mex error for path names with spaces

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Marina Frants
Marina Frants 2021-9-23
评论： Walter Roberson 2021-9-27
I'm running Matlab R2016b (no, I can't upgrade it, that's what my employer is licensed for) on Windows, and trying to use mex to compile a c++ script I was given. I need to include MySQL in the compile, and I'm trying to do so as follows:
mex <my script> -I'C:\Program Files\MySQL\MySQL Server 8.0\include\' -L'C:\Program Files\MySQL\MySQL Server 8.0\lib' -lmysqlclient
I get the following error:
Building with 'MinGW64 Compiler (C++)'.
Error using mex
g++: error: Files\MATLAB\R2016b/extern/include -IC:\Program: Invalid argument
g++: error: Files\MATLAB\R2016b/simulink/include -fexceptions -fno-omit-frame-pointer -std=c++11 -O -DNDEBUG
C:\Users\marina\ZooScanDatabase_scripts_GUI_access_09Jun2021_R2016b\mysql.cpp -o
C:\Users\marko\AppData\Local\Temp\mex_71592438356584_12624\mysql.obj : No such file or directory
g++: fatal error: no input files
compilation terminated.
It looks like mex is having problems with the spaces in the path names I'm giving to -I and -L. I tried different combinations of single and double qotes, as well as no quotes at all, but nothing works. Is there a way to get around this?
  1 个评论
Jan
Jan 2021-9-23
"I tried different combinations of single and double quotes"
It is useful to post, what you have tried. Then the readers do not have to post this again.

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采纳的回答

Marina Frants
Marina Frants 2021-9-24
Well, I found a very kludgey work-around. I'm not sure why it works when single quotes don't, but it's better than nothing I guess.
Basically, I did cd to the include directory withing matlab, and set includelib=pwd. Then did the same in the link directory, with linklib=pwd.
Then I did the mex command as follows:
mex('<myfile>', ['-I' includelib], ['-L' linklib], '-lmysqlclient')
Of course, now I'm getting a ton of compiler errors, but that's an issue for a different question...
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显示 1更早的评论
Marina Frants
Marina Frants 2021-9-27
Jan,
I agree that is should be exactly the same, but it doesn't work:
mex('mysql.cpp',...
'-IC:\Program Files\MySQL\MySQL Server 8.0\include\',...
'-LC:\Program Files\MySQL\MySQL Server 8.0\lib\',...
'-llibmysql')
Building with 'MinGW64 Compiler (C++)'.
Error using mex
g++: error: Files\MATLAB\R2016b/extern/include -IC:\Program: Invalid argument
g++: error: Files\MATLAB\R2016b/simulink/include -fexceptions -fno-omit-frame-pointer -std=c++11 -O -DNDEBUG
C:\Users\marina\ZooScanDatabase_scripts_GUI_access_09Jun2021_R2016b\mysql.cpp -o
C:\Users\marko\AppData\Local\Temp\mex_892763431102152_15956\mysql.obj : No such file or directory
g++: fatal error: no input files
compilation terminated.
Only the workaround with pwd works.
Walter Roberson
Walter Roberson 2021-9-27
mex('mysql.cpp',...
'-I"C:\Program Files\MySQL\MySQL Server 8.0\include\"',...
'-L"C:\Program Files\MySQL\MySQL Server 8.0\lib\"',...
'-llibmysql')

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更多回答（2 个）

Jan
Jan 2021-9-23
Try this:
mex('<my script>', '-I"C:\Program Files\MySQL\MySQL Server 8.0\include\"', ...
'-L"C:\Program Files\MySQL\MySQL Server 8.0\lib"', '-lmysqlclient')
  1 个评论
Marina Frants
Marina Frants 2021-9-23
Hi, Jan.
I tried it just now, and got the same error.
I've also tried:
mex <my script> -I'"C:\Program Files\MySQL\MySQL Server 8.0\include\" ' -L'"C:\Program Files\MySQL\MySQL Server 8.0\lib"' -lmysqlclient
and:
mex <my script> -I"C:\Program Files\MySQL\MySQL Server 8.0\include\"-L"C:\Program Files\MySQL\MySQL Server 8.0\lib" -lmysqlclient
No luck with any of them.

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Steven Lord
Steven Lord 2021-9-23
Ran in:
Wrap all the text inputs that can contain spaces in single quotes.
disp 'Hello world!' % Equivalent of disp('Hello world!')
Hello world!
fprintf '%s \t%s\n' 'abracadabra' 'hocus pocus' % fprintf('%s \t%s\n', 'abracadabra', 'hocus pocus')
abracadabra hocus pocus

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