Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (33 commits)
  xtensa: use DATA_DATA in xtensa
  powerpc: add missing DATA_DATA to powerpc
  cris: use DATA_DATA in cris
  kallsyms: remove usage of memmem and _GNU_SOURCE from scripts/kallsyms.c
  kbuild: use -fno-optimize-sibling-calls unconditionally
  kconfig: reset generated values only if Kconfig and .config agree.
  kbuild: fix the warning when running make tags
  kconfig: strip 'CONFIG_' automatically in kernel configuration search
  kbuild: use POSIX BRE in headers install target
  Whitelist references from __dbe_table to .init
  modpost white list pattern adjustment
  kbuild: do section mismatch check on full vmlinux
  kbuild: whitelist references from variables named _timer to .init.text
  kbuild: remove hardcoded _logo names from modpost
  kbuild: remove hardcoded apic_es7000 from modpost
  kbuild: warn about references from .init.text to .exit.text
  kbuild: consolidate section checks
  kbuild: refactor code in modpost to improve maintainability
  kbuild: ignore section mismatch warnings originating from .note section
  kbuild: .paravirtprobe section is obsolete, so modpost doesn't need to handle it
  ...

1 files changed, 14 insertions, 0 deletions

diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index bb5306e9a5c3..e08ef8759a07 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