Re: [Seqan-dev] FYI: CMake - Seqan - OpenMP support

Manuel Holtgrewe <manuel.holtgrewe@fu-berlin.de> · Tue, 10 May 2011 08:45:05 +0200

Using the new structure, you have to do this yourself. Currently,  

OpenMP is already searched for on the top level structure, so the  

OPENMP_FOUND flags are available. However, you have to add the define  

yourself in your CMakeLists.txt. With the new structure, you are  

mostly responsible for adding dependencies yourself.

For example:

cmake_minimum_required (VERSION 2.6)
project (sandbox_weese_apps_razers3)

if (OPENMP_FOUND)

  # We need a configuration header file.  First, configure this file,  

then

  # add the target directory to the inclue path.
  configure_file (${CMAKE_CURRENT_SOURCE_DIR}/config.h.in
                  ${CMAKE_CURRENT_BINARY_DIR}/config.h)
  include_directories(${CMAKE_CURRENT_BINARY_DIR})

  # Enable OpenMP.
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")

  # Add executable for RazerS 3.
  seqan_add_executable (razers3 razers.cpp)
elseif (OPENMP_FOUND)

  message(STATUS "Not building RazerS3, since OpenMP could not be  

found.")

endif (OPENMP_FOUND)

Am 10.05.2011 um 08:42 schrieb Fabian Buske:

Hi,

After porting my project to the new structure I noticed that the  

OpenMP

support didn't work properly anymore.

In Xcode you always have to tick the "Enable OpenMP Support"  

checkbox in

"Project Info/Build" after running the cmake command (which isn't too
much of a hassle).

For the Makefile version one, however, seems to have to add some flags
to tell the compiler to do as it is told, i.e. for gcc:

cmake ../.. -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_FLAGS="-fopenmp"

seems to work. I assumed cmake would take care of this.

Cheers,
Fabian

--
Fabian Buske
Institute for Molecular Bioscience
The University of Queensland
Brisbane, Qld. 4072 Australia
Phone: (61)-(7)-334-62641

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--
Manuel Holtgrewe			manuel.holtgrewe@fu-berlin.de
Freie Universität Berlin		http://www.inf.fu-berlin.de/
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