mingw-64 GCC é quebrado no Ubuntu

Question

Estou tentando compilar SFML do Linux para o Windows para um projeto meu. Pacotes SFML pré-construídos não são uma opção.

Então, eu instalei o pacote mingw-w64, e configurei um arquivo toolchain, e continuei tentando compilar o SFML a partir do código-fonte usando o CMake, apenas para descobrir que o compilador GCC fornecido está quebrado.

Mensagem de erro completa:

CMake Error at /usr/share/cmake-3.5/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler "/usr/bin/i686-w64-mingw32-gcc" is not able to compile a
  simple test program.

  It fails with the following output:

   Change Dir: /home/chemicalchems/SFML-2.3.2/build/CMakeFiles/CMakeTmp



  Run Build Command:"/usr/bin/make" "cmTC_9b6e7/fast"

  /usr/bin/make -f CMakeFiles/cmTC_9b6e7.dir/build.make
  CMakeFiles/cmTC_9b6e7.dir/build

  make[1]: Entering directory
  '/home/chemicalchems/SFML-2.3.2/build/CMakeFiles/CMakeTmp'

  Building C object CMakeFiles/cmTC_9b6e7.dir/testCCompiler.c.o

  /usr/bin/i686-w64-mingw32-gcc -o
  CMakeFiles/cmTC_9b6e7.dir/testCCompiler.c.o -c
  /home/chemicalchems/SFML-2.3.2/build/CMakeFiles/CMakeTmp/testCCompiler.c

  Linking C executable cmTC_9b6e7

  /usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_9b6e7.dir/link.txt
  --verbose=1

  /usr/bin/i686-w64-mingw32-gcc CMakeFiles/cmTC_9b6e7.dir/testCCompiler.c.o
  -o cmTC_9b6e7 -rdynamic

  i686-w64-mingw32-gcc: error: unrecognized command line option
  ‘-rdynamic’

  CMakeFiles/cmTC_9b6e7.dir/build.make:97: recipe for target 'cmTC_9b6e7'
  failed

  make[1]: *** [cmTC_9b6e7] Error 1

  make[1]: Leaving directory
  '/home/chemicalchems/SFML-2.3.2/build/CMakeFiles/CMakeTmp'

  Makefile:126: recipe for target 'cmTC_9b6e7/fast' failed

  make: *** [cmTC_9b6e7/fast] Error 2

Portanto, o problema é que o i686-w64-mingw32-gcc não aceita a opção -rdynamic . Eu tentei dizer ao CMake que ele não deveria testar o compilador C no meu arquivo de toolchain, mas ele continua checando e assim falhando.

Arquivo do conjunto de ferramentas:

set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR i686)
set(CMAKE_CROSSCOMPILING 1)

set(CMAKE_C_COMPILER_WORKS 1)

set(TOOLCHAIN_PREFIX i686-w64-mingw32)

# cross compilers to use for C and C++
set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}-gcc)
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}-g++)
set(CMAKE_RC_COMPILER ${TOOLCHAIN_PREFIX}-windres)

# target environment on the build host system
#   set 1st to dir with the cross compiler's C/C++ headers/libs
set(CMAKE_FIND_ROOT_PATH /usr/${TOOLCHAIN_PREFIX})

# modify default behavior of FIND_XXX() commands to
# search for headers/libs in the target environment and
# search for programs in the build host environment
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

Qualquer ajuda seria muito apreciada.