Fix a harmless compiler warning that crops up with SQLITE_MAX_MMAP_SIZE=0.

FossilOrigin-Name: 1277932b7e8bb36c7070ffafbf110a8e128c267b

2 files changed, 5 insertions, 1 deletions

diff --git a/src/btree.c b/src/btree.c
index 29ead1c67..9ca600e8c 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -2161,6 +2161,7 @@ int sqlite3BtreeSetCacheSize(Btree *p, int mxPage){
   return SQLITE_OK;
 }
 
+#if SQLITE_MAX_MMAP_SIZE>0
 /*
 ** Change the limit on the amount of the database file that may be
 ** memory mapped.
@@ -2173,6 +2174,7 @@ int sqlite3BtreeSetMmapLimit(Btree *p, sqlite3_int64 szMmap){
   sqlite3BtreeLeave(p);
   return SQLITE_OK;
 }
+#endif /* SQLITE_MAX_MMAP_SIZE>0 */
 
 /*
 ** Change the way data is synced to disk in order to increase or decrease
diff --git a/src/btree.h b/src/btree.h
index eda7bef70..0c3fdfad6 100644
--- a/src/btree.h
+++ b/src/btree.h
@@ -63,7 +63,9 @@ int sqlite3BtreeOpen(
 
 int sqlite3BtreeClose(Btree*);
 int sqlite3BtreeSetCacheSize(Btree*,int);
-int sqlite3BtreeSetMmapLimit(Btree*,sqlite3_int64);
+#if SQLITE_MAX_MMAP_SIZE>0
+  int sqlite3BtreeSetMmapLimit(Btree*,sqlite3_int64);
+#endif
 int sqlite3BtreeSetPagerFlags(Btree*,unsigned);
 int sqlite3BtreeSyncDisabled(Btree*);
 int sqlite3BtreeSetPageSize(Btree *p, int nPagesize, int nReserve, int eFix);