CMake链接失败

Question

我正在为CMake配置我的项目，并且有链接问题 - 项目文件全部编译成功，然后它说它正在链接并报告找不到的各种符号。

这些符号大部分由我自己的代码提供，而其中一些代码由BerkeleyDB提供，它们的位置和位置正确。

这里是我的顶层的CMakeLists.txt：

cmake_minimum_required(VERSION 2.6) 

project(rpdb C) 

# add local modules path for project 
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/") 

# where to look for source files (headers and source) 
include_directories(include src) 

# define sub-directories of source that cmake knows about as well a where their output will be put 
add_subdirectory(src bin) 

# compiler-dependent flags: 
if(CMAKE_COMPILER_IS_GNUCC) 
    # gcc 
    add_definitions(-ggdb -fsigned-char -freg-struct-return -Wall -W -Wshadow -Wstrict-prototypes -Wpointer-arith -Wcast-qual -Winline -Werror) 
else(CMAKE_COMPILER_IS_GNUCC) 
    # non-gcc (intended for clang) 
    add_definitions(-ggdb -fsigned-char -Wall -W -Wshadow -Wstrict-prototypes -Wpointer-arith -Wcast-qual -Winline -Werror) 
endif(CMAKE_COMPILER_IS_GNUCC) 


# distribution configuration 
set(CMAKE_C_FLAGS_DISTRIBUTION "-O3") 
set(CMAKE_CXX_FLAGS_DISTRIBUTION "-O3") 

这里是我的SRC级的CMakeLists.txt：

# make sure we have libdb 
find_package(BerkeleyDB REQUIRED) 
include_directories(${libdb_INCLUDE_DIRS}) 
target_link_libraries(rpdb ${libdb_LIBRARIES}) 

# define variable specifying included source files - all .c files below this directory 
file(GLOB rpdb_src "**/*.c") 

# define shared library with sources 
add_library(rpdb SHARED ${rpdb_src}) 

输出（部分）：

... 
[100%] Building C object bin/CMakeFiles/rpdb.dir/RPDB_TransactionController/RPDB_TransactionController.c.o 
Linking C shared library librpdb.dylib 
Undefined symbols: 
    "_RPDB_ReplicationVerbositySettingsController_displayMessageProcessingInformation", referenced from: 
     _RPDB_SettingsController_internal_setVerbosity in RPDB_SettingsController.c.o 
... 

所有符号确实存在。结果似乎发生在目标文件以外的目标文件中的符号上。

从输出 “的cmake ../”（从安装，在顶级目录）：

=> cmake .. 
-- Found BerkeleyDB: /usr/local/lib/libdb.dylib 
-- Configuring done 
-- Generating done 
-- Build files have been written to: /Users/ahaig/Projects/RPDB/RPDB_C/install 

任何帮助非常赞赏。

Answer 1

相反的GLOB，尝试GLOB_RECURSE（CMake 2.8.3 docs, file command），您可以使用这样的：file (GLOB_RECURSE rpdb_src "*.c")

一个例子：

function (add_test_files) 
    set (src_files "") 

    #################################################### 
    # Find all C/C++ files recursively from current dir 
    #################################################### 
    foreach (ext IN ITEMS "cpp" "cxx" "cc" "c") 
     file (GLOB_RECURSE _files "*.${ext}") 
     set (src_files ${src_files} ${_files}) 
    endforeach() 

    message (STATUS "Found: ${src_files}") 

    add_executable (test ${src_files}) 
endfunction() 

add_test_files() 

Answer 2

使VERBOSE = 1

而且，看CMakeCache.txt

Answer 3

我的问题归结为与文件包含的问题。我使用**/*。c通过glob来包含文件，这显然被当作*/*。c来处理。也许我在这里误解了全局模式 - 我只是最低限度地使用它们，否则在Ruby的文件通配中。

在任何情况下，这里是我想出了解决方案：

# function processes each sub-directory and then adds each source file in directory 
# each function should cascade back upward in setting variables so that the bottom directory 
# adds its source first, and then the level above it adds its source and passes both up, and so on... 
function(recursively_include_source which_directory) 

    # get list of source from this directory 
    file(GLOB this_directory_src "${which_directory}/*.c") 

    # get list of all files for this directory 
    file(GLOB this_directory_all_files "${which_directory}/*") 

    if(this_directory_all_files AND this_directory_src) 

     # remove source from list of files to get list of directories 
     list(REMOVE_ITEM this_directory_all_files ${this_directory_src}) 
     set(this_directory_directories ${this_directory_all_files}) 

     # for each sub-directory, call self with sub-directory as arg 
     foreach(this_sub_directory ${this_directory_directories}) 
      recursively_include_source(${this_sub_directory}) 
     endforeach(this_sub_directory ${this_directory_directories}) 

    endif(this_directory_all_files AND this_directory_src) 

    # add source files to ${rpdb_src} in PARENT_SCOPE 
    set(rpdb_src ${rpdb_src} ${this_directory_src} PARENT_SCOPE) 

endfunction(recursively_include_source which_directory) 

这包括和当前目录下的所有.c文件。

我调用该函数是这样的：

recursively_include_source(${CMAKE_CURRENT_SOURCE_DIR}) 

所以最终的SRC-DIR的CMakeLists.txt看起来是这样的：

# make sure we have libdb 
find_package(BerkeleyDB REQUIRED) 
include_directories(${DB_INCLUDE_DIRS}) 
set(LIBS ${LIBS} ${DB_LIBRARIES}) 

recursively_include_source(${CMAKE_CURRENT_SOURCE_DIR}) 

# define shared library with sources 
add_library(rpdb SHARED ${rpdb_src}) 
target_link_libraries(rpdb ${LIBS}) 

，一切似乎是工作。