[PATCH] docs: bump minimal GNU Make version to 3.81

From: Masahiro Yamada
Date: Sat May 06 2017 - 11:41:42 EST

Recent kernel versions have broken compatibility with GNU Make
version 3.80 here and there:

$ git describe
$ make --version | head -1
GNU Make 3.80
$ make defconfig
HOSTCC scripts/basic/fixdep
scripts/Makefile.host:135: *** missing separator. Stop.
make: *** [defconfig] Error 2
$ make ARCH=arm64 help
arch/arm64/Makefile:43: *** unterminated call to function `warning': missing `)'. Stop.
$ make help >/dev/null
./Documentation/Makefile.sphinx:25: Extraneous text after `else' directive
./Documentation/Makefile.sphinx:31: *** only one `else' per conditional. Stop.
make: *** [help] Error 2

The first breakage was introduced by commit c8589d1e9e01 ("kbuild:
handle multi-objs dependency appropriately"). Since then (i.e. v3.18),
GNU Make 3.80 has not been able to compile the kernel for years, but
nobody has ever complained (noticed) about it.

Even GNU Make 3.81 is more than 10 years old. It would not hurt to
match the documentation with reality instead of fixing makefiles.

Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>

Hi Linus,

You acked this change already.
Could you apply this patch to your tree directly?
Thank you.

Documentation/process/changes.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
index 01c5dbc..cef7bc4 100644
--- a/Documentation/process/changes.rst
+++ b/Documentation/process/changes.rst
@@ -30,7 +30,7 @@ you probably needn't concern yourself with isdn4k-utils.
Program Minimal version Command to check the version
====================== =============== ========================================
GNU C 3.2 gcc --version
-GNU make 3.80 make --version
+GNU make 3.81 make --version
binutils 2.12 ld -v
util-linux 2.10o fdformat --version
module-init-tools 0.9.10 depmod -V