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e0b46d086a
Add TRACE_FUNC to trace the file, line, and name of the calling function. File and function names don't have to be duplicated in a TRACE statement with this (they tend to become inaccurate as functions are renamed and the TRACE statement is forgotten). Add DEBUG_STACK to dump the bash stack to debug output. Configure bash with --enable-debugger. Bash doesn't actually include the entire debugger, this is just some supporting variables for it. Evidently, BASH_SOURCE[n] is only set within a function if this is enabled. I couldn't find this indicated in any documentation, but it happened in practice. Compressed initrd size only increased by 2560 bytes for librem_mini_v2, I think that is fine. This also gives us BASH_ARGC/BASH_ARGV which might be useful for diagnostics. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>