./configure --prefix=/c/data/bin/ --disable-tcl --disable-amalgamation --enable-load-extension CFLAGS="-DENABLE_COLUMN_METADATA -DENABLE_FTS3 -DENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_ICU -DSQLITE_ENABLE_FTS4 -DSQLITE_TEMP_STORE=2 -DSQLITE_MAX_ATTACHED=62 -DSQLITE_ENABLE_LOAD_EXTENSION  -I./ext/fts3 -I./ext/icu -L/c/data/bin/lib -I/c/data/bin/include" LDFLAGS="-licuuc -licuin -licudt"
make && make install
gcc -shared icu.c -o icu.dll -I./ext/fts3 -I./ext/icu -L/c/data/bin/lib /c/data/bin/include -licuuc -licuin -I../../src -I../../

./configure --prefix=/c/data/bin/ --enable-static
make && make install

sqlite> .load icu.dll
sqlite> pragma encoding;
UTF-8
sqlite> select icu_load_collation('ru_RU', 'RUSSIAN');

sqlite> CREATE TABLE text1(name TEXT);
sqlite> insert into text1 values ('ТЕКСТ');
sqlite> select lower(name) from text1;
┬Т┬Е┬К┬С┬Т
sqlite> select name from text1;
ТЕКСТ
sqlite> SELECT 'текст';
текст
sqlite> SELECT lower('текст');
текя┐╜я┐╜
sqlite> select 'ы' LIKE 'Ы';
0
sqlite>