diff --git a/winsup/ChangeLog b/winsup/ChangeLog
index 470bb2377..b5bd59c44 100644
--- a/winsup/ChangeLog
+++ b/winsup/ChangeLog
@@ -1,3 +1,7 @@
+Thu May 25 18:28:10 2000  Christopher Faylor <cgf@cygnus.com>
+
+	* configure.in: Don't assume that cinstall directory exists.
+
 2000-05-24  DJ Delorie  <dj@cygnus.com>
 
 	* Makefile.common (%.o): further simplify, add "..." to make it
diff --git a/winsup/configure b/winsup/configure
index 3ffd02bd9..2ddccc055 100755
--- a/winsup/configure
+++ b/winsup/configure
@@ -28,6 +28,7 @@ program_suffix=NONE
 program_transform_name=s,x,x,
 silent=
 site=
+sitefile=
 srcdir=
 target=NONE
 verbose=
@@ -142,6 +143,7 @@ Configuration:
   --help                  print this message
   --no-create             do not create output files
   --quiet, --silent       do not print \`checking...' messages
+  --site-file=FILE        use FILE as the site file
   --version               print the version of autoconf that created configure
 Directory and file names:
   --prefix=PREFIX         install architecture-independent files in PREFIX
@@ -312,6 +314,11 @@ EOF
   -site=* | --site=* | --sit=*)
     site="$ac_optarg" ;;
 
+  -site-file | --site-file | --site-fil | --site-fi | --site-f)
+    ac_prev=sitefile ;;
+  -site-file=* | --site-file=* | --site-fil=* | --site-fi=* | --site-f=*)
+    sitefile="$ac_optarg" ;;
+
   -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
     ac_prev=srcdir ;;
   -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
@@ -477,12 +484,16 @@ fi
 srcdir=`echo "${srcdir}" | sed 's%\([^/]\)/*$%\1%'`
 
 # Prefer explicitly selected file to automatically selected ones.
-if test -z "$CONFIG_SITE"; then
-  if test "x$prefix" != xNONE; then
-    CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
-  else
-    CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+if test -z "$sitefile"; then
+  if test -z "$CONFIG_SITE"; then
+    if test "x$prefix" != xNONE; then
+      CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
+    else
+      CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+    fi
   fi
+else
+  CONFIG_SITE="$sitefile"
 fi
 for ac_site_file in $CONFIG_SITE; do
   if test -r "$ac_site_file"; then
@@ -572,7 +583,7 @@ else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; }
 fi
 
 echo $ac_n "checking host system type""... $ac_c" 1>&6
-echo "configure:576: checking host system type" >&5
+echo "configure:587: checking host system type" >&5
 
 host_alias=$host
 case "$host_alias" in
@@ -593,7 +604,7 @@ host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 echo "$ac_t""$host" 1>&6
 
 echo $ac_n "checking target system type""... $ac_c" 1>&6
-echo "configure:597: checking target system type" >&5
+echo "configure:608: checking target system type" >&5
 
 target_alias=$target
 case "$target_alias" in
@@ -611,7 +622,7 @@ target_os=`echo $target | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
 echo "$ac_t""$target" 1>&6
 
 echo $ac_n "checking build system type""... $ac_c" 1>&6
-echo "configure:615: checking build system type" >&5
+echo "configure:626: checking build system type" >&5
 
 build_alias=$build
 case "$build_alias" in
@@ -643,7 +654,7 @@ fi
 # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
 set dummy ${ac_tool_prefix}gcc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:647: checking for $ac_word" >&5
+echo "configure:658: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -675,7 +686,7 @@ if test -n "$ac_tool_prefix"; then
   # Extract the first word of "gcc", so it can be a program name with args.
 set dummy gcc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:679: checking for $ac_word" >&5
+echo "configure:690: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -711,7 +722,7 @@ if test -z "$CC"; then
   # Extract the first word of "cc", so it can be a program name with args.
 set dummy cc; ac_word=$2
 echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
-echo "configure:715: checking for $ac_word" >&5
+echo "configure:726: checking for $ac_word" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -760,7 +771,7 @@ fi
 fi
 
 echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
-echo "configure:764: checking whether we are using GNU C" >&5
+echo "configure:775: checking whether we are using GNU C" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -769,7 +780,7 @@ else
   yes;
 #endif
 EOF
-if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:773: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:784: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
   ac_cv_prog_gcc=yes
 else
   ac_cv_prog_gcc=no
@@ -784,7 +795,7 @@ if test $ac_cv_prog_gcc = yes; then
   ac_save_CFLAGS="$CFLAGS"
   CFLAGS=
   echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
-echo "configure:788: checking whether ${CC-cc} accepts -g" >&5
+echo "configure:799: checking whether ${CC-cc} accepts -g" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -815,11 +826,12 @@ else
 fi
 
 
-SUBDIRS="cygwin w32api mingw utils doc cinstall"
+SUBDIRS="cygwin w32api mingw utils doc"
+test -d cinstall && SUBDIRS="$SUBDIRS cinstall"
 subdirs="$SUBDIRS"
 
 echo $ac_n "checking whether ${MAKE-make} sets \${MAKE}""... $ac_c" 1>&6
-echo "configure:823: checking whether ${MAKE-make} sets \${MAKE}" >&5
+echo "configure:835: checking whether ${MAKE-make} sets \${MAKE}" >&5
 set dummy ${MAKE-make}; ac_make=`echo "$2" | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_prog_make_${ac_make}_set'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
diff --git a/winsup/configure.in b/winsup/configure.in
index 582a52115..608700249 100755
--- a/winsup/configure.in
+++ b/winsup/configure.in
@@ -57,7 +57,8 @@ AC_CANONICAL_SYSTEM
 
 LIB_AC_PROG_CC
 
-SUBDIRS="cygwin w32api mingw utils doc cinstall"
+SUBDIRS="cygwin w32api mingw utils doc"
+test -d cinstall && SUBDIRS="$SUBDIRS cinstall"
 AC_CONFIG_SUBDIRS($SUBDIRS)
 AC_PROG_MAKE_SET