Compiling with Mex - Can I reference Environment Variables?

Question

Danny S 2011-9-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/15289-compiling-with-mex-can-i-reference-environment-variables

评论： Timothé Boutelier 2017-3-23

I'm attempting to compile a Simulink S-Function with Mex, which #includes some header files that are from another directory on our system. This directory is defined in an environment variable.

Is it possible to reference the environment variable in the mex -I or -L options?

e.g. mex -I$(REF_DIR)/include my_sfunction.c

On Windows, this is tricky as you refer to environment variables using %REF_DIR%, which won't work in Matlab, as % signifies a comment

Do I just have to bite the bullet and put in the full path? Or edit mexopts.bat?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Kaustubha Govind 2011-9-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/15289-compiling-with-mex-can-i-reference-environment-variables#answer_20769

在 MATLAB Online 中打开

Try:

mex -v COMPFLAGS="$COMPFLAGS -I%REF_DIR%/include" my_sfunction.c

I think this command, or a minor variation on it should work.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Danny S 2011-9-7

Sorry, didn't work - the % sign, even inside double quotes is being interpreted as the start of a comment, and the rest of the line is ignored:

>> mex -v COMPFLAGS="$COMPFLAGS -I%REF_DIR%/include" my_sfunction.c

Unmatched double quote: "$COMPFLAGS -I

??? Error using ==> mex

Unable to complete successfully

Thanks for the suggestion, though.

请先登录，再进行评论。

Answer 2

James Tursa 2011-9-8

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/15289-compiling-with-mex-can-i-reference-environment-variables#answer_20822

在 MATLAB Online 中打开

Have you tried the function version of the mex command? E.g.,

mex('-v','COMPFLAGS="$COMPFLAGS -I%REF_DIR%/include"','my_sfunction.c')

This will force the arguments with embedded spaces to be interpreted by the mex command as single arguments instead of multiple arguments. You might need to make the 'COMPFLAGS=' a separate argument from the "etc" part ... not sure about this.