[Bug c++/35212] New: g++ omits generating debugging symbols for some local variables

["connerta at appliedbiosystems dot com" <gcc-bugzilla at gcc dot gnu dot org>]

g++ fails to generate debugging symbols for some local variables.

Here is the compiler invocation command that produces the bug:

firmware@doorstop:~/code$ g++ -v -Wall -O0 -g -save-temps -o stagefile
stagefile.cc -lm
Using built-in specs.
Target: i486-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr
--enable-shared --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --enable-nls
--with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2
--enable-clocale=gnu --enable-libstdcxx-debug --enable-mpfr
--enable-targets=all --enable-checking=release --build=i486-linux-gnu
--host=i486-linux-gnu --target=i486-linux-gnu
Thread model: posix
gcc version 4.2.3 20071123 (prerelease) (Debian 4.2.2-4)
 /usr/lib/gcc/i486-linux-gnu/4.2.3/cc1plus -E -quiet -v -D_GNU_SOURCE
stagefile.cc -mtune=generic -Wall -fworking-directory -O0 -fpch-preprocess -o
stagefile.ii
ignoring nonexistent directory "/usr/local/include/i486-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/i486-linux-gnu/4.2.3/../../../../i486-linux-gnu/include"
ignoring nonexistent directory "/usr/include/i486-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/4.2
 /usr/include/c++/4.2/i486-linux-gnu
 /usr/include/c++/4.2/backward
 /usr/local/include
 /usr/lib/gcc/i486-linux-gnu/4.2.3/include
 /usr/include
End of search list.
 /usr/lib/gcc/i486-linux-gnu/4.2.3/cc1plus -fpreprocessed stagefile.ii -quiet
-dumpbase stagefile.cc -mtune=generic -auxbase stagefile -g -O0 -Wall -version
-o stagefile.s
GNU C++ version 4.2.3 20071123 (prerelease) (Debian 4.2.2-4) (i486-linux-gnu)
        compiled by GNU C version 4.2.3 20071123 (prerelease) (Debian 4.2.2-4).
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=128352
Compiler executable checksum: 3dbb0d64f7247875ecc86216cf2aff16
 as -V -Qy -o stagefile.o stagefile.s
GNU assembler version 2.18.0 (i486-linux-gnu) using BFD version (GNU Binutils
for Debian) 2.18.0.20080103
 /usr/lib/gcc/i486-linux-gnu/4.2.3/collect2 --eh-frame-hdr -m elf_i386
--hash-style=both -dynamic-linker /lib/ld-linux.so.2 -o stagefile
/usr/lib/gcc/i486-linux-gnu/4.2.3/../../../../lib/crt1.o
/usr/lib/gcc/i486-linux-gnu/4.2.3/../../../../lib/crti.o
/usr/lib/gcc/i486-linux-gnu/4.2.3/crtbegin.o
-L/usr/lib/gcc/i486-linux-gnu/4.2.3 -L/usr/lib/gcc/i486-linux-gnu/4.2.3
-L/usr/lib/gcc/i486-linux-gnu/4.2.3/../../../../lib -L/lib/../lib
-L/usr/lib/../lib -L/usr/lib/gcc/i486-linux-gnu/4.2.3/../../.. stagefile.o
-lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc
/usr/lib/gcc/i486-linux-gnu/4.2.3/crtend.o
/usr/lib/gcc/i486-linux-gnu/4.2.3/../../../../lib/crtn.o

Debugging information for the variable "name_i_can_easily_spot" isn't produced.


-- 
           Summary: g++ omits generating debugging symbols for some local
                    variables
           Product: gcc
           Version: 4.2.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: connerta at appliedbiosystems dot com
 GCC build triplet: i486-linux-gnu
  GCC host triplet: i486-linux-gnu
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35212