Re: More - Problems with mkoctfile using GCC 4.8.1

[Terry Duell]

Hello Mike,

On Fri, 11 Oct 2013 08:54:35 +1100, Mike Miller <address@hidden> wrote:

> Hi Terry, did you mean to reply off-list or forget to reply-all?

Yes, I forgot to reply-all, sorry.
> On Fri, Oct 11, 2013 at 08:24:43 +1100, Terry Duell wrote:
> > Fred.c was just a name as an example.
> > I don't have the specific error messages, but I recall they related to
> > mxDOUBLE.
> > I have just tried to reproduce the problem, but can't.
> > I'll have to go back and carefully check the situation again with .cpp  
> > and
> > .c sources.
>
> Ok, what I was getting at was if you have a specific example file that
> shows the error, because any example I created doesn't give me an
> error.
>
> > Are you using Octave 3.6.4?
>
> I tried with 3.6.4 (with the mexproto include moved as you noted) and
> with the current development version, both worked with no error. I
> don't work with mex files routinely, I just tried to see if I could
> reproduce your error.

OK, I don't normally work with mex files either, but have been revisiting  
some code I worked with a couple of years ago, Matlab code provided by  
others, and didn't have any problems compiling the xxx.c or the xxx.cpp  
files at that time. Trying to rebuild working code from my source archive,  
I now run into problems.
Below is a bit of a story of what I have been able to establish, hope it  
is understandable.

using mex.h as follows...

------------------
#if defined (__cplusplus)
#include "mexproto.h"  /*TLD 8-10-2013*/
extern "C" {
#endif

#if defined (V4)
void mexFunction (int nlhs, mxArray* plhs[], int nrhs, mxArray *prhs[]);
#else
void mexFunction (int nlhs, mxArray* plhs[], int nrhs, const mxArray  
*prhs[]);
#endif

/*#include "mexproto.h"*/

/* V4 floating point routines renamed in V5.  */
-----------------

errors compiling apply_blur_kernel_mex.c, but no errors compiling another  
version (apply_blur_kernel_mex.cpp in different set of code)

apply_blur_kernel_mex.c:87:62: error: ‘mxDOUBLE_CLASS’ undeclared (first  
use in this function)
     imblurry_ptr = mxCreateNumericArray(3, full_dims_blurry,  
mxDOUBLE_CLASS, mxREAL);
                                                              ^
apply_blur_kernel_mex.c:87:62: note: each undeclared identifier is  
reported only once for each function it appears in
apply_blur_kernel_mex.c:87:78: error: ‘mxREAL’ undeclared (first use in  
this function)
     imblurry_ptr = mxCreateNumericArray(3, full_dims_blurry,  
mxDOUBLE_CLASS, mxREAL);
                                                                              ^
apply_blur_kernel_mex.c:88:14: warning: assignment makes pointer from  
integer without a cast [enabled by default]
     imblurry = mxGetPr(imblurry_ptr);
              ^
apply_blur_kernel_mex.c:95:16: warning: implicit declaration of function  
‘mexErrMsgTxt’ [-Wimplicit-function-declaration]
                mexErrMsgTxt("theta not integral for uniform blur");
                ^
apply_blur_kernel_mex.c:107:22: error: ‘mwIndex’ undeclared (first use in  
this function)
                 i = (mwIndex)((xi-1)*h_blurry + yi - 1);
                      ^

with mex.h as follows (essentially the std mex.h in 3.6.4), no errors  
compiling apply_blur_kernel_mex.c but errors (in original post) compiling  
apply_blur_kernel_mex.cpp

-------------------
#if defined (__cplusplus)
/* #include "mexproto.h"  TLD 8-10-2013*/
extern "C" {
#endif

#if defined (V4)
void mexFunction (int nlhs, mxArray* plhs[], int nrhs, mxArray *prhs[]);
#else
void mexFunction (int nlhs, mxArray* plhs[], int nrhs, const mxArray  
*prhs[]);
#endif

#include "mexproto.h"

/* V4 floating point routines renamed in V5.  */
----------------------

Just to be clear, I am working with Octave 3.6.4 from the Fedora 19 repo  
(x86_64 version).
Fedora 19 uses gcc-4.8.1-1.fc19.x86_64.

What version of GCC are you using.

Hope this throws a bit more light on my problem.

Cheers,
--
Regards,
Terry Duell