Adding Glibc 2.24 support

Author: Divya-563

package/glibc/2.24/gcc8_backporting.patch

@@ -0,0 +1,19 @@
+--- glibc-2.24/misc/regexp.c_bkp	2021-10-11 01:25:18.503972709 -0700
++++ glibc-2.24/misc/regexp.c	2021-10-11 01:26:28.256366941 -0700
+@@ -30,13 +30,13 @@
+ #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23)
+ 
+ /* Define the variables used for the interface.  */
+-char *loc1;
+-char *loc2;
++char *loc1 __attribute__ ((nocommon));
++char *loc2 __attribute__ ((nocommon));
+ compat_symbol (libc, loc1, loc1, GLIBC_2_0);
+ compat_symbol (libc, loc2, loc2, GLIBC_2_0);
+ 
+ /* Although we do not support the use we define this variable as well.  */
+-char *locs;
++char *locs __attribute__ ((nocommon));
+ compat_symbol (libc, locs, locs, GLIBC_2_0);
+ 
+ 

package/glibc/2.24/glibc.hash

@@ -0,0 +1,3 @@
+# Locally calculated (fetched from Github)
+sha256  99d4a3e8efd144d71488e478f62587578c0f4e1fa0b4eed47ee3d4975ebeb5d3        glibc-2.24.tar.xz
+

package/glibc/Config.in

@@ -2,6 +2,12 @@ if BR2_TOOLCHAIN_BUILDROOT_GLIBC
 
 comment "Glibc Options"
 
+config BR2_PACKAGE_GLIBC_LEGACY
+	bool "2.24"
+	default n
+        help
+          "For Legacy deployments, Use Glibc2.24."
+
 config BR2_PACKAGE_GLIBC
 	bool
 	default y

package/glibc/glibc.mk

@@ -13,6 +13,11 @@ GLIBC_SITE = $(call github,riscv,riscv-glibc,$(GLIBC_VERSION))
 else ifeq ($(BR2_csky),y)
 GLIBC_VERSION = 7630ed2fa60caea98f500e4a7a51b88f9bf1e176
 GLIBC_SITE = $(call github,c-sky,glibc,$(GLIBC_VERSION))
+else ifeq ($(BR2_PACKAGE_GLIBC_LEGACY),y)
+GLIBC_VERSION = 2.24
+GLIBC_SITE = $(BR2_GNU_MIRROR)/libc
+GLIBC_SOURCE = glibc-$(GLIBC_VERSION).tar.xz
+GLIBC_SRC_SUBDIR = .
 else
 # Generate version string using:
 #   git describe --match 'glibc-*' --abbrev=40 origin/release/MAJOR.MINOR/master | cut -d '-' -f 2-
@@ -119,8 +124,8 @@ define GLIBC_CONFIGURE_CMDS
 	# Do the configuration
 	(cd $(@D)/build; \
 		$(TARGET_CONFIGURE_OPTS) \
-		CFLAGS="-O2 $(GLIBC_EXTRA_CFLAGS)" CPPFLAGS="" \
-		CXXFLAGS="-O2 $(GLIBC_EXTRA_CFLAGS)" \
+		CFLAGS="-Wno-error -O2 $(GLIBC_EXTRA_CFLAGS)" CPPFLAGS="" \
+		CXXFLAGS="-Wno-error -O2 $(GLIBC_EXTRA_CFLAGS)" \
 		$(GLIBC_CONF_ENV) \
 		$(SHELL) $(@D)/configure \
 		--target=$(GNU_TARGET_NAME) \