Salve a tutti, intanto chiedo scusa ad alka per l'ultimo 3d che mi ha dovuto chiudere... 
Stavo provando ad utilizzare la libusb-win32, ma la dll che foniscono sul sito non mi funziona con le QT e quindi la devo ricompilare con mingw... purtroppo qui sorgono i problemi: in pratica scompatto i sorgenti dentro alla cartella C:/LibUSB-Win32 e da li faccio mingw32-make... inizia la compilazione fino a quando non da questi errori (scusate la lunghezza, ma preferisco riportare tutto l'errore):
codice:
C:\LIBUSB~1>mingw32-make
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"libusb0-dll\" -DTARGETTYPE=DYNLINK
-c ./src/usb.c -o usb.2.o -I./src -I./src/driver -I.
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"libusb0-dll\" -DTARGETTYPE=DYNLINK
-c ./src/error.c -o error.2.o -I./src -I./src/driver -I.
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"libusb0-dll\" -DTARGETTYPE=DYNLINK
-c ./src/descriptors.c -o descriptors.2.o -I./src -I./src/driver -I.
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"libusb0-dll\" -DTARGETTYPE=DYNLINK
-c ./src/windows.c -o windows.2.o -I./src -I./src/driver -I.
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"libusb0-dll\" -DTARGETTYPE=DYNLINK
-c ./src/install.c -o install.2.o -I./src -I./src/driver -I.
./src/install.c:319: warning: 'gdi32_dll' defined but not used
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"libusb0-dll\" -DTARGETTYPE=DYNLINK
-c ./src/registry.c -o registry.2.o -I./src -I./src/driver -I.
./src/registry.c: In function 'usb_registry_get_property':
./src/registry.c:94: warning: unused variable 'reg_key'
./src/registry.c:93: warning: unused variable 'p'
./src/registry.c: In function 'usb_registry_get_mz_value':
./src/registry.c:874: warning: pointer targets in passing argument 5 of 'RegQuer
yValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_set_mz_value':
./src/registry.c:931: warning: pointer targets in passing argument 5 of 'RegSetV
alueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:108: no
te: expected 'const BYTE *' but argument is of type 'char *'
./src/registry.c:939: warning: pointer targets in passing argument 5 of 'RegSetV
alueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:108: no
te: expected 'const BYTE *' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_get_all_class_keys':
./src/registry.c:1435: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_lookup_class_keys_by_name':
./src/registry.c:1498: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_get_class_filter_keys':
./src/registry.c:1640: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c:1646: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
windres -I./src ./src/resource.rc -o resource.2.o
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"libusb0-dll\" -DTARGETTYPE=DYNLINK
-o libusb0.dll -I./src usb.2.o error.2.o descriptors.2.o windows.2.o install.2
.o registry.2.o resource.2.o libusb0.def -s -mdll -Wl,--kill-at -Wl,--out-implib
,libusb.a -Wl,--enable-stdcall-fixup -L. -lcfgmgr32 -lsetupapi -lgdi32
Creating library file: libusb.a
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"install-filter\" -DTARGETTYPE=PROG
RAMconsole -DLOG_STYLE_SHORT -c ./src/install_filter.c -o install_filter.1.o -I
./src -I./src/driver -I.
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"install-filter\" -DTARGETTYPE=PROG
RAMconsole -DLOG_STYLE_SHORT -c ./src/error.c -o error.1.o -I./src -I./src/driv
er -I.
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"install-filter\" -DTARGETTYPE=PROG
RAMconsole -DLOG_STYLE_SHORT -c ./src/install.c -o install.1.o -I./src -I./src/
driver -I.
./src/install.c:319: warning: 'gdi32_dll' defined but not used
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"install-filter\" -DTARGETTYPE=PROG
RAMconsole -DLOG_STYLE_SHORT -c ./src/registry.c -o registry.1.o -I./src -I./sr
c/driver -I.
./src/registry.c: In function 'usb_registry_get_property':
./src/registry.c:94: warning: unused variable 'reg_key'
./src/registry.c:93: warning: unused variable 'p'
./src/registry.c: In function 'usb_registry_get_mz_value':
./src/registry.c:874: warning: pointer targets in passing argument 5 of 'RegQuer
yValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_set_mz_value':
./src/registry.c:931: warning: pointer targets in passing argument 5 of 'RegSetV
alueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:108: no
te: expected 'const BYTE *' but argument is of type 'char *'
./src/registry.c:939: warning: pointer targets in passing argument 5 of 'RegSetV
alueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:108: no
te: expected 'const BYTE *' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_get_all_class_keys':
./src/registry.c:1435: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_lookup_class_keys_by_name':
./src/registry.c:1498: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c: In function 'usb_registry_get_class_filter_keys':
./src/registry.c:1640: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
./src/registry.c:1646: warning: pointer targets in passing argument 5 of 'RegQue
ryValueExA' differ in signedness
c:\qtsdk\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/winreg.h:97: not
e: expected 'LPBYTE' but argument is of type 'char *'
windres -I./src ./src/install_filter_rc.rc -o install_filter_rc.1.o
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"install-filter\" -DTARGETTYPE=PROG
RAMconsole -DLOG_STYLE_SHORT -o install-filter.exe -I./src install_filter.1.o e
rror.1.o install.1.o registry.1.o install_filter_rc.1.o -s -L. -lgdi32 -luser32
-lcfgmgr32 -lsetupapi
gcc -c projects/additional/libwdi/libwdi/installer.c -o projects/additional/libw
di/libwdi/installer.6.o -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"installer_x86\
" -DTARGETTYPE=PROGRAMconsole -DWDF_VER=\"01009\" -DUSER_DIR=\"\" -DOPT_M32 -DWI
NVER=0x500 -DWINVER=0x500 -I./projects/additional/libwdi/libwdi
gcc -O2 -Wall -DWINVER=0x500 -DLOG_APPNAME=\"installer_x86\" -DTARGETTYPE=PROGR
AMconsole -DWDF_VER=\"01009\" -DUSER_DIR=\"\" -DOPT_M32 -DWINVER=0x500 -o instal
ler_x86.exe -I./projects/additional/libwdi/libwdi projects/additional/libwdi/li
bwdi/installer.6.o -s -L. -ladvapi32 -lnewdev -lsetupapi
cp ./projects/additional/libwdi/libwdi/../msvc/config.h ./projects/additional/li
bwdi/libwdi
process_begin: CreateProcess(NULL, cp ./projects/additional/libwdi/libwdi/../msv
c/config.h ./projects/additional/libwdi/libwdi, ...) failed.
make (e=2): Impossibile trovare il file specificato.
mingw32-make: *** [installer_x86.exe] Error 2
qualcuno mi può aiutare a capire dov'è l'inghippo???
io non so più quello che fare!
Ciao
Marco