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Message-ID: <20070603204603.GE9240@uranus.ravnborg.org>
Date:	Sun, 3 Jun 2007 22:46:03 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	kbuild-devel@...ts.sourceforge.net
Subject: [PATCH 05/19] kbuild: document cc-fullversion

Subject: [PATCH 05/19] kbuild: document cc-fullversion
From: Sam Ravnborg <sam@...nborg.org>
Date: Mon, 28 May 2007 22:26:55 +0200

Signed-off-by: Sam Ravnborg <sam@...nborg.org>
---
 Documentation/kbuild/makefiles.txt |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index bb5306e..c6d9a35 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -501,6 +501,20 @@ more details, with real examples.
 	The third parameter may be a text as in this example, but it may also
 	be an expanded variable or a macro.
 
+    cc-fullversion
+	cc-fullversion is usefull when the exact version of gcc is needed.
+	One typical use-case is when a specific GCC version is broken.
+	cc-fullversion points out a more specific version than cc-version does.
+
+	Example:
+		#arch/powerpc/Makefile
+		$(Q)if test "$(call cc-fullversion)" = "040200" ; then \
+			echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
+			false ; \
+		fi
+
+	In this example for a specific GCC version the build will error out explaining
+	the user why it stops.
 
 === 4 Host Program support
 
-- 
1.5.1.rc3.1544.g8a923


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