From 2bd3590d7e1d2e697ee68e992a8836206ef19d64 Mon Sep 17 00:00:00 2001
From: Henning Geinitz <sane@geinitz.org>
Date: Wed, 16 May 2001 19:04:13 +0000
Subject: [PATCH] Detect presence of libusb and enable sm3600 backend. Henning
 Meier-Geinitz <henning@meier-geinitz.de>

---
 configure    | 189 +++++++++++++++++++++++++++++++++------------------
 configure.in |  12 +++-
 2 files changed, 134 insertions(+), 67 deletions(-)

diff --git a/configure b/configure
index 7189fdd81..d086e6bd2 100755
--- a/configure
+++ b/configure
@@ -1607,7 +1607,7 @@ for ac_hdr in fcntl.h unistd.h libc.h sys/dsreq.h sys/select.h \
     bsd/dev/scsireg.h scsi/sg.h /usr/src/linux/include/scsi/sg.h io/cam/cam.h \
     camlib.h os2.h sys/socket.h sys/io.h asm/io.h gscdds.h sys/hw.h \
     sys/types.h sys/scsi/scsi.h sys/scsi/sgdefs.h sys/scsi/targets/scgio.h \
-    apollo/scsi.h sys/sdi_comm.h sys/passthrudef.h linux/ppdev.h
+    apollo/scsi.h sys/sdi_comm.h sys/passthrudef.h linux/ppdev.h usb.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
@@ -2693,10 +2693,57 @@ else
   echo "$ac_t""no" 1>&6
 fi
             # OS/2 needs this
+echo $ac_n "checking for usb_open in -lusb""... $ac_c" 1>&6
+echo "configure:2698: checking for usb_open in -lusb" >&5
+ac_lib_var=`echo usb'_'usb_open | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  ac_save_LIBS="$LIBS"
+LIBS="-lusb  $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 2706 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char usb_open();
+
+int main() {
+usb_open()
+; return 0; }
+EOF
+if { (eval echo configure:2717: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  eval "ac_cv_lib_$ac_lib_var=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_lib=HAVE_LIB`echo usb | sed -e 's/[^a-zA-Z0-9_]/_/g' \
+    -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_lib 1
+EOF
+
+  LIBS="-lusb $LIBS"
+
+else
+  echo "$ac_t""no" 1>&6
+fi
+
 
 
   echo $ac_n "checking for jpeg_start_decompress in -ljpeg""... $ac_c" 1>&6
-echo "configure:2700: checking for jpeg_start_decompress in -ljpeg" >&5
+echo "configure:2747: checking for jpeg_start_decompress in -ljpeg" >&5
 ac_lib_var=`echo jpeg'_'jpeg_start_decompress | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2704,7 +2751,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ljpeg  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2708 "configure"
+#line 2755 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -2715,7 +2762,7 @@ int main() {
 jpeg_start_decompress()
 ; return 0; }
 EOF
-if { (eval echo configure:2719: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2766: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2733,17 +2780,17 @@ if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
   
     ac_safe=`echo "jconfig.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for jconfig.h""... $ac_c" 1>&6
-echo "configure:2737: checking for jconfig.h" >&5
+echo "configure:2784: checking for jconfig.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2742 "configure"
+#line 2789 "configure"
 #include "confdefs.h"
 #include <jconfig.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:2747: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:2794: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -2761,9 +2808,9 @@ if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
   echo "$ac_t""yes" 1>&6
   
       echo $ac_n "checking for jpeglib - version >= 61 (6a)""... $ac_c" 1>&6
-echo "configure:2765: checking for jpeglib - version >= 61 (6a)" >&5
+echo "configure:2812: checking for jpeglib - version >= 61 (6a)" >&5
       cat > conftest.$ac_ext <<EOF
-#line 2767 "configure"
+#line 2814 "configure"
 #include "confdefs.h"
 
         #include <jpeglib.h>
@@ -2797,7 +2844,7 @@ fi
 
 if test "`uname`" != "IRIX" -a "`uname`" != "IRIX64"; then
     echo $ac_n "checking for gethostbyaddr in -lnsl""... $ac_c" 1>&6
-echo "configure:2801: checking for gethostbyaddr in -lnsl" >&5
+echo "configure:2848: checking for gethostbyaddr in -lnsl" >&5
 ac_lib_var=`echo nsl'_'gethostbyaddr | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2805,7 +2852,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lnsl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2809 "configure"
+#line 2856 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -2816,7 +2863,7 @@ int main() {
 gethostbyaddr()
 ; return 0; }
 EOF
-if { (eval echo configure:2820: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2867: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2844,7 +2891,7 @@ else
 fi
 
