Fix -Wreturn-type fallout.

2017-11-06  Martin Liska  <mliska@suse.cz>

	* c-c++-common/cilk-plus/AN/pr57541-2.c (foo1): Return a value
	for functions with non-void return type, or change type to void,
	or add -Wno-return-type for test.
	(foo2): Likewise.
	* c-c++-common/cilk-plus/AN/pr57541.c (foo): Likewise.
	(foo1): Likewise.
	* c-c++-common/cilk-plus/CK/errors.c: Likewise.
	* c-c++-common/cilk-plus/CK/pr60197.c: Likewise.
	* c-c++-common/cilk-plus/CK/spawn_in_return.c: Likewise.
	* c-c++-common/fold-masked-cmp-1.c (test_pic): Likewise.
	(test_exe): Likewise.
	* c-c++-common/fold-masked-cmp-2.c (test_exe): Likewise.
	* g++.dg/cilk-plus/AN/builtin_fn_mutating_tplt.cc (my_func): Likewise.
	* g++.dg/cilk-plus/CK/pr68997.cc (fa2): Likewise.
	* g++.dg/eh/sighandle.C (dosegv): Likewise.
	* g++.dg/ext/vector14.C (foo): Likewise.
	(main): Likewise.
	* g++.dg/graphite/pr41305.C: Likewise.
	* g++.dg/graphite/pr42930.C: Likewise.
	* g++.dg/opt/pr46640.C (struct QBasicAtomicInt): Likewise.
	(makeDir): Likewise.
	* g++.dg/other/i386-8.C (foo): Likewise.
	* g++.dg/pr45788.C: Likewise.
	* g++.dg/pr64688.C (at_c): Likewise.
	* g++.dg/pr65032.C (G::DecodeVorbis): Likewise.
	* g++.dg/pr71633.C (c3::fn2): Likewise.
	* g++.dg/stackprotectexplicit2.C (A): Likewise.
	* g++.old-deja/g++.law/weak.C (main): Likewise.
2017-11-06  Martin Liska  <mliska@suse.cz>

	* testsuite/libgomp.c++/loop-2.C: Return a value
	for functions with non-void return type, or change type to void,
	or add -Wno-return-type for test.
	* testsuite/libgomp.c++/loop-4.C: Likewise.
	* testsuite/libgomp.c++/parallel-1.C: Likewise.
	* testsuite/libgomp.c++/shared-1.C: Likewise.
	* testsuite/libgomp.c++/single-1.C: Likewise.
	* testsuite/libgomp.c++/single-2.C: Likewise.
2017-11-06  Martin Liska  <mliska@suse.cz>

	* testsuite/27_io/basic_fstream/cons/char/path.cc (main):
	  Return a value for functions with non-void return type,
	  or change type to void, or add -Wno-return-type for test.
	* testsuite/27_io/basic_ifstream/cons/char/path.cc (main):
	Likewise.
	* testsuite/27_io/basic_ofstream/open/char/path.cc (main):
	Likewise.

