[Qemu-devel] [RFC] [PATCHv2 1/2] Adding support for libseccomp in configure

[Eduardo Otubo <otubo@linux.vnet.ibm.com>]

Adding basic options to the configure script to use libseccomp or not.
The default is set to 'no'. If the flag --enable-libseccomp is used, the
script will check for its existence using pkg-config.

v2: As I removed all the code related to seccomp from vl.c, I created
qemu-seccomp.[ch]. I am also making the configure script to add the specific
line to Makefile.obj in order to compile with appropriate support to seccomp.

Signed-off-by: Eduardo Otubo <otubo@linux.vnet.ibm.com>
---
 configure |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/configure b/configure
index c2366ee..145956d 100755
--- a/configure
+++ b/configure
@@ -195,6 +195,7 @@ zlib="yes"
 guest_agent="yes"
 libiscsi=""
 coroutine=""
+libseccomp="no"
 
 # parse CC options first
 for opt do
@@ -825,6 +826,10 @@ for opt do
   ;;
   --disable-guest-agent) guest_agent="no"
   ;;
+  --enable-libseccomp) libseccomp="yes"
+  ;;
+  --disable-libseccomp) libseccomp="no"
+  ;;
   *) echo "ERROR: unknown option $opt"; show_help="yes"
   ;;
   esac
@@ -1109,6 +1114,8 @@ echo "  --disable-usb-redir      disable usb network redirection support"
 echo "  --enable-usb-redir       enable usb network redirection support"
 echo "  --disable-guest-agent    disable building of the QEMU Guest Agent"
 echo "  --enable-guest-agent     enable building of the QEMU Guest Agent"
+echo "  --disable-libseccomp     disable libseccomp support"
+echo "  --enable-libseccomp      enable libseccomp support"
 echo "  --with-coroutine=BACKEND coroutine backend. Supported options:"
 echo "                           gthread, ucontext, sigaltstack, windows"
 echo ""
@@ -1354,6 +1361,17 @@ EOF
 fi
 
 ##########################################
+# libseccomp check
+
+if test "$libseccomp" = "yes" ; then
+    if $pkg_config libseccomp --modversion >/dev/null 2>&1; then
+        LIBS=`$pkg_config --libs libseccomp`
+    else
+        feature_not_found "libseccomp"
+    fi
+fi
+
+##########################################
 # xen probe
 
 if test "$xen" != "no" ; then
@@ -3033,6 +3051,7 @@ echo "usb net redir     $usb_redir"
 echo "OpenGL support    $opengl"
 echo "libiscsi support  $libiscsi"
 echo "build guest agent $guest_agent"
+echo "seccomp support   $libseccomp"
 echo "coroutine backend $coroutine_backend"
 
 if test "$sdl_too_old" = "yes"; then
@@ -3334,6 +3353,12 @@ if test "$libiscsi" = "yes" ; then
   echo "CONFIG_LIBISCSI=y" >> $config_host_mak
 fi
 
+if test "$libseccomp" = "yes" ; then
+  echo "CONFIG_LIBSECCOMP=y" >> $config_host_mak
+  echo "# libseccomp support added by configure script:" >> Makefile.obj
+  echo "common-obj-y += qemu-seccomp.o" >> Makefile.obj
+fi
+
 # XXX: suppress that
 if [ "$bsd" = "yes" ] ; then
   echo "CONFIG_BSD=y" >> $config_host_mak
-- 
1.7.9.5