diff options
| -rw-r--r-- | chapter01/changelog.xml | 3 | ||||
| -rw-r--r-- | chapter05/binutils-pass1.xml | 17 |
2 files changed, 16 insertions, 4 deletions
diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml index 5c341af96..702c546ea 100644 --- a/chapter01/changelog.xml +++ b/chapter01/changelog.xml @@ -40,6 +40,9 @@ <para>2007-08-31</para> <itemizedlist> <listitem> + <para>[jhuntwork] - Update explanatory text for the use of -m64.</para> + </listitem> + <listitem> <para>[jhuntwork] - Update explanatory text for GCC's --with-arch parameter.</para> </listitem> <listitem> diff --git a/chapter05/binutils-pass1.xml b/chapter05/binutils-pass1.xml index c21f343f5..086566e73 100644 --- a/chapter05/binutils-pass1.xml +++ b/chapter05/binutils-pass1.xml @@ -57,9 +57,8 @@ cd ../binutils-build</userinput></screen> && make install; }</userinput>.</para> </note> - <para>Test to see if the host is a multilib capable machine and set a variable - if it is. This ensures that only 64-bit binaries are built if using such a host. - </para> + <para>Test to see if the host is a 64-bit capable machine and set a variable + if it is.</para> <screen><userinput>test $(uname -m | grep 64) && M64="-m64"</userinput></screen> @@ -73,13 +72,23 @@ unset M64</userinput></screen> <title>The meaning of the configure options:</title> <varlistentry> - <term><envar>CC="gcc -B/usr/bin/"</envar></term> + <term><envar>CC="gcc -B/usr/bin/ $M64"</envar></term> <listitem> <para>This forces <command>gcc</command> to prefer the linker from the host in <filename class="directory">/usr/bin</filename>. This is necessary on some hosts where the new <command>ld</command> built here is not compatible with the host's <command>gcc</command>. </para> + <para>Also, if the cpu-type is 64-bit capable, the variable <envar>$M64</envar> + will contain the parameter <parameter>-m64</parameter>. Otherwise, the + variable is empty. The parameter forces <command>gcc</command> to build + 64-bit binaries. Using that parameter here and for the next package + ensures creation of a linker, assembler and compiler that will in turn + create only 64-bit binaries. This is necessary since currently this book + does not support the creation of multilib systems, i.e., those with both + 32-bit and 64-bit libraries. This will only make a difference on hosts that + are themselves multilib and employ a compiler that creates 32-bit binaries + by default.</para> </listitem> </varlistentry> |