From-SVN: r254451

33 files changed, 103 insertions, 20 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 1c3a2fa..1d5ba34 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,34 @@
+2017-11-06  Martin Liska  <mliska@suse.cz>
+
+	* c-c++-common/cilk-plus/AN/pr57541-2.c (foo1): Return a value
+	for functions with non-void return type, or change type to void,
+	or add -Wno-return-type for test.
+	(foo2): Likewise.
+	* c-c++-common/cilk-plus/AN/pr57541.c (foo): Likewise.
+	(foo1): Likewise.
+	* c-c++-common/cilk-plus/CK/errors.c: Likewise.
+	* c-c++-common/cilk-plus/CK/pr60197.c: Likewise.
+	* c-c++-common/cilk-plus/CK/spawn_in_return.c: Likewise.
+	* c-c++-common/fold-masked-cmp-1.c (test_pic): Likewise.
+	(test_exe): Likewise.
+	* c-c++-common/fold-masked-cmp-2.c (test_exe): Likewise.
+	* g++.dg/cilk-plus/AN/builtin_fn_mutating_tplt.cc (my_func): Likewise.
+	* g++.dg/cilk-plus/CK/pr68997.cc (fa2): Likewise.
+	* g++.dg/eh/sighandle.C (dosegv): Likewise.
+	* g++.dg/ext/vector14.C (foo): Likewise.
+	(main): Likewise.
+	* g++.dg/graphite/pr41305.C: Likewise.
+	* g++.dg/graphite/pr42930.C: Likewise.
+	* g++.dg/opt/pr46640.C (struct QBasicAtomicInt): Likewise.
+	(makeDir): Likewise.
+	* g++.dg/other/i386-8.C (foo): Likewise.
+	* g++.dg/pr45788.C: Likewise.
+	* g++.dg/pr64688.C (at_c): Likewise.
+	* g++.dg/pr65032.C (G::DecodeVorbis): Likewise.
+	* g++.dg/pr71633.C (c3::fn2): Likewise.
+	* g++.dg/stackprotectexplicit2.C (A): Likewise.
+	* g++.old-deja/g++.law/weak.C (main): Likewise.
+
 2017-11-06  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/gcov: New directory.
diff --git a/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541-2.c b/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541-2.c
index 83325a7..89a3d57 100644
--- a/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541-2.c
+++ b/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541-2.c
@@ -2,13 +2,13 @@
 /* { dg-do compile } */
 /* { dg-options "-fcilkplus" } */
 
-int foo1 ()
+void foo1 ()
 {
   int a;
   a = __sec_reduce_add (1); /* { dg-error "Invalid builtin arguments" } */
 }
 
-int foo2 ()
+void foo2 ()
 {
   int a;
   a = __sec_reduce_add (); /* { dg-error "Invalid builtin arguments" } */
diff --git a/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541.c b/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541.c
index a956d0e..b47de1e 100755
--- a/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541.c
+++ b/gcc/testsuite/c-c++-common/cilk-plus/AN/pr57541.c
@@ -4,8 +4,7 @@
 
 int A[10];
 
-int foo () {
-
+void foo () {
   /* C compiler uses the term "undeclared" whereas C++ compiler uses
     "not declared".  Thus, grepping for declared seem to be the easiest.  */
   char c = (char)N; /* { dg-error "declared" } */
@@ -15,12 +14,8 @@ int foo () {
   A[l:s:c];
 }
 
-int foo1 (int N) {
-
+void foo1 (int N) {
   char c = (char)N;
   short s = (short)N;
   A[l:s:c]; /* { dg-error "declared" } */
 }
-
-
-
diff --git a/gcc/testsuite/c-c++-common/cilk-plus/CK/errors.c b/gcc/testsuite/c-c++-common/cilk-plus/CK/errors.c
index b1e336e..d637924 100644
--- a/gcc/testsuite/c-c++-common/cilk-plus/CK/errors.c
+++ b/gcc/testsuite/c-c++-common/cilk-plus/CK/errors.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fcilkplus" } */
+/* { dg-options "-fcilkplus -Wno-return-type" } */
 
 int func_2(void);
 
diff --git a/gcc/testsuite/c-c++-common/cilk-plus/CK/pr60197.c b/gcc/testsuite/c-c++-common/cilk-plus/CK/pr60197.c
index 2b47d1e..301a6f2 100644
--- a/gcc/testsuite/c-c++-common/cilk-plus/CK/pr60197.c
+++ b/gcc/testsuite/c-c++-common/cilk-plus/CK/pr60197.c
@@ -1,6 +1,6 @@
 /* PR c/60197 */
 /* { dg-do compile } */
-/* { dg-options "-fcilkplus" } */
+/* { dg-options "-fcilkplus -Wno-return-type" } */
 
 extern int foo (void);
 extern int bar (int);
diff --git a/gcc/testsuite/c-c++-common/cilk-plus/CK/spawn_in_return.c b/gcc/testsuite/c-c++-common/cilk-plus/CK/spawn_in_return.c
index 14b7eef..602971e 100644
--- a/gcc/testsuite/c-c++-common/cilk-plus/CK/spawn_in_return.c
+++ b/gcc/testsuite/c-c++-common/cilk-plus/CK/spawn_in_return.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-fcilkplus" } */
+/* { dg-options "-fcilkplus -Wno-return-type" } */
 
