在 QT 项目中使用 Crypto++ 静态库
Using Crypto++ static library in a QT project
I have built cryptopp statically on my system it passes all tests too. These are the warning though I get during tests
WARNING: CRYPTOPP_NO_UNALIGNED_DATA_ACCESS is not defined in config.h.
WARNING: CRYPTOPP_INIT_PRIORITY is not defined in config.h.
WARNING: CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY_562 is defined in config.h.
WARNING: You should make these changes in config.h, and not CXXFLAGS.
WARNING: You can 'mv config.recommend config.h', but it breaks versioning.
WARNING: See http://cryptopp.com/wiki/config.h for more details.
我现在 link 在我的 QT 项目文件中
TEMPLATE = app
LIBS += -L/usr/lib/libcryptopp.a
#LIBS += -lcryptopp
CONFIG += console c++11
CONFIG += staticlib
SOURCES += main.cpp \
hashdata.cpp
HEADERS += \
hashdata.hpp
但是当我编译这个时，我得到了所有未定义的错误。
hashdata.o: In function `hashdata::hashfunction(std::string)':
hashdata.cpp:(.text+0x1fb): undefined reference to `CryptoPP::Algorithm::Algorithm(bool)'
hashdata.cpp:(.text+0x270): undefined reference to `CryptoPP::SHA512::InitState(unsigned long long*)'
hashdata.cpp:(.text+0x29a): undefined reference to `CryptoPP::Algorithm::Algorithm(bool)'
hashdata.cpp:(.text+0x2a1): undefined reference to `vtable for CryptoPP::StringSinkTemplate<std::string>'
hashdata.cpp:(.text+0x30b): undefined reference to `CryptoPP::Filter::Filter(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x312): undefined reference to `vtable for CryptoPP::Grouper'
hashdata.cpp:(.text+0x35e): undefined reference to `CryptoPP::Filter::Detach(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x375): undefined reference to `CryptoPP::Filter::Filter(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x37c): undefined reference to `vtable for CryptoPP::BaseN_Encoder'
hashdata.cpp:(.text+0x3d3): undefined reference to `CryptoPP::Filter::Detach(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x3e5): undefined reference to `CryptoPP::ProxyFilter::ProxyFilter(CryptoPP::BufferedTransformation*, unsigned long, unsigned long, CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x3ec): undefined reference to `vtable for CryptoPP::HexEncoder'
hashdata.cpp:(.text+0x452): undefined reference to `vtable for CryptoPP::AlgorithmParametersTemplate<int>'
hashdata.cpp:(.text+0x4af): undefined reference to `vtable for CryptoPP::AlgorithmParametersTemplate<CryptoPP::ConstByteArrayParameter>'
...
之前在google搜索的时候也看到过类似的问题，但是解决方案不清楚。可能是因为 C++11 标志？
I have built cryptopp statically on my system it passes all tests too.
These are the warning though I get during tests
WARNING: CRYPTOPP_NO_UNALIGNED_DATA_ACCESS is not defined in config.h.
WARNING: CRYPTOPP_INIT_PRIORITY is not defined in config.h. WARNING:
CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY_562 is defined in config.h.
WARNING: You should make these changes in config.h, and not CXXFLAGS.
WARNING: You can 'mv config.recommend config.h', but it breaks
versioning. WARNING: See http://cryptopp.com/wiki/config.h for more
details.
我可以对此警告发表评论。您应该执行它所说的步骤：
mv config.recommend config.h
config.recommend 通过完全避免在不破坏版本控制的情况下 无法 删除的已知未定义行为，使库成为更好的配置。由于您似乎没有版本控制问题（例如 Fedora 或 Debian），因此您可以执行迁移。
I now link this in my QT project file as
TEMPLATE = app
LIBS += -L/usr/lib/libcryptopp.a
#LIBS += -lcryptopp
CONFIG += console c++11
...
构建 Crypto++ 时，您应该为库和应用程序使用相同的编译器和标志。我建议如下。
加密++:
# Be sure to 'mv config.recommend config.h'
export CXXFAGS="-DNDEBUG -g2 -O3 -std=c++11"
make static dynamic test
Qt App
# main.pro file
QMAKE_CXXFLAGS += -DNDEBUG -g2 -O3
另请参阅 Crypto++ wiki 上的 GNUmakefile | Building the Library。
hashdata.o: In function `hashdata::hashfunction(std::string)':
hashdata.cpp:(.text+0x1fb): undefined reference to `CryptoPP::Algorithm::Algorithm(bool)'
hashdata.cpp:(.text+0x270): undefined reference to `CryptoPP::SHA512::InitState(unsigned long long*)'
...
