Add build dependency for libseccomp

We're going to use libseccomp instead of creating the raw BPF program,
because we have different syscall numbers on different architectures.

Although our initial seccomp rules will be quite small it really doesn't
make sense to generate the raw BPF program because we need to duplicate
it and/or make branches on every single architecture we want to suuport.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 91ed9947ab..1a5ad660ab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -194,6 +194,15 @@ AC_SUBST(HAVE_SODIUM, [$have_sodium])
 PKG_CHECK_MODULES([LIBLZMA], [liblzma], [CXXFLAGS="$LIBLZMA_CFLAGS $CXXFLAGS"])
 
 
+# Look for libseccomp, required for Linux sandboxing.
+if test "$sys_name" = linux; then
+  PKG_CHECK_MODULES([LIBSECCOMP], [libseccomp],
+                    [CXXFLAGS="$LIBSECCOMP_CFLAGS $CXXFLAGS"])
+#  AC_CHECK_LIB([seccomp], [seccomp_init], [true],
+#    [AC_MSG_ERROR([Nix requires libseccomp for sandboxing.  See https://github.com/seccomp/libseccomp.])])
+fi
+
+
 # Look for aws-cpp-sdk-s3.
 AC_LANG_PUSH(C++)
 AC_CHECK_HEADERS([aws/s3/S3Client.h],