diff --git a/c++/examples/h5tutr_extend.cpp b/c++/examples/h5tutr_extend.cpp
index b725f008375..106d5e2b010 100644
--- a/c++/examples/h5tutr_extend.cpp
+++ b/c++/examples/h5tutr_extend.cpp
@@ -112,7 +112,7 @@ main(void)
 
         // Get information to obtain memory dataspace.
         rank            = filespace->getSimpleExtentNdims();
-        herr_t status_n = filespace->getSimpleExtentDims(dimsr);
+        (void)filespace->getSimpleExtentDims(dimsr);
 
         if (H5D_CHUNKED == prop.getLayout())
             rank_chunk = prop.getChunk(rank, chunk_dimsr);
diff --git a/c++/examples/readdata.cpp b/c++/examples/readdata.cpp
index 1deed36a8c0..bfc03eeed25 100644
--- a/c++/examples/readdata.cpp
+++ b/c++/examples/readdata.cpp
@@ -84,7 +84,7 @@ main(void)
              * Get order of datatype and print message if it's a little endian.
              */
             H5std_string order_string;
-            H5T_order_t  order = intype.getOrder(order_string);
+            (void)intype.getOrder(order_string);
             cout << order_string << endl;
 
             /*
@@ -109,7 +109,7 @@ main(void)
          * display them.
          */
         hsize_t dims_out[2];
-        int     ndims = dataspace.getSimpleExtentDims(dims_out, NULL);
+        (void)dataspace.getSimpleExtentDims(dims_out, NULL);
         cout << "rank " << rank << ", dimensions " << (unsigned long)(dims_out[0]) << " x "
              << (unsigned long)(dims_out[1]) << endl;
 
diff --git a/examples/h5_vds-exc.c b/examples/h5_vds-exc.c
index fa6b720ee77..7653280b91e 100644
--- a/examples/h5_vds-exc.c
+++ b/examples/h5_vds-exc.c
@@ -49,7 +49,7 @@ main(void)
             kdims[3] = {KDIM0, KDIM1, KDIM2}, kdims_max[3] = {H5S_UNLIMITED, KDIM1, KDIM2},
             ndims[3] = {NDIM0, NDIM1, NDIM2}, ndims_max[3] = {H5S_UNLIMITED, NDIM1, NDIM2},
             start[3], /* Hyperslab parameters */
-        stride[3], count[3], block[3];
+            count[3], block[3];
     hsize_t      start_out[3], stride_out[3], count_out[3], block_out[3];
     int          k = 2;
     int          n = 3;
diff --git a/examples/h5_vds-exclim.c b/examples/h5_vds-exclim.c
index 58ed1f848c8..30ccf92fa56 100644
--- a/examples/h5_vds-exclim.c
+++ b/examples/h5_vds-exclim.c
@@ -48,7 +48,7 @@ main(void)
     herr_t  status;
     hsize_t vdsdims[3] = {VDSDIM0, VDSDIM1, VDSDIM2}, kdims[3] = {KDIM0, KDIM1, KDIM2},
             ndims[3] = {NDIM0, NDIM1, NDIM2}, start[3], /* Hyperslab parameters */
-        stride[3], count[3], block[3];
+            count[3], block[3];
     hsize_t      start_out[3], stride_out[3], count_out[3], block_out[3];
     int          k = 2;
     int          n = 3;
diff --git a/examples/h5_vds.c b/examples/h5_vds.c
index ceb4956ebd1..96bd8a2bdc6 100644
--- a/examples/h5_vds.c
+++ b/examples/h5_vds.c
@@ -55,7 +55,7 @@ main(void)
     hsize_t vdsdims[2] = {VDSDIM0, VDSDIM1}, /* Virtual datasets dimension */
         dims[1]        = {DIM0},             /* Source datasets dimensions */
         start[2],                            /* Hyperslab parameters */
-        stride[2], count[2], block[2];
+        count[2], block[2];
     hsize_t start_out[2], stride_out[2], count_out[2], block_out[2];
     int     wdata[DIM0],         /* Write buffer for source dataset */
         rdata[VDSDIM0][VDSDIM1], /* Read buffer for virtual dataset */
diff --git a/test/mount.c b/test/mount.c
index 0aee49f9fc7..09ce35e8aa2 100644
--- a/test/mount.c
+++ b/test/mount.c
@@ -27,7 +27,7 @@ static const char *FILENAME[] = {"mount_1", "mount_2", "mount_3", "mount_4", "mo
 #define NX            4
 #define NY            5
 #define NAME_BUF_SIZE 40
-static int bm[NX][NY], bm_out[NX][NY]; /* Data buffers */
+static int bm[NX][NY]; /* Data buffers */
 
 /*-------------------------------------------------------------------------
  * Function:	setup
diff --git a/tools/lib/h5tools.c b/tools/lib/h5tools.c
index 49d88af0697..285d2bb4166 100644
--- a/tools/lib/h5tools.c
+++ b/tools/lib/h5tools.c
@@ -51,7 +51,6 @@ int region_output;    /* region output */
 int oid_output;       /* oid output */
 int data_output;      /* data output */
 int attr_data_output; /* attribute data output */
-static int compound_data;
 
 unsigned           packed_bits_num;    /* number of packed bits to display */
 unsigned           packed_data_offset; /* offset of packed bits to display */