Re: Ncurses not compiling - LFS 12.2-systemd

On Thu, 2025-03-20 at 17:35 +0000, kevadesu wrote:
> I am redoing an installation of Linux from Scratch 12.2-systemd (stable)

/* snip */

> /mnt/lfs2/tools/lib/gcc/x86_64-lfs-linux-gnu/14.2.0/../../../../x86_64-lfs-
> linux-gnu/bin/ld: demo: hidden symbol `_Unwind_GetLanguageSpecificData' in /
> mnt/lfs2/tools/lib/gcc/x86_64-lfs-linux-gnu/14.2.0/libgcc.a(unwind-dw2.o) is
> referenced by DSO
> /mnt/lfs2/tools/lib/gcc/x86_64-lfs-linux-gnu/14.2.0/../../../../x86_64-lfs-
> linux-gnu/bin/ld: final link failed: bad value

It shouldn't happen.  Here the DSO is libstdc++.so, and after libstdc++-
pass1 it should contains its own definition for
_Unwind_GetLanguageSpecificData:

$ objdump -t /mnt/build_dir/usr/lib/libstdc++.so | grep GetLanguage
00000000002ed6a0 l     F .text	000000000000000c              _Unwind_GetLanguageSpecificData

I guess you attempted to (re)build chapter 6 ncurses after building
chapter 6 GCC.  Then you'd be mixing up libstdc++.so from chapter 6 and
GCC from chapter 5.  Doing so is not supported (i.e. GCC developers
don't support mixing up libstdc++.so and GCC from different
configurations, and we don't support reordering chapter 6 packages).

-- 
Xi Ruoyao <[email protected]>
School of Aerospace Science and Technology, Xidian University

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