sys/times.h Compiling issue

Hello

I was trying to compile a mex file and I got the following error

>> mex -setup

MEX configured to use 'MinGW64 Compiler (C)' for C language compilation.

To choose a different language, select one from the following:

mex -setup C++

mex -setup FORTRAN

>> compileSparseCoLO

Compiling Libraries...Building with 'MinGW64 Compiler (C++)'.

Error using mex

In file included from

C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\mex\ccputime.cpp:26:0:

C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\mex\ccputime.h:28:23: fatal error:

sys/times.h: No such file or directory

#include <sys/times.h>

^

compilation terminated.

Error in compileSparseCoLO (line 81)

eval(command);

I'm not sure where is the problem and how to solve it. I would appreiate your help.

[Walter Roberson]

https://www.codefull.net/2015/12/systime-h-replacement-for-windows/

[Abdelrahman Aldik]

I have created the sys file as well as the three h files and I have put them in the same directory as my project. Still, I got the same error.

[Walter Roberson]

The code has a <> style #include. <> style #include does not look in the current directory, only on the include path. If the files are not stored in one of the standard include paths, then you will need to use the mex -I option to indicate the directory that has the sys folder inside it -- even if that is your project directory itself. For example,

mex -I. other arguments

the -I. means to treat . (current directory) as part of the include path -- base directories from which to try to find sys/times.h

[Abdelrahman Aldik]

I executed

>> mex -I. -setup C++

MEX configured to use 'MinGW64 Compiler (C++)' for C++ language compilation.

>> compileSparseCoLO

and still got the same error. What should I do?

[Abdelrahman Aldik]

I also have tried:

>> mex -I.(C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\sys) -setup C++

MEX configured to use 'MinGW64 Compiler (C++)' for C++ language compilation.

>> compileSparseCoLO

and still, got the same error!

[Abdelrahman Aldik]

I would appreciate it if I can get some feedback abut this issue.

[Walter Roberson]

compileSparseCoLO is a script. Edit in, and look near line 55 or so, where you will see an if/elseif series that starts with

if strcmp(computer, 'GLNXA64') && (MLVer(1) > 7 || (MLVer(1) == 7&& MLVer(2) > 2))

In the case of Windows, you need to find the "else" branch of that, which looks like

else % Mac, Windows or Solaris

which is then followed by

    MexFlags = ' -O ';

Change that line to

    MexFlags = ' -O -I"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112"';

[Abdelrahman Aldik]

Thanks alot for your reply. I managed to avoid tis error but I got the following error instead

>> mex -setup

MEX configured to use 'MinGW64 Compiler (C)' for C language compilation.

To choose a different language, select one from the following:

mex -setup C++

mex -setup FORTRAN

MEX configured to use 'MinGW64 Compiler (C++)' for C++ language compilation.

>> compileSparseCoLO

Compiling Libraries...Building with 'MinGW64 Compiler (C++)'.

MEX completed successfully.

done

Compiling mexForestConvert.cpp...Building with 'MinGW64 Compiler (C)'.

Error using mex

Cannot export mexFunction: symbol not defined

ccputime.obj:ccputime.cpp:(.text+0xd): undefined reference to `times(tms*)'

ccputime.obj:ccputime.cpp:(.text+0x3d): undefined reference to `gettimeofday(timeval*,

void*)'

collect2.exe: error: ld returned 1 exit status

Error in compileSparseCoLO (line 93)

eval(command);

[Walter Roberson]

You probably also need to add -L and -l (lower-case L) options . -L to name the location to search for a DLL, and -l naming the DLL to search for (which would be the DLL containing the compiled implementation of times)

[Abdelrahman Aldik]

Where should I add those? I would really appreaited if you can elaborate on that.

[Walter Roberson]

Although it is not ideal, you would change

    MexFlags = ' -O -I"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112"';

to

    MexFlags = ' -O -I"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112" -L"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\sys" -ltime';
    

but possibly what you would need is

       MexFlags = ' -O -I"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112" "C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\sys\time.obj"';

[Abdelrahman Aldik]

Upon usng this line:

MexFlags = ' -O -I"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112" -L"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\sys" -ltime';

I have received the following error

>> compileSparseCoLO

Current directory is = C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\mex

Cannot find sub-directory "mex"

Execute this script at the top directory of SparseCoLO

>> compileSparseCoLO

Compiling Libraries...Error using mex

MEX cannot find library 'time', specified with the -l option.

MEX searched for a file with one of the following names:

libtime.a

time.lib

libtime.lib

Verify the library name is correct. If the library is not

on the existing path, specify the path with the -L option.

Error in compileSparseCoLO (line 81)

eval(command);

And upon using this line

MexFlags = ' -O -I"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112" "C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\sys\time.obj"';

I received this following error

>> compileSparseCoLO

Compiling Libraries...Building with 'MinGW64 Compiler (C++)'.

MEX completed successfully.

done

Compiling mexForestConvert.cpp...Error using mex

C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\mex\"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\sys\time.obj"mexForestConvert.cpp

not found; check that you are in the correct current folder, and check the spelling of

'C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\mex\"C:\Users\Abd-PC\Downloads\SparseCoLO112\SparseCoLO112\sys\time.obj"mexForestConvert.cpp'.

Error in compileSparseCoLO (line 93)

eval(command);

I'm not sure what to do next?

[Abdelrahman Aldik]

I have installed Microsoft Visual C++ 2019 and used it to compile the mex file, I got the following error

>> compileSparseCoLO

Compiling Libraries...Building with 'MinGW64 Compiler (C++)'.

MEX completed successfully.

done

Compiling mexForestConvert.cpp...Building with 'Microsoft Visual C++ 2019 (C)'.

Error using mex

LINK : error LNK2001: unresolved external symbol mexFunction

ccputime.lib : fatal error LNK1120: 1 unresolved externals

I would appreciate your help.