Allow use of public API from C++

src/lxc/attach_options.h

@@ -27,6 +27,10 @@
 
 #include <sys/types.h>
 
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
 /*!
  * LXC environment policy.
  */
@@ -168,4 +172,8 @@ extern int lxc_attach_run_command(void* payload);
  */
 extern int lxc_attach_run_shell(void* payload);
 
+#ifdef  __cplusplus
+}
+#endif
+
 #endif

src/lxc/lxccontainer.h

@@ -28,6 +28,10 @@
 #include <stdbool.h>
 #include <stdlib.h>
 
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
 #define LXC_CLONE_KEEPNAME        (1 << 0) /*!< Do not edit the rootfs to change the hostname */
 #define LXC_CLONE_KEEPMACADDR     (1 << 1) /*!< Do not change the MAC address on network interfaces */
 #define LXC_CLONE_SNAPSHOT        (1 << 2) /*!< Snapshot the original filesystem(s) */
@@ -871,4 +875,8 @@ int list_active_containers(const char *lxcpath, char ***names, struct lxc_contai
  */
 int list_all_containers(const char *lxcpath, char ***names, struct lxc_container ***cret);
 
+#ifdef  __cplusplus
+}
+#endif
+
 #endif