cmake尝试链接资源文件

Question

如何阻止cmake链接MACOSX捆绑包资源文件？

当我将资源文件添加到MACOSX应用程序包时，链接器会由于其.obj后缀而占用它。链接器尝试链接它但没有成功。他写了一个警告：

Linking CXX executable mwe.app/Contents/MacOS/mwe
ld: warning: ignoring file ../star.obj, file was built for unsupported file format
( 0x23 0x20 0x42 0x6C 0x65 0x6E 0x64 0x65 0x72 0x20 0x76 0x32 0x2E 0x37 0x30 0x20 ) 
which is not the architecture being linked (x86_64): ../star.obj

当然他无法链接，因为star.obj是obj format中的3D模型文本文件：

# Blender v2.70 (sub 0) OBJ File: 'star.blend'
o Plane
v 0.510396 -0.000389 0.998397
v -0.926169 -0.000017 -0.001603
v 0.510396 0.000355 -1.001603
[..and many more vertices]

由此产生的问题是;该文件未放入MACOSX包文件夹，因为链接器忽略它。

VisorZ@Mac ~/MWE> ll build/mwe.app/Contents/Resources/
total 8
-rw-r--r--  1 Stephan  staff    62B  6 Aug 22:36 star.off

（请参阅此处遗漏star.obj）----------------------------------- - ^

我想通过cmake从链接文件列表中排除该obj文件。

但源文件属性

• MACOSX_PACKAGE_LOCATION，
• EXTERNAL_OBJECT FALSE，
• LANGUAGE“myMODEL”

也不是目标属性

• RESOURCE

可以做到这一点。这是一个最小工作示例CMakeLists.txt：

# Minimum Working Example to create mwe.app on MACOSX with linker
# trying to process *.obj files which are marked as resource files

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(mwe)

SET_SOURCE_FILES_PROPERTIES( 
    star.obj        # 3D model as OBJ txt file
    star.off        # 3D model as OFF txt file
    PROPERTIES 
    MACOSX_PACKAGE_LOCATION Resources 
    ) 

ADD_EXECUTABLE( 
    ${PROJECT_NAME} 
    MACOSX_BUNDLE   # needs to be second argument, enables bundling
    helloworld.cpp  # will be compiled
    star.obj        # will not be bundled because it will be taken by linker 
    star.off        # will be bundled 
    )

Answer 1

使用HEADER_FILE_ONLY并尽量不要过多考虑它的名称。

set_source_files_properties( 
    star.obj        # 3D model as OBJ txt file
    star.off        # 3D model as OFF txt file
    PROPERTIES 
    HEADER_FILE_ONLY ON 
) 

Answer 2

如果要阻止链接器尝试链接文件，可以将它们添加到自定义目标中：

ADD_CUSTOM_TARGET (testTarget SOURCES myFile.obj myFile.off)

这对于在项目树中显示文件但没有编译/链接文件特别方便。