build: fix check for selinux's allow_execstack on Fedora 16

Fedora 16 mounts selinux at /sys/fs/selinux, instead of the
traditional /selinux.  Check both locations for the selinux
filesystem in make.bash

Fixes #2448.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5373077

diff --git a/src/make.bash b/src/make.bash
index 013852570caa9eeadcf8872cf2d9f7848e3e65aa..3580d2a0bdeef5e35164cd454a48ac655e79d1e8 100755 (executable)
--- a/src/make.bash
+++ b/src/make.bash
@@ -50,21 +50,26 @@ chmod +x "$GOBIN"/gomake
 # TODO(brainman): delete this after 01/01/2012.
 rm -f "$GOBIN"/gotest  # remove old bash version of gotest on Windows
 
-if [ -d /selinux -a -f /selinux/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
-       if ! cat /selinux/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
-               echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
-               echo "Go. You can enable the features that Go needs via the following "
-               echo "command (as root):"
-               echo "  # setsebool -P allow_execstack 1"
-               echo
-               echo "Note that this affects your system globally! "
-               echo
-               echo "The build will continue in five seconds in case we "
-               echo "misdiagnosed the issue..."
+# on Fedora 16 the selinux filesystem is mounted at /sys/fs/selinux,
+# so loop through the possible selinux mount points
+for se_mount in /selinux /sys/fs/selinux
+do
+       if [ -d $se_mount -a -f $se_mount/booleans/allow_execstack -a -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
+               if ! cat $se_mount/booleans/allow_execstack | grep -c '^1 1$' >> /dev/null ; then
+                       echo "WARNING: the default SELinux policy on, at least, Fedora 12 breaks "
+                       echo "Go. You can enable the features that Go needs via the following "
+                       echo "command (as root):"
+                       echo "  # setsebool -P allow_execstack 1"
+                       echo
+                       echo "Note that this affects your system globally! "
+                       echo
+                       echo "The build will continue in five seconds in case we "
+                       echo "misdiagnosed the issue..."
 
-               sleep 5
+                       sleep 5
+               fi
        fi
-fi
+done
 
 (
        cd "$GOROOT"/src/pkg;