[bug #14874] gcc 4.02 optimization fails buildins.c when filesystem was added to stage1_5_map

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?func=detailitem&item_id=14874>

                 Summary: gcc 4.02 optimization fails buildins.c when
filesystem was added to stage1_5_map
                 Project: GNU GRUB
            Submitted by: None
            Submitted on: Do 27.10.2005 um 09:07
                Category: Compilation
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Gerhard Heift
        Originator Email: address@hidden
             Open/Closed: Open
                 Release: 0.97
         Reproducibility: Every Time
         Planned Release: 

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Details:

I build an LFS and added Reiser4 Support to my kernel.
I patched grub with the reiser patch an build it with the GCC 4.0.2.

# ./configure --prefix=/usr && make && make install

When i wanted to install the new grub into my MBR by:

# grub
grub> root (hd0,1)
 Filesystem type is ext2fs, partition type 0x83

grub> setup (hd0)
 Checking if "/boot/grub/stage1" exists... yes
 Checking if "/boot/grub/stage2" exists... yes
 Checking if "/boot/grub/e2fs_stage1_5" exists... yes
 Running "embed /boot/grub/e2fs_stage1_5 (hd0)"... 23 sectors are embedded.
succeeded
 Running "install /boot/grub/stage1 (hd0) (hd0)1+23 p (hd0,1)/boot/grub/stage
/boot/grub/menu.lst"... failed

Error 15: File not found.

grub>

I checked, where the install was build and found it in stage2/buildins.c,
line 4020. So the part "/boot/grub/stage comes from "config_filename".
I added a few grub_printf("Debug: %s\n", config_filename); and noticed after
rebuilding grub, that the variable changes somehow in line 4016, where the
command sprint_device (installed_drive, installed_partition); is called.

Now i used a clean source-package an rebuild grub and everything worked, when
I installed grub in the MBR. The only modification the reiser4-path did in
stage2/buildins.c, was adding a filesystem to the "stage1_5_map" variable.
So i added a filesystem "foobar" to the map and rebuild grub. When I tried to
install grub in the MBR the error happened again.

The next step was trying an older compiler, I used Knoppix 4.0 with gcc 3.3.4
and it works.
After this I tried to modified the CFLAGS. With -O0 or -O1 the installation
worked, with -Os or -O2 not.



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