dnl make sure the USB_* variables work (whether from PKGCONFIG
dnl or overridden by the user)
- libusbok=no
- have_libusb1=no
- LIBUSB_PKG_CONFIG_NAME=''
+ dnl do not use LDFLAGS, since PKGCONFIG will provide everything
+ saved_LDFLAGS=${LDFLAGS}
+ LDFLAGS=
+ LIBUSB_PKG_CONFIG_NAME=
+
+ dnl loop over various possible 'libusb' PKGCONFIG names, and choose
+ dnl the first one that meets both the user's selection (via
+ dnl configure flags) as well as what is installed
+
+ dnl create the list of libusb PKGCONFIG modules to test
+ libusb_list=''
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'
- ])
+ dnl libusb-1.0 was requested; just test for it
+ libusb_list="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
-
- dnl see if the pkgconfig module 'libusb' is available
- PKG_CHECK_MODULES(USB, libusb, [
- libusbok=yes
- LIBUSB_PKG_CONFIG_NAME='libusb'
+ dnl test for legacy libusb only
+ libusb_list="libusb libusb-legacy"
+ fi
+ for libusb_name in ${libusb_list}; do
+ dnl clear internal variables
+ libusbok=no
+ have_libusb1=no
+ usb_header=''
+ usb_lib_func=''
+ usb_lib_name=''
+
+ dnl start checks
+ AC_MSG_NOTICE([Checking for LIBUSB version '${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])
- 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], [
+ else
+ dnl see if the pkgconfig module is available
+ PKG_CHECK_MODULES(USB, ${libusb_name}, [
libusbok=yes
- LIBUSB_PKG_CONFIG_NAME='libusb-legacy'
- ], [libusbok=no])
+ usb_header='usb.h'
+ usb_lib_func='usb_bulk_write'
+ ], [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
+ if test $libusbok = yes; then
+ dnl PKGCONFIG found a version of LIBUSB.
+ 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.
+
+ 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.
- 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 $usb_lib_name.
+ AC_LANG_PUSH(C)
+ save_LIBS="$LIBS"
+ LIBS=""
+ case "$host_os" in
+ darwin*)
+ USB_LIBS="$USB_LIBS -lIOKit"
+ LIBS="$USB_LIBS"
+ ;;
+ *) ;;
+ esac
- 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.
+ 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])
+ case "$host_os" in
+ cygwin* | mingw*)
+ USB_LIBS="$LIBS"
+ ;;
+ *) ;;
+ esac
+ LIBS="$save_LIBS"
+ AC_LANG_POP(C)
+
+ if test $libusbok = yes; then
+ if test ${libusb_name} != "libusb-1.0"; then
+ dnl PKGCONFIG found a legacy version of libusb; make sure the
+ dnl variable _usb_debug is available in the found library
+ AC_LANG_PUSH(C)
+ save_CPPFLAGS="$CPPFLAGS"
+ CPPFLAGS="$USB_INCLUDES"
+ save_LIBS="$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)
+ fi
+ fi
+ fi
+ fi
+ dnl if everything checks out OK, finish up
+ if test $libusbok = yes; then
+ LIBUSB_PKG_CONFIG_NAME="${libusb_name}"
+ 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$USB_INCLUDEDIR != x; then
- USB_INCLUDES="-I$USB_INCLUDEDIR"
- CPPFLAGS="$CPPFLAGS $USB_INCLUDES"
- AC_SUBST(USB_INCLUDES)
- fi
+ CPPFLAGS="$USB_INCLUDES"
+ 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 found the header; now make sure the library is OK
- dnl On Darwin, need to include the IOKit library.
-
+ dnl check for the library (again)
AC_LANG_PUSH(C)
+ save_CPPFLAGS="$CPPFLAGS"
+ CPPFLAGS="$USB_INCLUDES"
save_LIBS="$LIBS"
- LIBS=""
- case "$host_os" in
- darwin*)
- USB_LIBS="$USB_LIBS -lIOKit"
- LIBS="$USB_LIBS"
- ;;
- *) ;;
- esac
+ 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="$LIBS"
- ;;
- *) ;;
- esac
+ AC_MSG_RESULT([USRP requires library '$usb_lib_name' with function '$usb_lib_func', which was either not found or was not usable. See http://www.libusb.org])])
LIBS="$save_LIBS"
+ CPPFLAGS="$save_CPPFLAGS"
AC_LANG_POP(C)
fi
fi
+
if test $libusbok = yes; then
- AC_SUBST(USB_LIBS)
+ dnl success
+ AC_MSG_NOTICE([Using LIBUSB version '${libusb_name}'])
ifelse([$2], , :, [$2])
else
+ dnl not found; clear substitution variables
+ LIBUSB_PKG_CONFIG_NAME=
USB_INCLUDES=
USB_LIBS=
ifelse([$3], , :, [$3])
fi
+
+ dnl create substitution variables
+ AC_SUBST(USB_INCLUDES)
+ AC_SUBST(USB_LIBS)
+ AC_SUBST(LIBUSB_PKG_CONFIG_NAME)
+
+ dnl restore LDFLAGS
+ LDFLAGS=${saved_LDFLAGS}
])
projects / debian / gnuradio / commitdiff