如何在沒有外部腳本的情況下鏈接CMake和SQLite？

Question

我有以下CMakeLists：

cmake_minimum_required (VERSION 2.8.12.2)
project (Tutorial)
find_package (sqlite3)
if (SQLITE3_FOUND)
  include_directories(${SQLITE3_INCLUDE_DIRS})
  target_link_libraries (new ${SQLITE3_LIBRARIES})
endif (SQLITE3_FOUND)
add_executable(Tutorial new.cpp)

但是，當我cmake時，我收到以下消息：

CMake Warning at CMakeLists.txt:3 (find_package):
  By not providing "Findsqlite3.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "sqlite3", but
  CMake did not find one.

  Could not find a package configuration file provided by "sqlite3" with any
  of the following names:

    sqlite3Config.cmake
    sqlite3-config.cmake

  Add the installation prefix of "sqlite3" to CMAKE_PREFIX_PATH or set
  "sqlite3_DIR" to a directory containing one of the above files.  If
  "sqlite3" provides a separate development package or SDK, be sure it has
  been installed.

我自己也嘗試這個和這個替代CMakeLists文件，但這些都沒有工作。

我也嘗試過這個並沒有用：

FIND_PATH(SQLITE3_INCLUDE_DIR NAMES sqlite3.h)
FIND_LIBRARY(SQLITE3_LIBRARY NAMES sqlite)
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SQLITE3 DEFAULT_MSG SQLITE3_LIBRARY SQLITE3_INCLUDE_DIR)
IF(SQLITE3_FOUND)
    SET(SQLITE3_LIBRARIES ${SQLITE3_LIBRARY})
    SET(SQLITE3_INCLUDE_DIRS ${SQLITE3_INCLUDE_DIR})
ELSE(SQLITE3_FOUND)
    SET(SQLITE3_LIBRARIES)
    SET(SQLITE3_INCLUDE_DIRS)
ENDIF(SQLITE3_FOUND)

MARK_AS_ADVANCED(SQLITE3_INCLUDE_DIRS SQLITE3_LIBRARIES)

如何在不使用擴展名的情況下鏈接SQLite？

謝謝！

Answer 1

你基本上有兩個選擇：
1）在項目的根目錄中有一個名為cmake的目錄中有一個FindSQLite3.cmake ，就像你已經嘗試過的下面的FindSQLite3.cmake但是你需要有類似下面這樣的東西

cmake_minimum_required (VERSION 2.8.12.2)
project (Tutorial)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
add_executable(tutorial new.cpp)
find_package (SQLite3)
if (SQLITE3_FOUND)
  include_directories(${SQLITE3_INCLUDE_DIRS})
  target_link_libraries (tutorial ${SQLITE3_LIBRARIES})
endif (SQLITE3_FOUND)

2）因為你知道你的sqlite3包含目錄和庫的位置你可以直接設置它們的路徑，在你的CMakeLists.txt你會有類似link_directories()和include_directories() ，例如你將有以下幾行：

cmake_minimum_required (VERSION 2.8.12.2)
project (Tutorial)
add_executable(tutorial new.cpp)
include_directories(/usr/include)
link_directories(/usr/lib)
target_link_libraries(tutorial sqlite3)

這兩個方向的東西應該有效。
就個人而言，我建議采用第一種方法。

Answer 2

我剛剛將以下sting添加到我的CMakeLists.txt文件中並且它可以工作。

find_package (SQLite3)

include_directories(${SQLite3_INCLUDE_DIRS})
target_link_libraries (${OUT_TARGET} ${SQLite3_LIBRARIES})

cmake版本3.14.3