_POSIX_C_SOURCE is predefined on hppa-hpux, so it needs to be undefined before
it can be redefined.

Tested on hppa2.0-hp-hpux11.11 and hppa64-hp-hpux11.11. Committed to trunk and
4.9 branch.

Dave
--
John David Anglin       dave.ang...@bell.net


2014-08-07  John David Anglin  <dang...@gcc.gnu.org>

        * gcc.dg/atomic/c11-atomic-exec-4.c: Undefine _POSIX_C_SOURCE before
        defining in dg-options.
        * gcc.dg/atomic/c11-atomic-exec-5.c: Likewise.

Index: gcc.dg/atomic/c11-atomic-exec-4.c
===================================================================
--- gcc.dg/atomic/c11-atomic-exec-4.c   (revision 213683)
+++ gcc.dg/atomic/c11-atomic-exec-4.c   (working copy)
@@ -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 } */
 
Index: gcc.dg/atomic/c11-atomic-exec-5.c
===================================================================
--- gcc.dg/atomic/c11-atomic-exec-5.c   (revision 213683)
+++ gcc.dg/atomic/c11-atomic-exec-5.c   (working copy)
@@ -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-add-options ieee } */
 /* { dg-additional-options "-mfp-trap-mode=sui" { target alpha*-*-* } } */
 /* { dg-additional-options "-D_XOPEN_SOURCE=600" { target *-*-solaris2.1[0-9]* 
} } */

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