CMake找到正确的库，但是VC ++尝试与其他内容链接 [英] CMake finds the correct library, but VC++ attempts to link with something else

问题描述

我有一个CMake模块来定位FreeGLUT：

  FIND_PATH（FREEGLUT_INCLUDE_DIR NAMES GL / freeglut.h）
 FIND_LIBRARY（FREEGLUT_LIBRARY名称freeglut freeglut_static）
 
 SET（FREEGLUT_LIBRARIES $ {FREEGLUT_LIBRARY}）
 SET（FREEGLUT_INCLUDE_DIRS $ {FREEGLUT_INCLUDE_DIR}）
 
（$ b FIND_PACKAGE_HANDLE_STANDARD_ARGS（FreeGLUT DEFAULT_MSG FREEGLUT_LIBRARY FREEGLUT_INCLUDE_DIR）
 
 MARK_AS_ADVANCED（FREEGLUT_INCLUDE_DIR FREEGLUT_LIBRARY）
  当我在Windows上生成NMake Makefile时，它可以正常工作并找到 freeglut_static.lib 。我正在尝试将FreeGLUT静态链接到我的DLL：
  FIND_PACKAGE（需要FreeGLUT）
 
 ADD_LIBRARY （vti SHARED $ {VTI_SOURCES}）
 ADD_DEFINITIONS（-DBUILD_VTI = 1 -DFREEGLUT_STATIC = 1）
 INCLUDE_DIRECTORIES（$ {CMAKE_SOURCE_DIR} / include $ {FREEGLUT_INCLUDE_DIRS} _S 
 TAR {FREEGLUT_LIBRARIES}）
  
我的源代码正确构建，但是进入链接阶段时，VC ++失败
 
 
 LINK：致命错误LNK1104：无法打开文件'freeglut.lib'
 
 
这很奇怪，因为在生成的NMake makefile中看不到 freeglut.lib 的地方。它应该尝试链接CMake在 FREEGLUT_LIBRARIES 中定位并设置的 freeglut_static.lib 。
 
 
 
可能是什么原因？
解决方案
这是由 pragma 指令（请参见freeglut_std.h）。使用FREEGLUT_STATIC确实可以为您解决该问题，但是我认为您应该将其传递给CMake，不要使用引号： ADD_DEFINITIONS（-DBUILD_VTI -DFREEGLUT_STATIC） 
 
I have a CMake module to locate FreeGLUT:
FIND_PATH(FREEGLUT_INCLUDE_DIR NAMES GL/freeglut.h)
FIND_LIBRARY(FREEGLUT_LIBRARY NAMES freeglut freeglut_static)

SET(FREEGLUT_LIBRARIES ${FREEGLUT_LIBRARY})
SET(FREEGLUT_INCLUDE_DIRS ${FREEGLUT_INCLUDE_DIR})

INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(FreeGLUT DEFAULT_MSG FREEGLUT_LIBRARY FREEGLUT_INCLUDE_DIR)

MARK_AS_ADVANCED(FREEGLUT_INCLUDE_DIR FREEGLUT_LIBRARY)
It works fine and locates freeglut_static.lib when I generate NMake Makefiles on Windows. I'm attempting to statically link FreeGLUT into my DLL:
FIND_PACKAGE(FreeGLUT REQUIRED)

ADD_LIBRARY(vti SHARED ${VTI_SOURCES})
ADD_DEFINITIONS("-DBUILD_VTI=1 -DFREEGLUT_STATIC=1")
INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include ${FREEGLUT_INCLUDE_DIRS})
TARGET_LINK_LIBRARIES(vti ${FREEGLUT_LIBRARIES})
My source code builds correctly, but when it gets to the linking stage, VC++ fails with:

  
LINK : fatal error LNK1104: cannot open file 'freeglut.lib'
Which is strange since freeglut.lib isn't mentioned anywhere that I can see in the generated NMake makefiles. It should be trying to link with freeglut_static.lib, which CMake locates and sets in FREEGLUT_LIBRARIES.

What might be causing this?
解决方案
This is caused with pragma directives in FreeGLUT code (see freeglut_std.h). Using FREEGLUT_STATIC should really fix that for you, but I think you should pass it to CMake without quotes: ADD_DEFINITIONS(-DBUILD_VTI -DFREEGLUT_STATIC)

                        
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