having errors when compile .cc file to mex in Matlab - matlab

Question

I am trying to complie a .cc file to mex, and I am using mex filename command in Matlab. My complier is [1] Lcc-win32 C 2.4.1 in C:\PROGRA~1\MATLAB\R2012b\sys\lcc .
However, there are some errors:
lcc preprocessor error: learn.cc:5 Could not find include file <sys/time.h>
Error learn.cc: 70 illegal statement termination
Error learn.cc: 70 skipping `int'
Error learn.cc: 70 undeclared identifier `alen'
Error learn.cc: 71 illegal statement termination
Error learn.cc: 71 skipping `int'
Error learn.cc: 71 undeclared identifier `blen'
Error learn.cc: 87 invalid struct field declarations
Error learn.cc: 87 syntax error; found `collapsed' expecting `}'
Error learn.cc: 87 skipping `collapsed' `*' `x'
Error learn.cc: 93 unrecognized declaration
Warning learn.cc: 93 empty declaration
Error learn.cc: 97 undefined size for `incomplete struct timeval defined at learn.cc 97 tp'
Error learn.cc: 99 unknown field `tv_usec' of `incomplete struct timeval defined at learn.cc 97'
Error learn.cc: 102 syntax error; found `double' expecting `;'
Error learn.cc: 103 syntax error; found `double' expecting `;'
Error learn.cc: 106 missing parameter type
Error learn.cc: 106 syntax error; found `X' expecting `)'
Error learn.cc: 106 skipping `X' `,'
Error learn.cc: 106 syntax error; found `double' expecting `{'
Error learn.cc: 106 missing identifier
Error learn.cc: 106 too many errors
I guess the reason for the first error is that there is no time.h file in the sys folder. Instead there is timeb.h file. But I don't know the reason to the following errors.
Here are some relative codes:
line 70 int alen = **((int **)a);
line 71 int blen = **((int **)b);
line 86-93 struct data {
collapsed *x;
int num;
int numblocks;
int *blocksizes;
float *regmult;
float *learnmult;
};
line 96-100 void seed_time() {
struct timeval tp;
check(gettimeofday(&tp, NULL) == 0);
srand48((long)tp.tv_usec);
}
line 102 static inline double min(double x, double y) { return (x <= y ? x : y); }
line 103 static inline double max(double x, double y) { return (x <= y ? y : x); }
Can anyone give me a hint?

Answer 1

As far as i can tell, there is nothing wrong with lines 70,71. Are a,b integer double arrays declared and allocated with something like:
int ** a = malloc(4 * sizeof(int*) );
for (int var = 0; var < 4; ++var) {
a[var] = malloc(3*sizeof(int));
}
?
Are you sure that the sys/time.h file can be replaced by sys/timeb.h file? Have you tried?
sys/time.h looks like a pretty linux/unix specific file. Are you sure that the sys/ folder refers to your matlab sys directory (C:\PROGRA~1\MATLAB\R2012b\sys\lcc)?
In general, it looks like you are trying to compile a linux .mex file on a windows machine. For example gettimeofday is a linux pure call (according to this answer):
Equivalent of gettimeday() for Windows