warn about use of uninstalled kernel headers
User applications frequently hit problems when they try to use
the kernel headers directly, rather than the exported headers.
This adds an explicit warning for this case, and points to
a URL holding an explanation of why this is wrong and what
to do about it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/headers_install.pl b/scripts/headers_install.pl
index c6ae405..b89ca2c 100644
--- a/scripts/headers_install.pl
+++ b/scripts/headers_install.pl
@@ -20,7 +20,7 @@
my ($readdir, $installdir, $arch, @files) = @ARGV;
-my $unifdef = "scripts/unifdef -U__KERNEL__";
+my $unifdef = "scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__";
foreach my $file (@files) {
local *INFILE;