From ffedf5114c8bdd5b024fb87e23b935e7d90c6ff3 Mon Sep 17 00:00:00 2001
From: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
Date: Sat, 2 Oct 2010 14:52:07 +0000
Subject: Allow to pass separate configure arguments for build, host and
 target.

/:
	PR bootstrap/45326
	PR bootstrap/45174
	* configure.ac: Honor initial values of $build_configargs,
	$host_configargs, $target_configargs.  Mark the precious, so
	environment settings get recorded.
	* configure: Regenerate.

gcc/:
	* doc/install.texi (Configuration): Document build_configargs,
	host_configargs, target_configargs.

From-SVN: r164904
---
 gcc/ChangeLog        |  5 +++++
 gcc/doc/install.texi | 30 ++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

(limited to 'gcc')

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b7c2e64..5c22678 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2010-10-02  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	* doc/install.texi (Configuration): Document build_configargs,
+	host_configargs, target_configargs.
+
 2010-10-01  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (*ashl<mode>3_mask): New insn_and_split pattern.
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index a54b450..ce6b5cf 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -1991,6 +1991,36 @@ Do not try to compile and run a test libart program.
 
 @end table
 
+@subsubheading Overriding @command{configure} test results
+
+Sometimes, it might be necessary to override the result of some
+@command{configure} test, for example in order to ease porting to a new
+system or work around a bug in a test.  The toplevel @command{configure}
+script provides three variables for this:
+
+@table @code
+
+@item build_configargs
+@cindex @code{build_configargs}
+The contents of this variable is passed to all build @command{configure}
+scripts.
+
+@item host_configargs
+@cindex @code{host_configargs}
+The contents of this variable is passed to all host @command{configure}
+scripts.
+
+@item target_configargs
+@cindex @code{target_configargs}
+The contents of this variable is passed to all target @command{configure}
+scripts.
+
+@end table
+
+In order to avoid shell and @command{make} quoting issues for complex
+overrides, you can pass a setting for @env{CONFIG_SITE} and set
+variables in the site file.
+
 @html
 <hr />
 <p>
-- 
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