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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@2274 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
39 lines
1.9 KiB
XML
39 lines
1.9 KiB
XML
<sect2>
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<title>Command explanations</title>
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<para><userinput>--prefix=/static:</userinput> This is NOT a typo. GCC hard
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codes some paths while compiling and so we need to pass /static as the
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prefix during ./configure. We pass the real install prefix during the
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make install command later.</para>
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<para><userinput>--with-as and --with-ld:</userinput> GCC can be
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miscompiled if your host distribution's Binutils package is quite old. We
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need a good working static GCC until we reinstall GCC later in chapter 6.
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So by using <filename>as</filename> and <filename>ld</filename> from the
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Binutils package we just compiled we ensure that GCC will work
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correctly.</para>
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<para><userinput>make BOOT_LDFLAGS="-static":</userinput>
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This is the equivalent to make LDFLAGS="-static" as we use with other
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packages to compile them statically.</para>
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<para><userinput>make install-no-fixedincludes:</userinput>
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This prevents the fixincludes script from running. Preventing this is
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necessary because under normal circumstances the GCC installation will run
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the fixincludes script which scans your system for header files that need to
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be fixed. It might find that the Glibc header files of your host system need
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to be fixed. If so, it will fix them and put them in
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<filename>$LFS/static/lib/gcc-lib/i686-pc-linux-gnu/3.2</filename>.
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Later on in chapter 6 you will install Glibc which will put its header
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files in <filename>/usr/include</filename>. Next you will install other
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programs that use the Glibc headers. GCC will look in
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<filename>/static/lib/gcc-lib</filename> before looking in
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<filename>/usr/include</filename>, with the result of finding and using
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the fixed Glibc header files from your host distribution, which are probably
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incompatible with the Glibc version actually used on the LFS system.</para>
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<para><userinput>ln -s gcc $LFS/static/bin/cc:</userinput> This
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creates the $LFS/static/bin/gcc symlink, which some packages need.</para>
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</sect2>
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