CMake第三方库未定义引用

我已经阅读和搜索了很多(例如1 2 3，几个CMake的文档，类似的项目，等等)来寻找解决方案，但我一直无法解决我的问题。我对CMake和Linux(Ubuntu 14.04)相对较新。

我想使用libsbp(https://github.com/swift-nav/libsbp)用C++编写程序与GPS模块进行通信。我克隆了存储库并安装了C-Library。因此，现在在/usr/local/lib中有两个文件：libsbp.So和libsbp-static.a，头文件在/usr/local/include/libsbp中

在我自己的项目中，我使用#include "libsbp/sbp.h"包含了头，它也可以工作。

现在的问题是：如果我想使用libsbp中的方法，例如sbp_state_init(&s);，我会得到对"sbp_state_init(sbp_state_t*)"的未定义引用

我自己项目的Cmake的相关部分：

link_directories(/usr/local/lib)
add_executable(main ${QT_SOURCES} ${QT_HEADER_HPP})
target_link_libraries(main ${QT_LIBRARIES} ${catkin_LIBRARIES} sbp)

正如我之前所说，我尝试了一些东西：

• find_library(SBP_LIB sbp /usr/local/lib)->相同错误
• 在target_link_libraries中使用libsbp或搜索它也是如此
• link_directory(/usr/local/lib)
• 尝试不同的路径，甚至将libsbp.so移动到项目目录中，并使用${CMAKE_CURRENT_SOURCE_DIR}"查找"它

也许你能帮我！

编辑：

这是libsbp/c/src目录中的CMakeList.txt

if (NOT DEFINED BUILD_SHARED_LIBS)
set(BUILD_SHARED_LIBS ON)
endif (NOT DEFINED BUILD_SHARED_LIBS)
file(GLOB libsbp_HEADERS "${PROJECT_SOURCE_DIR}/include/libsbp/*.h")
include_directories("${PROJECT_SOURCE_DIR}/CBLAS/include")
include_directories("${PROJECT_SOURCE_DIR}/clapack-3.2.1-CMAKE/INCLUDE")
include_directories("${PROJECT_SOURCE_DIR}/lapacke/include")
include_directories("${PROJECT_SOURCE_DIR}/include/libsbp")
set(libsbp_SRCS
edc.c
sbp.c
)
add_library(sbp-static STATIC ${libsbp_SRCS})
install(TARGETS sbp-static DESTINATION lib${LIB_SUFFIX})
if(BUILD_SHARED_LIBS)
add_library(sbp SHARED ${libsbp_SRCS})
install(TARGETS sbp DESTINATION lib${LIB_SUFFIX})
else(BUILD_SHARED_LIBS)
message(STATUS "Not building shared libraries")
endif(BUILD_SHARED_LIBS)
install(FILES ${libsbp_HEADERS} DESTINATION include/libsbp)

这是/libsbp/c/中的CMakeList.txt

cmake_minimum_required(VERSION 2.8.9)
project(libsbp)
# Setup flags for Code Coverage build mode
set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG} --coverage" CACHE STRING
"Flags used by the C++ compiler for building with code coverage."
FORCE )
set(CMAKE_C_FLAGS_COVERAGE "${CMAKE_C_FLAGS_DEBUG} --coverage" CACHE STRING
"Flags used by the C compiler for building with code coverage."
FORCE )
SET(CMAKE_EXE_LINKER_FLAGS_COVERAGE
"${CMAKE_EXE_LINKER_FLAGS_DEBUG} --coverage" CACHE STRING
"Flags used for linking binaries with code coverage."
FORCE )
set(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
"${CMAKE_SHARED_LINKER_FLAGS_DEBUG} --coverage" CACHE STRING
"Flags used by the shared libraries linker during builds with code coverage."
FORCE )
mark_as_advanced(
CMAKE_CXX_FLAGS_COVERAGE
CMAKE_C_FLAGS_COVERAGE
CMAKE_EXE_LINKER_FLAGS_COVERAGE
CMAKE_SHARED_LINKER_FLAGS_COVERAGE )
# Update the documentation string of CMAKE_BUILD_TYPE for GUIs
set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage."
FORCE )
# Set project version using Git tag and hash.
execute_process(
COMMAND git describe --dirty --tags --always
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
RESULT_VARIABLE GIT_VERSION_FOUND
ERROR_QUIET
OUTPUT_VARIABLE GIT_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if (GIT_VERSION_FOUND)
set(VERSION "unknown")
else (GIT_VERSION_FOUND)
set(VERSION ${GIT_VERSION})
endif (GIT_VERSION_FOUND)
# Set project version explicitly for release tarballs.
#set(VERSION foo)
message(STATUS "libsbp version: ${VERSION}")
cmake_minimum_required(VERSION 2.8)
set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
# Some compiler options used globally
set(CMAKE_C_FLAGS "-Wall -Wextra -Wno-strict-prototypes -Wno-unknown-warning-option -Werror -std=gnu99 ${CMAKE_C_FLAGS}")
add_subdirectory(src)
add_subdirectory(docs)
add_subdirectory(test)