diff --git a/configure.ac b/configure.ac
index 5e56e16b..6ccd009a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -250,6 +250,11 @@ if test "x$GCC" = "xyes" ; then
   JE_CFLAGS_ADD([-Wsign-compare])
   JE_CFLAGS_ADD([-Wundef])
   JE_CFLAGS_ADD([-Wno-format-zero-length])
+  dnl This warning triggers on the use of the universal zero initializer, which
+  dnl is a very handy idiom for things like the tcache static initializer (which
+  dnl has lots of nested structs).  See the discussion at.
+  dnl https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119
+  JE_CFLAGS_ADD([-Wno-missing-braces])
   JE_CFLAGS_ADD([-pipe])
   JE_CFLAGS_ADD([-g3])
 elif test "x$je_cv_msvc" = "xyes" ; then
diff --git a/include/jemalloc/internal/tcache_types.h b/include/jemalloc/internal/tcache_types.h
index 9fd39263..c30a5339 100644
--- a/include/jemalloc/internal/tcache_types.h
+++ b/include/jemalloc/internal/tcache_types.h
@@ -51,7 +51,7 @@ typedef struct tcaches_s tcaches_t;
 #define TCACHE_GC_INCR_BYTES 65536U
 
 /* Used in TSD static initializer only. Real init in tsd_tcache_data_init(). */
-#define TCACHE_ZERO_INITIALIZER {{0}}
+#define TCACHE_ZERO_INITIALIZER {0}
 
 /* Used in TSD static initializer only. Will be initialized to opt_tcache. */
 #define TCACHE_ENABLED_ZERO_INITIALIZER false
diff --git a/src/prof.c b/src/prof.c
index 36945bdb..9c2357c8 100644
--- a/src/prof.c
+++ b/src/prof.c
@@ -113,6 +113,21 @@ bool			prof_booted = false;
 
 /******************************************************************************/
 
+/*
+ * If profiling is off, then PROF_DUMP_FILENAME_LEN is 1, so we'll end up
+ * calling strncpy with a size of 0, which triggers a -Wstringop-truncation
+ * warning (strncpy can never actually be called in this case, since we bail out
+ * much earlier when config_prof is false).  This function works around the
+ * warning to let us leave the warning on.
+ */
+static inline void
+prof_strncpy(char *UNUSED dest, const char *UNUSED src, size_t UNUSED size) {
+	cassert(config_prof);
+#ifdef JEMALLOC_PROF
+	strncpy(dest, src, size);
+#endif
+}
+
 static bool
 prof_tctx_should_destroy(tsdn_t *tsdn, prof_tctx_t *tctx) {
 	malloc_mutex_assert_owner(tsdn, tctx->tdata->lock);
@@ -692,7 +707,7 @@ prof_dump_prefix_set(tsdn_t *tsdn, const char *prefix) {
 	}
 	assert(prof_dump_prefix != NULL);
 
-	strncpy(prof_dump_prefix, prefix, PROF_DUMP_FILENAME_LEN - 1);
+	prof_strncpy(prof_dump_prefix, prefix, PROF_DUMP_FILENAME_LEN - 1);
 	prof_dump_prefix[PROF_DUMP_FILENAME_LEN - 1] = '\0';
 	malloc_mutex_unlock(tsdn, &prof_dump_filename_mtx);