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-rw-r--r--gcc/ada/env.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/ada/env.c b/gcc/ada/env.c
index ac6e835df9f..d9486977433 100644
--- a/gcc/ada/env.c
+++ b/gcc/ada/env.c
@@ -29,8 +29,11 @@
* *
****************************************************************************/
-/* Tru64 UNIX <stdlib.h> declares unsetenv() only if _BSD. */
+/* Tru64 UNIX V4.0F <stdlib.h> declares unsetenv() only if AES_SOURCE (which
+ is plain broken, this should be _AES_SOURCE instead as everywhere else;
+ Tru64 UNIX V5.1B declares it only if _BSD. */
#if defined (__alpha__) && defined (__osf__)
+#define AES_SOURCE
#define _BSD
#endif