Fix parallel build

This patch is a partial backport of
https://github.com/libusb/libusb/commit/3dc781ce3ecd0315cfc0b4fdcef9e062990f289b

Signed-off-by: Jeroen Roovers <jer@airfi.aero>

--- a/configure.ac
+++ b/configure.ac
@@ -36,6 +36,7 @@ m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RU
 
 AC_PREREQ([2.50])
 AC_PROG_CC
+AC_PROG_CXX
 LT_INIT
 LT_LANG([Windows Resource])
 AC_C_INLINE
@@ -91,7 +92,6 @@ case $host in
 	;;
 *-haiku*)
 	AC_MSG_RESULT([Haiku])
-	AC_CONFIG_SUBDIRS([libusb/os/haiku])
 	backend="haiku"
 	threads="posix"
 	;;
@@ -193,6 +193,7 @@ AM_CONDITIONAL(OS_HAIKU, test "x$backend
 AM_CONDITIONAL(THREADS_POSIX, test "x$threads" = xposix)
 AM_CONDITIONAL(CREATE_IMPORT_LIB, test "x$create_import_lib" = "xyes")
 AM_CONDITIONAL(USE_UDEV, test "x$enable_udev" = xyes)
+AM_CONDITIONAL(USE_USBDK, test "x$enable_usbdk" = xyes)
 if test "$threads" = posix; then
 	AC_DEFINE(THREADS_POSIX, 1, [Use POSIX Threads])
 fi
--- a/libusb/Makefile.am
+++ b/libusb/Makefile.am
@@ -4,58 +4,66 @@ AUTOMAKE_OPTIONS = subdir-objects
 
 lib_LTLIBRARIES = libusb-1.0.la
 
-POSIX_POLL_SRC = os/poll_posix.c
-LINUX_USBFS_SRC = os/linux_usbfs.c
-DARWIN_USB_SRC = os/darwin_usb.c
+POSIX_POLL_SRC = os/poll_posix.h os/poll_posix.c
+POSIX_THREADS_SRC = os/threads_posix.h os/threads_posix.c
+WINDOWS_POLL_SRC = os/poll_windows.h os/poll_windows.c
+WINDOWS_THREADS_SRC = os/threads_windows.h os/threads_windows.c
+LINUX_USBFS_SRC = os/linux_usbfs.h os/linux_usbfs.c
+DARWIN_USB_SRC = os/darwin_usb.h os/darwin_usb.c
 OPENBSD_USB_SRC = os/openbsd_usb.c
 NETBSD_USB_SRC = os/netbsd_usb.c
-WINDOWS_USB_SRC = os/poll_windows.c os/windows_usb.c libusb-1.0.rc libusb-1.0.def
-WINCE_USB_SRC = os/wince_usb.c os/wince_usb.h
-
-DIST_SUBDIRS = 
-
-EXTRA_DIST = $(LINUX_USBFS_SRC) $(DARWIN_USB_SRC) $(OPENBSD_USB_SRC) \
-	$(NETBSD_USB_SRC) $(WINDOWS_USB_SRC) $(WINCE_USB_SRC) \
-	$(POSIX_POLL_SRC) \
-	os/threads_posix.c os/threads_windows.c \
+WINDOWS_COMMON_SRC = os/windows_nt_common.h os/windows_nt_common.c \
+                     os/windows_common.h libusb-1.0.rc libusb-1.0.def
+WINDOWS_USB_SRC = os/windows_winusb.h os/windows_winusb.c
+WINDOWS_USBDK_SRC = os/windows_usbdk.h os/windows_usbdk.c
+WINCE_USB_SRC = os/wince_usb.h os/wince_usb.c
+HAIKU_USB_SRC = os/haiku_usb.h os/haiku_usb_backend.cpp \
+		os/haiku_usb_raw.h os/haiku_usb_raw.cpp os/haiku_pollfs.cpp
+
+EXTRA_DIST = $(POSIX_POLL_SRC) $(POSIX_THREADS_SRC) \
+	$(WINDOWS_POLL_SRC) $(WINDOWS_THREADS_SRC) \
+	$(LINUX_USBFS_SRC) $(DARWIN_USB_SRC) \
+	$(OPENBSD_USB_SRC) $(NETBSD_USB_SRC) \
+	$(WINDOWS_COMMON_SRC) $(WINDOWS_USB_SRC) $(WINDOWS_USBDK_SRC) \
+        $(WINCE_USB_SRC) $(HAIKU_USB_SRC) \
 	os/linux_udev.c os/linux_netlink.c
 
