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Reorder gcc-pass2 to parallel gcc-pass1

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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11788 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
This commit is contained in:
Pierre Labastie 2020-03-18 08:24:08 +00:00
parent ed64d91109
commit 50645c821c
1 changed files with 30 additions and 30 deletions
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60
chapter05/gcc-pass2.xml
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@ -43,29 +43,17 @@
<sect2 role="installation">
<title>Installation of GCC</title>
<para>Our first build of GCC has installed a couple of internal system
headers. Normally one of them, <filename>limits.h</filename>, will in turn
include the corresponding system <filename>limits.h</filename> header, in
this case, <filename>/tools/include/limits.h</filename>. However, at the
time of the first build of gcc <filename>/tools/include/limits.h</filename>
did not exist, so the internal header that GCC installed is a partial,
self-contained file and does not include the extended features of the
system header. This was adequate for building the temporary libc, but this
build of GCC now requires the full internal header. Create a full version
of the internal header using a command that is identical to what the GCC
build system does in normal circumstances:</para>
<para>As in the first build of GCC, the GMP, MPFR, and MPC packages are
required. Unpack the tarballs and move them into the required directory
names:</para>
<screen><userinput remap="pre">cat gcc/limitx.h gcc/glimits.h gcc/limity.h &gt; \
`dirname $($LFS_TGT-gcc -print-libgcc-file-name)`/include-fixed/limits.h</userinput></screen>
<!--
<para>For x86 machines, the limited number of registers is a bottleneck
for the system. Free one up by not using a frame pointer that is not
needed:</para>
<screen><userinput remap="pre">tar -xf ../mpfr-&mpfr-version;.tar.xz
mv -v mpfr-&mpfr-version; mpfr
tar -xf ../gmp-&gmp-version;.tar.xz
mv -v gmp-&gmp-version; gmp
tar -xf ../mpc-&mpc-version;.tar.gz
mv -v mpc-&mpc-version; mpc</userinput></screen>
<screen><userinput remap="pre">case `uname -m` in
i?86) sed -i 's/^T_CFLAGS =$/&amp; -fomit-frame-pointer/' gcc/Makefile.in ;;
esac</userinput></screen>
-->
<para>Once again, change the location of GCC's default dynamic linker to
use the one installed in <filename
class="directory">/tools</filename>.</para>
@ -93,17 +81,29 @@ done</userinput></screen>
;;
esac</userinput></screen>
<para>As in the first build of GCC it requires the GMP, MPFR and MPC
packages. Unpack the tarballs and move them into the required directory
names:</para>
<para>Our first build of GCC has installed a couple of internal system
headers. Normally one of them, <filename>limits.h</filename>, will in turn
include the corresponding system <filename>limits.h</filename> header, in
this case, <filename>/tools/include/limits.h</filename>. However, at the
time of the first build of gcc <filename>/tools/include/limits.h</filename>
did not exist, so the internal header that GCC installed is a partial,
self-contained file and does not include the extended features of the
system header. This was adequate for building the temporary libc, but this
build of GCC now requires the full internal header. Create a full version
of the internal header using a command that is identical to what the GCC
build system does in normal circumstances:</para>
<screen><userinput remap="pre">tar -xf ../mpfr-&mpfr-version;.tar.xz
mv -v mpfr-&mpfr-version; mpfr
tar -xf ../gmp-&gmp-version;.tar.xz
mv -v gmp-&gmp-version; gmp
tar -xf ../mpc-&mpc-version;.tar.gz
mv -v mpc-&mpc-version; mpc</userinput></screen>
<screen><userinput remap="pre">cat gcc/limitx.h gcc/glimits.h gcc/limity.h &gt; \
`dirname $($LFS_TGT-gcc -print-libgcc-file-name)`/include-fixed/limits.h</userinput></screen>
<!--
<para>For x86 machines, the limited number of registers is a bottleneck
for the system. Free one up by not using a frame pointer that is not
needed:</para>
<screen><userinput remap="pre">case `uname -m` in
i?86) sed -i 's/^T_CFLAGS =$/&amp; -fomit-frame-pointer/' gcc/Makefile.in ;;
esac</userinput></screen>
-->
<para>Create a separate build directory again:</para>
<screen><userinput remap="pre">mkdir -v build