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toolchaintechnotes: Update the paragraph describing ch05 glibc

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We no longer pass CC="$LFS_TGT-gcc -nostdinc -isysroot" since
cross-chap5.
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Xi Ruoyao 2024-08-05 12:02:35 +08:00
parent 7119cf2a83
commit 678acc1775
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1 changed files with 7 additions and 10 deletions
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part3intro/toolchaintechnotes.xml
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@ -359,20 +359,17 @@ checking what linker to use... /mnt/lfs/tools/i686-lfs-linux-gnu/bin/ld</compute
<para>Next comes glibc. The most important <para>Next comes glibc. The most important
considerations for building glibc are the compiler, binary tools, and considerations for building glibc are the compiler, binary tools, and
kernel headers. The compiler is generally not an issue since glibc will kernel headers. The compiler and binary tools are generally not an issue
always use the compiler relating to the <parameter>--host</parameter> since glibc will always those relating to the <parameter>--host</parameter>
parameter passed to its configure script; e.g., in our case, the compiler parameter passed to its configure script; e.g., in our case, the compiler
will be <command>$LFS_TGT-gcc</command>. The binary tools and kernel will be <command>$LFS_TGT-gcc</command> and the <command>readelf</command>
headers can be a bit more complicated. Therefore, we take no risks and use tool will be <command>$LFS_TGT-readelf</command>. The kernel headers can
the available configure switches to enforce the correct selections. After be a bit more complicated. Therefore, we take no risks and use
the available configure switch to enforce the correct selection. After
the run of <command>configure</command>, check the contents of the the run of <command>configure</command>, check the contents of the
<filename>config.make</filename> file in the <filename <filename>config.make</filename> file in the <filename
class="directory">build</filename> directory for all important details. class="directory">build</filename> directory for all important details.
Note the use of <parameter>CC="$LFS_TGT-gcc"</parameter> (with These items highlight an important aspect of the glibc
<envar>$LFS_TGT</envar> expanded) to control which binary tools are used
and the use of the <parameter>-nostdinc</parameter> and
<parameter>-isystem</parameter> flags to control the compiler's include
search path. These items highlight an important aspect of the glibc
package&mdash;it is very self-sufficient in terms of its build machinery, package&mdash;it is very self-sufficient in terms of its build machinery,
and generally does not rely on toolchain defaults.</para> and generally does not rely on toolchain defaults.</para>