3 files changed, 3 insertions, 2 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-4.c b/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-4.c
index 1558200db..b03d2c88d 100644
--- a/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-4.c
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-4.c
@@ -2,7 +2,7 @@
    operating properly when operations on the same variable are carried
    out in two threads.  */
 /* { dg-do run } */
-/* { dg-options "-std=c11 -pedantic-errors -pthread -D_POSIX_C_SOURCE=200809L" } */
+/* { dg-options "-std=c11 -pedantic-errors -pthread -U_POSIX_C_SOURCE -D_POSIX_C_SOURCE=200809L" } */
 /* { dg-additional-options "-D_XOPEN_SOURCE=600" { target *-*-solaris2.1[0-9]* } }
 /* { dg-require-effective-target pthread } */
 
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-5.c b/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-5.c
index bc87de4cc..e3e0aae4d 100644
--- a/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-5.c
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/atomic/c11-atomic-exec-5.c
@@ -3,7 +3,7 @@
    iterations of the compare-and-exchange loop are needed, exceptions
    get properly cleared).  */
 /* { dg-do run } */
-/* { dg-options "-std=c11 -pedantic-errors -pthread -D_POSIX_C_SOURCE=200809L" } */
+/* { dg-options "-std=c11 -pedantic-errors -pthread -U_POSIX_C_SOURCE -D_POSIX_C_SOURCE=200809L" } */
 /* { dg-additional-options "-D_XOPEN_SOURCE=600" { target *-*-solaris2.1[0-9]* } }
 /* { dg-require-effective-target fenv_exceptions } */
 /* { dg-require-effective-target pthread } */
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/atomic/stdatomic-flag.c b/gcc-4.9/gcc/testsuite/gcc.dg/atomic/stdatomic-flag.c
index c1a63f1b3..515d5d8dd 100644
--- a/gcc-4.9/gcc/testsuite/gcc.dg/atomic/stdatomic-flag.c
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/atomic/stdatomic-flag.c
@@ -1,4 +1,5 @@
 /* Test atomic_flag routines for existence and execution.  */
+/* The test needs a lockless atomic implementation.  */
 /* { dg-do run { xfail hppa*-*-hpux* } } */
 /* { dg-options "-std=c11 -pedantic-errors" } */