[CMake] Some problems with EXE_EXTENSION

[Charles Boivin]

Hello all,

CMake newbie here. I have this custom command where I would need to make use
of EXE_EXTENSION (as referred to in the Mastering CMake book). However, it
seems that this is always empty, even for Visual Studio solutions. I also
dumped out ALL the variables to a file, and this particular variable does
not seem to be defined.

Here is my custom command. Please forgive any unneeded code due to
newbieness.. :-)

ADD_CUSTOM_COMMAND(
  TARGET ${EXECUTABLENAME}
  POST_BUILD
  COMMAND ${CMAKE_COMMAND}
  ARGS -E copy
${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${EXECUTABLENAME}${EXE_EXTENSION}

${CMAKE_BINARY_DIR}/bin/${CMAKE_CFG_INTDIR}/${EXECUTABLENAME}${EXE_EXTENSION}
  COMMENT "Copying executable to common folder..."
)

Anyone with a suggestion? Right now, since ${EXE_EXTENSION} is empty, the
resulting executable does not get copied.

I thank you all in advance.

Charles Boivin
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