[postgis-tickets] [PostGIS] #4629: Remove NUMERICFLAGS

[PostGIS]

#4629: Remove NUMERICFLAGS
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 Reporter:  Algunenano   |      Owner:  Algunenano
     Type:  enhancement  |     Status:  assigned
 Priority:  medium       |  Milestone:  PostGIS 3.1.0
Component:  postgis      |    Version:  master
 Keywords:               |
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 While looking at other flags, I noticed the existence of `NUMERICFLAGS`
 which activates `-ffloat-store` if available.

 I have 2 issues with this:
 * It's only used in some parts (liblwgeom/ and libpgcommon/), while other
 folders know nothing about it.
 * It's bad for precision (you voluntarily accept less precision) and, I
 guess, performance since you are not using the registers.

 As of today, I get the same results for clang (without that option) and
 with GCC (which has that flag available), so I suggest dropping it
 altogether and in the case that we find some difference in an output, try
 to change it to allow both 80bit and 64bit precision in double operations.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4629>
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