From b933f9cf0cb254e368027cad6d5799e45b237df5 Mon Sep 17 00:00:00 2001
From: Ian Cooper <iancooper@hotmail.com>
Date: Mon, 15 Jun 2020 22:14:04 +0100
Subject: toolchain: remove gcc libssp and use libc variant

Removes the standalone implementation of stack smashing protection
in gcc's libssp in favour of the native implementation available
in glibc and uclibc. Musl libc already uses its native ssp, so this
patch does not affect musl-based toolchains.

Stack smashing protection configuration options are now uniform
across all supported libc variants.

This also makes kernel-level stack smashing protection available
for x86_64 and i386 builds using non-musl libc.

Signed-off-by: Ian Cooper <iancooper@hotmail.com>
---
 package/libs/toolchain/Makefile | 41 -----------------------------------------
 1 file changed, 41 deletions(-)

(limited to 'package/libs/toolchain')

diff --git a/package/libs/toolchain/Makefile b/package/libs/toolchain/Makefile
index c13e9e4928..f92a1779da 100644
--- a/package/libs/toolchain/Makefile
+++ b/package/libs/toolchain/Makefile
@@ -83,33 +83,6 @@ define Package/libatomic/config
 	endmenu
 endef
 
-define Package/libssp
-$(call Package/gcc/Default)
-  DEPENDS+=@GCC_LIBSSP
-  TITLE:=GCC support library
-endef
-
-define Package/libssp/config
-	menu "Configuration"
-		depends on EXTERNAL_TOOLCHAIN && PACKAGE_libssp
-
-	config LIBSSP_ROOT_DIR
-		string
-		prompt "libssp shared library base directory"
-		depends on EXTERNAL_TOOLCHAIN && PACKAGE_libssp
-		default TOOLCHAIN_ROOT  if !NATIVE_TOOLCHAIN
-		default "/"  if NATIVE_TOOLCHAIN
-
-	config LIBSSP_FILE_SPEC
-		string
-		prompt "libssp shared library files (use wildcards)"
-		depends on EXTERNAL_TOOLCHAIN && PACKAGE_libssp
-		default "./lib/libssp.so.*"
-
-	endmenu
-endef
-
-
 define Package/libstdcpp
 $(call Package/gcc/Default)
   NAME:=libstdc++
@@ -519,11 +492,6 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 	$(CP) $(TOOLCHAIN_DIR)/lib/libgfortran.so.* $(1)/usr/lib/
   endef
 
-  define Package/libssp/install
-	$(INSTALL_DIR) $(1)/lib
-	$(CP) $(TOOLCHAIN_DIR)/lib/libssp.so.* $(1)/lib/
-  endef
-
   define Package/libstdcpp/install
 	$(INSTALL_DIR) $(1)/usr/lib
 	$(CP) $(TOOLCHAIN_DIR)/lib/libstdc++.so.* $(1)/usr/lib/
@@ -670,14 +638,6 @@ else
 	done
   endef
 
-  define Package/libssp/install
-	for file in $(call qstrip,$(CONFIG_LIBSSP_FILE_SPEC)); do \
-		$(INSTALL_DIR) $(1)/lib ; \
-		$(CP) $(call qstrip,$(CONFIG_LIBSSP_ROOT_DIR))/$$$$file $(1)/lib/ ; \
-	done ; \
-	exit 0
-  endef
-
   define Package/libstdcpp/install
 	for file in $(call qstrip,$(CONFIG_LIBSTDCPP_FILE_SPEC)); do \
 		$(INSTALL_DIR) $(1)/lib ; \
@@ -789,7 +749,6 @@ endif
 $(eval $(call BuildPackage,libc))
 $(eval $(call BuildPackage,libgcc))
 $(eval $(call BuildPackage,libatomic))
-$(eval $(call BuildPackage,libssp))
 $(eval $(call BuildPackage,libstdcpp))
 $(eval $(call BuildPackage,libasan))
 $(eval $(call BuildPackage,libtsan))
-- 
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