我有以下目錄結構:CMake的:未定義的參考功能
├── build (empty dir)
├── CMakeLists.txt
├── easylogging++.h
├── help.h
├── operation.h
├── operation_list.h
├── operations
│ ├── CMakeLists.txt
│ ├── matchcount.cc
│ └── matchcount.h
└── ops_toolkit.cc
而且我是新來的CMake,並努力寫出的CMakeLists.txt。 我的matchcount.h有一個簽名,其實現在matchcount.cc中(如典型的C/C++結構)。 以下是我的基本目錄
cmake_minimum_required(VERSION 2.6)
project(ops_toolkit)
add_subdirectory(operations)
add_executable(ops_toolkit ops_toolkit.cc)
set(CMAKE_CXX_FLAGS "-std=c++0x")
和下面的CMakeLists.txt是
include_directories(${ops_toolkit_SOURCE_DIR}/operations)
link_directories(${ops_toolkit_BINARY_DIR}/operations)
set(all_operations_HEADER operations/matchcount.h)
set(all_operations_SOURCES operations/matchcount.cc)
我得到了函數簽名未定義引用一個在操作目錄下名爲int matchcount(int, const char**)
,並笙歌以下
dev:~/work/ops_toolkit/build$ make
Scanning dependencies of target ops_toolkit
[100%] Building CXX object CMakeFiles/ops_toolkit.dir/ops_toolkit.cc.o
Linking CXX executable ops_toolkit
CMakeFiles/ops_toolkit.dir/ops_toolkit.cc.o: In function `__static_initialization_and_destruction_0(int, int)':
ops_toolkit.cc:(.text+0x249): undefined reference to `operations::matchcount(int, char const**)'
collect2: ld returned 1 exit status
make[2]: *** [ops_toolkit] Error 1
make[1]: *** [CMakeFiles/ops_toolkit.dir/all] Error 2
make: *** [all] Error 2
有人可以幫助我嗎? 感謝
你是否實現了operations :: matchcount(int,char const **)? –
@LuchianGrigore還有一件事,我沒有聲明或定義這個簽名,我有operations :: matchcount(int,const char **)。是的,我已經在matchcount.cc – abumusamq
執行它'char const **'與'const char **'相同。是matchcount一個項目? – Synxis