     echo $ac_n "checking for socket in -lsocket""... $ac_c" 1>&6
-echo "configure:2848: checking for socket in -lsocket" >&5
+echo "configure:2895: checking for socket in -lsocket" >&5
 ac_lib_var=`echo socket'_'socket | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2852,7 +2899,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lsocket  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2856 "configure"
+#line 2903 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -2863,7 +2910,7 @@ int main() {
 socket()
 ; return 0; }
 EOF
-if { (eval echo configure:2867: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:2914: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2916,17 +2963,17 @@ fi
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:2920: checking for $ac_hdr" >&5
+echo "configure:2967: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2925 "configure"
+#line 2972 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:2930: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:2977: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -2947,7 +2994,7 @@ if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
 #define $ac_tr_hdr 1
 EOF
  echo $ac_n "checking for ptalInit in -lptal""... $ac_c" 1>&6
-echo "configure:2951: checking for ptalInit in -lptal" >&5
+echo "configure:2998: checking for ptalInit in -lptal" >&5
 ac_lib_var=`echo ptal'_'ptalInit | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -2955,7 +3002,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lptal  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2959 "configure"
+#line 3006 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -2966,7 +3013,7 @@ int main() {
 ptalInit()
 ; return 0; }
 EOF
-if { (eval echo configure:2970: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3017: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3018,19 +3065,19 @@ fi
 # The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
 # for constant arguments.  Useless!
 echo $ac_n "checking for working alloca.h""... $ac_c" 1>&6
-echo "configure:3022: checking for working alloca.h" >&5
+echo "configure:3069: checking for working alloca.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_alloca_h'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3027 "configure"
+#line 3074 "configure"
 #include "confdefs.h"
 #include <alloca.h>
 int main() {
 void *p = alloca(2 * sizeof(int));
 ; return 0; }
 EOF
-if { (eval echo configure:3034: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3081: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_header_alloca_h=yes
 else
@@ -3051,12 +3098,12 @@ EOF
 fi
 
 echo $ac_n "checking for alloca""... $ac_c" 1>&6
-echo "configure:3055: checking for alloca" >&5
+echo "configure:3102: checking for alloca" >&5
 if eval "test \"`echo '$''{'ac_cv_func_alloca_works'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3060 "configure"
+#line 3107 "configure"
 #include "confdefs.h"
 
 #ifdef __GNUC__
@@ -3084,7 +3131,7 @@ int main() {
 char *p = (char *) alloca(1);
 ; return 0; }
 EOF
-if { (eval echo configure:3088: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3135: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_func_alloca_works=yes
 else
@@ -3116,12 +3163,12 @@ EOF
 
 
 echo $ac_n "checking whether alloca needs Cray hooks""... $ac_c" 1>&6
-echo "configure:3120: checking whether alloca needs Cray hooks" >&5
+echo "configure:3167: checking whether alloca needs Cray hooks" >&5
 if eval "test \"`echo '$''{'ac_cv_os_cray'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3125 "configure"
+#line 3172 "configure"
 #include "confdefs.h"
 #if defined(CRAY) && ! defined(CRAY2)
 webecray
@@ -3146,12 +3193,12 @@ echo "$ac_t""$ac_cv_os_cray" 1>&6
 if test $ac_cv_os_cray = yes; then
 for ac_func in _getb67 GETB67 getb67; do
   echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:3150: checking for $ac_func" >&5
+echo "configure:3197: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3155 "configure"
+#line 3202 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -3174,7 +3221,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3178: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3225: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -3201,7 +3248,7 @@ done
 fi
 
 echo $ac_n "checking stack direction for C alloca""... $ac_c" 1>&6
-echo "configure:3205: checking stack direction for C alloca" >&5
+echo "configure:3252: checking stack direction for C alloca" >&5
 if eval "test \"`echo '$''{'ac_cv_c_stack_direction'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3209,7 +3256,7 @@ else
   ac_cv_c_stack_direction=0
 else
   cat > conftest.$ac_ext <<EOF
-#line 3213 "configure"
+#line 3260 "configure"
 #include "confdefs.h"
 find_stack_direction ()
 {
@@ -3228,7 +3275,7 @@ main ()
   exit (find_stack_direction() < 0);
 }
 EOF
-if { (eval echo configure:3232: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3279: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_stack_direction=1
 else
@@ -3253,17 +3300,17 @@ for ac_hdr in unistd.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:3257: checking for $ac_hdr" >&5
+echo "configure:3304: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3262 "configure"
+#line 3309 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:3267: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:3314: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -3292,12 +3339,12 @@ done
 for ac_func in getpagesize
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:3296: checking for $ac_func" >&5
+echo "configure:3343: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3301 "configure"
+#line 3348 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -3320,7 +3367,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3324: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3371: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -3345,7 +3392,7 @@ fi
 done
 
