diff options
Diffstat (limited to 'chapter05/glibc.xml')
| -rw-r--r-- | chapter05/glibc.xml | 159 |
1 files changed, 156 insertions, 3 deletions
diff --git a/chapter05/glibc.xml b/chapter05/glibc.xml index 14f1fac6c..0339a7b22 100644 --- a/chapter05/glibc.xml +++ b/chapter05/glibc.xml @@ -47,13 +47,16 @@ for x86_64, create a compatibility symbolic link required for proper operation of the dynamic library loader:</para> -<screen><userinput remap="pre">case $(uname -m) in +<screen arch="default"><userinput remap="pre">case $(uname -m) in i?86) ln -sfv ld-linux.so.2 $LFS/lib/ld-lsb.so.3 ;; x86_64) ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64 ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64/ld-lsb-x86-64.so.3 ;; esac</userinput></screen> +<!-- no ld-linux.so.2 here as multilib is based on x86_64, not on i686 --> +<screen arch="ml_32,ml_x32,ml_all"><userinput remap="pre">ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64 +ln -sfv ../lib/ld-linux-x86-64.so.2 $LFS/lib64/ld-lsb-x86-64.so.3</userinput></screen> <note> <para> @@ -85,13 +88,21 @@ cd build</userinput></screen> <para>Next, prepare Glibc for compilation:</para> -<screen><userinput remap="configure">../configure \ +<screen arch="default"><userinput remap="configure">../configure \ --prefix=/usr \ --host=$LFS_TGT \ --build=$(../scripts/config.guess) \ --enable-kernel=&min-kernel; \ --with-headers=$LFS/usr/include \ libc_cv_slibdir=/usr/lib</userinput></screen> +<screen arch="ml_32,ml_x32,ml_all"><userinput remap="configure">../configure \ + --prefix=/usr \ + --host=$LFS_TGT \ + --build=$(../scripts/config.guess) \ + --enable-kernel=&min-kernel; \ + --with-headers=$LFS/usr/include \ + --enable-multi-arch \ + libc_cv_slibdir=/usr/lib</userinput></screen> <variablelist> <title>The meaning of the configure options:</title> @@ -203,7 +214,7 @@ readelf -l a.out | grep ld-linux</userinput></screen> <screen><computeroutput>[Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]</computeroutput></screen> - <para>Note that for 32-bit machines, the interpreter name will be + <para arch="default">Note that for 32-bit machines, the interpreter name will be <filename>/lib/ld-linux.so.2</filename>.</para> <para>If the output is not as shown above, or there is no output at all, @@ -231,6 +242,148 @@ readelf -l a.out | grep ld-linux</userinput></screen> --> </sect2> + <!-- - - - - - - - - - --> + <!-- Multilib - 32bit --> + <!-- - - - - - - - - - --> + <sect2 arch="ml_32,ml_all"> + <title>Building Glibc - 32bit</title> + + <para>Now recompile for m32. The extracted source can be + reused but needs to be cleaned before installing the m32 + version of Glibc.</para> + + <para>Clear the build directory and remove artefacts from + previous build:</para> + +<screen><userinput remap="pre">make clean +find .. -name "*.a" -delete</userinput></screen> + + <para>Configure Glibc for m32 with the following commands:</para> + +<screen><userinput remap="configure">CC="$LFS_TGT-gcc -m32" \ +CXX="$LFS_TGT-g++ -m32" \ +../configure \ + --prefix=/usr \ + --host=$LFS_TGT32 \ + --build=$(../scripts/config.guess) \ + --enable-kernel=&min-kernel; \ + --with-headers=$LFS/usr/include \ + --enable-multi-arch \ + --libdir=/usr/lib32 \ + --libexecdir=/usr/lib32 \ + libc_cv_slibdir=/usr/lib32</userinput></screen> + + <para>Compile the package:</para> + +<screen><userinput remap="make">make</userinput></screen> + + <para>Install the package:</para> + +<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install +cp -a DESTDIR/usr/lib32 $LFS/usr/ +install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-32.h \ + $LFS/usr/include/gnu/ +ln -svf ../lib32/ld-linux.so.2 $LFS/lib/ld-linux.so.2</userinput></screen> + + + <caution> + <para>At this point, it is imperative to stop and ensure that the basic + functions (compiling and linking) of the new toolchain are working as + expected. To perform a sanity check, run the following commands:</para> + +<screen><userinput>echo 'int main(){}' > dummy.c +$LFS_TGT-gcc -m32 dummy.c +readelf -l a.out | grep '/ld-linux'</userinput></screen> + + <para>If everything is working correctly, there should be no errors, + and the output of the last command will be of the form:</para> + +<screen><computeroutput>[Requesting program interpreter: /lib/ld-linux.so.2]</computeroutput></screen> + + <para>If the output is not shown as above or there was no output at all, + then something is wrong. Investigate and retrace the steps to find out + where the problem is and correct it. This issue must be resolved before + continuing on.</para> + + <para>Once all is well, clean up the test files:</para> + +<screen><userinput>rm -v dummy.c a.out</userinput></screen> + + </caution> + + </sect2><!-- m32 --> + + <!-- - - - - - - - - - --> + <!-- Multilib - x32bit --> + <!-- - - - - - - - - - --> + + <sect2 arch="ml_x32,ml_all"> + <title>Building Glibc - x32bit</title> + + <para>Now recompile for mx32. The extracted source can be + reused but needs to be cleaned before installing the mx32 + version of Glibc.</para> + + <para>Clear the build directory and remove artefacts from + previous build:</para> + +<screen><userinput remap="pre">make clean +find .. -name "*.a" -delete</userinput></screen> + + <para>Configure Glibc for mx32 with the following commands:</para> + +<screen><userinput remap="configure">CC="$LFS_TGT-gcc -mx32" \ +CXX="$LFS_TGT-g++ -mx32" \ +../configure \ + --prefix=/usr \ + --host=$LFS_TGTX32 \ + --build=$(../scripts/config.guess) \ + --enable-kernel=&min-kernel; \ + --with-headers=$LFS/usr/include \ + --enable-multi-arch \ + --libdir=/usr/libx32 \ + --libexecdir=/usr/libx32 \ + libc_cv_slibdir=/usr/libx32</userinput></screen> + + <para>Compile the package:</para> + +<screen><userinput remap="make">make</userinput></screen> + + <para>Install the package:</para> + +<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install +cp -a DESTDIR/usr/libx32 $LFS/usr/ +install -vm644 DESTDIR/usr/include/gnu/{lib-names,stubs}-x32.h \ + $LFS/usr/include/gnu/ +ln -svf ../libx32/ld-linux-x32.so.2 $LFS/lib/ld-linux-x32.so.2</userinput></screen> + + <caution> + <para>At this point, it is imperative to stop and ensure that the basic + functions (compiling and linking) of the new toolchain are working as + expected. To perform a sanity check, run the following commands:</para> + +<screen><userinput>echo 'int main(){}' > dummy.c +$LFS_TGT-gcc -mx32 dummy.c +readelf -l a.out | grep '/ld-linux-x32'</userinput></screen> + + <para>If everything is working correctly, there should be no errors, + and the output of the last command will be of the form:</para> + +<screen><computeroutput>[Requesting program interpreter: /libx32/ld-linux-x32.so.2]</computeroutput></screen> + + <para>If the output is not shown as above or there was no output at all, + then something is wrong. Investigate and retrace the steps to find out + where the problem is and correct it. This issue must be resolved before + continuing on.</para> + + <para>Once all is well, clean up the test files:</para> + +<screen><userinput>rm -v dummy.c a.out</userinput></screen> + + </caution> + + </sect2><!-- mx32 --> + <sect2 role="content"> <title/> |