package/linux-headers: add help text for manual header selection

Add kconfig help text that explains how to manually specify an
official Linux version to use for the kernel headers.

Signed-off-by: Mark Corbin <mark.corbin@embecosm.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

diff --git a/package/linux-headers/Config.in.host b/package/linux-headers/Config.in.host
index 400258f6f1191a5c499ebbc1526c750c32db40f0..9f31bad9c31f89cdd229d4b2410a4c3eb870a627 100644 (file)
--- a/package/linux-headers/Config.in.host
+++ b/package/linux-headers/Config.in.host
@@ -77,6 +77,14 @@ config BR2_KERNEL_HEADERS_4_17
 
 config BR2_KERNEL_HEADERS_VERSION
        bool "Manually specified Linux version"
+       help
+         This option allows you to use a specific official version from
+         kernel.org, like 2.6.x, 2.6.x.y, 3.x.y, ...
+
+         Note: you cannot use this option to select a _longterm_ 2.6
+         kernel, because these kernels are not located at the standard
+         URL at kernel.org. Instead, select "Custom tarball" and
+         specify the right URL directly.
 
 endchoice