 echo $ac_n "checking for working mmap""... $ac_c" 1>&6
-echo "configure:3349: checking for working mmap" >&5
+echo "configure:3396: checking for working mmap" >&5
 if eval "test \"`echo '$''{'ac_cv_func_mmap_fixed_mapped'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3353,7 +3400,7 @@ else
   ac_cv_func_mmap_fixed_mapped=no
 else
   cat > conftest.$ac_ext <<EOF
-#line 3357 "configure"
+#line 3404 "configure"
 #include "confdefs.h"
 
 /* Thanks to Mike Haertel and Jim Avera for this test.
@@ -3496,7 +3543,7 @@ main()
 }
 
 EOF
-if { (eval echo configure:3500: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:3547: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_func_mmap_fixed_mapped=yes
 else
@@ -3524,12 +3571,12 @@ for ac_func in atexit ioperm mkdir scsireq_enter sigprocmask \
     getenv isfdtype vsyslog
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:3528: checking for $ac_func" >&5
+echo "configure:3575: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3533 "configure"
+#line 3580 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -3552,7 +3599,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:3556: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3603: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -3578,7 +3625,7 @@ done
 
 
   echo $ac_n "checking linker parameter to set runtime link path""... $ac_c" 1>&6
-echo "configure:3582: checking linker parameter to set runtime link path" >&5
+echo "configure:3629: checking linker parameter to set runtime link path" >&5
 if eval "test \"`echo '$''{'LINKER_RPATH'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3671,7 +3718,7 @@ fi
 # Extract the first word of "ranlib", so it can be a program name with args.
 set dummy ranlib; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:3675: checking for $ac_word" >&5
+echo "configure:3722: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3699,7 +3746,7 @@ else
 fi
 
 echo $ac_n "checking for BSD-compatible nm""... $ac_c" 1>&6
-echo "configure:3703: checking for BSD-compatible nm" >&5
+echo "configure:3750: checking for BSD-compatible nm" >&5
 if eval "test \"`echo '$''{'ac_cv_path_NM'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3736,7 +3783,7 @@ echo "$ac_t""$NM" 1>&6
 
 
 echo $ac_n "checking whether ln -s works""... $ac_c" 1>&6
-echo "configure:3740: checking whether ln -s works" >&5
+echo "configure:3787: checking whether ln -s works" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_LN_S'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3786,8 +3833,8 @@ test x"$silent" = xyes && libtool_flags="$libtool_flags --silent"
 case "$host" in
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 3790 "configure"' > conftest.$ac_ext
-  if { (eval echo configure:3791: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  echo '#line 3837 "configure"' > conftest.$ac_ext
+  if { (eval echo configure:3838: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
     case "`/usr/bin/file conftest.o`" in
     *32-bit*)
       LD="${LD-ld} -32"
@@ -3808,7 +3855,7 @@ case "$host" in
   SAVE_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS -belf"
   echo $ac_n "checking whether the C compiler needs -belf""... $ac_c" 1>&6
-echo "configure:3812: checking whether the C compiler needs -belf" >&5
+echo "configure:3859: checking whether the C compiler needs -belf" >&5
 if eval "test \"`echo '$''{'lt_cv_cc_needs_belf'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3821,14 +3868,14 @@ ac_link='${CC-cc} -o conftest${ac_exeext} $CFLAGS $CPPFLAGS $LDFLAGS conftest.$a
 cross_compiling=$ac_cv_prog_cc_cross
 
      cat > conftest.$ac_ext <<EOF
-#line 3825 "configure"
+#line 3872 "configure"
 #include "confdefs.h"
 
