Compilation with TDM-GCC under windows

[phicore]

It can be done but the CMakelists.txt must be sligthly updated

First WIN32 must be defined explicitely by adding:

if(WIN32)
    add_definitions ("-DWIN32")
endif()

and also adding -std=c++11 in case we are not using MSVC

if(MSVC)
  if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
    string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
  else()
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
  endif()
else()
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -std=c++11")
endif()

Beside this nanogui works out of the box with the current TDM (tdm64-gcc-5.1.0-2.exe)

[wjakob]

Hi,

I decided to make a different set of changes. Can you check if you can compile the latest version out of the box?

Thanks, Wenzel

[phicore]

Hi,

Your last changes have the benefit of creating the library and the both examples out of the box without tweaking the CMakelists.txt.

But unfortunately the executables are not working anymore:

During the link phase i saw something new about LTO items

Indeed if I comment out the line

  set_property(TARGET nanogui APPEND_STRING PROPERTY COMPILE_FLAGS "-flto ")

Everything is fine again. So the message is clear TDM-GCC unlike standard GCC doesn't like LTO.

Best regards

[phicore]

I was able to suppress the linker warnings by applying what is included here :

http://stackoverflow.com/questions/32221221/mingw-x64-windows-plugin-needed-to-handle-lto-object

But the executables are still not working

So the only thing working for me currently is removing the -flto option altogether.

[wjakob]

ok, another attempt. I tried to add some code that tries to autodetect if -flto is supported in the first place.

Can you check if you're able to compile the latest nanogui out of the box?

[wjakob]

I committed this in cee7e0307866cf4897f5eb9f1aece3aba0b51630 -- please check that version.

[phicore]

It works perfectly now out of the box. Thanks for supporting a now even larger set of the platforms out there.

[wjakob]

Great, thanks. I am closing this ticket then.