-dnl Copyright 2003,2008 Free Software Foundation, Inc.
+dnl Copyright 2003,2008,2009 Free Software Foundation, Inc.
dnl
dnl This file is part of GNU Radio
dnl
dnl the Free Software Foundation, Inc., 51 Franklin Street,
dnl Boston, MA 02110-1301, USA.
+# $1 is $req_libusb1:
+# yes : check libusb-1.0
+# no : check libusb-0.12
+# "" : check libusb-0.12
+
+
AC_DEFUN([USRP_LIBUSB], [
- libusbok=yes
- PKG_CHECK_MODULES(USB, libusb-1.0, [], [
- AC_LANG_PUSH(C)
+ dnl Use PKGCONFIG to check for packages first, then check to
+ dnl make sure the USB_* variables work (whether from PKGCONFIG
+ dnl or overridden by the user)
- AC_CHECK_HEADERS([libusb.h], [], [libusbok=no; AC_MSG_RESULT([USRP requires libusb1. usb.h not found. See http://libusb.sf.net])])
+ libusbok=no
+ have_libusb1=no
+ LIBUSB_PKG_CONFIG_NAME=''
+ if test x$1 = xyes; then
+ PKG_CHECK_MODULES(USB, libusb-1.0, [
+ libusbok=yes
+ have_libusb1=yes
+ usb_header='libusb-1.0/libusb.h'
+ usb_lib_func='libusb_bulk_transfer'
+ usb_lib_name='usb-1.0'
+ LIBUSB_PKG_CONFIG_NAME='libusb-1.0'
+ ])
+ else
+ dnl not using libusb1 (for now); see if legacy version is found.
+ dnl it might be installed under the name either 'libusb' or
+ dnl 'libusb-legacy', or just available via the
+ dnl user's shell environment
- save_LIBS="$LIBS"
- case "$host_os" in
- darwin*)
- LIBS="$LIBS -lIOKit"
- ;;
- *) ;;
- esac
+ dnl see if the pkgconfig module 'libusb' is available
+ 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
+ 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
+ AC_SUBST(LIBUSB_PKG_CONFIG_NAME)
+ if test x$1 != xyes || test $have_libusb1 = yes; then
+ dnl Either (1) libusb1 was specified and found; or
+ dnl (2) libusb1 was not specified. Restart checking.
+ libusbok=yes
- AC_SEARCH_LIBS(usb_bulk_write, [usb], [USB_LIBS="$LIBS"], [libusbok=no; AC_MSG_RESULT([USRP requires libusb. usb_bulk_write not found. See http://libusb.sf.net])])
+ 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 $usb_lib_name.
- LIBS="$save_LIBS"
+ dnl If PKGCONFIG found variable USB_INCLUDEDIR, and it is
+ dnl not empty, use it for checking for $usb_header.
+ dnl Otherwise, maybe the user's shell environment is already
+ dnl configured to find this header.
- AC_LANG_POP
- ])
+ AC_LANG_PUSH(C)
+ save_CPPFLAGS="$CPPFLAGS"
+ if test x$USB_INCLUDEDIR != x; then
+ USB_INCLUDES="-I$USB_INCLUDEDIR"
+ CPPFLAGS="$CPPFLAGS $USB_INCLUDES"
+ AC_SUBST(USB_INCLUDES)
+ fi
+ AC_CHECK_HEADERS([$usb_header], [], [libusbok=no])
+ CPPFLAGS="$save_CPPFLAGS"
+ AC_LANG_POP(C)
- if test x$libusbok = xyes; then
- AC_SUBST(USB_LIBS)
- ifelse([$1], , :, [$1])
+ if test $libusbok = no; then
+ AC_MSG_RESULT([USRP requires libusb header '$usb_header' which was not found or was not usable. See http://www.libusb.org])
else
- ifelse([$2], , :, [$2])
+
+ dnl found the header; now make sure the library is OK
+ dnl On Darwin, need to include the IOKit library.
+
+ AC_LANG_PUSH(C)
+ save_LIBS="$LIBS"
+ LIBS=""
+ case "$host_os" in
+ darwin*)
+ USB_LIBS="$USB_LIBS -lIOKit"
+ LIBS="$USB_LIBS"
+ ;;
+ *) ;;
+ esac
+ AC_CHECK_LIB([$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
+ fi
+ if test $libusbok = yes; then
+ AC_SUBST(USB_LIBS)
+ ifelse([$2], , :, [$2])
+ else
+ USB_INCLUDES=
+ USB_LIBS=
+ ifelse([$3], , :, [$3])
+ fi
])