Changeset ff9fa3c0 for chapter05/glibc.xml

Timestamp:

01/26/2010 06:17:27 PM (14 years ago)

Author:

Matthew Burgess <matthew@…>

Branches:

10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 6.6, 6.7, 6.8, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.5-systemd, 7.6, 7.6-systemd, 7.7, 7.7-systemd, 7.8, 7.8-systemd, 7.9, 7.9-systemd, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

cf8d194

Parents:

d8d272b

Message:

Clarify the use of autoconf variables to ensure forced-unwind and C-cleanup support in chapter 5's Glibc. Fixes #2543.

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9163 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:

• chapter05/glibc.xml (modified) (2 diffs)

chapter05/glibc.xml

@@ -121 +121 @@
         <term><parameter>libc_cv_forced_unwind=yes</parameter></term>
         <listitem>
-          <para>The build requires support for forced unwind, but because it is
-          being cross compiled, it cannot auto detect it. Setting this variable
-          on the command line explicitly tells the
-          <command>configure</command> script that support is available.</para>
+          <para>The linker installed during
+          <xref linkend="ch-tools-binutils-pass1"/> was cross-compiled and as
+          such cannot be used until Glibc has been installed.  This means that
+          the configure test for force-unwind support will fail, as it relies on
+          a working linker.  The libc_cv_forced_unwind=yes variable is passed in
+          order to inform <command>configure</command> that force-unwind
+          support is available without it having to run the test.</para>
         </listitem>
       </varlistentry>
@@ -130 +133 @@
         <term><parameter>libc_cv_c_cleanup=yes</parameter></term>
         <listitem>
-          <para>The build also requires support for C cleanup handling, which it
-          cannot auto detect when being cross compiled. Enable it explicitly.</para>
+          <para>Simlarly, we pass libc_cv_c_cleanup=yes through to the
+          <command>configure</command> script so that the test is skipped and C
+          cleanup handling support is configured.</para>
         </listitem>
       </varlistentry>