Commit ab9ef6cf1825eded75153c556d933639314bde65

Zack Weinberg 2020-09-11T14:23:10

Sync ChannelDefs.pm from autoconf. ChannelDefs.pm *ought* to be kept in sync between automake and autoconf, because it defines the set of valid -W options, and autoreconf assumes that it can pass arbitrary -W options to all of the tools it invokes. However, it isn’t covered by either project’s ‘make fetch’ and it hasn’t actually *been* in sync for more than 17 years. This patch manually brings over all of the changes made on the autoconf side. Most importantly, there is a new warnings channel ‘cross’, for warnings related to cross-compilation. Also, the ‘usage’ function now *returns* the text to be put into a usage message, instead of printing it itself. (This is necessary on autoconf’s side.) * lib/Automake/ChannelDefs.pm: Sync from autoconf. (cross): New warnings channel. (portability-recursive): Document. (usage): Now returns the text to be printed, instead of printing it. (parse_warnings): Second argument may now be a list.