wiki:user-comments

Version 5 (modified by stefan, 12 years ago) (diff)

some note on intel and gcc 3.3.5 compiler

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User Comments

Users are encouraged to share tricks and comments on this wiki page. For example, if you run into a strange configuration problem and found a work around that might work for others, it would be great if you could write it down here. Beside saving other users some time, this is also useful for the COIN developers to get some feedback, and to get some ideas as to what can be improved or better documented.

Comments and Tricks for Configuration

Configuring OSI with CPLEX 9.0 on Windows XP with MinGW (gcc 3.4.5) and MSYS

Problem: ./configure script fails with the following error: "Cannot find symbol CPXgetstat with CPX".

Solution: Run the script with --disable-cplex-libcheck option.

More info: The script fails during a check of the CPLEX library. Apart from that, the script works without problems. Disabling the check thus "solves" the problem. The "make" and "make test" commands then should work without any additional changes - just remember to have the CPLEX dll in the path and ILOG_LICENSE_FILE system variable pointing to the CPLEX license file...

Comments and Tricks for Compilation

  • 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.
  • GCC 3.3.5 seem to have some bug in its optimization routines regarding the omission of frame pointers. What seem to work is OPT_CXXFLAGS="-O3 -fno-omit-frame-pointer -momit-leaf-frame-pointer -DNDEBUG"

Comments and Tricks for Using COIN Libraries