CODEWITHSUNDEEP
matlabgccmex
Shafiul
Shafiul

Reputation: 2890

Matlab mex can not build but gcc can

I'm new to Matlab and was trying to build a C file. The code gets compiled fine with gcc (4.8.4 in 64-bit Ubuntu). But when I try to build with mex, it shows following error:

error: exponent has no digits

I'm not sure what I'm doing wrong. The error is in this file. Complete error log is here.

When I compile the code using gcc, there are no errors. I do not provide any special arguments to gcc. To my knowledge, mex is using gcc so I do not understand why mex is failing to build the code.

I've little knowledge of C programming and any help is highly appreciated!

Edit:

To clarify more, I've got the source in two files:

When I said I can build using gcc, I just built File 1 with this command: gcc file1.c -o file1. I think not building File 2 with gcc has no impact here in my question, as only File 1 uses those functions from the file which mex can not build.

I used this command from Matlab mex file2.c to build and got the error.

Upvotes: 1

Views: 147

Answers (1)

chappjc
chappjc

Reputation: 30579

For C code, you probably need to enable GNU extensions for C99 (-std=gnu99). As described in my previous post on enabling C99, to pass this to mex:

mex -v -largeArrayDims CFLAGS="\$CFLAGS -std=gnu99" mexSouce.c

The reason the default does not work is because mex likes to choose the ANSI standard, which is often not the newest.

Upvotes: 1

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