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有很多线程有类似的问题,但许多处理 c++ 代码并有 c++ 解决方案。但是,根据我在各个线程上收集的信息,当 gcc 尝试链接库时,我可能会丢失一个库。

我不知道我需要包含哪个库才能成功构建 JSON1。

对于加载 SQLite 扩展,他们在Mac上的官方说明是:

gcc -g -fPIC -dynamiclib YourCode.c -o YourCode.dylib

所以我做了:

$ gcc -g -fPIC -dynamiclib sqlite-src-3180000/ext/misc/json1.c -o json1

sqlite-src-3180000/ext/misc/json1.c:344:11: warning: implicit declaration of function
      'sqlite3_value_subtype' is invalid in C99 [-Wimplicit-function-declaration]
      if( sqlite3_value_subtype(pValue)==JSON_SUBTYPE ){
          ^
sqlite-src-3180000/ext/misc/json1.c:501:3: warning: implicit declaration of function
      'sqlite3_result_subtype' is invalid in C99 [-Wimplicit-function-declaration]
  sqlite3_result_subtype(pCtx, JSON_SUBTYPE);
  ^
2 warnings generated.
Undefined symbols for architecture x86_64:
  "_sqlite3_result_subtype", referenced from:
      _jsonArrayFunc in json1-5de683.o
      _jsonExtractFunc in json1-5de683.o
      _jsonObjectFunc in json1-5de683.o
      _jsonQuoteFunc in json1-5de683.o
      _jsonArrayFinal in json1-5de683.o
      _jsonObjectFinal in json1-5de683.o
      _jsonReturnJson in json1-5de683.o
      ...
  "_sqlite3_value_subtype", referenced from:
      _jsonAppendValue in json1-5de683.o
  "_sqlite3_vsnprintf", referenced from:
      _jsonPrintf in json1-5de683.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我错过了什么?

这是我的 gcc 详细信息,如果有帮助的话:

Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 7.3.0 (clang-703.0.31)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
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