是否可以使用 clang 在 Apple Silicon 上构建 sqlite 扩展？

Question

我正在尝试使用页面上的说明在 M1 笔记本电脑上构建 percentile sqlite 扩展：

gcc -g -fPIC -shared percentile.c -o percentile.so

但是，这会导致以下错误：

clang

是否可以使用 clang 构建 sqlite 扩展，或者我是否需要获得真正的 GCC 才能完成这项工作？

Answer 1

$ gcc -g -fPIC -shared percentile.c -o percentile.so
Undefined symbols for architecture arm64:
  "_sqlite3_aggregate_context", referenced from:
      _percentStep in percentile-a11598.o
      _percentFinal in percentile-a11598.o
  "_sqlite3_create_function", referenced from:
      _sqlite3_percentile_init in percentile-a11598.o
      _sqlite3_percentile_init in percentile-a11598.o
      _sqlite3_percentile_init in percentile-a11598.o
  "_sqlite3_free", referenced from:
      _percentStep in percentile-a11598.o
      _percentFinal in percentile-a11598.o
  "_sqlite3_realloc64", referenced from:
      _percentStep in percentile-a11598.o
  "_sqlite3_result_double", referenced from:
      _percentFinal in percentile-a11598.o
  "_sqlite3_result_error", referenced from:
      _percentStep in percentile-a11598.o
      _percentStep in percentile-a11598.o
      _percentStep in percentile-a11598.o
      _percentStep in percentile-a11598.o
      _percentStep in percentile-a11598.o
  "_sqlite3_result_error_nomem", referenced from:
      _percentStep in percentile-a11598.o
  "_sqlite3_user_data", referenced from:
      _percentStep in percentile-a11598.o
  "_sqlite3_value_double", referenced from:
      _percentStep in percentile-a11598.o
      _percentStep in percentile-a11598.o
      _percentStep in percentile-a11598.o
  "_sqlite3_value_numeric_type", referenced from:
      _percentStep in percentile-a11598.o
      _percentStep in percentile-a11598.o
  "_sqlite3_value_type", referenced from:
      _percentStep in percentile-a11598.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

结尾：

.dylib

尽管它确实会产生警告

gcc -g -fPIC -dynamiclib -undefined suppress percentile.c -o percentile.dylib

，但比我聪明的人（有很多）可能能够提供帮助。

但是，当您尝试加载它时，如果您在

ld: warning: -undefined suppress is deprecated

中使用Apple提供的

sqlite3

命令，则会失败。您可以通过运行来判断您正在使用哪一个：/usr/bin/sqlite3

当您尝试加载它时，您会得到：

type sqlite3
sqlite3 is /usr/bin/sqlite3

如果您随后检查Apple如何编译

sqlite> .load percentile
Error: unknown command or invalid arguments:  "load". Enter ".help" for help

：

sqlite3

输出

sqlite3 :memory: 'select * from pragma_compile_options()'

您可以看到Apple不允许使用

ATOMIC_INTRINSICS=1
BUG_COMPATIBLE_20160819
CCCRYPT256
COMPILER=clang-15.0.0
DEFAULT_AUTOVACUUM
DEFAULT_CACHE_SIZE=2000
DEFAULT_CKPTFULLFSYNC
DEFAULT_FILE_FORMAT=4
DEFAULT_JOURNAL_SIZE_LIMIT=32768
DEFAULT_LOOKASIDE=1200,102
DEFAULT_MEMSTATUS=0
DEFAULT_MMAP_SIZE=0
DEFAULT_PAGE_SIZE=4096
DEFAULT_PCACHE_INITSZ=20
DEFAULT_RECURSIVE_TRIGGERS
DEFAULT_SECTOR_SIZE=4096
DEFAULT_SYNCHRONOUS=2
DEFAULT_WAL_AUTOCHECKPOINT=1000
DEFAULT_WAL_SYNCHRONOUS=1
DEFAULT_WORKER_THREADS=0
DQS=3
ENABLE_API_ARMOR
ENABLE_BYTECODE_VTAB
ENABLE_COLUMN_METADATA
ENABLE_DBPAGE_VTAB
ENABLE_DBSTAT_VTAB
ENABLE_EXPLAIN_COMMENTS
ENABLE_FTS3
ENABLE_FTS3_PARENTHESIS
ENABLE_FTS3_TOKENIZER
ENABLE_FTS4
ENABLE_FTS5
ENABLE_LOCKING_STYLE=1
ENABLE_MATH_FUNCTIONS
ENABLE_NORMALIZE
ENABLE_PREUPDATE_HOOK
ENABLE_RTREE
ENABLE_SESSION
ENABLE_SNAPSHOT
ENABLE_SQLLOG
ENABLE_STMT_SCANSTATUS
ENABLE_UNKNOWN_SQL_FUNCTION
ENABLE_UPDATE_DELETE_LIMIT
HAS_CODEC_RESTRICTED
HAVE_ISNAN
MALLOC_SOFT_LIMIT=1024
MAX_ATTACHED=10
MAX_COLUMN=2000
MAX_COMPOUND_SELECT=500
MAX_DEFAULT_PAGE_SIZE=8192
MAX_EXPR_DEPTH=1000
MAX_FUNCTION_ARG=127
MAX_LENGTH=2147483645
MAX_LIKE_PATTERN_LENGTH=50000
MAX_MMAP_SIZE=1073741824
MAX_PAGE_COUNT=1073741823
MAX_PAGE_SIZE=65536
MAX_SQL_LENGTH=1000000000
MAX_TRIGGER_DEPTH=1000
MAX_VARIABLE_NUMBER=500000
MAX_VDBE_OP=250000000
MAX_WORKER_THREADS=8
MUTEX_UNFAIR
OMIT_AUTORESET
OMIT_LOAD_EXTENSION                  <--- OOPS, ".load" not built in
STMTJRNL_SPILL=131072
SYSTEM_MALLOC
TEMP_STORE=1
THREADSAFE=2
USE_URI

命令。因此，您需要自己构建整个

/.load

，或者使用

homebrew

安装其可执行文件： sqlite3

然后你可以运行：

brew install sqlite

您将看到支持

/opt/homebrew/Cellar/sqlite/3.46.0/bin/sqlite3 :memory: 'select * from pragma_compile_options()'

命令。现在你可以做：

.load