[PATCH 1/1] Work around array out of bounds warning in mkdeps

[Andreas Krebbel]

This suppresses an array out of bounds warning in mkdeps.c as proposed
by Martin Sebor in the bugzilla.

array subscript 2 is outside array bounds of ‘const char [2]’

Since this warning does occur during bootstrap it currently breaks
werror builds on IBM Z.

The problem can be reproduced also on x86_64 by changing the inlining
threshold using: --param max-inline-insns-auto=80

Bootstrapped and regression tested on x86_64 and IBM Z.

Ok for mainline?

libcpp/ChangeLog:

2019-12-17  Andreas Krebbel  <kreb...@linux.ibm.com>

        PR tree-optimization/92176
        * mkdeps.c (deps_add_default_target):
---
 libcpp/mkdeps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcpp/mkdeps.c b/libcpp/mkdeps.c
index 147aa909be7..d1001e30e19 100644
--- a/libcpp/mkdeps.c
+++ b/libcpp/mkdeps.c
@@ -268,7 +268,7 @@ deps_add_default_target (class mkdeps *d, const char *tgt)
     return;
 
   if (tgt[0] == '\0')
-    deps_add_target (d, "-", 1);
+    d->targets.push (xstrdup ("-"));
   else
     {
 #ifndef TARGET_OBJECT_SUFFIX
-- 
2.23.0