GCC 7.1 introduces a new -Wformat-truncation warning
flag that reports if it thinks the maximum possible
size of the formatted output will exceed the provided
fixed buffer. This is enabled automatically by the
-Wformat warning flag. There are quite a few places
hit by this in libvirt which need rewriting. This is
non-trivial work in some places, so temporarily
disable the new warning until those fixes can be
implemented.
Signed-off-by: Daniel P. Berrange <berrange@xxxxxxxxxx>
---
m4/virt-compile-warnings.m4 | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4
index d7bb172f3..fa0940fc6 100644
--- a/m4/virt-compile-warnings.m4
+++ b/m4/virt-compile-warnings.m4
@@ -169,6 +169,10 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
wantwarn="$wantwarn -Wno-format"
fi
+ # -Wformat enables this by default, and we should keep it,
+ # but need to rewrite various areas of code first
+ wantwarn="$wantwarn -Wno-format-truncation"
+
# This should be < 256 really. Currently we're down to 4096,
# but using 1024 bytes sized buffers (mostly for virStrerror)
# stops us from going down further
--
2.13.1
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