[CMake] Object files: .o vs .obj?

[David Cole]

No, it doesn't make sense. Can you construct a minimal example that
demonstrates this?
If not, there must be something in your project files that differentiates
between in-source and out-of-source builds...?
Are you changing compilers based on in-source/out-of-source?

The in-source/out-of-source change should have no effect on the suffix used
for object files. Isn't the obj file suffix typically chosen by the
compiler...?


On Fri, Oct 10, 2008 at 12:50 PM, Phil Smith <phil at voltage.com> wrote:

> Hm. If I do an out-of-source build, I get .o files.  If I do an in-source
> build, I get .obj.
>
> (Yes, I know in-source builds are considered Evil; the lead engineer wants
> to do 'em that way, not sure why, so I was testing to see if they'd work,
> noticed that I was getting .obj files.)
>
> Does this make any sense?
>
> ...phsiii
> -----Original Message-----
> From: cmake-bounces at cmake.org [mailto:cmake-bounces at cmake.org] On Behalf
> Of Phil Smith
> Sent: Thursday, October 09, 2008 12:27 PM
> To: CMake
> Subject: [CMake] Object files: .o vs .obj?
>
> With (allegedly) identical CMake setups, we have two machines that generate
> different outputs: .o vs. obj. The one that generates .obj has Visual Studio
> installed, the other doesn't.
>
> I tried adding
>        SET(CMAKE_C_OUTPUT_EXTENSION ".obj")
> to my Toolchain file, but it made no difference.
>
> The CMake invocation is:
>
> cmake -DCMAKE_TOOLCHAIN_FILE:string="%DIGNUS_SOURCE%\zosport.cmake" -G"Unix
> Makefiles" %DIGNUS_SOURCE%\vtk-core\
>
> I even added:
>  message(STATUS "Generator is ${CMAKE_GENERATOR}")
> in the ".obj" machine's CMakeLists.txt (that's the machine with Visual
> Studio installed), again, no difference.
>
> I'd slightly rather force .obj than .o, but in any case, I need it to be
> predictable. Any ideas?
> --
> ...phsiii
>
> Phil Smith III
> phil at voltage.com
> Voltage Security, Inc.
> www.voltage.com
> (703) 476-4511 (home office)
> (703) 568-6662 (cell)
>
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