diff options
Diffstat (limited to 'm4/libusb.m4')
| -rw-r--r-- | m4/libusb.m4 | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/m4/libusb.m4 b/m4/libusb.m4 new file mode 100644 index 000000000..d11a9d954 --- /dev/null +++ b/m4/libusb.m4 @@ -0,0 +1,50 @@ +dnl Check for libusb +dnl Copyright (C) 2004 Free Software Foundation, Inc. +dnl +dnl This file is free software, distributed under the terms of the GNU +dnl General Public License. As a special exception to the GNU General +dnl Public License, this file may be distributed as part of a program +dnl that contains a configuration script generated by Autoconf, under +dnl the same distribution terms as the rest of that program. +dnl +dnl Defines HAVE_LIBUSB to 1 if a working libusb setup is found, and sets +dnl @LIBUSB@ to the necessary libraries. HAVE_USB_GET_BUSSES is set if +dnl usb_get_busses() exists. + +AC_DEFUN([GNUPG_CHECK_LIBUSB], +[ + AC_ARG_WITH(libusb, + AC_HELP_STRING([--with-libusb=DIR], + [look for the libusb library in DIR]), + [_do_libusb=$withval],[_do_libusb=yes]) + + if test "$_do_libusb" != "no" ; then + if test -d "$withval" ; then + CPPFLAGS="${CPPFLAGS} -I$withval/include" + LDFLAGS="${LDFLAGS} -L$withval/lib" + fi + + _libusb_save_libs=$LIBS + LIBS="$LIBS -lusb" + + AC_MSG_CHECKING([whether libusb is present and sane]) + + AC_LINK_IFELSE(AC_LANG_PROGRAM([#include <usb.h>],[ +usb_bulk_write(NULL,0,NULL,0,0); +]),_found_libusb=yes,_found_libusb=no) + + AC_MSG_RESULT([$_found_libusb]) + + if test $_found_libusb = yes ; then + AC_DEFINE(HAVE_LIBUSB,1, + [Define to 1 if you have a fully functional libusb library.]) + AC_SUBST(LIBUSB,"-lusb") + AC_CHECK_FUNCS(usb_get_busses) + fi + + LIBS=$_libusb_save_libs + + unset _libusb_save_libs + unset _found_libusb + fi +])dnl |