我在/ usr / include / SDL2上安装了SDL2_image库（在这个目录中我可以找到SDL_image.h）。
当我使用CLion进行编译时，一切正常，但是在编辑器中，SDL2_image librarie的包含和函数出现错误（编译器找到了这个库，但编辑器找不到它。）
这是我的CMake：
<div class="form-field">
<p class="test-label">Input</p>
<input type="text" />
</div>有什么问题？
答案 0 :(得分：1)
使用此FindSDL2_image.cmake文件：
for /f "delims=" %%G in ('dir /s /ad /b "\sampledrive\Photos"') do ren "%%G" "David %%~nxG"
在我的源代码树中，我有一个名为cmake_modules的文件夹，上面找到了FindSDL2_image.cmake文件。
您可以阅读该.cmake文件的底部以查看该库并包含要使用的名称：# Locate SDL2_image library
# This module defines
# SDL2_IMAGE_LIBRARY, the name of the library to link against
# SDL2_IMAGE_FOUND, if false, do not try to link to SDL2_image
# SDL2_IMAGE_INCLUDE_DIR, where to find SDL_image.h
#
# Additional Note: If you see an empty SDL2_IMAGE_LIBRARY_TEMP in your configuration
# and no SDL2_IMAGE_LIBRARY, it means CMake did not find your SDL2_Image library
# (SDL2_image.dll, libsdl2_image.so, SDL2_image.framework, etc).
# Set SDL2_IMAGE_LIBRARY_TEMP to point to your SDL2 library, and configure again.
# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value
# as appropriate. These values are used to generate the final SDL2_IMAGE_LIBRARY
# variable, but when these values are unset, SDL2_IMAGE_LIBRARY does not get created.
#
# $SDL2 is an environment variable that would
# correspond to the ./configure --prefix=$SDL2
# used in building SDL2.
# l.e.galup 9-20-02
#
# Modified by Eric Wing.
# Added code to assist with automated building by using environmental variables
# and providing a more controlled/consistent search behavior.
# Added new modifications to recognize OS X frameworks and
# additional Unix paths (FreeBSD, etc).
# Also corrected the header search path to follow "proper" SDL2 guidelines.
# Added a search for SDL2main which is needed by some platforms.
# Added a search for threads which is needed by some platforms.
# Added needed compile switches for MinGW.
#
# On OSX, this will prefer the Framework version (if found) over others.
# People will have to manually change the cache values of
# SDL2_IMAGE_LIBRARY to override this selection or set the CMake environment
# CMAKE_INCLUDE_PATH to modify the search paths.
#
# Note that the header path has changed from SDL2/SDL.h to just SDL.h
# This needed to change because "proper" SDL2 convention
# is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability
# reasons because not all systems place things in SDL2/ (see FreeBSD).
#
# Ported by Johnny Patterson. This is a literal port for SDL2 of the FindSDL.cmake
# module with the minor edit of changing "SDL" to "SDL2" where necessary. This
# was not created for redistribution, and exists temporarily pending official
# SDL2 CMake modules.
#
# Note that on windows this will only search for the 32bit libraries, to search
# for 64bit change x86/i686-w64 to x64/x86_64-w64
#=============================================================================
# Copyright 2003-2009 Kitware, Inc.
#
# CMake - Cross Platform Makefile Generator
# Copyright 2000-2014 Kitware, Inc.
# Copyright 2000-2011 Insight Software Consortium
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the names of Kitware, Inc., the Insight Software Consortium,
# nor the names of their contributors may be used to endorse or promote
# products derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
FIND_PATH(SDL2_IMAGE_INCLUDE_DIR SDL_image.h
HINTS
${SDL2}
$ENV{SDL2}
$ENV{SDL2_IMAGE}
PATH_SUFFIXES include/SDL2 include SDL2
i686-w64-mingw32/include/SDL2
x86_64-w64-mingw32/include/SDL2
PATHS
~/Library/Frameworks
/Library/Frameworks
/usr/local/include/SDL2
/usr/include/SDL2
/sw # Fink
/opt/local # DarwinPorts
/opt/csw # Blastwave
/opt
)
# Lookup the 64 bit libs on x64
IF(CMAKE_SIZEOF_VOID_P EQUAL 8)
FIND_LIBRARY(SDL2_IMAGE_LIBRARY_TEMP
NAMES SDL2_image
HINTS
${SDL2}
$ENV{SDL2}
$ENV{SDL2_IMAGE}
PATH_SUFFIXES lib64 lib
lib/x64
x86_64-w64-mingw32/lib
PATHS
/sw
/opt/local
/opt/csw
/opt
)
# On 32bit build find the 32bit libs
ELSE(CMAKE_SIZEOF_VOID_P EQUAL 8)
FIND_LIBRARY(SDL2_IMAGE_LIBRARY_TEMP
NAMES SDL2_image
HINTS
${SDL2}
$ENV{SDL2}
$ENV{SDL2_IMAGE}
PATH_SUFFIXES lib
lib/x86
i686-w64-mingw32/lib
PATHS
/sw
/opt/local
/opt/csw
/opt
)
ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 8)
SET(SDL2_IMAGE_FOUND "NO")
IF(SDL2_IMAGE_LIBRARY_TEMP)
# Set the final string here so the GUI reflects the final state.
SET(SDL2_IMAGE_LIBRARY ${SDL2_IMAGE_LIBRARY_TEMP} CACHE STRING "Where the SDL2_image Library can be found")
# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
SET(SDL2_IMAGE_LIBRARY_TEMP "${SDL2_IMAGE_LIBRARY_TEMP}" CACHE INTERNAL "")
SET(SDL2_IMAGE_FOUND "YES")
ENDIF(SDL2_IMAGE_LIBRARY_TEMP)
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_IMAGE REQUIRED_VARS SDL2_IMAGE_LIBRARY SDL2_IMAGE_INCLUDE_DIR)
然后在我的cmake文件中看起来像这样：
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_IMAGE REQUIRED_VARS SDL2_IMAGE_LIBRARY SDL2_IMAGE_INCLUDE_DIR)答案 1 :(得分：0)
FindPkgConfig模块调用pkg-config命令获取链接/编译器标志。在您的情况下，pkg-config可能无法找到设置，因此CMake无法获取该信息。
请尝试打开控制台/终端（或msys，msys2，无论您使用的是什么）。然后拨打pkg-config SDL2_image --libs。如果它正常工作你应该看到类似的东西（我在Windows上使用MSYS2，在其他平台上它会有点不同）： -
$ pkg-config SDL2_image --libs
-LC:/msys64/mingw64/lib -lSDL2_image -lmingw32 -lSDL2main -lSDL2
注意：该命令区分大小写。
如果它不起作用，那么您可能必须手动更新pkgconfig文件。这与系统不同（Linux上的默认设置是/ usr / lib / pkgconfig，但在发行版之间可能会有所不同）。在最坏的情况下，您必须手动编写pkgconfig文件。
无论如何，如果您可以指定当前正在使用的操作系统和平台，那会更好。
答案 2 :(得分：0)
取决于您正在使用的编译器，以及其他因素，具体取决于您获得的错误。
在你的
上 TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${SDL2_LIBRARIES} ${SDL2IMAGE_LIBRARIES})
您可能需要更多连接器，或者由于某种原因它们可能无法正常拾取。
对于类似的项目，我看起来像这样 target_link_libraries(${PROJECT_NAME} -lmingw32 -lSDL2main -lSDL2 -lSDL2_image)
使用mingw编译器，它似乎工作正常。