Compiling c program with MinGW causes cc1.exe fatal error - c

Question

I installed MinGW-w64 using win-builds.
It all went ok but then when I compile a file using
gcc -Wall -o prog.exe main.c
I get this error
cc1.exe: fatal error: Files/win-builds-1.5.0/include: No such file or directory
compilation terminated.
I have updated gcc path. I get the same error when I try to build on eclipse.
The location where win-builds put all the files is C:\Program Files\win-builds-1.5.0\ and the folder \include\ exists.
My guess is that cc1.exe is trying to access C:\Program Files\win-builds-1.5.0\include but, for some reason it is separating C:\Program of Files\win-builds-1.5.0\include.
How can I get the compiler to work?
EDIT:
Here is the code to be compiled
/*
* main.c
*
* Created on: 13/06/2018
* Author: haslima
*/
#include <stdio.h>
int main()
{
printf("Hello World");
return 1;
}
EDIT:
when I run gcc -v -c -o prog.exe main.c I get this output:
Reading specs from c:/program files/win-builds-1.5.0/bin/../lib64/gcc/x86_64-w64-mingw32/4.8.3/specs
COLLECT_GCC=gcc
Target: x86_64-w64-mingw32
Configured with: ../gcc-4.8.3/configure --prefix=/opt/windows_64 --with-sysroot=/opt/windows_64 --libdir=/opt/windows_64/lib64 --mandir=/opt/windows_64/man --infodir=/opt/windows_64/info --enable-shared --disable-bootstrap --disable-multilib --enable-threads=posix --enable-languages=c,c++ --enable-checking=release --enable-libgomp --with-system-zlib --with-python-dir=/lib64/python2.7/site-packages --disable-libunwind-exceptions --enable-__cxa_atexit --enable-libssp --with-gnu-ld --verbose --enable-java-home --with-java-home=/opt/windows_64/lib64/jvm/jre --with-jvm-root-dir=/opt/windows_64/lib64/jvm --with-jvm-jar-dir=/opt/windows_64/lib64/jvm/jvm-exports --with-arch-directory=amd64 --with-antlr-jar='/home/adrien/projects/win-builds-1.5/slackware64-current/d/gcc/antlr-*.jar' --disable-java-awt --disable-gtktest --build=x86_64-slackware-linux --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
Thread model: posix
gcc version 4.8.3 (GCC)
COLLECT_GCC_OPTIONS='-v' '-c' '-o' 'prog.exe' '-mtune=generic' '-march=x86-64'
c:/program files/win-builds-1.5.0/bin/../libexec/gcc/x86_64-w64-mingw32/4.8.3/cc1.exe -quiet -v -iprefix c:\program files\win-builds-1.5.0\bin\../lib64/gcc/x86_64-w64-mingw32/4.8.3/ -D_REENTRANT -IC:/Program Files/win-builds-1.5.0/include main.c -quiet -dumpbase main.c -mtune=generic -march=x86-64 -auxbase-strip prog.exe -version -o C:\Users\hasli\AppData\Local\Temp\ccnpAzB7.s
GNU C (GCC) version 4.8.3 (x86_64-w64-mingw32)
compiled by GNU C version 4.8.3, GMP version 5.1.3, MPFR version 3.1.2, MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "c:/program files/win-builds-1.5.0/lib64/gcc/../../lib64/gcc/x86_64-w64-mingw32/4.8.3/include"
ignoring nonexistent directory "/opt/windows_64/opt/windows_64/lib64/gcc/x86_64-w64-mingw32/4.8.3/../../../../include"
ignoring duplicate directory "c:/program files/win-builds-1.5.0/lib64/gcc/../../lib64/gcc/x86_64-w64-mingw32/4.8.3/include-fixed"
ignoring duplicate directory "c:/program files/win-builds-1.5.0/lib64/gcc/../../lib64/gcc/x86_64-w64-mingw32/4.8.3/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory "/opt/windows_64/mingw/include"
ignoring nonexistent directory "C:/Program"
#include "..." search starts here:
#include <...> search starts here:
c:\program files\win-builds-1.5.0\bin\../lib64/gcc/x86_64-w64-mingw32/4.8.3/include
c:\program files\win-builds-1.5.0\bin\../lib64/gcc/x86_64-w64-mingw32/4.8.3/include-fixed
c:\program files\win-builds-1.5.0\bin\../lib64/gcc/x86_64-w64-mingw32/4.8.3/../../../../x86_64-w64-mingw32/include
End of search list.
cc1.exe: fatal error: Files/win-builds-1.5.0/include: No such file or directory
compilation terminated.

Answer 1

From [MinGW]: Getting Started (including bolds):
MinGW may have problems with paths containing spaces, and if not, usually other programs used with MinGW will experience problems with such paths. Thus, we strongly recommend that you do not install MinGW in any location with spaces in the path name reference. You should avoid installing into any directory or subdirectory having names like "Program Files" or "My Documents", etc.
So, the solution is pretty straightforward:
Uninstall your current version (might not be necessary, but there's no point keeping something broken)
Make sure to read all installation requirements / notes
Install it in a SPACE free dir
I should have thought of this sooner, as I don't install stuff in default dirs (e.g. I have MinGW installed in "f:\Install\pc064\MinGW\MinGW-W64\x86_64-8.1.0-posix-seh-rt_v6-rev0").