[CMake] pg compilers on the Cary XT4

[Will Dicharry]

John R. Cary wrote:
> which is basically Linux.
> 
> Building a project with pgcc/pgCC.
> 
> 
> All flags are empty:
> 
> CMAKE_CXX_COMPILER               
> /opt/pgi/8.0.4/linux86-64/8.0-4/bin/pgCC    
> CMAKE_CXX_FLAGS                                                               
> 
> CMAKE_CXX_FLAGS_DEBUG                                                         
> 
> CMAKE_CXX_FLAGS_MINSIZEREL                                                    
> 
> CMAKE_CXX_FLAGS_RELEASE                                                       
> 
> CMAKE_CXX_FLAGS_RELWITHDEBINFO
> Where should I add these?

Hi John,

I use CMake to build software on Cray XT3, 4, and 5 machines.  I started 
on an XT3 with a Catamount backend, so a cross compile was actually 
necessary and I set the above options in a toolchain file and passed the 
file into cmake with -DCMAKE_TOOLCHAIN_FILE.

For the XT4, the CNL backend no longer requires a cross compile. We had 
a discussion on the list about this last month, and for setting the 
compilers I believe the consensus was to either:

1.  Set them as environment variables.  CMake will check the value of 
the environment variables CC, CXX, and FC for the names of the C, C++, 
and Fortran compilers respectively.

2. Use cmake -C to pass an initial cache containing CMAKE_C_COMPILER, 
CMAKE_CXX_COMPILER, etc.

> 
> 
> Another question: The default builds seem to be DEBUG,
> MINSIZEREL, RELEASE, RELWITHDEBINFO.  Suppose I wanted
> to define a new kind of build, e.g., PERFORMANCE.
> How can I go about doing this?

When using the makefile generator, you can define a new build type by 
setting it in the CMAKE_BUILD_TYPE variable and defining language flags 
for that type, so you could do something like:

set( CMAKE_BUILD_TYPE PERFORMANCE )
set( CMAKE_C_FLAGS_PERFORMANCE "-O3" )
set( CMAKE_CXX_FLAGS_PERFORMANCE "-O3" )

take a look at http://www.cmake.org/Wiki/CMake_Useful_Variables in the 
CMAKE_BUILD_TYPE section.

Hope this helps,
Will

> 
> Thanks....John Cary
> 
> 
> 
> 


-- 
Will Dicharry
Software Developer
Stellar Science Ltd Co
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