 int main (void)
 {
diff --git a/gcc/testsuite/c-c++-common/fold-masked-cmp-1.c b/gcc/testsuite/c-c++-common/fold-masked-cmp-1.c
index c56adc4..658cc09 100644
--- a/gcc/testsuite/c-c++-common/fold-masked-cmp-1.c
+++ b/gcc/testsuite/c-c++-common/fold-masked-cmp-1.c
@@ -29,13 +29,15 @@ int result;
 void test_pic (struct bfd_link_info *info)
 {
   if (bfd_link_pic (info))
-    result++;
+    result++;  
 }
 
 int test_exe (struct bfd_link_info *info)
 {
   if (bfd_link_executable (info))
     result++;
+
+  return 0;
 }
 
 /* { dg-final { scan-assembler-times "testn?b" 2 } } */
diff --git a/gcc/testsuite/c-c++-common/fold-masked-cmp-2.c b/gcc/testsuite/c-c++-common/fold-masked-cmp-2.c
index a14bceb..c95cc56 100644
--- a/gcc/testsuite/c-c++-common/fold-masked-cmp-2.c
+++ b/gcc/testsuite/c-c++-common/fold-masked-cmp-2.c
@@ -36,6 +36,8 @@ int test_exe (struct bfd_link_info *info)
 {
   if (bfd_link_executable (info))
     result++;
+
+  return 0;
 }
 
 /* { dg-final { scan-assembler-times "testn?b" 2 } } */
diff --git a/gcc/testsuite/g++.dg/cilk-plus/AN/builtin_fn_mutating_tplt.cc b/gcc/testsuite/g++.dg/cilk-plus/AN/builtin_fn_mutating_tplt.cc
index db81912..111a2a2 100644
--- a/gcc/testsuite/g++.dg/cilk-plus/AN/builtin_fn_mutating_tplt.cc
+++ b/gcc/testsuite/g++.dg/cilk-plus/AN/builtin_fn_mutating_tplt.cc
@@ -15,6 +15,8 @@ T my_func (T *x, T y)
     *x = y;
   else
     *x = *x;
+
+  return T();
 }
 
 template <class T> T my_func (T *x, T y);
diff --git a/gcc/testsuite/g++.dg/cilk-plus/CK/pr68997.cc b/gcc/testsuite/g++.dg/cilk-plus/CK/pr68997.cc
index b442bf9..a9a8a51 100644
--- a/gcc/testsuite/g++.dg/cilk-plus/CK/pr68997.cc
+++ b/gcc/testsuite/g++.dg/cilk-plus/CK/pr68997.cc
@@ -16,7 +16,7 @@ struct A2 {
 };
 
 A2 fa2 () {
-  A2 ();
+  return A2 ();
 }
 
 struct B1 {
diff --git a/gcc/testsuite/g++.dg/eh/sighandle.C b/gcc/testsuite/g++.dg/eh/sighandle.C
index 5c4995e..c220002 100644
--- a/gcc/testsuite/g++.dg/eh/sighandle.C
+++ b/gcc/testsuite/g++.dg/eh/sighandle.C
@@ -12,6 +12,7 @@ void sighandler (int signo, siginfo_t * si, void * uc)
 char * dosegv ()
 {    
   * ((volatile int *)0) = 12;
+  return 0;
 }
 
 int main ()
diff --git a/gcc/testsuite/g++.dg/ext/vector14.C b/gcc/testsuite/g++.dg/ext/vector14.C
index 8e79210..eecff39 100644
--- a/gcc/testsuite/g++.dg/ext/vector14.C
+++ b/gcc/testsuite/g++.dg/ext/vector14.C
@@ -8,7 +8,11 @@
 
 #define vector __attribute__((vector_size(16)))
 
