Author: matthew
Date: 2010-01-26 11:17:27 -0700 (Tue, 26 Jan 2010)
New Revision: 9163
Modified:
trunk/BOOK/chapter05/glibc.xml
trunk/BOOK/general.ent
Log:
Clarify the use of autoconf variables to ensure forced-unwind and C-cleanup
support in chapter 5's Glibc. Fixes #2543.
Modified: trunk/BOOK/chapter05/glibc.xml
===================================================================
--- trunk/BOOK/chapter05/glibc.xml 2010-01-25 01:26:07 UTC (rev 9162)
+++ trunk/BOOK/chapter05/glibc.xml 2010-01-26 18:17:27 UTC (rev 9163)
@@ -120,17 +120,21 @@
<varlistentry>
<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>
<varlistentry>
<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>
Modified: trunk/BOOK/general.ent
===================================================================
--- trunk/BOOK/general.ent 2010-01-25 01:26:07 UTC (rev 9162)
+++ trunk/BOOK/general.ent 2010-01-26 18:17:27 UTC (rev 9163)
@@ -1,5 +1,5 @@
-<!ENTITY version "SVN-20100124">
-<!ENTITY releasedate "January 24, 2010">
+<!ENTITY version "SVN-20100126">
+<!ENTITY releasedate "January 26, 2010">
<!ENTITY copyrightdate "1999-2010"><!-- jhalfs needs a literal dash, not
– -->
<!ENTITY milestone "7.0">
<!ENTITY generic-version "development"> <!-- Use "development", "testing", or
"x.y[-pre{x}]" -->
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