No supported MEX compiler, but codegen executes successfully

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dkv
dkv 2017-3-16
回答： Ryan Livingston 2017-3-17
Hi all,
I'm working with MATLAB Coder (R2016b, Windows 7 SP1) to get a speedup by compiling my function to a MEX file. The compilation is successful, and presumably Matlab is using the default LCC shipped with it, but I'd like to verify this for sanity purposes. However, when I run mex -setup I get a "No supported compiler for SDK found" error.
If this is intended and I install the MinGW compiler, how can I switch back and forth between the two?
Or, do I need to set an environment variable somewhere for Matlab to find LCC? If I do, how does the codegen command manage to find it without any additional help?

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回答（1 个）

Ryan Livingston
Ryan Livingston 2017-3-17
As it says here:
http://www.mathworks.com/help/coder/release-notes.html?searchHighlight=lcc&s_tid=doc_srchtitle
MATLAB Coder only uses LCC when there is no other compiler installed. If you install another compiler, LCC will not be used.
If performance is your goal, then I'd recommend using another compiler as LCC does not optimize to the degree of other compilers such as MinGW:
http://www.mathworks.com/help/coder/ug/how-to-accelerate-matlab-algorithms.html?searchHighlight=lcc&s_tid=doc_srchtitle

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