-template<int N> vector signed int foo (vector float value) {}
+template<int N> vector signed int foo (vector float value)
+{
+  vector signed int a;
+  return a;
+}
 
 template<int> void foo (float) {}
 
@@ -19,4 +23,6 @@ main ()
   float f;
   foo<1> (v);
   foo<1> (f);
+
+  return 0;
 }
diff --git a/gcc/testsuite/g++.dg/graphite/pr41305.C b/gcc/testsuite/g++.dg/graphite/pr41305.C
index 6a30b0e..756b126 100644
--- a/gcc/testsuite/g++.dg/graphite/pr41305.C
+++ b/gcc/testsuite/g++.dg/graphite/pr41305.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-O3 -floop-interchange -Wno-conversion-null" }
+// { dg-options "-O3 -floop-interchange -Wno-conversion-null -Wno-return-type" }
 
 void __throw_bad_alloc ();
 
diff --git a/gcc/testsuite/g++.dg/graphite/pr42930.C b/gcc/testsuite/g++.dg/graphite/pr42930.C
index c1150ce..e569cea 100644
--- a/gcc/testsuite/g++.dg/graphite/pr42930.C
+++ b/gcc/testsuite/g++.dg/graphite/pr42930.C
@@ -1,4 +1,4 @@
-/* { dg-options "-O1 -floop-block" } */
+/* { dg-options "-O1 -floop-block -Wno-return-type" } */
 
 typedef unsigned char byte;
 typedef unsigned int uint;
diff --git a/gcc/testsuite/g++.dg/opt/pr46640.C b/gcc/testsuite/g++.dg/opt/pr46640.C
index 1c25778..b55afd4 100644
--- a/gcc/testsuite/g++.dg/opt/pr46640.C
+++ b/gcc/testsuite/g++.dg/opt/pr46640.C
@@ -7,6 +7,7 @@ struct QBasicAtomicInt
   bool deref ()
   {
     asm volatile ("":"=m" (i), "=qm" (j));
+    return true;
   }
 };
 
@@ -41,4 +42,6 @@ bool makeDir (unsigned len)
         return false;
       i = pos;
     }
+
+  return true;
 }
diff --git a/gcc/testsuite/g++.dg/other/i386-8.C b/gcc/testsuite/g++.dg/other/i386-8.C
index cf833a5..a9465ef 100644
--- a/gcc/testsuite/g++.dg/other/i386-8.C
+++ b/gcc/testsuite/g++.dg/other/i386-8.C
@@ -19,4 +19,6 @@ foo (float *x, short *y)
   __m64 c = _mm_cvtps_pi16 (b);
   __builtin_memcpy (y, &c, sizeof (short) * 4);
   y[0] = bar (y[0]);
+
+  return 0;
 }
diff --git a/gcc/testsuite/g++.dg/pr45788.C b/gcc/testsuite/g++.dg/pr45788.C
index 0f4db20..9148585 100644
--- a/gcc/testsuite/g++.dg/pr45788.C
+++ b/gcc/testsuite/g++.dg/pr45788.C
@@ -1,5 +1,5 @@
 // { dg-do compile { target i?86-*-* x86_64-*-* } }
-// { dg-options "-O3 -fwhole-program -msse2" }
+// { dg-options "-O3 -fwhole-program -msse2 -Wno-return-type" }
 
