Whenever a new kernel is installed, GRUB must be reconfigured to recognize it. This can be done using grub-mkconfig , as shown below, or can be done manually. On the other hand, when GRUB itself has been upgraded it does need to be reinstalled on the boot drive, but usually does not need to be reconfigured. This page contains changes which are not marked for translation. Other languages:.
Official documentation. Package information. Be sure to use the --newuse --deep options as shown in the emerge section below. Warning If grub-mkconfig does not report any found entries then no entries were found.
In this case GRUB will offer no boot selections when upon system restart which may be a tricky, time consuming situation to resolve. Make sure the output is satisfactory before restarting the system. Note When the system is meant to dual-boot with another pre-installed operating system, such as Microsoft Windows, make sure that the Linux bootloader can coexist or dual-boot both operating systems. On PCs it is recommended to use the same boot method as the pre-installed system, e.
If the mode is changed, e. This technique, however, has specific constraints. Warning Normally, a GPT partition table will always also create an MBR partition table which holds only one partition spanning over the whole disk.
This will ensure that older software doesn't mistake the disk as 'empty'. By defining hybrid partitions, this protective feature of the GPT is sacrificed! Legacy software will no longer see used space when analyzing the hybrid MBR. The BIOS boot partition should not be regularly mounted on the system i. Note The 0x hexadecimal prefix does not need to be entered for GPT when using fdisk.
In the firmware setup it is often called 'Legacy Mode' oder 'Compatibility Mode'. For bit UEFI systems use efi For bit use efi Important In order for GRUB to install properly, the EFI directory must be mounted and the efivars kernel module must be loaded before the grub-install command will complete successfully.
Note For more troubleshooting, please refer to the Troubleshooting sub-article. Categories : Bootloaders Software. Add extra documentation API, Javadoc, etc.
It is recommended to enable per package instead of globally. The file generated by grub-mkconfig. See the scripting reference in the GRUB manual for supported features.
Be aware that modifications to this file won't persist to the next time grub-mkconfig is run. These scripts use the current system shell and therefore can use any supported syntax.
It may be necessary to disable or add scripts. For instance, to add menu items that couldn't be automatically generated. Looks like you dont have that. I would also check the library paths look back in the thread there is the correct library paths etc for gcc version It really looks like something has been deleted particularly a previous version of gcc that it was linked to. Try find the broken directory link or file manually, this might be a pain so try the lvecd option.
If it has gone like that i would also check your file-system and start looking into why, test your hard disks and backup data. Posted: Thu Mar 03, pm Post subject:. Thank you for tips. When unpacking the kernel tarball on a freshly formatted partition, it dies with IO errors Posted: Fri Mar 11, pm Post subject:. So today mpfr Of course when I tried upgrading bind-tools I got the "configure: error: C compiler cannot create executables".
Caligatio n00b Joined: 13 Feb Posts: Posted: Sat Mar 12, am Post subject:. And then I can recompile GCC and after that remove the symlink? F1r31c3r wrote:. Thought i would pull this thread up to date this is a important addition as i broke my system doing a emerge --depclean I had 3 compilers on my system version 3.
I would also advise on opening a second terminal I was in X windows so multiple terminals were open cd each gcc directory listed in the 05gcc file to double check they exist and contain files this is a good way of checking that gcc is installed and the version it points to exists.
Most important find i have found to fix this problem something not mentioned in Roberts post was after modifying all the directories in the files make sure you run: Quote:. If you don't do step 3, it will undo your changes from step 1 when you run emerge again. If you don't do step 3, it will undo your.
Posted: Sat Apr 30, pm Post subject:. This is usually caused by doing an emerge world that includes a gcc upgrade. What happens is, the new gcc is compiled, but the ebuild fails to switch your system to the new compiler. Before trying any of the solutions above, try doing: Code:. I'll admit I haven't read this whole thread, but a good chunk of it. I've had my Gentoo installation working fine for months, since my last major wipe and reinstall almost a year ago. During one of the world updates, something must have happened to my gcc, but I can't find any problems.
I also haven't changed any settings. For both of the users who reported problems: if you still need help, please follow the instructions shown in the Portage output. Pastebin the relevant log files so that we can investigate why configure fails.
Hi Hu, thank you for responding - however following the suggestion from the portage output does not solve the issue. As I wrote: portage asks the user to try Code:. Posted: Wed May 31, pm Post subject:. Same error, same situation. Doing as portage output suggests results in a repeat of the error. I'm not saying because I have the same error the situation is the same - we have the same situation, and the same error] Incidentally, the line I posted worked.
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