Antonio,
I already tried that, I get this error.
┌────────────────────────────────────────────────────────────────────────────┐
?FiveWin for Harbour 15.01 and GCC - Jan. 2015 Harbour development power │▄
?(c) FiveTech, 1993-2015 for Microsoft Windows 9X/NT/200X/ME/XP/Vista/7/8 │█
└────────────────────────────────────────────────────────────────────────────┘?
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Compiling...
xHarbour 1.2.3 Intl. (SimpLex) (Build 20160314)
Copyright 1999-2015,
http://www.xharbour.org http://www.harbour-project.org/
Compiling 'helloworld.prg' and generating preprocessed output to 'helloworld.ppo
'...
Generating C source output to 'helloworld.c'...
Done.
Lines 5, Functions/Procedures 1, pCodes 7
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbcommon
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbcpage
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbcplr
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbct
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbdebug
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbhsx
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhblang
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbmacro
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbmainstd
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbpcre
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbpp
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbrdd
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbrtl
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbtip
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbusrrdd
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbvm
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbwin
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lhbzlib
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lrddcdx
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lrddfpt
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lrddntx
C:/XharbourWithMingwTestProgram/mingw530/MINGW530/bin/../lib/gcc/i686-w64-mingw3
2/5.3.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lxhb
collect2.exe: error: ld returned 1 exit status
* Link errors *
C:\XharbourWithMingwTestProgram>
But maybe this error is closer to the solution.
Pieter