libusbok=no
have_libusb1=no
+ LIBUSB_PKG_CONFIG_NAME=''
if test x$1 = xyes; then
PKG_CHECK_MODULES(USB, libusb-1.0, [
libusbok=yes
usb_header='libusb-1.0/libusb.h'
usb_lib_func='libusb_bulk_transfer'
usb_lib_name='usb-1.0'
+ LIBUSB_PKG_CONFIG_NAME='libusb-1.0'
])
- fi
- if test $libusbok = no; then
- dnl not using libusb1, or PKGCONFIG check for libusb1 failed;
- dnl see if legacy version is found.
+ else
+ dnl not using libusb1 (for now); see if legacy version is found.
dnl it might be installed under the name either 'libusb' or
- dnl 'libusb-legacy'. check them in that order.
+ dnl 'libusb-legacy', or just available via the
+ dnl user's shell environment
dnl see if the pkgconfig module 'libusb' is available
- PKG_CHECK_MODULES(USB, libusb, [libusbok=yes], [libusbok=no])
+ PKG_CHECK_MODULES(USB, libusb, [
+ libusbok=yes
+ LIBUSB_PKG_CONFIG_NAME='libusb'
+ ], [libusbok=no])
dnl PKG_CHECK_MODULES does not work correctly when embedded
if test $libusbok = no; then
dnl if not, see if the pkgconfig module 'libusb-legacy' is available
- PKG_CHECK_MODULES(USB, [libusb-legacy], [libusbok=yes], [libusbok=no])
- fi
- if test $libusbok = yes; then
- dnl if PKGCONFIG worked, set variables for further testing
- usb_header='usb.h'
- usb_lib_func='usb_bulk_write'
- usb_lib_name='usb'
+ PKG_CHECK_MODULES(USB, [libusb-legacy], [
+ libusbok=yes
+ LIBUSB_PKG_CONFIG_NAME='libusb-legacy'
+ ], [libusbok=no])
fi
+ dnl set variables for further testing
+ usb_header='usb.h'
+ usb_lib_func='usb_bulk_write'
+ usb_lib_name='usb'
fi
- if test $libusbok = no; then
- AC_MSG_RESULT([USRP requires libusb, which was not found. See http://www.libusb.org])
- else
+ AC_SUBST(LIBUSB_PKG_CONFIG_NAME)
+ if test x$1 != xyes || test $have_libusb1 = yes; then
+ dnl Either (1) libusb1 was specified and found; or
+ dnl (2) libusb1 was not specified. Restart checking.
+ libusbok=yes
- dnl either some pkgconfig LIBUSB* variant was found, or USB_*
- dnl variables were overridden by the user as arguments to configure.
- dnl either way, check the USB_* variables to make sure they work
+ dnl Verify that $usb_header is a valid header, and if so,
+ dnl then verify that $usb_lib_func can be found in the
+ dnl library $usb_lib_name.
+
+ dnl If PKGCONFIG found variable USB_INCLUDEDIR, and it is
+ dnl not empty, use it for checking for $usb_header.
+ dnl Otherwise, maybe the user's shell environment is already
+ dnl configured to find this header.
AC_LANG_PUSH(C)
save_CPPFLAGS="$CPPFLAGS"
else
dnl found the header; now make sure the library is OK
+ dnl On Darwin, need to include the IOKit library.
AC_LANG_PUSH(C)
save_LIBS="$LIBS"
+ LIBS=""
case "$host_os" in
darwin*)
USB_LIBS="$USB_LIBS -lIOKit"
+ LIBS="$USB_LIBS"
;;
*) ;;
esac
- LIBS="$LIBS $USB_LIBS"
AC_CHECK_LIB([$usb_lib_name], [$usb_lib_func], [], [
libusbok=no
AC_MSG_RESULT([USRP requires library '$usb_lib_name' with function '$usb_lib_func', which was either not found or was not usable. See http://www.libusb.org])
])
+ case "$host_os" in
+ cygwin* | mingw*)
+ USB_LIBS="$LIBS"
+ ;;
+ *) ;;
+ esac
LIBS="$save_LIBS"
AC_LANG_POP(C)
fi