Error Compiling Qt Source - qt

Question

I have looked all around for a solution to this problem with no avail. When compiling Qt, it runs fine for about 60 seconds until I get this and it kicks me out:
In file included from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\cmath:44:0,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\random:38,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\stl_algo.h
:65,
from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\algorithm:62,
from ..\..\..\include/QtCore/../../src/corelib/global/qglobal.h
:89,
from ..\..\..\include/QtCore/qglobal.h:1,
from ..\..\..\include/QtCore/../../src/corelib/tools/qalgorithm
s.h:45,
from ..\..\..\include/QtCore/qalgorithms.h:1,
from ..\..\..\include/QtCore/../../src/corelib/tools/qvector.h:
45,
from ..\..\..\include/QtCore/qvector.h:1,
from ..\..\..\include\QtCore/../../src/corelib/tools/qstack.h:4
5,
from ..\..\..\include\QtCore/qstack.h:1,
from parser.h:45,
from moc.h:45,
from moc.cpp:42:
c:\mingw\include\math.h: In function 'float hypotf(float, float)':
c:\mingw\include\math.h:635:30: error: '_hypot' was not declared in this scope
{ return (float)(_hypot (x, y)); }
^
Makefile.Release:307: recipe for target '.obj/release/moc.o' failed
mingw32-make[4]: *** [.obj/release/moc.o] Error 1
mingw32-make[4]: Leaving directory 'C:/Qt/QtS/qtbase/src/tools/moc'
Makefile:34: recipe for target 'release' failed
mingw32-make[3]: *** [release] Error 2
mingw32-make[3]: Leaving directory 'C:/Qt/QtS/qtbase/src/tools/moc'
Makefile:82: recipe for target 'sub-moc-make_first' failed
mingw32-make[2]: *** [sub-moc-make_first] Error 2
mingw32-make[2]: Leaving directory 'C:/Qt/QtS/qtbase/src'
Makefile:41: recipe for target 'sub-src-make_first' failed
mingw32-make[1]: *** [sub-src-make_first] Error 2
mingw32-make[1]: Leaving directory 'C:/Qt/QtS/qtbase'
Makefile:63: recipe for target 'module-qtbase-make_first' failed
mingw32-make: *** [module-qtbase-make_first] Error 2
C:\Qt\QtS>
I am compiling using MinGW, and this is my first experience with compiling source really so I'm stumped on what to do.

Answer 1

If you Google a bit for error: '_hypot' was not declared in this scope you will find several reports from several different projects. Looks like a MinGW bug. Not too much you can do, if this is true.
Do you really need a 32bit Qt? According to Google at least one 64bit MinGW does not have this bug.
I would try it. Perhaps you find a newer MinGW version?
http://mingw-w64.yaxm.org/doku.php
EDIT:
Just found: https://wiki.qt.io/MinGW
There are binary installers targetting MinGW for both Qt 4 and Qt 5.
Up to Qt 4.8.6, Qt 4 ones are built with a MinGW.org toolchain using
gcc 4.4. Newer Qt 4.8 binary packages ship with a mingw-w64 based
toolchain. For Qt 5, a newer MinGW-w64 toolchain is actually required.