这些来自源 (*.cpp) 文件。我猜测（这纯粹是猜测）两个问题之一：
- C++03 与 C++11 导致缺少符号
- QT Creator 未使用
libcryptopp.a
使用nm检查符号。类似于以下内容（“ T ”在文本部分告诉您它的定义）：
$ nm libcryptopp.a 2>/dev/null | c++filt | \
grep 'Algorithm::Algorithm(bool)' | grep ' T '
0000000000000060 T CryptoPP::Algorithm::Algorithm(bool)
0000000000000070 T CryptoPP::Algorithm::Algorithm(bool)
如果 QT Creator 没有找到 Crypto++ 库，则可以看到类似 Adding external library into Qt Creator project.
的内容
来自评论:
-lcryptopp works, but I don't know why -L/usr/lib/libcryptopp.a doesn't. ... Because if a person had both static and dynamic libraries, I still don't know how to force linking static ones.
存档，如 libcryptopp.a，是目标文件的集合。您将其添加到 OBJECTS，而不是 LIBS，因此您 want something like:
# main.pro file
OBJECTS += /usr/lib/libcryptopp.a
您使用 -L 指定链接器的库路径。它对 -L/usr/lib/libcryptopp.a 没有多大意义，因为它用于路径。
Additional note is that when both the static and dynamic libs were present it was automatically linking the dynamic lib. Do you know how to force static linking ?
在 Linux 上，您可以通过 (1) -Bstatic -lcryptopp 强制静态链接；或 (2) 直接指定 /usr/lib/libcryptopp.a。加密++ test program uses method (2):
g++ main.cpp /usr/lib/libcryptopp.a -o main.exe
在 OS X 上，链接器总是链接到动态对象。它甚至在 iOS 上也是如此，其中通常不允许用户空间加载动态对象。为避免动态链接，(1) 移动或重命名 *.dylib；或 (2) 直接指定 /usr/lib/libcryptopp.a。加密++ test program uses method (2):
g++ main.cpp /usr/lib/libcryptopp.a -o main.exe
I have built cryptopp statically on my system it passes all tests too. These are the warning though I get during tests
WARNING: CRYPTOPP_NO_UNALIGNED_DATA_ACCESS is not defined in config.h.
WARNING: CRYPTOPP_INIT_PRIORITY is not defined in config.h.
WARNING: CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY_562 is defined in config.h.
WARNING: You should make these changes in config.h, and not CXXFLAGS.
WARNING: You can 'mv config.recommend config.h', but it breaks versioning.
WARNING: See http://cryptopp.com/wiki/config.h for more details.
我现在 link 在我的 QT 项目文件中
TEMPLATE = app
LIBS += -L/usr/lib/libcryptopp.a
#LIBS += -lcryptopp
CONFIG += console c++11
CONFIG += staticlib
SOURCES += main.cpp \
hashdata.cpp
HEADERS += \
hashdata.hpp
但是当我编译这个时，我得到了所有未定义的错误。
hashdata.o: In function `hashdata::hashfunction(std::string)':
hashdata.cpp:(.text+0x1fb): undefined reference to `CryptoPP::Algorithm::Algorithm(bool)'
hashdata.cpp:(.text+0x270): undefined reference to `CryptoPP::SHA512::InitState(unsigned long long*)'
hashdata.cpp:(.text+0x29a): undefined reference to `CryptoPP::Algorithm::Algorithm(bool)'
hashdata.cpp:(.text+0x2a1): undefined reference to `vtable for CryptoPP::StringSinkTemplate<std::string>'
hashdata.cpp:(.text+0x30b): undefined reference to `CryptoPP::Filter::Filter(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x312): undefined reference to `vtable for CryptoPP::Grouper'
hashdata.cpp:(.text+0x35e): undefined reference to `CryptoPP::Filter::Detach(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x375): undefined reference to `CryptoPP::Filter::Filter(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x37c): undefined reference to `vtable for CryptoPP::BaseN_Encoder'
hashdata.cpp:(.text+0x3d3): undefined reference to `CryptoPP::Filter::Detach(CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x3e5): undefined reference to `CryptoPP::ProxyFilter::ProxyFilter(CryptoPP::BufferedTransformation*, unsigned long, unsigned long, CryptoPP::BufferedTransformation*)'
hashdata.cpp:(.text+0x3ec): undefined reference to `vtable for CryptoPP::HexEncoder'
hashdata.cpp:(.text+0x452): undefined reference to `vtable for CryptoPP::AlgorithmParametersTemplate<int>'
hashdata.cpp:(.text+0x4af): undefined reference to `vtable for CryptoPP::AlgorithmParametersTemplate<CryptoPP::ConstByteArrayParameter>'
...
