kbuild: Use uname for LINUX_COMPILE_HOST detection

`hostname` may not be present on some systems as it's not mandated by
POSIX/SUSv4. This isn't just a theoretical problem: on Arch Linux,
`hostname` is provided by `inetutils`, which isn't part of the base
distribution.

    ./scripts/mkcompile_h: line 38: hostname: command not found

Use `uname -n` instead, which is more likely to be available (and
mandated by standards).

Signed-off-by: Chris Down <chris@chrisdown.name>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index baf3ab8..4ae7350 100755 (executable)
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -35,7 +35,7 @@ else
        LINUX_COMPILE_BY=$KBUILD_BUILD_USER
 fi
 if test -z "$KBUILD_BUILD_HOST"; then
-       LINUX_COMPILE_HOST=`hostname`
+       LINUX_COMPILE_HOST=`uname -n`
 else
        LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
 fi