[PATCH] Do not use enum class as constructor priority

[Nadav Har'El]

According to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59281 gcc 6 no
longer allows to use enum class as constructor priorities, as we did in
include/osv/prio.hh. Constructor priorities must be integers, and enum
class do not support conversion to int.

The solution is to go back to old-style enum, which do have conversion to
int. Put this enum inside a namespace so we can still use names like
init_prio::sched and don't need to change any of the callers.

Fixes #769

Signed-off-by: Nadav Har'El <n...@scylladb.com>
---
 include/osv/prio.hh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/osv/prio.hh b/include/osv/prio.hh
index 1a3d0eb..c3cb474 100644
--- a/include/osv/prio.hh
+++ b/include/osv/prio.hh
@@ -8,7 +8,8 @@
 #ifndef PRIO_HH_
 #define  PRIO_HH_
 
-enum class init_prio : int {
+namespace init_prio {
+enum {
     dtb = 101,
     console,
     sort,
@@ -32,5 +33,6 @@ enum class init_prio : int {
     malloc_pools,
     idt,
 };
+}
 
 #endif
-- 
2.5.5

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