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Pass -Werror=shadow in args of cc.compiles in meson.build otherwise test will always succeed, causing -Werror=shadow to be passed, even on older gcc versions. GCC 4.8 changed the behaviour of -Werror=shadow to no longer complain about local variable declariations shadowing functions, which systemd has. From the changelog: The option -Wshadow no longer warns if a declaration shadows a function declaration, unless the former declares a function or pointer to function, because this is a common and valid case in real-world code. https://www.gnu.org/software/gcc/gcc-4.8/changes.html Fixes: - http://autobuild.buildroot.org/results/ffd71c473d3b29618c18cd2e04705370266696f2 [Peter: extend commit message, add gcc 4.8 link] Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>