Changes between Version 4 and Version 5 of user-comments


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Timestamp:
Feb 6, 2008 2:31:39 PM (12 years ago)
Author:
stefan
Comment:

some note on intel and gcc 3.3.5 compiler

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  • user-comments

    v4 v5  
    1616== Comments and Tricks for Compilation ==
    1717
     18 * When compiling with Intel compilers, it can be advantageous to add the compiler flag -mp1 ({{{ADD_CXXFLAGS=-mp1}}}). This disables some optimization, but improves floating point accuracy. In my case it helped to make (x == 0./0.) return false if x is not nan.
     19
     20 * GCC 3.3.5 seem to have some bug in its optimization routines regarding the omission of frame pointers. What seem to work is
     21 {{{OPT_CXXFLAGS="-O3 -fno-omit-frame-pointer -momit-leaf-frame-pointer -DNDEBUG" }}}
     22
    1823== Comments and Tricks for Using COIN Libraries ==