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pkgmgt: Note that rebuilding GMP and libffi is not enough to convert a complete LFS system to be used for a less capable CPU

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Xi Ruoyao
2025-09-27 00:52:50 +08:00
parent 693cf29d31
commit 6d5f106c11
1 changed files with 10 additions and 1 deletions
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chapter08/pkgmgt.xml
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@@ -391,7 +391,16 @@ make DESTDIR=/usr/pkg/libfoo/1.1 install</userinput></screen>
overriding the architecture-specific optimization to produce libraries
suitable for both the host system and the system(s) where you'll deploy
the LFS system. Otherwise you'll get <computeroutput>Illegal
Instruction</computeroutput> errors running LFS.</para></important>
Instruction</computeroutput> errors running LFS.</para>
<para>The GMP build system stores the architecture-specific optimization
option used to build GMP into <filename>gmp.h</filename>, and the build
system of some package using GMP can read it from the header and use it
when building the package itself. At least the MPFR build system is
known to do so. Thus simply rebuilding GMP on a complete LFS system
is not enough: you'll need to recompile MPFR and maybe other packages
using GMP if you want to <quote>convert</quote> a complete LFS system
to be used for a different CPU.</para></important>
<para>Finally, the new system has to be made bootable via <xref
linkend="ch-bootable-grub"/>.</para>