[GRASS-dev] Re: [GRASS GIS] #657: add --with-openmp support to ./configure

[GRASS GIS]

#657: add --with-openmp support to ./configure
-----------------------+----------------------------------------------------
 Reporter:  hamish     |       Owner:  grass-dev@…              
     Type:  task       |      Status:  new                      
 Priority:  normal     |   Milestone:  7.0.0                    
Component:  Compiling  |     Version:  svn-trunk                
 Keywords:  openmp     |    Platform:  All                      
      Cpu:  All        |  
-----------------------+----------------------------------------------------

Comment(by hamish):

 added in trunk with r49652 with support for: gcc (>=4.2.1), Intel's C
 compiler, AMD's x86 Open64 compiler, and PGI's compiler. Additional
 support for Solaris cc, AIX xlc, and SGI IRIX 6.5 MIPSpro C is known but
 left commented out for now.


 todo:
 {{{
 # try to build a test program with "$CC $OMPCLFAGS" to confirm it works
 #...how?
 #echo "int main() {return 0;}" > test.c
 #$CC $OMPCLFAGS test.c -o test
 }}}


 I think the test compile is better than explicitly checking the gcc
 version,
 {{{
 GCC_VERSION=`${CC} -dumpversion`
 GCC_VERSION_MAJOR=$(echo $GCC_VERSION | cut -d'.' -f1)
 GCC_VERSION_MINOR=$(echo $GCC_VERSION | cut -d'.' -f2)
 GCC_VERSION_PATCH=$(echo $GCC_VERSION | cut -d'.' -f3)
 }}}

 for a gcc version test, see also:
  http://git.savannah.gnu.org/gitweb/?p=autoconf-
 archive.git;a=blob_plain;f=m4/ax_gcc_version.m4


 a positive but reasonably inefficient speedup for v.surf.rst has been
 added in r49653.


 Hamish

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/657#comment:6>
GRASS GIS <http://grass.osgeo.org>