If someone runs `meson setup --buildtype plain` meson ignores warning_level=2 that is in our meson.build file. The implication is that Meson will not automatically add -Wall which enables -Wformat. This breaks building libvirt from git with the buildtype set to plain. There is an issue reported [1] to not ignore warning_level silently and the change to ignore it was done by upstream commit [2]. [1] <https://github.com/mesonbuild/meson/issues/7399> [2] <https://github.com/mesonbuild/meson/commit/8ee1c9a07a3a35e3ed262fbc358fd8... Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- meson.build | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/meson.build b/meson.build index e193166a9b..f38785eeae 100644 --- a/meson.build +++ b/meson.build @@ -503,10 +503,6 @@ cc_flags_disabled = [ # In meson this is specified using 'c_std=gnu99' in project() function. '-std=gnu99', - # In meson this is specified using 'warning_level=2' in project() function. - '-Wall', - '-Wextra', - # don't care about C++ compiler compat '-Wc++-compat', '-Wabi', @@ -573,6 +569,21 @@ cc_flags_disabled = [ '-Wsuggest-attribute=malloc', ] +# In meson this is specified using 'warning_level=2' in project() function. +# However, meson silently ignores 'warning_level' option with 'buildtype=plain' +# so we have to enable them explicitly. +if get_option('buildtype') == 'plain' + cc_flags += [ + '-Wall', + '-Wextra', + ] +else + cc_flags_disabled += [ + '-Wall', + '-Wextra', + ] +endif + foreach flag : cc_flags_disabled if cc_flags.contains(flag) error('@0@ is disabled but listed in cc_flags'.format(flag)) -- 2.26.2