具有相同库依赖的两个模块无法编译

Question

我正在开发一个 CocoaPod，它依赖于我也编写的另外两个 pod。假设 Pod1、Pod2 和 Pod3。 Pod2 和 Pod3 在他们的 podspecs 中有这个：

...
s.libraries 'sqlite3'
...

...这是因为它们都使用依赖于 sqlite 的不同静态库。该行在各自的 cocoapod 编译中将 sqlite3 添加为链接库（构建阶段上的“链接框架和库”）。 然后，Pod1 将这两个 pod 作为依赖项：

...
s.dependency 'Pod2'
s.dependency 'Pod3'
...

当我尝试编译 Pod1 时，抛出此错误：

Undefined symbols for architecture x86_64:
  "_sqlite3_open", referenced from:
      DatabaseConnection::open() in libSecurIDLib.a(databaseconnection.o)
  "_sqlite3_bind_int", referenced from:
      AbstractStatement::bindValue(sqlite3_stmt*, DataValue const&, int) in libSecurIDLib.a(abstractstatement.o)
  "_sqlite3_bind_double", referenced from:
      AbstractStatement::bindValue(sqlite3_stmt*, DataValue const&, int) in libSecurIDLib.a(abstractstatement.o)
  "_sqlite3_bind_text", referenced from:
      AbstractStatement::bindValue(sqlite3_stmt*, DataValue const&, int) in libSecurIDLib.a(abstractstatement.o)
  "_sqlite3_bind_blob", referenced from:
      AbstractStatement::bindValue(sqlite3_stmt*, DataValue const&, int) in libSecurIDLib.a(abstractstatement.o)
  "_sqlite3_column_double", referenced from:
      AbstractStatement::parseRow(sqlite3_stmt*) in libSecurIDLib.a(abstractstatement.o)
  "_sqlite3_bind_null", referenced from:
      AbstractStatement::bindValue(sqlite3_stmt*, DataValue const&, int) in libSecurIDLib.a(abstractstatement.o)
  "_sqlite3_column_bytes", referenced from:
      AbstractStatement::parseRow(sqlite3_stmt*) in libSecurIDLib.a(abstractstatement.o)
  "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::reserve(unsigned long)", referenced from:
      KeyValueMapper::extractValue(boost::shared_ptr<KeyValuePair>) in libSecurIDLib.a(keyvaluemapper.o)
  "_sqlite3_exec", referenced from:
      CreateTableStatement::execute(DatabaseConnection*) in libSecurIDLib.a(createtablestatement.o)
      EndTransactionStatement::execute(DatabaseConnection*) in libSecurIDLib.a(endtransactionstatement.o)
      BeginTransactionStatement::execute(DatabaseConnection*) in libSecurIDLib.a(begintransactionstatement.o)
  "_sqlite3_finalize", referenced from:
      AbstractStatement::takeStepsAndFinalize(sqlite3_stmt*) in libSecurIDLib.a(abstractstatement.o)
  "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::append(char const*)", referenced from:
      TokenMapper::convertDate(CK_DATE const&) in libSecurIDLib.a(tokenmapper.o)
      SqlStrings::generateInsertStatement(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned int) in libSecurIDLib.a(sqlstrings.o)
      SqlStrings::generateCreateTableStatement(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, boost::shared_ptr<std::__1::vector<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, DataValue::SQL_DATATYPE>, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, DataValue::SQL_DATATYPE> > > >) in libSecurIDLib.a(sqlstrings.o)
      SqlStrings::generateDeleteStatement(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libSecurIDLib.a(sqlstrings.o)
      SqlStrings::generateSelectStatement(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libSecurIDLib.a(sqlstrings.o)
      SqlStrings::generateUpdateStatement(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, boost::shared_ptr<std::__1::vector<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, DataValue>, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, DataValue> > > >) in libSecurIDLib.a(sqlstrings.o)
  "vtable for __cxxabiv1::__vmi_class_type_info", referenced from:
      typeinfo for RSA::Crypto::BSAFE_Recode in libSecurIDLib.a(BSAFE_Recode.o)
      typeinfo for RSA::Crypto::BSAFE_SecretKey in libSecurIDLib.a(BSAFE_CryptoKey.o)
      typeinfo for RSA::Crypto::BSAFE_PublicKey in libSecurIDLib.a(BSAFE_CryptoKey.o)
      typeinfo for RSA::Crypto::BSAFE_PrivateKey in libSecurIDLib.a(BSAFE_CryptoKey.o)
      typeinfo for RSA::Crypto::BSAFE_CryptoHash in libSecurIDLib.a(BSAFE_CryptoHash.o)
      typeinfo for RSA::Crypto::BSAFE_SymmetricCipher in libSecurIDLib.a(BSAFE_SymmetricCipher.o)

由于字数限制，还有一些不适合此处的错误，然后以：

      ...
  "_xmlSchemaCleanupTypes", referenced from:
      -[yqKtL17 validateTdpUsingXsd:] in libSecurIDLib.a(TdpProcessor.o)
  "___cxa_guard_release", referenced from:
      SecLibMesState::instance() in libSecurIDLib.a(SecLibMesState.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我有哪些选择？我尝试在一个单独的共享 pod 中 publish sqlite3，但两个库都没有接受它

Answer 1

确保 podspec 将 sqlite3 指定为系统库依赖项：

s.library = 'sqlite3'