 int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:3832: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3879: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   lt_cv_cc_needs_belf=yes
 else
@@ -3858,7 +3905,7 @@ echo "$ac_t""$lt_cv_cc_needs_belf" 1>&6
   # Extract the first word of "${ac_tool_prefix}dlltool", so it can be a program name with args.
 set dummy ${ac_tool_prefix}dlltool; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:3862: checking for $ac_word" >&5
+echo "configure:3909: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_DLLTOOL'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3890,7 +3937,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "dlltool", so it can be a program name with args.
 set dummy dlltool; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:3894: checking for $ac_word" >&5
+echo "configure:3941: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_DLLTOOL'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3925,7 +3972,7 @@ fi
   # Extract the first word of "${ac_tool_prefix}as", so it can be a program name with args.
 set dummy ${ac_tool_prefix}as; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:3929: checking for $ac_word" >&5
+echo "configure:3976: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_AS'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3957,7 +4004,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "as", so it can be a program name with args.
 set dummy as; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:3961: checking for $ac_word" >&5
+echo "configure:4008: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_AS'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -3992,7 +4039,7 @@ fi
   # Extract the first word of "${ac_tool_prefix}objdump", so it can be a program name with args.
 set dummy ${ac_tool_prefix}objdump; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:3996: checking for $ac_word" >&5
+echo "configure:4043: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_OBJDUMP'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4024,7 +4071,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "objdump", so it can be a program name with args.
 set dummy objdump; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:4028: checking for $ac_word" >&5
+echo "configure:4075: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_OBJDUMP'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4195,6 +4242,15 @@ else
 fi
 
 
+if test "${ac_cv_header_usb_h}" = "no" -o "${ac_cv_lib_usb}" = "no"; then
+  echo "disabling SM3600 backend"
+  SM3600=
+else
+  echo "enabling SM3600 backend"
+  SM3600=sm3600
+fi
+
+
 if test "${enable_shared}" = "no"; then
   enable_preload=yes
 fi
@@ -4243,7 +4299,7 @@ fi
 # Extract the first word of "sane-config", so it can be a program name with args.
 set dummy sane-config; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:4247: checking for $ac_word" >&5
+echo "configure:4303: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_path_SANE_CONFIG_PATH'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4277,7 +4333,7 @@ else
 fi
 
 echo $ac_n "checking for sane_init in -lsane""... $ac_c" 1>&6
-echo "configure:4281: checking for sane_init in -lsane" >&5
+echo "configure:4337: checking for sane_init in -lsane" >&5
 ac_lib_var=`echo sane'_'sane_init | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -4285,7 +4341,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lsane  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 4289 "configure"
+#line 4345 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -4296,7 +4352,7 @@ int main() {
 sane_init()
 ; return 0; }
 EOF
-if { (eval echo configure:4300: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4356: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -4496,6 +4552,7 @@ s%@QCAM@%$QCAM%g
 s%@V4L@%$V4L%g
 s%@NET@%$NET%g
 s%@SANED@%$SANED%g
+s%@SM3600@%$SM3600%g
 s%@PNM@%$PNM%g
 s%@SANE_CONFIG_PATH@%$SANE_CONFIG_PATH%g
 s%@V_MAJOR@%$V_MAJOR%g
diff --git a/configure.in b/configure.in
index c47d4cf91..9c69c8a9d 100644
--- a/configure.in
+++ b/configure.in
@@ -103,7 +103,7 @@ AC_CHECK_HEADERS(fcntl.h unistd.h libc.h sys/dsreq.h sys/select.h \
     bsd/dev/scsireg.h scsi/sg.h /usr/src/linux/include/scsi/sg.h io/cam/cam.h \
     camlib.h os2.h sys/socket.h sys/io.h asm/io.h gscdds.h sys/hw.h \
     sys/types.h sys/scsi/scsi.h sys/scsi/sgdefs.h sys/scsi/targets/scgio.h \
-    apollo/scsi.h sys/sdi_comm.h sys/passthrudef.h linux/ppdev.h)
+    apollo/scsi.h sys/sdi_comm.h sys/passthrudef.h linux/ppdev.h usb.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
@@ -165,6 +165,7 @@ AC_CHECK_LIB(m,sqrt)
 AC_CHECK_LIB(scsi, scsireq_enter)	# FreeBSD needs this
 AC_CHECK_LIB(cam, cam_open_device)      # FreeBSD 3+ needs this
 AC_CHECK_LIB(syslog, syslog)            # OS/2 needs this
+AC_CHECK_LIB(usb, usb_open)
 
 SANE_CHECK_JPEG
 
@@ -252,6 +253,15 @@ else
 fi
 AC_SUBST(NET)
 AC_SUBST(SANED)
+if test "${ac_cv_header_usb_h}" = "no" -o "${ac_cv_lib_usb}" = "no"; then
+  echo "disabling SM3600 backend"
+  SM3600=
+else
+  echo "enabling SM3600 backend"
+  SM3600=sm3600
+fi
+AC_SUBST(SM3600)
+
 if test "${enable_shared}" = "no"; then
   enable_preload=yes
 fi