 typedef long unsigned int __darwin_size_t;
 typedef __darwin_size_t size_t;
diff --git a/gcc/testsuite/g++.dg/pr64688.C b/gcc/testsuite/g++.dg/pr64688.C
index 3525e49b..bf85f1a 100644
--- a/gcc/testsuite/g++.dg/pr64688.C
+++ b/gcc/testsuite/g++.dg/pr64688.C
@@ -24,7 +24,10 @@ template <typename> struct F;
 template <typename> struct G;
 template <typename, typename, int> struct H;
 template <typename Element, typename Layout> struct H<Element, Layout, 3> {};
-template <int, typename E, typename L, int N> unsigned char at_c(H<E, L, N>) {}
+template <int, typename E, typename L, int N> unsigned char at_c(H<E, L, N>)
+{
+  return 0;
+}
 template <typename> class I;
 template <typename> class J;
 template <typename> class K;
diff --git a/gcc/testsuite/g++.dg/pr65032.C b/gcc/testsuite/g++.dg/pr65032.C
index a62f50b..d6b6768d 100644
--- a/gcc/testsuite/g++.dg/pr65032.C
+++ b/gcc/testsuite/g++.dg/pr65032.C
@@ -84,4 +84,6 @@ G::DecodeVorbis (int *p1)
       mDecodedAudioFrames -= b;
       fn2 (b);
     }
+
+  return nsresult();
 }
diff --git a/gcc/testsuite/g++.dg/pr71633.C b/gcc/testsuite/g++.dg/pr71633.C
index 48e9c98..8852695 100644
--- a/gcc/testsuite/g++.dg/pr71633.C
+++ b/gcc/testsuite/g++.dg/pr71633.C
@@ -20,6 +20,7 @@ class c3 : c1, c2
 
 int *c3::fn2 () const
 {
+  return 0;
 }
 
 int *c3::fn3 (int p) const
diff --git a/gcc/testsuite/g++.dg/stackprotectexplicit2.C b/gcc/testsuite/g++.dg/stackprotectexplicit2.C
index 9cf9ab9..35d9e88 100644
--- a/gcc/testsuite/g++.dg/stackprotectexplicit2.C
+++ b/gcc/testsuite/g++.dg/stackprotectexplicit2.C
@@ -7,6 +7,7 @@ int A()
 {
 	int A[23];
 	char b[22];
+	return 0;
 }
 
 int __attribute__((stack_protect)) B()
@@ -24,4 +25,4 @@ int __attribute__((stack_protect)) c()
 }
 
 
-/* { dg-final { scan-assembler-times "stack_chk_fail" 2 } } */
\ No newline at end of file
+/* { dg-final { scan-assembler-times "stack_chk_fail" 2 } } */
diff --git a/gcc/testsuite/g++.old-deja/g++.law/weak.C b/gcc/testsuite/g++.old-deja/g++.law/weak.C
index 49132ad..52444e7 100644
--- a/gcc/testsuite/g++.old-deja/g++.law/weak.C
+++ b/gcc/testsuite/g++.old-deja/g++.law/weak.C
@@ -11,10 +11,12 @@
 
 std::istream x (0);
 
+int
 main () {
   x.get();
   std::putc(0, 0);
   std::fgets(0, 0, 0); 
   x.get((char*) 0, 0);
+  return 0;
 }
 
diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index f68604c..7c0e808 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,14 @@
+2017-11-06  Martin Liska  <mliska@suse.cz>
+
+	* testsuite/libgomp.c++/loop-2.C: Return a value
+	for functions with non-void return type, or change type to void,
+	or add -Wno-return-type for test.
+	* testsuite/libgomp.c++/loop-4.C: Likewise.
+	* testsuite/libgomp.c++/parallel-1.C: Likewise.
+	* testsuite/libgomp.c++/shared-1.C: Likewise.
+	* testsuite/libgomp.c++/single-1.C: Likewise.
+	* testsuite/libgomp.c++/single-2.C: Likewise.
+
 2017-10-31  Tom de Vries  <tom@codesourcery.com>
 
 	* plugin/plugin-hsa.c (HSA_LOG): Remove semicolon after
diff --git a/libgomp/testsuite/libgomp.c++/loop-2.C b/libgomp/testsuite/libgomp.c++/loop-2.C
index ea3dc58..77144b8 100644
--- a/libgomp/testsuite/libgomp.c++/loop-2.C
+++ b/libgomp/testsuite/libgomp.c++/loop-2.C
@@ -15,6 +15,7 @@ void parloop (int *a)
     a[i] = i + 3;
 }
 
+int
 main()
 {
   int i, a[N];
diff --git a/libgomp/testsuite/libgomp.c++/loop-4.C b/libgomp/testsuite/libgomp.c++/loop-4.C
index 731f234..a940854 100644
--- a/libgomp/testsuite/libgomp.c++/loop-4.C
+++ b/libgomp/testsuite/libgomp.c++/loop-4.C
@@ -1,5 +1,6 @@
 extern "C" void abort (void);
 
