Question

我有一个名为main.cpp的文件，我使用的是具有完整路径的共享库：＆＃34; /usr/local/lib/libcryptopp.a＆＃34;我的include目录是：＆＃34; /usr/local/include/cryptopp＆＃34;。

当我尝试使用此命令构建时：

g++ -o crypto -g main.cpp -I /usr/local/include/cryptopp /usr/local/lib/libcryptopp.a

代码构建完美，可执行文件＆＃34;加密＆＃34;被建造。但是当我将编译和链接分开时：

g++ -c -g -I/usr/local/include/cryptopp -o main.o main.cpp
g++ -o crypto main.o -L/usr/lib64 /usr/local/lib/libcryptopp.a

我收到这些错误：

/usr/local/lib/libcryptopp.a(algparam.o): In function `CryptoPP::CombinedNameValuePairs::~CombinedNameValuePairs()':
/home/stsadm/JJ/algparam.h:135: undefined reference to `operator delete(void*, unsigned long)'
/usr/local/lib/libcryptopp.a(pubkey.o): In function `CryptoPP::P1363_MGF1KDF2_Common(CryptoPP::HashTransformation&, unsigned char*, unsigned long, unsigned char const*, unsigned long, unsigned char const*, unsigned long, bool, unsigned int)':
/home/stsadm/JJ/pubkey.cpp:17: undefined reference to `operator delete(void*, unsigned long)'
/usr/local/lib/libcryptopp.a(pubkey.o): In function `CryptoPP::PK_SignatureScheme::InvalidKeyLength::~InvalidKeyLength()':
/home/stsadm/JJ/cryptlib.h:2459: undefined reference to `operator delete(void*, unsigned long)'
/usr/local/lib/libcryptopp.a(pubkey.o): In function `CryptoPP::PK_SignatureScheme::KeyTooShort::~KeyTooShort()':
/home/stsadm/JJ/cryptlib.h:2469: undefined reference to `operator delete(void*, unsigned long)'
/usr/local/lib/libcryptopp.a(pubkey.o): In function `CryptoPP::HashFilter::~HashFilter()':
/home/stsadm/JJ/filters.h:517: undefined reference to `operator delete(void*, unsigned long)'

我让分离的方式无关紧要。任何想法为什么分离版本给我链接错误？

Answer 1

为什么包含额外的（尽管是不必要的）库目录导致问题的任何想法？

我能看到的唯一原因是，libstdc++.a，{em>和中的libstdc++.so或/usr/lib64该库在某种程度上已损坏，或者只是丢失了::operator delete出于某种（意外）原因。

要查看“常规”链接选择了哪个（非损坏的）libstdc++，请执行以下操作：

g++ -o crypto main.o /usr/local/lib/libcryptopp.a -Wl,-y,_ZdlPvm

当我分离编译和链接时，代码不会构建

1 个答案: