From 8a269ec27eaaffdba200b3b21f7f8821a03456bd Mon Sep 17 00:00:00 2001 From: Bruce Dubbs Date: Thu, 12 Aug 2021 16:03:35 -0500 Subject: Touch up cleanup commands in Chapter 8 We moved the rm /tools from Chapter 8 to Chapter 7. Some minor wording changes and file renaming. --- chapter08/strippingagain.xml | 112 ------------------------------------------- 1 file changed, 112 deletions(-) delete mode 100644 chapter08/strippingagain.xml (limited to 'chapter08/strippingagain.xml') diff --git a/chapter08/strippingagain.xml b/chapter08/strippingagain.xml deleted file mode 100644 index a2b6f0263..000000000 --- a/chapter08/strippingagain.xml +++ /dev/null @@ -1,112 +0,0 @@ - - - %general-entities; -]> - - - - - Stripping Again - - This section is optional. If the intended user is not a - programmer and does not plan to do - any debugging on the system software, the system size can be decreased - by about 2 GB by removing the debugging symbols from binaries and - libraries. This causes no inconvenience other than not being able to - debug the software fully anymore. - - Most people who use the commands mentioned below do not - experience any difficulties. However, it is easy to make a typo and - render the new system unusable, so before running the - strip commands, it is a good idea to make a - backup of the LFS system in its current state. - - The debugging symbols for selected libraries are placed - in separate files. This debugging information is needed if running - regression tests that use valgrind or gdb later in BLFS. - - - Note that strip will overwrite the binary or library - file it is processing. This may crash the processes using code or data from - the file. If the process running strip itself is - affected, the binary or library being stripped may be destroyed. This may - make the system completely unusable. To avoid it, we'll copy some libraries - and binaries into /tmp, strip them - there, and install them back with the install command. - Read the related entry in for the - rationale to use the install command here. - - The ELF loader's name is ld-linux-x86-64.so.2 on 64-bit systems - and ld-linux.so.2 on 32-bit systems. The contruct below selects the - correct name for the current architecture. - - - - - - save_usrlib="$(cd /usr/lib; ls ld_linux*) - libc.so.6 - libthread_db.so.1 - libquadmath.so.&libquadmath-version; - libstdc++.so.&libstdcpp-version; - libitm.so.&libitm-version; - libatomic.so.&libatomic-version;" - -cd /usr/lib - -for LIB in $save_usrlib; do - objcopy --only-keep-debug $LIB $LIB.dbg - cp $LIB /tmp/$LIB - strip --strip-unneeded /tmp/$LIB - objcopy --add-gnu-debuglink=$LIB.dbg /tmp/$LIB - install -vm755 /tmp/$LIB /usr/lib - rm /tmp/$LIB -done - -online_usrbin="bash find strip" -online_usrlib="libbfd-&binutils-version;.so - libhistory.so.&readline-version; - libncursesw.so.&ncurses-version; - libm.so.6 - libreadline.so.&readline-version; - libz.so.&zlib-version; - $(cd /usr/lib; find libnss*.so* -type f)" - -for BIN in $online_usrbin; do - cp /usr/bin/$BIN /tmp/$BIN - strip --strip-unneeded /tmp/$BIN - install -vm755 /tmp/$BIN /usr/bin - rm /tmp/$BIN -done - -for LIB in $online_usrlib; do - cp /usr/lib/$LIB /tmp/$LIB - strip --strip-unneeded /tmp/$LIB - install -vm755 /tmp/$LIB /usr/lib - rm /tmp/$LIB -done - -for i in $(find /usr/lib -type f -name \*.so* ! -name \*dbg) \ - $(find /usr/lib -type f -name \*.a) \ - $(find /usr/{bin,sbin,libexec} -type f); do - case "$online_usrbin $online_usrlib $save_usrlib" in - *$(basename $i)* ) - ;; - * ) strip --strip-unneeded $i - ;; - esac -done - -unset BIN LIB save_usrlib online_usrbin online_usrlib - - - A large number of files will be reported as having their file - format not recognized. These warnings can be safely ignored. These - warnings indicate that those files are scripts instead of - binaries. - - -- cgit v1.2.3-54-g00ecf