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authorSam Ravnborg <sam@ravnborg.org>2007-05-28 22:26:55 +0200
committerSam Ravnborg <sam@ravnborg.org>2007-07-16 21:15:48 +0200
commit7015030faf4af623804d63b5345c45fa0cad8b74 (patch)
tree60e63ba60b6e3137d4d3cf13b5c89bcca4cd2218 /Documentation/kbuild/makefiles.txt
parentf5e83fa4c07488406b4a4e0ab7c4efd8df9ad676 (diff)
kbuild: document cc-fullversion
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'Documentation/kbuild/makefiles.txt')
-rw-r--r--Documentation/kbuild/makefiles.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index bb5306e9a5c..e08ef8759a0 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 useful 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
+ to the user why it stops.
=== 4 Host Program support