Linux makefile 中未定义的引用
我想在 Linux 下构建我的应用程序，但我无法让我的 makefile 来制作它。
问题是我想要链接的静态库。我收到很多“未定义的引用”错误消息，例如：
undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()'
或
undefined reference to `cgicc::Cgicc::Cgicc(cgicc::CgiInput*)'
这是我的 makefile：
CXX = gcc
INCL_CGICC = ../cgicc-3.2.9
INCL_OPENSSL = ../openssl-1.0.0e/include
INCL_LOG4CPLUS = ../log4cplus-1.0.4/include
INCL_BOOST = ../boost_1_46_1
INCLUDES = -I$(INCL_CGICC) -I$(INCL_OPENSSL) -I$(INCL_LOG4CPLUS) -I$(INCL_BOOST)
CXXFLAGS = -Wall -D_LINUX -DVERSNUM=2 -DVERSMAJOR=0 -DVERSMINOR=0 $(INCLUDES)
TARGET = myapp
OBJS = Main.o
all: $(TARGET)
strip -s $<
mv -f $< release
$(TARGET): $(OBJS)
$(CXX) -static -o $@ $(OBJS) \
../cgicc-3.2.9/cgicc/.libs/libcgicc.a \
../openssl-1.0.0e/libssl.a \
../openssl-1.0.0e/libcrypto.a \
../log4cplus-1.0.4/src/.libs/liblog4cplus.a \
-ldl -lpthread
%.o: %.cpp
$(CXX) $(CXXFLAGS) -c $<
问题是我不知道 makefile。我只是复制了一个现有的并尝试对其进行调整。似乎不起作用，而且我找不到包含静态库的示例 makefile。
I want to build my application under linux but i can't get my makefile to make it.
the problems are the static libraries I wan to link with. I get a lot of "undefined reference to" error messages like:
undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()'
or
undefined reference to `cgicc::Cgicc::Cgicc(cgicc::CgiInput*)'
Here is my makefile:
CXX = gcc
INCL_CGICC = ../cgicc-3.2.9
INCL_OPENSSL = ../openssl-1.0.0e/include
INCL_LOG4CPLUS = ../log4cplus-1.0.4/include
INCL_BOOST = ../boost_1_46_1
INCLUDES = -I$(INCL_CGICC) -I$(INCL_OPENSSL) -I$(INCL_LOG4CPLUS) -I$(INCL_BOOST)
CXXFLAGS = -Wall -D_LINUX -DVERSNUM=2 -DVERSMAJOR=0 -DVERSMINOR=0 $(INCLUDES)
TARGET = myapp
OBJS = Main.o
all: $(TARGET)
strip -s lt;
mv -f lt; release
$(TARGET): $(OBJS)
$(CXX) -static -o $@ $(OBJS) \
../cgicc-3.2.9/cgicc/.libs/libcgicc.a \
../openssl-1.0.0e/libssl.a \
../openssl-1.0.0e/libcrypto.a \
../log4cplus-1.0.4/src/.libs/liblog4cplus.a \
-ldl -lpthread
%.o: %.cpp
$(CXX) $(CXXFLAGS) -c lt;
The problem is that I have no idea of makefiles. I just copied an existing one and tried to adjust it. Didn't seem to work, and I can't find an example makefile that includes static libraries.
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CXX = gcc您正在链接
gcc，而不是g++，因此-lstdc++不会被链接到默认。请注意，使用 gcc 编译 C++ 源代码效果很好，因为在这种情况下会隐式调用 g++。
CXX = gccYou're linking with
gcc, rather thang++, so-lstdc++is not linked in by default.Note that using
gccto compile C++ sources work just fine, sinceg++is called implicitly in that case.如果您对编写 Makefile 毫无头绪，也许您应该看看一些 Makefile 生成器，例如 autotools、cmake 等。在我看来，这些生成器更容易使用，而且一旦您掌握了它们的使用，它们的功能就会强大得多。
If you have no clue about writing Makefiles, perhaps you should have a look at some of the Makefile generators, e.g. autotools, cmake etc. These are much easier to use in my opinion, and, once you master their use, much more powerful.