Work around GCC 7 mis-feature

<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80354> "Poor support to silence
-Wformat-truncation=1"

Change-Id: I486f8a3a12896df3d9506f53bca44a318e23c991
(cherry picked from commit 1b12d5ecb1be36267534e0b980d7c53d50645511)

1 files changed, 7 insertions, 0 deletions

diff --git a/sal/rtl/alloc_arena.cxx b/sal/rtl/alloc_arena.cxx
index 6e0a55dbb886..d6080c93a9f6 100644
--- a/sal/rtl/alloc_arena.cxx
+++ b/sal/rtl/alloc_arena.cxx
@@ -671,6 +671,10 @@ rtl_arena_destructor (void * obj)
 
 /** rtl_arena_activate()
  */
+#if defined __GNUC__ && __GNUC__ >= 7
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-truncation"
+#endif
 rtl_arena_type *
 rtl_arena_activate (
     rtl_arena_type *   arena,
@@ -718,6 +722,9 @@ rtl_arena_activate (
             {
                 size = i * arena->m_quantum;
                 (void) snprintf (namebuf, sizeof(namebuf), "%s_%" SAL_PRIuUINTPTR, arena->m_name, size);
+#if defined __GNUC__ && __GNUC__ >= 7
+#pragma GCC diagnostic pop
+#endif
                 arena->m_qcache_ptr[i - 1] = rtl_cache_create(namebuf, size, 0, nullptr, nullptr, nullptr, nullptr, arena, RTL_CACHE_FLAG_QUANTUMCACHE);
             }
         }