9.6.11 landed
- 1b8f09dbd352 10.6 landed
- 84f14fb78852 11.0 landed
- bd1463e348fc 12.0 landed
Fix 8a934d677 for libc++ and make more include order resistant.
- 1f349aa7d9a6 11.0 cited