+int
 main()
 {
   int i, a;
diff --git a/libgomp/testsuite/libgomp.c++/parallel-1.C b/libgomp/testsuite/libgomp.c++/parallel-1.C
index 3c93147..ce338d0 100644
--- a/libgomp/testsuite/libgomp.c++/parallel-1.C
+++ b/libgomp/testsuite/libgomp.c++/parallel-1.C
@@ -8,6 +8,7 @@ foo (void)
   return 10;
 }
 
+int
 main ()
 {
   int A = 0;
diff --git a/libgomp/testsuite/libgomp.c++/shared-1.C b/libgomp/testsuite/libgomp.c++/shared-1.C
index 334a553..2f61daa 100644
--- a/libgomp/testsuite/libgomp.c++/shared-1.C
+++ b/libgomp/testsuite/libgomp.c++/shared-1.C
@@ -53,6 +53,7 @@ parallel (int a, int b)
     abort ();
 }
 
+int
 main()
 {
   parallel (1, 2);
diff --git a/libgomp/testsuite/libgomp.c++/single-1.C b/libgomp/testsuite/libgomp.c++/single-1.C
index e318a48..221236f 100644
--- a/libgomp/testsuite/libgomp.c++/single-1.C
+++ b/libgomp/testsuite/libgomp.c++/single-1.C
@@ -1,5 +1,6 @@
 extern "C" void abort (void);
 
+int
 main()
 {
   int i = 0;
diff --git a/libgomp/testsuite/libgomp.c++/single-2.C b/libgomp/testsuite/libgomp.c++/single-2.C
index c2dd228..d24b1d8 100644
--- a/libgomp/testsuite/libgomp.c++/single-2.C
+++ b/libgomp/testsuite/libgomp.c++/single-2.C
@@ -7,6 +7,7 @@ struct X
   int c;
 };
 
+int
 main()
 {
   int i = 0;
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 70061e9..a9a19a4 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,13 @@
+2017-11-06  Martin Liska  <mliska@suse.cz>
+
+	* testsuite/27_io/basic_fstream/cons/char/path.cc (main):
+	  Return a value for functions with non-void return type,
+	  or change type to void, or add -Wno-return-type for test.
+	* testsuite/27_io/basic_ifstream/cons/char/path.cc (main):
+	Likewise.
+	* testsuite/27_io/basic_ofstream/open/char/path.cc (main):
+	Likewise.
+
 2017-11-06  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* testsuite/20_util/optional/cons/deduction.cc: Avoid -Wreturn-type
diff --git a/libstdc++-v3/testsuite/27_io/basic_fstream/cons/char/path.cc b/libstdc++-v3/testsuite/27_io/basic_fstream/cons/char/path.cc
index 4442c28..51337eb 100644
--- a/libstdc++-v3/testsuite/27_io/basic_fstream/cons/char/path.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_fstream/cons/char/path.cc
@@ -45,4 +45,5 @@ main()
 {
   test01();
   test02();
+  return 0;
 }
diff --git a/libstdc++-v3/testsuite/27_io/basic_ifstream/cons/char/path.cc b/libstdc++-v3/testsuite/27_io/basic_ifstream/cons/char/path.cc
index 24286f5..a0de4ba 100644
--- a/libstdc++-v3/testsuite/27_io/basic_ifstream/cons/char/path.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_ifstream/cons/char/path.cc
@@ -45,4 +45,5 @@ main()
 {
   test01();
   test02();
+  return 0;
 }
diff --git a/libstdc++-v3/testsuite/27_io/basic_ofstream/open/char/path.cc b/libstdc++-v3/testsuite/27_io/basic_ofstream/open/char/path.cc
index a3fc0c7f..38078c9 100644
--- a/libstdc++-v3/testsuite/27_io/basic_ofstream/open/char/path.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_ofstream/open/char/path.cc
@@ -47,4 +47,5 @@ main()
 {
   test01();
   test02();
+  return 0;
 }