[GRASS-git] [OSGeo/grass] 387658: Allow to use a fixed random seed via SOURCE_DATE_E...

[Bernhard M. Wiedemann]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: 38765847ba78bbdd4fc916e835dd0291988b3aed
      https://github.com/OSGeo/grass/commit/38765847ba78bbdd4fc916e835dd0291988b3aed
  Author: Bernhard M. Wiedemann <githubbmw at lsmod.de>
  Date:   2019-12-17 (Tue, 17 Dec 2019)

  Changed paths:
    M lib/gis/lrand48.c
    M lib/raster/color_rand.c
    M raster/r.flow/main.c
    M raster/r.spread/main.c
    M raster/r.surf.fractal/spec_syn.c
    M raster/r.surf.gauss/gaussurf.c
    M raster/r.surf.random/randsurf.c
    M vector/v.extract/main.c
    M vector/v.kcv/main.c
    M vector/v.qcount/findquads.c

  Log Message:
  -----------
  Allow to use a fixed random seed via SOURCE_DATE_EPOCH (#251)

* Allow to use a fixed random seed via SOURCE_DATE_EPOCH

this will make builds reproducible by default
for those that want it.

See https://reproducible-builds.org/ for why this matters
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.

* Replace obsolete srand FIXME with doc