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Diffstat (limited to 'chapter05/gcc-pass1.xml')
| -rw-r--r-- | chapter05/gcc-pass1.xml | 234 |
1 files changed, 85 insertions, 149 deletions
diff --git a/chapter05/gcc-pass1.xml b/chapter05/gcc-pass1.xml index 0534ee057..ad2ac0d35 100644 --- a/chapter05/gcc-pass1.xml +++ b/chapter05/gcc-pass1.xml @@ -25,7 +25,7 @@ <title/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" - href="../chapter06/gcc.xml" + href="../chapter08/gcc.xml" xpointer="xpointer(/sect1/sect2[1]/para[1])"/> <segmentedlist> @@ -33,8 +33,8 @@ <segtitle>&diskspace;</segtitle> <seglistitem> - <seg>&gcc-ch5p1-sbu;</seg> - <seg>&gcc-ch5p1-du;</seg> + <seg>&gcc-tmpp1-sbu;</seg> + <seg>&gcc-tmpp1-du;</seg> </seglistitem> </segmentedlist> @@ -43,17 +43,11 @@ <sect2 role="installation"> <title>Installation of Cross GCC</title> - <para arch="default">GCC now requires the GMP, MPFR, and MPC packages. As - these packages may not be included in your host distribution, they will be - built with GCC. Unpack each package into the GCC source directory and - rename the resulting directories so the GCC build procedures will - automatically use them:</para> - - <para arch="ml_32,ml_x32,ml_all">GCC now requires the GMP, ISL, MPFR, and MPC packages. - As these packages may not be included in your host distribution, they will - be built with GCC. Unpack each package into the GCC source directory and - rename the resulting directories so the GCC build procedures will - automatically use them:</para> + <para>GCC requires the GMP, MPFR and MPC packages. As these packages may + not be included in your host distribution, they will be built with + GCC. Unpack each package into the GCC source directory and rename the + resulting directories so the GCC build procedures will automatically + use them:</para> <note><para>There are frequent misunderstandings about this chapter. The procedures are the same as every other chapter as explained earlier (<xref @@ -61,56 +55,17 @@ directory and then change to the directory created. Only then should you proceed with the instructions below.</para></note> -<screen arch="default"><userinput remap="pre">tar -xf ../mpfr-&mpfr-version;.tar.xz +<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 arch="ml_32,ml_x32,ml_all"><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 -tar -xf ../isl-&isl-version;.tar.xz +mv -v mpc-&mpc-version; mpc</userinput> +<userinput remap="pre" arch="ml_32,ml_x32,ml_all">tar -xf ../isl-&isl-version;.tar.xz mv -v isl-&isl-version; isl</userinput></screen> - <para>The following command will change the location of GCC's default - dynamic linker to use the one installed in <filename - class="directory">/tools</filename>. It also removes <filename - class="directory">/usr/include</filename> from GCC's include search path. - Issue:</para> - -<screen><userinput remap="pre">for file in gcc/config/{linux,i386/linux{,64}}.h -do - cp -uv $file{,.orig} - sed -e 's@/lib\(64\)\?\(32\)\?\(x32\)\?/ld@/tools&@g' \ - -e 's@/usr@/tools@g' $file.orig > $file - touch $file.orig -done -sed -e "/^#define[[:blank:]]*STANDARD_STARTFILE_PREFIX_1/ s;\".*\";\"/tools/lib/\";" \ - -e "/^#define[[:blank:]]*STANDARD_STARTFILE_PREFIX_2/ s;\".*\";\"\";" \ - -i gcc/gcc.c</userinput></screen> - - <para>In case the above seems hard to follow, let's break it down a bit. - First we copy the files <filename>gcc/config/linux.h</filename>, - <filename>gcc/config/i386/linux.h</filename>, and - <filename>gcc/config/i386/linux64.h</filename> to a file of - the same name but with an added suffix of <quote>.orig</quote>. Then the - first sed expression prepends <quote>/tools</quote> to every instance of - <quote>/lib/ld</quote>, <quote>/lib64/ld</quote> or - <quote>/lib32/ld</quote>, while the second one replaces hard-coded - instances of <quote>/usr</quote>. Next, we add our define statements which - alter the default startfile prefix to the end of the file. Note that the - trailing <quote>/</quote> in <quote>/tools/lib/</quote> is required. - Finally, we use <command>touch</command> to update the timestamp on the - copied files. When used in conjunction with <command>cp -u</command>, this - prevents unexpected changes to the original files in case the commands are - inadvertently run twice.</para> - - <para arch="default">Finally, on x86_64 hosts, set the default directory - name for 64-bit libraries to <quote>lib</quote>:</para> + <para arch="default">On x86_64 hosts, set the default directory name for + 64-bit libraries to <quote>lib</quote>:</para> <screen arch="default"><userinput remap="pre">case $(uname -m) in x86_64) @@ -119,33 +74,13 @@ sed -e "/^#define[[:blank:]]*STANDARD_STARTFILE_PREFIX_1/ s;\".