aws-sdk-cpp:未解决的符号 [英] aws-sdk-cpp: unresolved symbols
问题描述
我想用aws sdk cpp构建一个简单的例子。但我无意中遇到了一个建设步骤。我正在链接libaws-cpp-sdk-s3.so库,它应该包含源文件中的所有符号。但是链接器甚至找不到其中的几个。源文件是:
#include< aws / core / Aws.h>
int main(int argc,char ** argv)
{
Aws :: SDKOptions选项;
Aws :: InitAPI(options);
{
//在这里进行SDK调用。
}
Aws :: ShutdownAPI(options);
返回0;
}
通过使用这个Makefile:
CC = g ++
CFLAGS = -g -c -Wall -std = c ++ 11
LDFLAGS = -g
EXECUTABLE = ex1
RM = rm -f
SOURCES = main.cpp
OBJS = $(SOURCES:.cpp = .o)
全部:$($ EXECUTABLE)
$(EXECUTABLE):main.o -laws-cpp-sdk-s3
$(CC)$(LDFLAGS)main.o -o $ @
main.o:main.cpp
$(CC)$(CFLAGS)$ ^ -o $ @
.PHONY:clean
clean:
$(RM)$(EXECUTABLE)$(OBJS)$(SOURCES:.cpp = .d)
当我运行make时,出现此错误。但为什么?我建立了
g ++ -g main.o -o ex1
main.o:在函数 main'中:
Aws :: InitAPI(Aws :: SDKOptions const&)'
/ home / username / workspace / ex1 / src / main.cpp:6:未定义的引用
/ home / username / workspace / ex1 / src / main.cpp:12:未定义引用到`Aws :: ShutdownAPI(Aws :: SDKOptions const&)'
collect2:错误:ld返回1退出状态
Makefile:13:recipe for target'ex1'failed
make:*** [ex1] Error 1
您正在链接libaws-cpp-sdk-core
您可能需要:
$(EXECUTABLE):main.o -laws-cpp-sdk-s3 -laws-cpp-sdk-core
$(CC)$(LDFLAGS)main.o -o $ @
I am trying to build a simple example using aws sdk cpp. But I am stumbled on a building step. I am linking libaws-cpp-sdk-s3.so library, which is supposed to have all symbols from the source file. But the linker cannot even find a couple of them. The source file is:
#include <aws/core/Aws.h>
int main( int argc, char ** argv)
{
Aws::SDKOptions options;
Aws::InitAPI(options);
{
// make your SDK calls here.
}
Aws::ShutdownAPI(options);
return 0;
}
by using this Makefile:
CC = g++
CFLAGS = -g -c -Wall -std=c++11
LDFLAGS = -g
EXECUTABLE = ex1
RM = rm -f
SOURCES = main.cpp
OBJS = $(SOURCES:.cpp=.o)
all: $(EXECUTABLE)
$(EXECUTABLE): main.o -laws-cpp-sdk-s3
$(CC) $(LDFLAGS) main.o -o $@
main.o: main.cpp
$(CC) $(CFLAGS) $^ -o $@
.PHONY: clean
clean:
$(RM) $(EXECUTABLE) $(OBJS) $(SOURCES:.cpp=.d)
When I run make, I got this error. But why? I built
g++ -g main.o -o ex1
main.o: In function main':
/home/username/workspace/ex1/src/main.cpp:6: undefined reference to
Aws::InitAPI(Aws::SDKOptions const&)'
/home/username/workspace/ex1/src/main.cpp:12: undefined reference to `Aws::ShutdownAPI(Aws::SDKOptions const&)'
collect2: error: ld returned 1 exit status
Makefile:13: recipe for target 'ex1' failed
make: *** [ex1] Error 1
I don't see where you are linking libaws-cpp-sdk-core
You probably need:
$(EXECUTABLE): main.o -laws-cpp-sdk-s3 -laws-cpp-sdk-core
$(CC) $(LDFLAGS) main.o -o $@
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