Commit bd09c76a76288998ce5f804bffca3c690232d1c8
2020-09-18T13:40:20
Use WARNINGS=none to suppress warnings from autom4te runs. aclocal uses autom4te in trace mode to scan configure.ac for macros whose definition is not yet available. It has a kludge to prevent this from producing spurious warnings, but a cleaner, fully backward compatible, way to get the same effect is to set WARNINGS=none in the environment and not pass down any -W options. (This is better than passing -Wnone on the command line because it automatically inherits to any subprocesses started by autom4te.) Perl’s ‘local’ feature can be used to make the enviironment variable setting temporary, reverting to the previous value when we exit the function. automake also runs autom4te (technically autoconf) in trace mode; warnings from this invocation will not be *spurious*, but in the common case where the person running automake is going to run autoconf next, they will be duplicated. Therefore, make the same change to automake. * bin/aclocal.in (trace_used_macros) * bin/automake.in (scan_autoconf_traces): Use “local $ENV{WARNINGS}='none'” to suppress warnings from autom4te.