CMake 添加不区分大小写的源文件

Question

I'm trying to build binaries natively in linux for an existing project with CMakeLists.txt's already built. I keep running into issues where the CMakeLists.txt is trying to add a header or source file but cannot. The source file exists in the directory its looking in but the cases dont match. For example, here is one of the header searches:

set(Headers
    resource.h
    stdafx.h
    ...
)

I had gotten an error saying fatal error: stdafx.h: No such file or directory , yet the file that was in the directory was StdAfx.h instead of stdafx.h . Apparently CMake cannot make the connection that these are the same files.

My issue is, this project file is 6 gb worth of code, and if I have to go in and change the includes for every single mis-capitalized file, I'm never gonna finish anything. Is there a way for me to tell CMake that the file names might have different capitalization? Or am I stuck doing everything by hand until it works.

EDIT: It looks as though its the Linux file system that is case sensitive, so I'm removing the cmake tag, as it is not an issue with cmake. Im looking for a solution that would allow me to change all the #include <....> lines within the .cpp files to match the existing header filenames instead of changing the .h file names.

EDIT: Just for anyone coming to this later, the full error is this:

[ 1%] Building CXX object Source/UeiSimuDriver/CMakeFiles/UeiSimuDriver_vc15.dir/StdAfx.cpp.o
In file included from /var/tmp/<workspaceHash>/Framework/Source/UeiSimuDriver/StdAfx.cpp:2 
fatal error: stdafx.h: No such file or directory
#include "stdafx.h"
compilation terminated

Answer 1

The issue is not with cmake, but with the filesystem. The filesystems in linux are generally case sensitive. stdafx.h is not the same file as Stdafx.h. If your CMakeLists.txt and source files use wrong case that doesn't match the name of the file, then the project is not compatible with linux and its filesystems. So, your options are:

1. Use a case-insensitive filesystem, since that is what the project supports
   1. You could try a case-insensitive filesystem on linux, but that is a hacky solution.
   2. Use windows.
2. Fix the project to support case sensitive filesystems by correcting the filenames and their references in CMakeLists.txt and inclusions. Note that there may be further problems when executing the program if it has been written with expectation of case-insensitive filesystem.

I'm never gonna finish anything

Simple solution: Change all filenames to lower case, change all references in CMakeLists.txt and inclusions in source to lower case: No need to perform a comparison or try to figure out include roots. Both can be performed with a short shell script. Although technically not correct because the source files have non-regular grammar, regular expression is probably enough to match include directives.

Answer 2

You could try to use file method for collecting all the files you need to build, for example:

file(GLOB SRCS "*.cpp")
file(GLOB HDRS "*.h")

add_executable(${PROJECT_NAME} ${HDRS} ${SRCS})

UPD: By so you can only collect any files no matter what their names are. You'd better to change filenames through some script.

Answer 3

Changing capitalization manually for the entire project might not be hard if you're using an editor that allows you to find and replace for the entire project.

There are examples like Visual Studio 2017 and Atom .

Just try to press ctrl + shift + H.