Changeset c0dfeea

Timestamp:

08/29/2022 03:27:14 AM (20 months ago)

Author:

Xi Ruoyao <xry111@…>

Branches:

11.2, 11.3, 12.0, 12.1, kea, ken/TL2024, ken/inkscape-core-mods, ken/tuningfonts, lazarus, lxqt, plabs/newcss, plabs/python-mods, python3.11, qt5new, rahul/power-profiles-daemon, renodr/vulkan-addition, trunk, xry111/llvm18, xry111/soup3, xry111/xf86-video-removal

Children:

ed2176e5

Parents:

96923ef

Message:

rust: it's broken on non-SSE2 i686

File:

• general/prog/rust.xml (modified) (1 diff)

general/prog/rust.xml

@@ -34 +34 @@
   <sect2 role="package">
     <title>Introduction to Rust</title>
+
+    <note>
+      <para>
+        Currently Rust compiler produces SSE2 instructions for 32-bit x86,
+        causing the generated code broken on 32-bit systems without a
+        SSE2-capable processor.  All x86 processor models released after
+        2004 should be SSE2-capable.  Run
+        <command>lscpu | grep sse2</command> as a test.  If it outputs
+        anything, your CPU is SSE2-capable and OK.  Otherwise you may try
+        to build this package <emphasis>on a SSE2-capable system</emphasis>
+        with the following fix applied:
+      </para>
+
+      <!-- computeroutput used deliberately to stop anyone from copying
+           blindly -->
+<screen role="nodump"><computeroutput>sed 's@pentium4@pentiumpro@' -i \
+    compiler/rustc_target/src/spec/i686_unknown_linux_gnu.rs</computeroutput></screen>
+
+      <para>
+        And copy the resulted
+        <filename class="directory">/opt/rustc-&rust-version;</filename>
+        to the system without SSE2 capability. But this change is still
+        under upstream review and not tested by BLFS editors.
+      </para>
+    </note>
 
     <para>