CMake Errors During Configuration

[jarruda]

When configuring the project using a recent version of CMake (tested with 3.3.1 and 3.3.2), lots of errors are reported.

> cmake .. -G "Visual Studio 12 Win64"

CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_CXX_FLAGS_DEBUGOPT

This error is repeated maybe 30 times, then it alternates:

CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_EXE_LINKER_FLAGS_DEBUGOPT
CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
Missing variable is:
CMAKE_CXX_FLAGS_DEBUGOPT

The project seems to build fine following this. The issue is that when using the project through CMake's ExternalProject_Add, where these errors are treated like compile errors and fail any dependent projects.

[JonathanHenson]

I noticed this when writing some CI pipelines up today. My work around, since it caused Jenkins to falsely report an error was to pass arguments like -DCMAKE_EXE_LINKER_FLAGS_DEBUGOPT="" etc.... to my cmake command. I'll research more on this and come up with a more permanent solution shortly.

[jarruda]

That workaround worked great, thanks.

Might be worthwhile to submit a bug over at https://public.kitware.com/Bug/my_view_page.php and point them at this project?

[boinst]

I observed this same issue using CMAKE 3.5.0 RC1. Thanks for the workaround.

[DraconPern]

As others have mentioned before passing -DCMAKE_EXE_LINKER_FLAGS_DEBUGOPT="" -DCMAKE_CXX_FLAGS_DEBUGOPT="" to CMAKE fixed the issue for me on VS2015

[JonathanHenson]

I pushed an update recently to automatically add this to the configuration if it hasn't been set. It should no longer be necessary to specify these arguments.