Compiling with Mex - Can I reference Environment Variables?

6 次查看（过去 30 天）
Danny S
Danny S 2011-9-7
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?

请先登录，再回答此问题。

回答（2 个）

Kaustubha Govind
Kaustubha Govind 2011-9-7
Try:
mex -v COMPFLAGS="$COMPFLAGS -I%REF_DIR%/include" my_sfunction.c
I think this command, or a minor variation on it should work.
  1 个评论
Danny S
Danny S 2011-9-7
Sorry, didn't work - the % sign, even inside double quotes is being interpreted as the start of a comment, and the rest of the line is ignored:
>> mex -v COMPFLAGS="$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。

James Tursa
James Tursa 2011-9-8
Have you tried the function version of the mex command? E.g.,
mex('-v','COMPFLAGS="$COMPFLAGS -I%REF_DIR%/include"','my_sfunction.c')
This will force the arguments with embedded spaces to be interpreted by the mex command as single arguments instead of multiple arguments. You might need to make the 'COMPFLAGS=' a separate argument from the "etc" part ... not sure about this.
  3 个评论
显示 1更早的评论
James Tursa
James Tursa 2011-9-8
Can you double up the double quotes inside the double quotes? e.g.,
"$COMPFLAGS -I""%REF_DIR%""/include"
Timothé Boutelier
Timothé Boutelier 2017-3-23
use simple quote instead of double quote: mex -v COMPFLAGS='$COMPFLAGS -I%REF_DIR%/include' my_sfunction.c

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Simulink Coder 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by