Changeset 4621dcb

Timestamp:

10/11/2022 11:39:08 AM (19 months ago)

Author:

Xi Ruoyao <xry111@…>

Branches:

xry111/rust-wip-20221008

Children:

d7c5e6c

Parents:

44cb325a

Message:

rust: temporary rustc: export LD_LIBRARY_PATH for LLVM Pass 1

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.

File:

• chapter06/rustc.xml (modified) (2 diffs)

chapter06/rustc.xml

@@ -54 +54 @@
 
     <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
@@ -164 +170 @@
 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>