Merge tag 'kbuild-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - fix build rules in binderfs sample

 - fix build errors when Kbuild recurses to the top Makefile

 - covert '---help---' in Kconfig to 'help'

* tag 'kbuild-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  treewide: replace '---help---' in Kconfig files with 'help'
  kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables
  samples: binderfs: really compile this sample and fix build issues

samples/Kconfig

@@ -185,7 +185,7 @@ config SAMPLE_VFIO_MDEV_MBOCHS
 
 config SAMPLE_ANDROID_BINDERFS
 	bool "Build Android binderfs example"
-	depends on ANDROID_BINDERFS
+	depends on CC_CAN_LINK && HEADERS_INSTALL
 	help
 	  Builds a sample program to illustrate the use of the Android binderfs
 	  filesystem.

samples/Makefile

@@ -2,7 +2,7 @@
 # Makefile for Linux samples code
 
 subdir-$(CONFIG_SAMPLE_AUXDISPLAY)	+= auxdisplay
-obj-$(CONFIG_SAMPLE_ANDROID_BINDERFS)	+= binderfs/
+subdir-$(CONFIG_SAMPLE_ANDROID_BINDERFS) += binderfs
 obj-$(CONFIG_SAMPLE_CONFIGFS)		+= configfs/
 obj-$(CONFIG_SAMPLE_CONNECTOR)		+= connector/
 subdir-$(CONFIG_SAMPLE_HIDRAW)		+= hidraw

samples/binderfs/Makefile

@@ -1,6 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
-ifndef CROSS_COMPILE
-ifdef CONFIG_SAMPLE_ANDROID_BINDERFS
-hostprogs := binderfs_example
-endif
-endif
+userprogs := binderfs_example
+always-y := $(userprogs)
+
+userccflags += -I usr/include

samples/binderfs/binderfs_example.c

@@ -18,7 +18,6 @@
 int main(int argc, char *argv[])
 {
 	int fd, ret, saved_errno;
-	size_t len;
 	struct binderfs_device device = { 0 };
 
 	ret = unshare(CLONE_NEWNS);