Can't compile with gcc-7

I am trying to compile some code with GCC-7 on MacOS Catalina. The GCC-7 was installed using homebrew brew install gcc@7

The code is the following:

#include <stdlib.h>
#include <math.h>


double distance(double *a, double *b, int d) {
    double dist = 0;
    for(int i = 0; i < d; i++) {
        dist += pow(a[i]-b[i],2);
    }
    return sqrt(dist);
}


double *computeDistances (double *X, int n, int d) {
   double *dist = malloc( (n-1) * sizeof(double) );
   double *vp = X + (n-1)*d;
     for(int i = 0; i < n-1; i++) {
   dist[i] = distance(&(X[IDX(d,i,0)]), vp, d);
  }
  return dist;
}

I'm compiling with gcc-7 -Iinc/ -o lib/test.o -c src/test.c

and the output is:

In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/wait.h:110:0,
                 from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:66,
                 from src/test.c:1:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/resource.h: In function 'getiopolicy_np':
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/resource.h:443:34: error: expected declaration specifiers before '__OSX_AVAILABLE_STARTING'
 int     getiopolicy_np(int, int) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
                                  ^~~~~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/resource.h:449:39: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__OSX_AVAILABLE_STARTING'
 int     setiopolicy_np(int, int, int) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
                                       ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libkern/_OSByteOrder.h:66:0,
                 from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/_endian.h:130,
                 from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/i386/endian.h:99,
                 from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/machine/endian.h:35,
                 from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/wait.h:186,
                 from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:66,

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/resource.h:443:1: error: parameter name omitted
src/test.c:21:1: error: expected '{' at end of input
 }
 ^

Where I do not include stdlib.h it works. I think there's something wrong in the header files.