-dist-hook:
-	cp -r os/haiku $(distdir)/os/haiku
-	rm -rf $(distdir)/os/haiku/autom4te.cache
-
 if OS_LINUX
 
 if USE_UDEV
-OS_SRC = $(LINUX_USBFS_SRC) $(POSIX_POLL_SRC) \
-	os/linux_udev.c
+OS_SRC = $(LINUX_USBFS_SRC) os/linux_udev.c
 else
-OS_SRC = $(LINUX_USBFS_SRC) $(POSIX_POLL_SRC) \
-	os/linux_netlink.c
+OS_SRC = $(LINUX_USBFS_SRC) os/linux_netlink.c
 endif
 
 endif
 
 if OS_DARWIN
-OS_SRC = $(DARWIN_USB_SRC) $(POSIX_POLL_SRC)
+OS_SRC = $(DARWIN_USB_SRC)
 AM_CFLAGS_EXT = -no-cpp-precomp
 endif
 
 if OS_OPENBSD
-OS_SRC = $(OPENBSD_USB_SRC) $(POSIX_POLL_SRC)
+OS_SRC = $(OPENBSD_USB_SRC)
 endif
 
 if OS_NETBSD
-OS_SRC = $(NETBSD_USB_SRC) $(POSIX_POLL_SRC)
+OS_SRC = $(NETBSD_USB_SRC)
 endif
 
 if OS_HAIKU
-OS_SRC = $(POSIX_POLL_SRC)
-SUBDIRS = os/haiku
+noinst_LTLIBRARIES = libusb_haiku.la
+libusb_haiku_la_SOURCES = $(HAIKU_USB_SRC)
+libusb_1_0_la_LIBADD = libusb_haiku.la
 endif
 
 if OS_WINDOWS
-OS_SRC = $(WINDOWS_USB_SRC)
+
+if USE_USBDK
+OS_SRC = $(WINDOWS_USBDK_SRC) $(WINDOWS_COMMON_SRC)
+else
+OS_SRC = $(WINDOWS_USB_SRC) $(WINDOWS_COMMON_SRC)
+endif
 
 .rc.lo:
 	$(AM_V_GEN)$(LIBTOOL) $(AM_V_lt) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --tag=RC --mode=compile $(RC) $(RCFLAGS) -i $< -o $@
@@ -69,22 +77,23 @@ if CREATE_IMPORT_LIB
 	$(AM_V_GEN)$(DLLTOOL) $(DLLTOOLFLAGS) --kill-at --input-def $(srcdir)/libusb-1.0.def --dllname $@ --output-lib .libs/$@.a
 endif
 
+if OS_WINDOWS
+POLL_SRC = $(WINDOWS_POLL_SRC)
+else
+POLL_SRC = $(POSIX_POLL_SRC)
+endif
+
 if THREADS_POSIX
-THREADS_SRC = os/threads_posix.h os/threads_posix.c
+THREADS_SRC = $(POSIX_THREADS_SRC)
 else
-THREADS_SRC = os/threads_windows.h os/threads_windows.c
+THREADS_SRC = $(WINDOWS_THREADS_SRC)
 endif
 
 libusb_1_0_la_CFLAGS = $(AM_CFLAGS)
 libusb_1_0_la_LDFLAGS = $(LTLDFLAGS)
-libusb_1_0_la_SOURCES = libusbi.h core.c descriptor.c io.c strerror.c sync.c \
-	os/linux_usbfs.h os/darwin_usb.h os/windows_usb.h os/windows_common.h \
-	hotplug.h hotplug.c $(THREADS_SRC) $(OS_SRC) \
-	os/poll_posix.h os/poll_windows.h
-
-if OS_HAIKU
-libusb_1_0_la_LIBADD = os/haiku/libhaikuusb.la
-endif
+libusb_1_0_la_SOURCES = libusbi.h libusb.h version.h version_nano.h \
+	core.c descriptor.c hotplug.h hotplug.c io.c strerror.c sync.c \
+	$(POLL_SRC) $(THREADS_SRC) $(OS_SRC)
 
 hdrdir = $(includedir)/libusb-1.0
 hdr_HEADERS = libusb.h