then
AC_CHECK_HEADERS([usb.h],[],
[AC_MSG_ERROR([usb.h is required to build some OpenOCD driver(s)])])
+ build_usb=yes
fi
AM_CONDITIONAL(RELEASE, test $build_release = yes)
AM_CONDITIONAL(VSLLINK, test $build_vsllink = yes)
AM_CONDITIONAL(RLINK, test $build_rlink = yes)
AM_CONDITIONAL(ARMJTAGEW, test $build_armjtagew = yes)
+AM_CONDITIONAL(USB, test $build_usb = yes)
AM_CONDITIONAL(IS_CYGWIN, test $is_cygwin = yes)
AM_CONDITIONAL(IS_MINGW, test $is_mingw = yes)
AM_CONDITIONAL(IS_WIN32, test $is_win32 = yes)