From 80da60f0c070dee52f7add18aea74c0e124ed8f7 Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@xry111.site>
Date: Wed, 13 Sep 2023 15:39:25 +0800
Subject: stripping: Compress the kept debug info with Zlib

---
 chapter08/stripping.xml | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/chapter08/stripping.xml b/chapter08/stripping.xml
index 68e0f8da1..b7b983d73 100644
--- a/chapter08/stripping.xml
+++ b/chapter08/stripping.xml
@@ -29,9 +29,12 @@
   needed by the linker (for static libraries) or dynamic linker (for
   dynamically linked binaries and shared libraries).</para>
 
-  <para>The debugging symbols from selected libraries are preserved
-  in separate files.  That debugging information is needed to run
-  regression tests with <ulink
+  <!-- TODO: Zstd is better than Zlib for both speed and size.
+             Unfortunately Valgrind does not support Zstd-compressed debug
+             info yet: https://bugs.kde.org/show_bug.cgi?id=469782 -->
+  <para>The debugging symbols from selected libraries are compressed with
+  <application>Zlib</application> and preserved in separate files.  That
+  debugging information is needed to run regression tests with <ulink
   url='&blfs-book;/general/valgrind.html'>valgrind</ulink> or <ulink
   url='&blfs-book;/general/gdb.html'>gdb</ulink> later, in BLFS.
   </para>
@@ -78,7 +81,7 @@
 cd /usr/lib
 
 for LIB in $save_usrlib; do
-    objcopy --only-keep-debug $LIB $LIB.dbg
+    objcopy --only-keep-debug --compress-debug-sections=zlib $LIB $LIB.dbg
     cp $LIB /tmp/$LIB
     strip --strip-unneeded /tmp/$LIB
     objcopy --add-gnu-debuglink=$LIB.dbg /tmp/$LIB
-- 
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