util: limit gnu_printf format attribute to gcc >= 4.4.0

The gnu_printf format attribute was introduced in gcc 4.4.0
https://gcc.gnu.org/legacy-ml/gcc-help/2012-02/msg00225.html.

Use the printf format attribute on earlier versions of gcc and clang
(which claims to be gcc 4.2.1 in builtin defines) to fix the build with
gcc 4.2.1.

Fixes: 588a29f ("util: use gnu_printf format attribute")
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Message-Id: <20210206100110.75228-1-jsg@jsg.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
1 file changed