*\";\"/tools/lib/ ;; esac</userinput></screen> -<screen arch="ml_32,ml_x32,ml_all"><userinput remap="pre">sed -e '/m64=/s/lib64/lib/' \ - -e '/m32=/s/m32=.*/m32=..\/lib32$(call if_multiarch,:i386-linux-gnu)/' \ - -i.orig gcc/config/i386/t-linux64</userinput></screen> - -<!-- - <para>GCC doesn't detect stack protection correctly, which causes problems - for the build of Glibc-&glibc-version;, so fix that by issuing the following - command:</para> - -<screen><userinput remap="pre">sed -i '/k prot/agcc_cv_libc_provides_ssp=yes' gcc/configure</userinput></screen> ---> + <para arch="ml_32,ml_x32,ml_all">Change the default directory name for + libraries:</para> -<!-- - <para>Also fix a problem identified upstream:</para> - -<screen><userinput remap="pre">sed -i 's/if \((code.*))\)/if (\1 \&\& \!DEBUG_INSN_P (insn))/' gcc/sched-deps.c</userinput></screen> ---> - - <!-- Following patch might be obsolete with gcc >= 8.2.1 --> - <!-- see: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86724 --> - <!-- Fix applied in ch5-gcc-pass{1,2}, ch6-gcc --> -<!-- - <para arch="ml_32,ml_x32,ml_all">Fix an issue with isl-&isl-version;:</para> - -<screen arch="ml_32,ml_x32,ml_all"><userinput remap="pre">sed -e "/#include <isl\/schedule_node.h>/ a#include <isl/id.h>\n#include <isl/space.h>" \ - -i gcc/graphite.h</userinput></screen> ---> +<screen arch="ml_32,ml_x32,ml_all"><userinput remap="pre">sed -e '/m64=/s/lib64/lib/' \ + -e '/m32=/s/m32=.*/m32=..\&lib-m32;$(call if_multiarch,:i386-linux-gnu)/' \ + -i.orig gcc/config/i386/t-linux64 +</userinput></screen> <para>The GCC documentation recommends building GCC in a dedicated build directory:</para> @@ -155,21 +90,41 @@ cd build</userinput></screen> <para>Prepare GCC for compilation:</para> -<screen><userinput arch="default" remap="configure">mloptions="--disable-multilib"</userinput> -<userinput arch="ml_32,ml_x32,ml_all" remap="configure">mloptions="--enable-multilib --with-multilib-list=m64"</userinput> -<userinput arch="ml_32,ml_all" remap="configure">mloptions="$mloptions,m32"</userinput> -<userinput arch="ml_x32,ml_all" remap="configure">mloptions="$mloptions,mx32"</userinput> +<screen arch="default"><userinput remap="configure">../configure \ + --target=$LFS_TGT \ + --prefix=$LFS/tools \ + --with-glibc-version=2.11 \ + --with-sysroot=$LFS \ + --with-newlib \ + --without-headers \ + --enable-initfini-array \ + --disable-nls \ + --disable-shared \ + --disable-multilib \ + --disable-decimal-float \ + --disable-threads \ + --disable-libatomic \ + --disable-libgomp \ + --disable-libquadmath \ + --disable-libssp \ + --disable-libvtv \ + --disable-libstdcxx \ + --enable-languages=c,c++</userinput></screen> +<screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure" + arch="ml_32">mlist=m64,m32</userinput><userinput remap="configure" + arch="ml_x32">mlist=m64,mx32</userinput><userinput remap="configure" + arch="ml_all">mlist=m64,m32,mx32</userinput> <userinput remap="configure">../configure \ --target=$LFS_TGT \ - --prefix=/tools \ + --prefix=$LFS/tools \ --with-glibc-version=2.11 \ --with-sysroot=$LFS \ --with-newlib \ --without-headers \ - --with-local-prefix=/tools \ - --with-native-system-header-dir=/tools/include \ + --enable-initfini-array \ --disable-nls \ --disable-shared \ + --enable-multilib --with-multilib-list=$mlist \ --disable-decimal-float \ --disable-threads \ --disable-libatomic \ @@ -178,8 +133,7 @@ cd build</userinput></screen> --disable-libssp \ --disable-libvtv \ --disable-libstdcxx \ - --enable-languages=c,c++ \ - $mloptions</userinput></screen> + --enable-languages=c,c++</userinput></screen> <variablelist> <title>The meaning of the configure options:</title> @@ -213,69 +167,52 @@ cd build</userinput></screen> </varlistentry> <varlistentry> - <term><parameter>--with-local-prefix=/tools</parameter></term> + <term><parameter>--enable-initfini-array</parameter></term> <listitem> - <para>The local prefix is the location in the system that GCC will search - for locally installed include files. The default is <filename>/usr/local</filename>. - Setting this to <filename>/tools</filename> helps keep the host location of - <filename>/usr/local</filename> out of this GCC's search path.</para> + <para>This switch forces the use of some internal data structures + that are needed but cannot be detected when building a cross + compiler.</para> </listitem> </varlistentry> <varlistentry> - <term><parameter>--with-native-system-header-dir=/tools/include</parameter></term> + <term><parameter>--disable-shared</parameter></term> <listitem> - <para>By default, GCC searches <filename>/usr/include</filename> for - system headers. In conjunction with the sysroot switch, this would - normally translate to <filename>$LFS/usr/include</filename>. However - the headers that will be installed in the next two sections will go - to <filename>$LFS/tools/include</filename>. This switch ensures that - gcc will find them correctly. In the second pass of GCC, this same - switch will ensure that no headers from the host system are - found.</para> + <para>This switch forces GCC to link its internal libraries + statically. We need this because the shared libraries require glibc, + which is not yet installed on the target system.</para> </listitem> </varlistentry> - <varlistentry> - <term><parameter>--disable-shared</parameter></term> + <varlistentry arch="default"> + <term><parameter>--disable-multilib</parameter></term> <listitem> - <para>This switch forces GCC to link its internal libraries - statically. We do this to avoid possible issues with the host - system.</para> + <para>On x86_64, LFS does not support a multilib configuration. + This switch is harmless for x86.</para> + </listitem> + </varlistentry> + <varlistentry arch="ml_32,ml_x32,ml_all"> + <term><parameter>--enable-multilib --with-multilib-list=...</parameter></term> + <listitem> + <para>LFS canbe used to support multilib. Which they are is + specified in the multilib list.</para> </listitem> </varlistentry> <varlistentry> <term><parameter>--disable-decimal-float, --disable-threads, - --disable-libatomic, --disable-libgomp, <!--- -disable-libmpx,--> + --disable-libatomic, --disable-libgomp, --disable-libquadmath, --disable-libssp, --disable-libvtv, --disable-libstdcxx</parameter></term> <listitem> <para>These switches disable support for the decimal floating point - extension, threading, libatomic, libgomp, <!--libmpx, --> libquadmath, libssp, + extension, threading, libatomic, libgomp, libquadmath, libssp, libvtv, and the C++ standard library respectively. These features will fail to compile when building a cross-compiler and are not necessary for the task of cross-compiling the temporary libc.</para> </listitem> </varlistentry> - <varlistentry arch="default"> - <term><parameter>--disable-multilib</parameter></term> - <listitem> - <para>On x86_64, LFS does not yet support a multilib configuration. - This switch is harmless for x86.</para> - </listitem> - </varlistentry> - - <varlistentry arch="ml_32,ml_x32,ml_all"> - <term><parameter>--enable-multilib, - --with-multilib-list=m32,m64,mx32</parameter></term> - <listitem> - <para>LFS now supports a multilib configuration. Enable it for the - 32bit, the 64-bit, and the mixed mode.</para> - </listitem> - </varlistentry> - <varlistentry> <term><parameter>--enable-languages=c,c++</parameter></term> <listitem> @@ -290,26 +227,25 @@ cd build</userinput></screen> <screen><userinput remap="make">make</userinput></screen> - <para>Compilation is now complete. At this point, the test suite would - normally be run, but, as mentioned before, the test suite framework is - not in place yet. The benefits of running the tests at this point - are minimal since the programs from this first pass will soon be - replaced.</para> - <para>Install the package:</para> -<screen><userinput remap="install">make install</userinput></screen> -<!-- - <para>Using <parameter>- -disable-shared</parameter> means that the - <filename>libgcc_eh.a</filename> file isn't created and installed. The - Glibc package depends on this library as it uses - <parameter>-lgcc_eh</parameter> within its build system. This dependency - can be satisfied by creating a symlink to <filename>libgcc.a</filename>, - since that file will end up containing the objects normally contained in - <filename>libgcc_eh.a</filename>:</para> - -<screen><userinput remap="install">ln -sv libgcc.a `$LFS_TGT-gcc -print-libgcc-file-name | sed 's/libgcc/&_eh/'`</userinput></screen> ---> + <screen><userinput remap="install">make install</userinput></screen> + + <para>This build of GCC has installed a couple of internal system + headers. Normally one of them, <filename>limits.h</filename>, would in turn + include the corresponding system <filename>limits.h</filename> header, in + this case, <filename>$LFS/usr/include/limits.h</filename>. However, at the + time of this build of GCC <filename>$LFS/usr/include/limits.h</filename> + does not exist, so the internal header that has just been installed is a + partial, self-contained file and does not include the extended features of + the system header. This is adequate for building glibc, but the full + internal header will be needed later. 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="install">cd .. +cat gcc/limitx.h gcc/glimits.h gcc/limity.h > \ + `dirname $($LFS_TGT-gcc -print-libgcc-file-name)`/install-tools/include/limits.h</userinput></screen> </sect2> <sect2 role="content"> |