[PATCH 1/2] Fix warnings reported with -Wreturn-type after patching PR c/48116.

["Marcin Baczyński" <marbacz@gmail.com>]

libgomp/ChangeLog:

   * fortran.c (omp_set_default_device_, omp_set_default_device_8):
    don't put a void expression in a return,
   * oacc-mem.c (acc_free): likewise,
   * target.c (GOMP_target, GOMP_target_data, GOMP_target_data_ext):
    likewise.
---
 libgomp/fortran.c  |  4 ++--
 libgomp/oacc-mem.c |  5 ++++-
 libgomp/target.c   | 15 ++++++++++++---
 3 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/libgomp/fortran.c b/libgomp/fortran.c
index 6b1ef37..1eb9340 100644
--- a/libgomp/fortran.c
+++ b/libgomp/fortran.c
@@ -526,13 +526,13 @@ omp_get_partition_place_nums_8_ (int64_t *place_nums)
 void
 omp_set_default_device_ (const int32_t *device_num)
 {
-  return omp_set_default_device (*device_num);
+  omp_set_default_device (*device_num);
 }
 
 void
 omp_set_default_device_8_ (const int64_t *device_num)
 {
-  return omp_set_default_device (TO_INT (*device_num));
+  omp_set_default_device (TO_INT (*device_num));
 }
 
 int32_t
diff --git a/libgomp/oacc-mem.c b/libgomp/oacc-mem.c
index bd4b62b..87f9435 100644
--- a/libgomp/oacc-mem.c
+++ b/libgomp/oacc-mem.c
@@ -129,7 +129,10 @@ acc_free (void *d)
   struct gomp_device_descr *acc_dev = thr->dev;
 
   if (acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
-    return free (d);
+    {
+      free (d);
+      return;
+    }
 
   gomp_mutex_lock (&acc_dev->lock);
 
diff --git a/libgomp/target.c b/libgomp/target.c
index 48b9ab8..bf2fa5f 100644
--- a/libgomp/target.c
+++ b/libgomp/target.c
@@ -1426,7 +1426,10 @@ GOMP_target (int device, void (*fn) (void *), const void *unused,
       /* All shared memory devices should use the GOMP_target_ext function.  */
       || devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM
       || !(fn_addr = gomp_get_target_fn_addr (devicep, fn)))
-    return gomp_target_fallback (fn, hostaddrs);
+    {
+      gomp_target_fallback (fn, hostaddrs);
+      return;
+    }
 
   struct target_mem_desc *tgt_vars
     = gomp_map_vars (devicep, mapnum, hostaddrs, NULL, sizes, kinds, false,
@@ -1609,7 +1612,10 @@ GOMP_target_data (int device, const void *unused, size_t mapnum,
   if (devicep == NULL
       || !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
       || (devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM))
-    return gomp_target_data_fallback ();
+    {
+      gomp_target_data_fallback ();
+      return;
+    }
 
   struct target_mem_desc *tgt
     = gomp_map_vars (devicep, mapnum, hostaddrs, NULL, sizes, kinds, false,
@@ -1628,7 +1634,10 @@ GOMP_target_data_ext (int device, size_t mapnum, void **hostaddrs,
   if (devicep == NULL
       || !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
       || devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
-    return gomp_target_data_fallback ();
+    {
+      gomp_target_data_fallback ();
+      return;
+    }
 
   struct target_mem_desc *tgt
     = gomp_map_vars (devicep, mapnum, hostaddrs, NULL, sizes, kinds, true,
-- 
2.8.3