From 33070d71935260963ee2e43b42c70aced7015962 Mon Sep 17 00:00:00 2001
From: Simon Josefsson <simon@josefsson.org>
Date: Thu, 7 May 2009 18:18:32 +0000
Subject: [PATCH] Implement autoconf based backend chosing.

---
 configure.ac           | 27 ++++++++++++++++++++++-----
 ykcore/Makefile.am     | 11 +++++++++--
 ykcore/ykcore.c        | 13 ++++---------
 ykcore/ykcore_libusb.c |  8 +++-----
 4 files changed, 38 insertions(+), 21 deletions(-)

diff --git a/configure.ac b/configure.ac
index 6712f0e..df4475f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,17 +44,34 @@ AC_PROG_CC
 AC_LIBTOOL_WIN32_DLL
 AC_PROG_LIBTOOL
 
-AC_LIB_HAVE_LINKFLAGS(usb,, [#include <usb.h>], [usb_init()])
-if test "$ac_cv_libusb" != yes; then
-   AC_MSG_ERROR([libusb not found, please install usb.h and libusb.so])
-fi
-
 AC_LIB_HAVE_LINKFLAGS(yubikey,, [#include <yubikey.h>],
 				[yubikey_modhex_decode(0,0,0)])
 if test "$ac_cv_libyubikey" != yes; then
    AC_MSG_ERROR([libyubikey not found, see http://code.google.com/p/yubico-c/])
 fi
 
+AC_ARG_WITH([backend],
+  [AS_HELP_STRING([--with-backend=ARG],
+    [use specific backend; 'libusb' or 'osx'])])
+AC_MSG_CHECKING([for backend])
+if test x$with_backend != xosx && test x$with_backend != xlibusb; then
+  AC_CANONICAL_HOST
+  case "$host" in
+    *-darwin*) with_backend=osx ;;
+    *) with_backend=libusb ;;
+  esac
+fi
+AC_MSG_RESULT([$with_backend])
+AM_CONDITIONAL([BACKEND_LIBUSB], test x$with_backend = xlibusb)
+AM_CONDITIONAL([BACKEND_OSX], test x$with_backend = xosx)
+
+if test x$with_backend = libusb; then
+  AC_LIB_HAVE_LINKFLAGS(usb,, [#include <usb.h>], [usb_init()])
+  if test "$ac_cv_libusb" != yes; then
+     AC_MSG_ERROR([libusb not found, please install usb.h and libusb.so])
+  fi
+fi
+
 AC_CONFIG_FILES([
   Makefile
   ykcore/Makefile
diff --git a/ykcore/Makefile.am b/ykcore/Makefile.am
index cb488db..38422a2 100644
--- a/ykcore/Makefile.am
+++ b/ykcore/Makefile.am
@@ -1,4 +1,4 @@
-# Copyright (c) 2008, Yubico AB
+# Copyright (c) 2008, 2009, Yubico AB
 # All rights reserved.
 # 
 # Redistribution and use in source and binary forms, with or without
@@ -29,4 +29,11 @@ noinst_LTLIBRARIES = libykcore.la
 libykcore_la_SOURCES = ykdef.h ykcore.h ykcore_backend.h ykcore.c \
 	ykstatus.h ykstatus.c
 libykcore_la_LIBADD = $(LTLIBYUBIKEY)
-EXTRA_DIST = ykcore_libusb.c ykcore_win32.c
+
+if BACKEND_LIBUSB
+libykcore_la_SOURCES += ykcore_libusb.c
+endif
+
+if BACKEND_OSX
+libykcore_la_SOURCES += ykcore_osx.c
+endif
diff --git a/ykcore/ykcore.c b/ykcore/ykcore.c
index e35fa6b..8da2b19 100644
--- a/ykcore/ykcore.c
+++ b/ykcore/ykcore.c
@@ -32,17 +32,12 @@
 #include "ykdef.h"
 #include "ykcore_backend.h"
 
-/* Include platform-specific backends for the USB routines */
-#ifdef _WIN32
-# include "ykcore_win32.c"
-#elif defined(__APPLE__)
-# include "ykcore_osx.c"
-#else
-# include "ykcore_libusb.c"
-#endif
-
 #include <yubikey.h>
 
+#ifndef _WIN32
+#define Sleep(x) usleep((x)*1000)
+#endif
+
 int yk_init(void)
 {
 	_ykusb_start();
diff --git a/ykcore/ykcore_libusb.c b/ykcore/ykcore_libusb.c
index 144422d..5f82656 100644
--- a/ykcore/ykcore_libusb.c
+++ b/ykcore/ykcore_libusb.c
@@ -1,6 +1,6 @@
 /* -*- mode:C; c-file-style: "bsd" -*- */
 /*
- * Copyright (c) 2008, Yubico AB
+ * Copyright (c) 2008, 2009, Yubico AB
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -32,12 +32,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#include "ykcore.h"
+#include "ykdef.h"
 #include "ykcore_backend.h"
 
-#ifndef _WIN32
-#define Sleep(x) usleep((x)*1000)
-#endif
-
 #define HID_GET_REPORT			0x01
 #define HID_SET_REPORT			0x09
 
-- 
2.39.5