GCC 11 picks up an indentation problem as a warning, and so -Werror fails the build.  This doesn't change the software from functioning but anything that causes a build with default options to fail is going to exclude it from software packaging systems.

```
$ make
gcc -g -I. -D_FILE_OFFSET_BITS=64 -Wall -Werror   -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION -c sqlite3.c
sqlite3.c: In function ‘sqlite3DefaultRowEst’:
sqlite3.c:103150:3: error: this ‘if’ clause does not guard... [-Werror=misleading-indentation]
103150 |   if( pIdx->pPartIdxWhere!=0 ) a[0] -= 10;  assert( 10==sqlite3LogEst(2) );
       |   ^~
In file included from sqlite3.c:11616:
sqlite3.c:103150:45: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
103150 |   if( pIdx->pPartIdxWhere!=0 ) a[0] -= 10;  assert( 10==sqlite3LogEst(2) );
       |                                             ^~~~~~
sqlite3.c:103151:3: error: this ‘if’ clause does not guard... [-Werror=misleading-indentation]
103151 |   if( a[0]<33 ) a[0] = 33;                  assert( 33==sqlite3LogEst(10) );
       |   ^~
In file included from sqlite3.c:11616:
sqlite3.c:103151:45: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
103151 |   if( a[0]<33 ) a[0] = 33;                  assert( 33==sqlite3LogEst(10) );
       |                                             ^~~~~~
cc1: all warnings being treated as errors
make: *** [Makefile:21: sqlite3.o] Error 1
$ gcc --version
gcc (GCC) 11.2.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$
```