-# Check for libusb support. -*- Autoconf -*-
+dnl Copyright 2003,2008,2009 Free Software Foundation, Inc.
+dnl
+dnl This file is part of GNU Radio
+dnl
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING. If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
-# Copyright 2003 Free Software Foundation, Inc.
+# $1 is $req_libusb1:
+# yes : check libusb-1.0
+# no : check libusb-0.12
+# "" : check libusb-0.12
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
+AC_DEFUN([USRP_LIBUSB], [
+ dnl do not use LDFLAGS, except on Windows
+ saved_LDFLAGS=${LDFLAGS}
+ case "$host_os" in
+ cygwin* | mingw*)
+ ;;
+ *)
+ LDFLAGS=
+ ;;
+ esac
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
+ dnl this variable is set in usrp/usrp.pc.in as a requirement
+ dnl for libusrp; it is OK to be empty.
+ LIBUSB_PKG_CONFIG_NAME=
-AC_DEFUN([USRP_LIBUSB],
-[
- AC_LANG_PUSH(C)
+ dnl for Windows (cygin, mingw), do not use PKGCONFIG since LIBUSB
+ dnl does not install a .pc file. For all other OSs, use
+ dnl PKGCONFIG to check for various package names first.
+ libusb_list=''
+ case "$host_os" in
+ cygwin* | mingw*)
+ libusb_list='libusb'
+ ;;
+ *)
+ dnl create the list of libusb PKGCONFIG modules to test
+ if test x$1 = xyes; then
+ dnl libusb-1.0 was requested; just test for it
+ libusb_list="libusb-1.0"
+ else
+ dnl test for legacy libusb only
+ libusb_list="libusb libusb-legacy"
+ fi
+ ;;
+ esac
- libusbok=yes
- AC_CHECK_HEADERS([usb.h],
- [],
- [libusbok=no,
- AC_MSG_RESULT([USRP requires libusb. usb.h not found. See http://libusb.sf.net])]
- )
+ dnl loop over various possible 'libusb' names, and
+ dnl choose the first one that meets both the user's selection
+ dnl (via configure flags) as well as what is installed
+ for libusb_name in ${libusb_list}; do
+ dnl clear internal variables
+ libusbok=no
+ have_libusb1=no
+ usb_header=''
+ usb_lib_func=''
+ usb_lib_name=''
+ case "$host_os" in
+ cygwin* | mingw*)
+ USB_INCLUDEDIR=
+ USB_INCLUDES=
+ USB_LIBS=-lusb
+ usb_header='usb.h'
+ usb_lib_func='usb_bulk_write'
+ libusbok=yes
+ ;;
+ *)
+ dnl start checks
+ AC_MSG_NOTICE([Checking for LIBUSB version '${libusb_name}'])
+ if test ${libusb_name} = "libusb-1.0"; then
+ dnl see if the pkgconfig module is available
+ PKG_CHECK_MODULES(USB, ${libusb_name}, [
+ libusbok=yes
+ have_libusb1=yes
+ usb_header='libusb-1.0/libusb.h'
+ usb_lib_func='libusb_bulk_transfer'
+ ], [libusbok=no])
+ else
+ dnl see if the pkgconfig module is available
+ PKG_CHECK_MODULES(USB, ${libusb_name}, [
+ libusbok=yes
+ usb_header='usb.h'
+ usb_lib_func='usb_bulk_write'
+ ], [libusbok=no])
+ fi
+ ;;
+ esac
+ if test $libusbok = yes; then
+ dnl PKGCONFIG found a version of LIBUSB, or the info was
+ dnl provided by the user, or the OS is Windows.
+
+ dnl Check it to make sure it meets enough criteria:
+ dnl Verify that $usb_header is a valid header. If so, then
+ dnl verify that $usb_lib_func can be found in the library
+ dnl $usb_lib_name. if so, verify that the symbol 'usb_debug' is
+ dnl found in the library if not using Windows.
+
+ dnl Check for the header. Similar to AC_CHECK_HEADERS,
+ dnl but doesn't append to known \#defines.
+ 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"
+ if test x$USB_INCLUDEDIR != x; then
+ USB_INCLUDES="-I$USB_INCLUDEDIR"
+ CPPFLAGS="$USB_INCLUDES"
+ fi
+ AC_MSG_CHECKING([$libusb_name for header $usb_header])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #include "$usb_header"
+ ]], [])],
+ [libusbok=yes],[libusbok=no])
+ AC_MSG_RESULT([$libusbok])
+ CPPFLAGS="$save_CPPFLAGS"
+ AC_LANG_POP(C)
+
+ if test $libusbok = yes; then
+ dnl found the header; now make sure the library is OK
+ dnl On Darwin, need to include the IOKit library.
