Fix compiler warnings

Author: james-d-mitchell

configure.ac

@@ -68,7 +68,7 @@ AS_IF([ test "$enable_code_coverage" = "yes" ], [
 ])
 
 
-# Enable compiler warnings 
+# Enable compiler warnings
 
 AC_ARG_ENABLE([compile-warnings],
     [AS_HELP_STRING([--enable-compile-warnings], [enable compiler warnings])],
@@ -104,7 +104,7 @@ AX_CHECK_BLISS
 
 # Check whether to use -mpopcnt and __builtin_ctzl
 AC_ARG_WITH([intrinsics],
-            [AS_HELP_STRING([--without-intrinsics], 
+            [AS_HELP_STRING([--without-intrinsics],
                             [do not use compiler intrinsics even if available])]
            )
 

extern/bliss-0.73/bliss_C.cc

@@ -25,6 +25,12 @@ extern "C" {
   along with bliss.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wold-style-cast"
+#pragma clang diagnostic ignored "-Wsign-compare"
+#endif
+
 struct bliss_digraphs_graph_struct {
   bliss_digraphs::Graph* g;
 };
@@ -229,3 +235,7 @@ void bliss_digraphs_free_blissstats(BlissStats *stats)
     free(stats->group_size);
 #endif
 }
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif

extern/bliss-0.73/defs.cc

@@ -1,6 +1,6 @@
-#include <cstdlib>
-#include <cstdio>
 #include "defs.hh"
+#include <cstdio>
+#include <cstdlib>
 
 /*
   Copyright (c) 2003-2015 Tommi Junttila
@@ -21,18 +21,25 @@
   along with bliss.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wformat-nonliteral"
+#pragma clang diagnostic ignored "-Wmissing-noreturn"
+#endif
 namespace bliss_digraphs {
 
-void
-fatal_error(const char* fmt, ...)
-{
-  va_list ap;
-  va_start(ap, fmt);
-  fprintf(stderr,"Bliss fatal error: ");
-  vfprintf(stderr, fmt, ap);
-  fprintf(stderr, "\nAborting!\n");
-  va_end(ap);
-  exit(1);
-}
-
-}
+  void fatal_error(const char* fmt, ...) {
+    va_list ap;
+    va_start(ap, fmt);
+    fprintf(stderr, "Bliss fatal error: ");
+    vfprintf(stderr, fmt, ap);
+    fprintf(stderr, "\nAborting!\n");
+    va_end(ap);
+    exit(1);
+  }
+
+}  // namespace bliss_digraphs
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif