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Problem compiling libomp on OS X Yosemite 10.10.3

# ProductName: Mac OS X 
# ProductVersion: 10.10.3 
# Build: 14D136

# File: libomp_20150401_oss.tgz
# Xcode 6.3 

Need some help finding a solution to a problem building libomp. Here's the make command I used, followed by the errors: 

# terminal command: make compiler=clang build_args=fat 

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  • OpenMP scheduling overhead and analysis

    Hi, all

    I was programming with OpenMP,  and some points are not clear to me. 

    1) Does OpenMP of Intel has better performance than the GCC version? If it is true, how much benefit can Intel version gets?

    2) will  OpenMP compiler and runtime introduce barrier or memory fence operations? How to measure the overhead of these operations.

    3) Does the overhead of scheduling in OpenMP increases with the increasing of thread number? Are there some methods to measure the overhead? (Either intel or GCC version is ok.)

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