+
+ AC_LANG_PUSH(C)
save_LIBS="$LIBS"
- case "$host_os" in
- darwin*) LIBS="$LIBS -lIOKit" ;;
- *) ;;
- esac
- AC_SEARCH_LIBS(usb_bulk_write, [usb],
- [USB_LIBS="$LIBS"],
- [libusbok=no,
- AC_MSG_RESULT([USRP requires libusb. usb_bulk_write not found. See http://libusb.sf.net])]
- )
+ case "$host_os" in
+ darwin*)
+ USB_LIBS="$USB_LIBS -lIOKit"
+ ;;
+ *) ;;
+ esac
+ LIBS="$USB_LIBS"
+
+ dnl find the library link name
+ usb_lib_name=`echo $USB_LIBS | sed -e "s@.*-l\(usb[[^ ]]*\).*@\1@"`
+
+ dnl Check for the function in the library. Similar to
+ dnl AC_CHECK_LIB, but doesn't append to known \#defines.
+ AC_MSG_CHECKING([$libusb_name for function $usb_lib_func in library $usb_lib_name])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+ #ifdef __cplusplus
+ extern "C"
+ #endif
+ char $usb_lib_func ();
+ ]], [[return $usb_lib_func ();]])],
+ [libusbok=yes],[libusbok=no])
+ AC_MSG_RESULT([$libusbok])
LIBS="$save_LIBS"
+ AC_LANG_POP(C)
+
+ if test $libusbok = yes; then
+ if test ${libusb_name} != "libusb-1.0"; then
+ dnl PKGCONFIG found a legacy version of libusb; make sure the
+ dnl variable _usb_debug is available in the found library.
+ dnl Do not test on Windows, since that symbol is not defined.
+ case "$host_os" in
+ cygwin* | mingw*)
+ ;;
+ *)
+ AC_LANG_PUSH(C)
+ save_CPPFLAGS="$CPPFLAGS"
+ if test x$USB_INCLUDEDIR != x; then
+ CPPFLAGS="$USB_INCLUDES"
+ fi
+ save_LIBS="$LIBS"
+ LIBS="$USB_LIBS"
+ AC_MSG_CHECKING([$libusb_name for symbol usb_debug in library $usb_lib_name])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+ extern int usb_debug;]],
+ [[usb_debug = 0;]])],
+ [libusbok=yes],[libusbok=no])
+ AC_MSG_RESULT([$libusbok])
+ LIBS="$save_LIBS"
+ CPPFLAGS="$save_CPPFLAGS"
+ AC_LANG_POP(C)
+ ;;
+ esac
+ fi
+ fi
+ fi
+ fi
+ dnl if everything checks out OK, finish up
+ if test $libusbok = yes; then
+ case "$host_os" in
+ cygwin* | mingw*)
+ ;;
+ *)
+ LIBUSB_PKG_CONFIG_NAME="${libusb_name}"
+ ;;
+ esac
+ break
+ else
+ dnl something wasn't found in this LIBUSB version.
+ dnl HACK: clear cache variables for header and library
+ unset USB_INCLUDEDIR
+ unset USB_INCLUDES
+ unset USB_LIBS
+ unset $as_ac_Header
+ unset $as_ac_Lib
+ fi
+ done
+
+ if test $libusbok = yes; then
+ dnl final error checking, mostly to create #define's
+ AC_LANG_PUSH(C)
+ save_CPPFLAGS="$CPPFLAGS"
+ if test x$USB_INCLUDEDIR != x; then
+ CPPFLAGS="$USB_INCLUDES"
+ fi
+ dnl Check for the header.
+ AC_CHECK_HEADERS([$usb_header], [], [libusbok=no])
+ CPPFLAGS="$save_CPPFLAGS"
+ AC_LANG_POP(C)
+
+ 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
+ dnl check for the library (again)
+ AC_LANG_PUSH(C)
+ save_CPPFLAGS="$CPPFLAGS"
+ if test x$USB_INCLUDEDIR != x; then
+ CPPFLAGS="$USB_INCLUDES"
+ fi
+ save_LIBS="$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"
+ CPPFLAGS="$save_CPPFLAGS"
+ AC_LANG_POP(C)
+ fi
+ fi
+
+ if test $libusbok = yes; then
+ dnl success
+ AC_MSG_NOTICE([Using LIBUSB version '${libusb_name}'])
+ ifelse([$2], , :, [$2])
+ else
+ dnl not found; clear substitution variables
+ LIBUSB_PKG_CONFIG_NAME=
+ USB_INCLUDES=
+ USB_LIBS=
+ ifelse([$3], , :, [$3])
+ fi
- AC_LANG_POP
+ dnl create substitution variables
+ AC_SUBST(USB_INCLUDES)
+ AC_SUBST(USB_LIBS)
+ AC_SUBST(LIBUSB_PKG_CONFIG_NAME)
- if test $libusbok = yes; then
- AC_SUBST(USB_LIBS)
- ifelse([$1], , :, [$1])
- else
- ifelse([$2], , :, [$2])
- fi
+ dnl restore LDFLAGS
+ LDFLAGS=${saved_LDFLAGS}
])
projects / debian / gnuradio / blobdiff