Jack Howarth wrote: > On Tue, Aug 05, 2008 at 11:31:13AM -0500, Peter O'Gorman wrote: >> Jack Howarth wrote: >>> Does anyone know why gdb appears to be unable to find the debug >>> information >>> for libstdc++ in gcc 4.3 and gcc trunk on darwin9? This has been reported >>> before >>> as... >>> >>> https://trac.macports.org/ticket/16102 >>> >>> Under current gcc trunk, using Apple's current Xcode 3.1's gdb reports the >>> errors of the form... >>> >>> warning: Could not find object file >>> "/sw/src/fink.build/gcc44-4.3.999-20080803/darwin_objdir/i686-apple-darwin9/libstdc++-v3/src/.libs/libstdc++.lax/libmath.a/signbit.o" >>> - no debug information available for >>> "../../../../gcc-4.4-20080803/libstdc++-v3/libmath/signbit.c". >>> >>> when I try to run a binary linked to libstdc++ in gdb. My gcc build >>> directory doesn't >>> have a libstdc++.lax directory left in it. Is this a flaw in the .la files >>> for gcc? >>> Thanks in advance for any advice. I am trying to puzzle out if this is a >>> gcc bug or >>> a gdb bug so that I can file a radar report against gdb if it is the later. >>> Jack >>> >> The debug information is stored in the object files. Libtool uses a >> convenience library, and, because darwin's linked does not have the >> equivalent of --whole-archive --no-whole-archive to ensure that all >> members of specific archives are loaded, it unpacks the archive and adds >> all the objects. Having created the output, it then deletes these >> objects, leaving the debugger with no object files. >> >> This is "fixed" in recent GNU libtool by calling dsymutil on the newly >> created shared library. I have not checked if gcc's version of libtool >> has this change. I'll check when I have time and submit a patch if that >> is not the case.
> Peter, > I am still seeing this problem with the current gcc trunk after the > libtool update. Are we still messing some additional changes for darwin > to eliminate these problems with Apple's gdb not properly finding the > object files for libstdc++? > Jack Hi Jack, How are you starting GDB? Is your build tree still around with all the object files in it? Peter -- Peter O'Gorman http://pogma.com
