Merge pull request #46 from stefanct/master

Add glibc 2.21

config/libc/glibc.in

@@ -6,7 +6,7 @@
 ## select CC_CORE_PASSES_NEEDED
 ##
 ## help The de-facto standard for Linux distributions.
-## help Feature-rich, but large...  Most usefull for desktop-like systems.
+## help Feature-rich, but large...  Most useful for desktop-like systems.
 
 config THREADS
     default "nptl"
@@ -17,6 +17,11 @@ choice
 # Don't remove next line
 # CT_INSERT_VERSION_BELOW
 
+config LIBC_GLIBC_V_2_21
+    bool
+    prompt "2.21"
+    select LIBC_GLIBC_2_20_or_later
+
 config LIBC_GLIBC_LINARO_V_2_20
     bool
     prompt "Linaro 2.20-2014.11"
@@ -131,6 +136,7 @@ config LIBC_VERSION
     string
 # Don't remove next line
 # CT_INSERT_VERSION_STRING_BELOW
+    default "2.21" if LIBC_GLIBC_V_2_21
     default "linaro-2.20-2014.11" if LIBC_GLIBC_LINARO_V_2_20
     default "2.20" if LIBC_GLIBC_V_2_20
     default "2.19" if LIBC_GLIBC_V_2_19