[Cmake] large file support

[Peng Liwei]

What I want is this:

some computer platforms support 64-bit files,
some only support 32-bit. To make our program
portable, we would like CMake automatically
detect, when I run 'ccmake', whether the platform
support 64 or not.
If it supports 64-bit file , then add certain compiler
flag. 

Thanks.

liwei

--- Brad King <brad . king at kitware . com> wrote:
> On Thu, 9 Oct 2003, Peng Liwei wrote:
> 
> > I am using CMake to build our C++ software
> > system on RedHat 9 Linux. Can anyone tell me
> whether
> > Cmake has large file support options (64 bits)
> > so that we can fseek a 5GB file?
> >
> > I know autoconf/automake system has such support.
> > Does CMake have a similar way?
> 
> I'm afraid we don't understand what you're asking. 
> What program in the
> toolchain do you want to access a 5 GB file?  CMake?
> make? The compiler?
> The program that is compiled?
> 
> If you just want your software compiled with the
> proper flags to enable
> 64-bit fseek operations, then you can add the flags
> yourself to
> CMAKE_C_FLAGS and CMAKE_CXX_FLAGS.  If building your
> software requires
> these flags and will not work without them, then it
> is possible to write
> CMakeLists.txt files that automatically add the
> flags by detecting the
> compiler being used.
> 
> -Brad
> 


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