gas: emit GNU-stack note so that stack is not executable

GNU ld uses the presence of these notes to determine the flags of
the final GNU_STACK program header. If they are present in every
object, then the resulting executable's GNU_STACK uses flags RW
instead of RWE.

Reported by Érico Nogueira Rolim.

1 files changed, 1 insertions, 0 deletions

diff --git a/gas.c b/gas.c
index 227c297..339154e 100644
--- a/gas.c
+++ b/gas.c
@@ -122,4 +122,5 @@ gasemitfin(FILE *f)
 		stash = b->link;
 		free(b);
 	}
+	fprintf(f, ".section .note.GNU-stack,\"\",@progbits\n");
 }