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On Jun 21 01:24, Yaakov (Cygwin/X) wrote: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;
I just had a quick look into this issue and it turns out that GDB doesn't use cygwin_conv_path in all circumstances. Rather, it uses realpath in most circumstances.
The problem is a long standing behaviour (since 2005) of realpath: A DOS path is always converted to its /cygdrive equivalent.
I think the right thing to do here is to fix realpath.
3) Sources referenced by the .dbg files are placed under /usr/src/debug/${PF}, as indicated by the -fdebug-prefix-map flags.
I don't quite understand that. The sources are not part of the debuginfo package. And usually you'd want to reference the sources from your builds. Wouldn't /usr/src/${PVR}/src make more sense?
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?
Well, there's the "dir" command on the GDB command line...
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?
I don't know. Did you look with objdump -h what the difference is?
unstripped 4766253 bytes split .dbg file 3765748 --strip-debug 1479875 --strip-unneeded 1069624 --strip-all 1024014
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