How to fix an error during compiling:_mingw.h

[TiagoPereira]

Dear all,

I just have written my very first C code, and, as everybody else, got an error during compiling.

on terminal (linux, ubuntu):

gcc hwe.c -lm hwe
gcc: hwe: No such file or directory
In file included from hwe.c:2:
/usr/include/math.h:31:20: error: _mingw.h: No such file or directory


I believe that is something related to the math.h library. How do I fix that?

I will be really grateful for any tips.

Tiago

The code is a very simple statistical test used in genetics:

#include <stdio.h>
#include <math.h>

int x, n;
float f_A;
float chi2 = 0;
int genotype[4];
int expected[4];


int main(void)
{
	for (x = 1; x <= 3 ; x++)
	
	{
		printf("Enter a count:");
		scanf("%d" , &genotype[x]);
				
	}
	
	
	n = genotype[1]+genotype[2]+genotype[3];
	f_A = ((2*genotype[1])+(genotype[2]))/(n*2);
	expected[1] = pow(f_A,2)*n;
	expected[2] = 2*(f_A)*(1-f_A)*n;
	expected[3] = pow(1-f_A,2)*n;
	
	for (x = 1; x <= 3; x++)
	{	
	chi2 = chi2 + (pow((genotype[x]-expected[x]),2)/(expected[x]));
	}
	
	

	printf("The chi2 value is: %f", chi2);
	
	return 0;
}

[Bayint Naung]

An Introduction to GCC - Compiling a simple C program

[TiagoPereira]

Thanks, but the same error still remains I speak R and Stata. So, I am very used to lists. Before posting a question, it stands to logic that I google around the problem.

[TiagoPereira]

tiago@tiago-laptop:~/Desktop$ head hwe.c
#include <stdio.h>
#include <math.h>

int x, n;
float f_A;
float chi2 = 0;
int genotype[4];
int expected[4];


tiago@tiago-laptop:~/Desktop$ gcc -Wall hwe.c -lm hwe
gcc: hwe: No such file or directory
In file included from hwe.c:2:
/usr/include/math.h:31:20: error: _mingw.h: No such file or directory
tiago@tiago-laptop:~/Desktop$ ^C
tiago@tiago-laptop:~/Desktop$ gcc -Wall hwe.c -o hwe
In file included from hwe.c:2:
/usr/include/math.h:31:20: error: _mingw.h: No such file or directory
tiago@tiago-laptop:~/Desktop$

[User Name:]

Try:
gcc hwe.c -lm -o hwe
Should fix:
gcc: hwe: No such file or directory

idk about the rest.

[jdragyn]

In file included from hwe.c:2:
/usr/include/math.h:31:20: error: _mingw.h: No such file or directory

This is telling you that the _mingw.h file, which is #included in math.h (which YOU #include in your hwe.c source file) does not exist. This suggests a problem with your MinGW installation. My personal first step would be to re-install MinGW. If that doesn't fix it, someone here might be able to help, but the Ubuntu forums will also probably help, too.

gcc: hwe: No such file or directory

is complaining about "hwe" on the command line. That token is being interpreted by gcc as an input file, but it can't find the file. Anything not preceded by a - on the gcc command line is assumed to be an input file. User Name:'s advice tells gcc (through the -o) that hwe is the name of the output file.

[TiagoPereira]

Many, many thanks! Your tips were really helpful, guys!

I have installed all libraries (MingGW), updated the built-essential, etc.. etc... without success, however. Then, I solved the problem using a very dirty strategy:

I have copied the contents of the /usr/include/ from a PC where that compiling error doesn't show up to my laptop. Then, typing

gcc hwe.c -lm -o hwe

worked like a charm!

Thanks again!

Tiago