Made all C headers includeable from C++.

dfs.h

@@ -20,6 +20,16 @@
 #ifndef DFS_H_INCLUDED
 #define DFS_H_INCLUDED
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 void dfs (int size, int *ia, int *ja, int *ncolors, int *color, int* work);
 
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif

partition.h

@@ -20,6 +20,10 @@
 #ifndef PARTITION_H_INCLUDED
 #define PARTITION_H_INCLUDED
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int
 partition_unif_idx(int ndims, int nc,
                    const int *fine_d,
@@ -50,4 +54,9 @@ partition_localidx(int nblk, const int *pi, const int *inverse,
 int
 partition_split_disconnected(int nc, int nneigh, const int *neigh,
                              int *p);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif  /* PARTITION_H_INLCUDED */