GF18: Emerge fails after upgrading gcc. libstdc++.la missing

[kallamej]

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• Q: I have upgraded gcc and now emerge fails with messages such as

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  grep: /usr/lib/gcc-lib/i686-pc-linux-gnu/<old_version>/libstdc++.la: No such file or directory.

  What should I do?
  
  A: This typically happens because some packages have hard coded the path to libstdc++.la. Run

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  fix_libtool_files.sh <old_version>

  to fix it. Note that you may have to run

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  env-update && source /etc/profile

  first. Note also that you may run into problems if you have changed the default root umask.
• Q: That's all nice, but the CHOST (i686-pc-linux-gnu above) is incorrect as well.
  
  A: Then you have to pass the --oldarch flag to fix_libtool_files.sh:

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  fix_libtool_files.sh <old_version> --oldarch <incorrect_CHOST>

  Note that if you're thinking about changing the CHOST setting in /etc/make.conf it should be made with caution.
• Further reading:
  • libstdc++.la: No such file or directory - errors and tips
  • [resolved] Problems after upgrade gcc to 3.3.5
  • People upgrading gcc from <=4.1.0 to >=4.1.0-r1 may want to read [bug]73435#c207[/bug]. This file has as of gcc-4.1.0-r1 been intentionally removed.

2005-03-22: Added --oldarch
2005-04-15: Added Further reading
2006-05-16: Added note about 4.1.0 revision update issue