mirror of https://github.com/tLDP/LDP
54 lines
2.7 KiB
XML
54 lines
2.7 KiB
XML
<sect2>
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<title>Command explanations</title>
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<para><userinput>patch -Np1 -i ../glibc-&glibc-patch-version;.patch:</userinput>
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This patch converts all occurrences of <filename>$(PERL)</filename> to
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<filename>/usr/bin/perl</filename> in the
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<filename>malloc/Makefile</filename> file. This is done because Glibc can't
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autodetect the location of perl because perl has yet to be installed. The
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patch also replaces all occurrences of <emphasis>root</emphasis> with
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<emphasis>0</emphasis> in the <filename>login/Makefile</filename> file.
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This is done because Glibc itself isn't installed yet and therefore
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username to userid resolving isn't working yet, so a <userinput>chown root
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file</userinput> will fail, however it'll work fine if you use straight
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IDs.</para>
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<para>The patch also contains a few bug fixes and security fixes. In
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particular it contains the "errlist", "dns resolver", "xdr_array", "calloc",
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"thread exit", "udivdi3", "math test", "restrict_arr" and "divbyzero" fixes
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which are documented at
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<ulink url="http://www.zipworld.com.au/~gschafer/lfs-tweaks.html"/>.</para>
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<para><userinput>touch /etc/ld.so.conf:</userinput> One of the final steps
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of the Glibc installation is running ldconfig to update the dynamic loader
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cache. If this file doesn't exist, the installation will abort with an error
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that it can't read the file, so we simply create an empty file (the empty
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file will have Glibc default to using /lib and /usr/lib which is fine).</para>
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<para><userinput>--disable-profile:</userinput> This disables the building
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of libraries with profiling information. This command may be omitted if
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you plan to do profiling.</para>
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<para><userinput>--enable-add-ons:</userinput> This enables the add-on that
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we install with Glibc, linuxthreads</para>
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<para><userinput>--libexecdir=/usr/bin:</userinput> This will cause the
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pt_chown program to be installed in the /usr/bin directory.</para>
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<para><userinput>echo "cross-compiling = no" > configparms:</userinput>
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We do this because we are only building for our own system. Cross-compiling
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is used, for instance, to build a package for an Apple Power PC on an
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Intel system. The reason Glibc thinks we're cross-compiling is that it
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can't compile a test program to determine this, so it automatically defaults
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to a cross-compiler. Compiling the test program fails because Glibc hasn't
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been installed yet.</para>
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<para><userinput>exec /static/bin/bash --login:</userinput> This command will
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start a new bash shell which will replace the current shell. This is
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done to get rid of the "I have no name!" message in the command
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prompt, which was caused by bash's inability to resolve a user ID to
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a user name (which in turn was caused by the absence of Glibc).</para>
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</sect2>
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