Fix all build warnings across release/DEBUG/TEST profiles

Clean gmake GENETIC=1 PERF_COUNTERS=1 MP=1 SIXTYFOUR=1 build had 100
warnings; DEBUG=1 and TEST=1 builds had more once actually exercised.

- OFFSET_OF/CONTAINING_STRUCT (chess.h) and PTR_TO_ALLOC_HASH (unix.c)
  truncated pointers through 32-bit ULONG before use in offset/hash
  arithmetic on this 64-bit build -- routed through size_t instead.
- Diagnostic int<->void* round-trips (command.c, root.c, split.c,
  sig.c, data.c, unix.c, util.c) widened/narrowed via size_t to avoid
  implicit truncation.
- ABS_DIFF on unsigned COOR now casts to int before abs().
- Dropped -fexpensive-optimizations (GCC-only, clang silently ignores
  it) from GNUmakefile.
- Removed genuinely dead variables (book.c, gamelist.c, split.c,
  testgenerate.c, testhash.c).
- Guarded DEBUG/PERF_COUNTERS/_X86_-only variables and the
  _CMEvidenceBucket helper under the #ifdef that actually reads them,
  since ASSERT/EVAL_TERM/KEEP_TRACK_OF_FIRST_MOVE_FHs compile away
  outside those builds.
- Added missing prototypes for SlidePawn, SlidePawnWithoutSigs,
  SlidePieceWithoutSigs (move.c), previously undeclared in chess.h.
- Removed dead _SystemIsRoot (unix.c).

Verified via precommit_check.sh: TEST=1 self-test suite passes,
DEBUG=1 smoke test (10 random ECM positions, sd 4) passes with no
crashes/assertions, release build restored -- all three profiles now
build with zero warnings.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_014Cmv11sJZqVfanrPh6UnWE

1 files changed, 5 insertions, 4 deletions

diff --git a/src/split.c b/src/split.c
index b3fc659..28d5ce0 100755
--- a/src/split.c
+++ b/src/split.c
@@ -156,8 +156,8 @@ Return value:
     SEARCHER_THREAD_CONTEXT *ctx = &(g_HelperThreads[uMyId].ctx);
     ULONG u, v;
     MOVE mv;
-    ULONG uIdleLoops = 0;
 #ifdef PERF_COUNTERS
+    ULONG uIdleLoops = 0;
     UINT64 u64Then;
     UINT64 u64Now;
 #endif
@@ -179,7 +179,9 @@ Return value:
             //
             // By now the split info is populated.
             //
+#ifdef PERF_COUNTERS
             uIdleLoops = 0;
+#endif
             ReInitializeSearcherContext(&(g_SplitInfo[u].sRootPosition), ctx);
             ctx->pSplitInfo[0] = &(g_SplitInfo[u]);
 
@@ -212,9 +214,9 @@ Return value:
                 {
                     UtilPanic(CANNOT_INITIALIZE_SPLIT,
                               &ctx->sPosition,
-                              (void *)mv.uMove,
+                              (void *)(size_t)mv.uMove,
                               &g_SplitInfo[u],
-                              (void *)v,
+                              (void *)(size_t)v,
                               __FILE__, __LINE__);
                 }
                 v++;
@@ -1056,7 +1058,6 @@ Return value:
     SCORE iAlpha = 0;
     SCORE iBeta;
     SCORE iBestScore = 0;
-    SCORE iRoughEval;
     ULONG uOrigDepth;
     ULONG uDepth;
     ULONG uMoveNum = 0;