On 12/9/2013 1:26 PM, Eric Noulard wrote:
2013/12/9 pellegrini <pellegr...@ill.fr>:
Dear CMakers,
I have to build cmake files for a Fortran project using ifort compiler on
Windows, linux and macos platform.
That project will be linked to Winteracter Fortran library whose
installation paths are different depending on the 32
or 64 bit versions. Is there a way to automatically detect whether the build
is a 32 bit or 64 bit one in order to define
the correct path for Winteracter library ? Up to now, the only way I found
to do this was by introducing a cmake
option to my build (ON for 64bit build and OFF for a 32 one). I also saw the
CMAKE_CL_64 flag that could have been
interesting but unfortunately it is only for microsoft.
Usually you chekc the value of CMAKE_SIZEOF_VOID_P
which will be 8 on 64 bits system and 4 on 32 bits ones.
e.g. here is what I use:
# Test 32/64 bits
if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
message(STATUS "Target is 64 bits")
if (WIN32)
set(WINXXBITS Win64)
endif(WIN32)
else("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
message(STATUS "Target is 32 bits")
if (WIN32)
set(WINXXBITS Win32)
endif(WIN32)
endif("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
See:
http://www.cmake.org/pipermail/cmake/2011-February/042752.html
or
cmake --help-variable CMAKE_SIZEOF_VOID_P
thanks for your help
Eric
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Thanks Eric for the hint.
I read some time ago some stuffs about the CMAKE_SIZEOF_VOID_P variable
but unfortunately, in the present case,
the problem is a bit different. It can be for example that on a 64 bit
machine, I would like to use the 32 bit
ifort version because the only version of Winteracter library I have is
the 32 bit one. That's why I came to the point
that the only way to proceed was through a cmake option. I could also
try to guess the kind of build I would like from
the path of my compiler but this approach seems quite restrictive and
especially hazardous ...
Eric
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