mirror of git://git.gnupg.org/gnupg.git
70 lines
2.2 KiB
Plaintext
70 lines
2.2 KiB
Plaintext
dnl Check for libusb
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dnl Copyright (C) 2004, 2005 Free Software Foundation, Inc.
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dnl
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dnl This file is free software, distributed under the terms of the GNU
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dnl General Public License. As a special exception to the GNU General
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dnl Public License, this file may be distributed as part of a program
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dnl that contains a configuration script generated by Autoconf, under
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dnl the same distribution terms as the rest of that program.
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dnl
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dnl Defines HAVE_LIBUSB to 1 if a working libusb setup is found, and sets
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dnl @LIBUSB@ to the necessary libraries. HAVE_USB_GET_BUSSES is set if
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dnl usb_get_busses() exists.
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AC_DEFUN([GNUPG_CHECK_LIBUSB],
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[
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AC_ARG_WITH(libusb,
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AC_HELP_STRING([--with-libusb=DIR],
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[look for the libusb library in DIR]),
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[_do_libusb=$withval],[_do_libusb=yes])
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if test "$_do_libusb" != "no" ; then
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if test -d "$withval" ; then
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CPPFLAGS="${CPPFLAGS} -I$withval/include"
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LDFLAGS="${LDFLAGS} -L$withval/lib"
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AC_PATH_PROG([_usb_config],["$_do_libusb/bin/libusb-config"])
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else
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AC_PATH_PROG([_usb_config],[libusb-config])
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fi
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_libusb_save_libs=$LIBS
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_libusb_save_cflags=$CFLAGS
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if test x$_usb_config != "x" ; then
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_libusb_try_libs=`$LIBS $_usb_config --libs`
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_libusb_try_cflags=`$LIBS $_usb_config --cflags`
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else
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_libusb_try_libs="-lusb"
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_libusb_try_cflags=""
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fi
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LIBS="$LIBS $_libusb_try_libs"
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CFLAGS="$CFLAGS $_libusb_try_cflags"
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AC_MSG_CHECKING([whether libusb is present and sane])
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AC_LINK_IFELSE(AC_LANG_PROGRAM([#include <usb.h>],[
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usb_bulk_write(NULL,0,NULL,0,0);
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]),_found_libusb=yes,_found_libusb=no)
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AC_MSG_RESULT([$_found_libusb])
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if test $_found_libusb = yes ; then
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AC_DEFINE(HAVE_LIBUSB,1,
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[Define to 1 if you have a fully functional libusb library.])
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AC_SUBST(LIBUSB_CPPFLAGS,$_libusb_try_cflags)
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AC_SUBST(LIBUSB,$_libusb_try_libs)
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AC_CHECK_FUNCS(usb_get_busses)
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fi
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LIBS=$_libusb_save_libs
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CFLAGS=$_libusb_save_cflags
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unset _libusb_save_libs
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unset _libusb_save_cflags
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unset _libusb_try_libs
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unset _libusb_try_cflags
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unset _found_libusb
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fi
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])dnl
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