From 14d0b514af4e70956ecc2fbf6fe4c2e745e144a8 Mon Sep 17 00:00:00 2001
From: Nat Goodspeed <nat@lindenlab.com>
Date: Tue, 18 Jul 2023 09:45:00 -0400
Subject: SL-18837: Ditch inactive llrand.cpp LL_USE_SYSTEM_RAND code.

LL_USE_SYSTEM_RAND has been disabled since June 2008; that code only clutters
the implementation we actually use.
---
 indra/llcommon/llrand.cpp | 46 +++-------------------------------------------
 1 file changed, 3 insertions(+), 43 deletions(-)

diff --git a/indra/llcommon/llrand.cpp b/indra/llcommon/llrand.cpp
index 4e4345f37a..33afc50cf7 100644
--- a/indra/llcommon/llrand.cpp
+++ b/indra/llcommon/llrand.cpp
@@ -58,48 +58,12 @@
  * to restore uniform distribution.
  */
 
+static LLRandLagFib2281 gRandomGenerator(LLUUID::getRandomSeed());
+
+// no default implementation, only specific F64 and F32 specializations
 template <typename REAL>
 inline REAL ll_internal_random();
 
-// *NOTE: The system rand implementation is probably not correct.
-#define LL_USE_SYSTEM_RAND 0
-
-/*****************************************************************************
-*   The LL_USE_SYSTEM_RAND implementation has been disabled since June 2008.
-*****************************************************************************/
-#if LL_USE_SYSTEM_RAND
-#include <cstdlib>
-
-class LLSeedRand
-{
-public:
-	LLSeedRand()
-	{
-#if LL_WINDOWS
-		srand(LLUUID::getRandomSeed());
-#else
-		srand48(LLUUID::getRandomSeed());
-#endif
-	}
-};
-static LLSeedRand sRandomSeeder;
-
-template <>
-inline F64 ll_internal_random<F64>()
-{
-#if LL_WINDOWS
-	return (F64)rand() / (F64)(RAND_MAX+1);
-#else
-	return drand48();
-#endif
-}
-
-/*****************************************************************************
-*   This is the implementation we've been using.
-*****************************************************************************/
-#else  // LL_USE_SYSTEM_RAND
-static LLRandLagFib2281 gRandomGenerator(LLUUID::getRandomSeed());
-
 template <>
 inline F64 ll_internal_random<F64>()
 {
@@ -111,11 +75,7 @@ inline F64 ll_internal_random<F64>()
 	if(!((rv >= 0.0) && (rv < 1.0))) return fmod(rv, 1.0);
 	return rv;
 }
-#endif  // LL_USE_SYSTEM_RAND
 
-/*****************************************************************************
-*   Functions common to both implementations
-*****************************************************************************/
 template <>
 inline F32 ll_internal_random<F32>()
 {
-- 
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