Add autodetect for container support.

1 files changed, 17 insertions, 4 deletions

diff --git a/scripts/genconfig.sh b/scripts/genconfig.sh
index 126e52ef..1911efc6 100755
--- a/scripts/genconfig.sh
+++ b/scripts/genconfig.sh
@@ -4,16 +4,29 @@
 # before menuconfig.  (It's called again from scripts/make.sh just to be sure.)
 
 mkdir -p generated
+OUTFILE=generated/Config.in
 
-function genconfig()
+genconfig()
 {
-  for i in $(echo toys/*.c | sort)
+  # Probe for container support on target
+
+  echo -e "# container support\nconfig TOYBOX_CONTAINER\n\tbool" || return 1
+  $CC -c -xc -o /dev/null - 2>/dev/null << EOF
+    #include <sched.h>
+    int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET;
+EOF
+  [ $? -eq 0 ] && DEFAULT=y || DEFAULT=n
+  echo -e "\tdefault $DEFAULT\n" || return 1
+
+  # extract config stanzas from each command source file, in alphabetical order
+
+  for i in $(ls -1 toys/*.c)
   do
     # Grab the config block for Config.in
     echo "# $i"
-    sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || exit 1
+    sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1
     echo
   done
 }
 
-genconfig > generated/Config.in
+genconfig > generated/Config.in || rm "$OUTFILE"