之前在google搜索的时候也看到过类似的问题，但是解决方案不清楚。可能是因为 C++11 标志？
I have built cryptopp statically on my system it passes all tests too. These are the warning though I get during tests
WARNING: CRYPTOPP_NO_UNALIGNED_DATA_ACCESS is not defined in config.h. WARNING: CRYPTOPP_INIT_PRIORITY is not defined in config.h. WARNING: CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY_562 is defined in config.h. WARNING: You should make these changes in config.h, and not CXXFLAGS. WARNING: You can 'mv config.recommend config.h', but it breaks versioning. WARNING: See http://cryptopp.com/wiki/config.h for more details.
我可以对此警告发表评论。您应该执行它所说的步骤：
mv config.recommend config.h
config.recommend 通过完全避免在不破坏版本控制的情况下 无法 删除的已知未定义行为，使库成为更好的配置。由于您似乎没有版本控制问题（例如 Fedora 或 Debian），因此您可以执行迁移。
I now link this in my QT project file as
TEMPLATE = app LIBS += -L/usr/lib/libcryptopp.a #LIBS += -lcryptopp CONFIG += console c++11 ...
构建 Crypto++ 时，您应该为库和应用程序使用相同的编译器和标志。我建议如下。
加密++:
# Be sure to 'mv config.recommend config.h'
export CXXFAGS="-DNDEBUG -g2 -O3 -std=c++11"
make static dynamic test
Qt App
# main.pro file
QMAKE_CXXFLAGS += -DNDEBUG -g2 -O3
另请参阅 Crypto++ wiki 上的 GNUmakefile | Building the Library。
hashdata.o: In function `hashdata::hashfunction(std::string)': hashdata.cpp:(.text+0x1fb): undefined reference to `CryptoPP::Algorithm::Algorithm(bool)' hashdata.cpp:(.text+0x270): undefined reference to `CryptoPP::SHA512::InitState(unsigned long long*)' ...
这些来自源 (*.cpp) 文件。我猜测（这纯粹是猜测）两个问题之一：
- C++03 与 C++11 导致缺少符号
- QT Creator 未使用
libcryptopp.a
使用nm检查符号。类似于以下内容（“ T ”在文本部分告诉您它的定义）：
$ nm libcryptopp.a 2>/dev/null | c++filt | \
grep 'Algorithm::Algorithm(bool)' | grep ' T '
0000000000000060 T CryptoPP::Algorithm::Algorithm(bool)
0000000000000070 T CryptoPP::Algorithm::Algorithm(bool)
如果 QT Creator 没有找到 Crypto++ 库，则可以看到类似 Adding external library into Qt Creator project.
的内容来自评论:
-lcryptoppworks, but I don't know why-L/usr/lib/libcryptopp.adoesn't. ... Because if a person had both static and dynamic libraries, I still don't know how to force linking static ones.
存档，如 libcryptopp.a，是目标文件的集合。您将其添加到 OBJECTS，而不是 LIBS，因此您 want something like:
# main.pro file
OBJECTS += /usr/lib/libcryptopp.a
您使用 -L 指定链接器的库路径。它对 -L/usr/lib/libcryptopp.a 没有多大意义，因为它用于路径。
Additional note is that when both the static and dynamic libs were present it was automatically linking the dynamic lib. Do you know how to force static linking ?
在 Linux 上，您可以通过 (1) -Bstatic -lcryptopp 强制静态链接；或 (2) 直接指定 /usr/lib/libcryptopp.a。加密++ test program uses method (2):
g++ main.cpp /usr/lib/libcryptopp.a -o main.exe
在 OS X 上，链接器总是链接到动态对象。它甚至在 iOS 上也是如此，其中通常不允许用户空间加载动态对象。为避免动态链接，(1) 移动或重命名 *.dylib；或 (2) 直接指定 /usr/lib/libcryptopp.a。加密++ test program uses method (2):
g++ main.cpp /usr/lib/libcryptopp.a -o main.exe