Make --enable-obsolete-rpc an option in ct-ng

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

config/libc/glibc.in

@@ -90,6 +90,15 @@ config GLIBC_NO_SPARC_V8
     def_bool y
     depends on GLIBC_2_23_or_later
 
+# 2.14 obsoleted Sun RPC code, making it unavailable *at all* for compiling/linking
+# (only remained as versioned symbols for previously linked binaries). They backpedaled
+# in 2.16, adding an option to enable that code. Crosstool-NG backports that code
+# to 2.14/2.15, but there is no harm in throwing this option even if that patch
+# is not applied.
+config GLIBC_HAS_OBSOLETE_RPC
+    def_bool y
+    depends on GLIBC_2_14_or_later
+
 config GLIBC_EXTRA_CONFIG_ARRAY
     string
     prompt "extra config"
@@ -123,6 +132,13 @@ config GLIBC_EXTRA_CFLAGS
     help
       Extra target CFLAGS to use when building.
 
+config GLIBC_ENABLE_OBSOLETE_RPC
+    bool "Enable obsolete (Sun) RPC"
+    default y
+    depends on GLIBC_HAS_OBSOLETE_RPC
+    help
+      Allow building applications using obsolete (Sun) RPC.
+
 config GLIBC_ENABLE_FORTIFIED_BUILD
     bool
     prompt "Enable fortified build (EXPERIMENTAL)"

packages/glibc/package.desc

@@ -1,5 +1,5 @@
 origin='GNU'
 repository='git git://sourceware.org/git/glibc.git'
 mirrors='$(CT_Mirrors GNU glibc)'
-milestones='2.17 2.20 2.23 2.24'
+milestones='2.14 2.17 2.20 2.23 2.24'
 archive_formats='.tar.xz .tar.bz2 .tar.gz'

scripts/build/libc/glibc.sh

@@ -128,8 +128,9 @@ do_libc_backend_once() {
     # Also, if those two are missing, iconv build breaks
     extra_config+=( --disable-debug --disable-sanity-checks )
 
-    # always include rpc, the user can still override it with TI-RPC
-    extra_config+=( --enable-obsolete-rpc )
+    if [ "${CT_GLIBC_ENABLE_OBSOLETE_RPC}" = "y" ]; then
+        extra_config+=( --enable-obsolete-rpc )
+    fi
 
     # Add some default glibc config options if not given by user.
     # We don't need to be conditional on whether the user did set different