From cc3432c4d6ada44e2cb2ff80dd09f66e0614d3aa Mon Sep 17 00:00:00 2001
From: Alexey Neyman <stilor@att.net>
Date: Thu, 9 Feb 2017 13:54:50 -0800
Subject: Add notes about obsoletion policy for kernel/glibc.

Signed-off-by: Alexey Neyman <stilor@att.net>

diff --git a/config/kernel/linux.in b/config/kernel/linux.in
index a4d38ef..0886f4c 100644
--- a/config/kernel/linux.in
+++ b/config/kernel/linux.in
@@ -38,6 +38,11 @@ endif # KERNEL_LINUX_CUSTOM
 
 if ! KERNEL_LINUX_CUSTOM
 
+# GLIBC and kernel are special when it comes to obsoletion. Users
+# of crosstool-ng depend on the ability to build new toolchains matching
+# the kernel/libc versions of a particular target system, and LTS releases
+# are still using quite ancient versions. Please do not retire versions
+# (including versions in between) until the EOL dates indicated below.
 choice
     bool
     prompt "Linux kernel version"
@@ -68,6 +73,7 @@ config KERNEL_V_4_5
     prompt "4.5.7 (EOL)"
     depends on OBSOLETE
 
+# EOL 04/2021 [Ubuntu16.04]
 config KERNEL_V_4_4
     bool
     prompt "4.4.47"
@@ -120,6 +126,7 @@ config KERNEL_V_3_14
     prompt "3.14.79 (EOL)"
     depends on OBSOLETE
 
+# EOL 04/2019 [Ubuntu14.04]
 config KERNEL_V_3_13
     bool
     prompt "3.13.11 (EOL)"
@@ -134,6 +141,7 @@ config KERNEL_V_3_11
     prompt "3.11.10 (EOL)"
     depends on OBSOLETE
 
+# EOL 06/2024 [CentOS7.x]
 config KERNEL_V_3_10
     bool
     prompt "3.10.104"
@@ -172,6 +180,7 @@ config KERNEL_V_3_3
     prompt "3.3.8 (EOL)"
     depends on OBSOLETE
 
+# EOL 04/2017 [Ubuntu12.04]
 config KERNEL_V_3_2
     bool
     prompt "3.2.84"
@@ -221,6 +230,7 @@ config KERNEL_V_2_6_33
     prompt "2.6.33.7 (EOL)"
     depends on OBSOLETE
 
+# EOL 11/2020 [CentOS6.x]
 config KERNEL_V_2_6_32
     bool
     prompt "2.6.32.27 (EOL)"
diff --git a/config/libc/glibc.in b/config/libc/glibc.in
index 64272a0..9e4ff56 100644
--- a/config/libc/glibc.in
+++ b/config/libc/glibc.in
@@ -65,6 +65,11 @@ config CC_GLIBC_SHOW_LINARO
       
       Linaro: http://www.linaro.org/
 
+# GLIBC and kernel are special when it comes to obsoletion. Users
+# of crosstool-ng depend on the ability to build new toolchains matching
+# the kernel/libc versions of a particular target system, and LTS releases
+# are still using quite ancient versions. Please do not retire versions
+# (including versions in between) until the EOL dates indicated below.
 choice
     bool
     prompt "glibc version"
@@ -81,6 +86,7 @@ config LIBC_GLIBC_V_2_24
     prompt "2.24"
     select LIBC_GLIBC_2_23_or_later
 
+# EOL 04/2021 [Ubuntu16.04]
 config LIBC_GLIBC_V_2_23
     bool
     prompt "2.23"
@@ -111,6 +117,7 @@ config LIBC_GLIBC_V_2_20
     select LIBC_GLIBC_2_20_or_later
     depends on OBSOLETE
 
+# EOL 04/2019 [Ubuntu14.04]
 config LIBC_GLIBC_V_2_19
     bool
     prompt "2.19 (OBSOLETE)"
@@ -123,6 +130,7 @@ config LIBC_GLIBC_V_2_18
     depends on OBSOLETE
     select LIBC_GLIBC_2_17_or_later
 
+# EOL 06/2024 [CentOS7.x]
 config LIBC_GLIBC_V_2_17
     bool
     prompt "2.17 (OBSOLETE)"
@@ -134,6 +142,7 @@ config LIBC_GLIBC_V_2_16_0
     prompt "2.16.0 (OBSOLETE)"
     depends on OBSOLETE
 
+# EOL 04/2017 [Ubuntu12.04]
 config LIBC_GLIBC_V_2_15
     bool
     prompt "2.15 (OBSOLETE)"
@@ -161,6 +170,7 @@ config LIBC_GLIBC_V_2_12_2
     depends on OBSOLETE
     depends on !LIBC_GLIBC_NEEDS_PORTS
 
+# EOL 11/2020 [CentOS6.x]
 config LIBC_GLIBC_V_2_12_1
     bool
     prompt "2.12.1 (OBSOLETE)"
-- 
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