681b34ea4d
daemon provides its own getopt() declaration for non-GNU libcs. This declaration is compatible with musl provided one with C standards before C23. GCC 15 defaults to C23 that makes the empty params declaration equivalent to getopt(void), which is incompatible with musl declaration. Set C standard to gnu99 to restore the previous behaviour. Fixes: https://autobuild.buildroot.org/results/cc3311c86e2b14bf9a9c1ea00056e0b290ec11a3 Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Romain Naour <romain.naour@smile.fr>