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rust: temporary rustc: export LD_LIBRARY_PATH for LLVM Pass 1

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Rustc Pass 1 links to LLVM Pass 1, but the building system does not set
rpath for LLVM shared library (even if rpath = true is used). Explicitly
tell the host dynamic linker to search $LFS/tools/lib so LLVM Pass 1 can
be found.

Thanks Moody for report.
This commit is contained in:
Xi Ruoyao 2022-10-11 19:39:08 +08:00
parent 44cb325aa2
commit 4621dcbd90
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1 changed files with 15 additions and 1 deletions
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16
chapter06/rustc.xml
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@ -53,7 +53,13 @@ sed -i.orig compiler/rustc_target/src/spec/mod.rs \
-e '/targets!/a\ ("i586-lfs-linux-gnu", i586_lfs_linux_gnu),'</userinput></screen> -e '/targets!/a\ ("i586-lfs-linux-gnu", i586_lfs_linux_gnu),'</userinput></screen>
<para>In the first pass, build Rustc as a cross compiler for <para>In the first pass, build Rustc as a cross compiler for
<envar>$LFS_TGT</envar>. Create a suitable configuration:</para> <envar>$LFS_TGT</envar>. The cross compiler will link to LLVM Pass 1,
so we need to tell the dynamic linker of the host distro where to find
the LLVM Pass 1 dynamic library:</para>
<screen><userinput remap="pre">export LD_LIBRARY_PATH=$LFS/tools/lib</userinput></screen>
<para>Create a suitable configuration:</para>
<screen><userinput remap="pre">install -vm755 src/llvm-project/llvm/cmake/config.guess config.guess <screen><userinput remap="pre">install -vm755 src/llvm-project/llvm/cmake/config.guess config.guess
cat &gt; pass1.toml &lt;&lt; EOF<literal> cat &gt; pass1.toml &lt;&lt; EOF<literal>
@ -163,6 +169,14 @@ python3 x.py install --keep-stage 0 \
--config pass2.toml --config pass2.toml
ln -sv rustc-&rustc-version; $LFS/opt/rustc</userinput></screen> ln -sv rustc-&rustc-version; $LFS/opt/rustc</userinput></screen>
<!-- Maybe we should just set LD_LIBRARY_PATH=$LFS/tools
during the entire chapter 5 and 6. But doing so will need to
modify .bashrc of lfs user. For now just unset it, so the manual
build is consistent with jhalfs. -->
<para>Clean up the environment:</para>
<screen><userinput remap="make">unset LD_LIBRARY_PATH</userinput></screen>
</sect2> </sect2>
<sect2 role="content"> <sect2 role="content">