From de81a59714893eb13207eb597cda1980f124c45c Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN\"" <yann.morin.1998@anciens.enib.fr>
Date: Thu, 11 Nov 2010 01:11:17 +0100
Subject: libc/*glibc: enable selection of the oldest supported ABI

[Yann E. MORIN: split the original patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff --git a/config/libc/glibc-eglibc.in-common b/config/libc/glibc-eglibc.in-common
index 3244c01..7e4f267 100644
--- a/config/libc/glibc-eglibc.in-common
+++ b/config/libc/glibc-eglibc.in-common
@@ -65,6 +65,18 @@ config LIBC_DISABLE_VERSIONING
     help
       Do not include versioning information in the library objects.
 
+config LIBC_OLDEST_ABI
+    string
+    prompt "Oldest supported ABI"
+    default ""
+    help
+      Set the oldest ABI supported by the C library.
+      
+      Setting this option, for example, to 2.2 will provide ABI support
+      back to (e)glibc-2.2.
+
+      If this option is not set, (e)glibc will choose for you.
+
 config LIBC_GLIBC_USE_PORTS
     bool
     prompt "Use the ports addon"
diff --git a/scripts/build/libc/eglibc.sh b/scripts/build/libc/eglibc.sh
index 86f5203..b9004bb 100644
--- a/scripts/build/libc/eglibc.sh
+++ b/scripts/build/libc/eglibc.sh
@@ -296,6 +296,10 @@ do_libc() {
         extra_config+=("--disable-versioning")
     fi
 
+    if [ "${CT_LIBC_OLDEST_ABI}" != "" ]; then
+        extra_config+=("--enable-oldest-abi=${CT_LIBC_OLDEST_ABI}")
+    fi
+
     case "$(do_libc_add_ons_list ,)" in
         "") ;;
         *)  extra_config+=("--enable-add-ons=$(do_libc_add_ons_list ,)");;
diff --git a/scripts/build/libc/glibc.sh b/scripts/build/libc/glibc.sh
index 1543eef..2bed861 100644
--- a/scripts/build/libc/glibc.sh
+++ b/scripts/build/libc/glibc.sh
@@ -373,6 +373,10 @@ do_libc() {
         extra_config+=("--disable-versioning")
     fi
 
+    if [ "${CT_LIBC_OLDEST_ABI}" != "" ]; then
+        extra_config+=("--enable-oldest-abi=${CT_LIBC_OLDEST_ABI}")
+    fi
+
     case "$(do_libc_add_ons_list ,)" in
         "") ;;
         *)  extra_config+=("--enable-add-ons=$(do_libc_add_ons_list ,)");;
-- 
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