Found the following significant warnings:
  zeroin.c:54:8: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/EL.Rcheck/00install.out' for details.
Found the following significant warnings:
  zeroin.c:54:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/EL.Rcheck/00install.out’ for details.
Found the following significant warnings:
  zeroin.c:54:8: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
See ‘/data/gannet/ripley/R/packages/tests-clang/EL.Rcheck/00install.out’ for details.
Found the following significant warnings:
  zeroin.c:54:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-devel/EL.Rcheck/00install.out’ for details.