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[RFC] cygport: split debuginfo packages

Attached is a first draft of a patch to support split debuginfo packages automatically in cygport. I'm looking for comments and suggestions, particularly on the following:

1) I propose adding a Debug category for all -debuginfo packages.

2) This places the debuginfo from e.g. /usr/bin/cygfoo-X.dll into /usr/lib/debug/usr/bin/cygfoo-X.dbg. Unfortunately, when gdb finds library dependencies, they show up as e.g. /cygdrive/c/cygwin/bin/cygfoo-X.dll instead of as in /usr/bin, causing gdb to not find the debug file. There are at least three solutions to this:

a. Fix (cygwin or) gdb to use /usr paths over /cygdrive/c/cygwin paths;
b. Move debug files to a .debug subdirectory (e.g. /usr/bin/.debug/cygfoo-X.dbg);
c. Move debug files alongside binaries (e.g. /usr/bin/cygfoo-X.dbg).

3) Sources referenced by the .dbg files are placed under /usr/src/debug/${PF}, as indicated by the -fdebug-prefix-map flags. Unfortunately, this breaks in-tree debugging (e.g. a noinst test or sample application). AFAICS, binutils doesn't support changing the debug-prefix-map after the fact. Does anyone have any suggestions on how to handle this?

4) The resulting binaries are somewhat larger, having only been --strip-debug'ed; what more is lost by --strip-unneeded or --strip-all to justify the larger binaries?



Attachment: 0001-debuginfo.patch
Description: application/itunes-itlp

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