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Improved seed() generation

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Drop support for CLOCK_SGI_CYCLE.

Improved seed() generation.  Improved some comments in seed.c.
Added have_environ.c to build have_environ.h in order to
determine if:

    extern char **environ;	/* user environment */

is an valid external symbol.
This commit is contained in:
Landon Curt Noll
2021-12-06 21:16:08 -08:00
parent 7417f2e776
commit b30c5c1855
7 changed files with 213 additions and 74 deletions
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6
help/seed
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@@ -25,8 +25,8 @@ DESCRIPTION
sequence each time they are run.
The return value of this builtin function should NOT be considered
a random or pseudo-random value. The return value should be used
as an argument to a seed function such as srand() or srandom().
a random or pseudo-random value. The return value could be used
as an argument to seed functions such as srand() or srandom().
EXAMPLE
; print srand(seed())
@@ -44,7 +44,7 @@ LINK LIBRARY
SEE ALSO
seed, srand, randbit, isrand, rand, random, srandom, israndom
## Copyright (C) 1999,2018 Landon Curt Noll
## Copyright (C) 1999,2018,2021 Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License