[openwrt/openwrt] build: cleanup SSP_SUPPORT configure option

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.lede-project.org/241e6dd3e92c4f215b8ac75379a4b5aeaeb92171

commit 241e6dd3e92c4f215b8ac75379a4b5aeaeb92171
Author: Julien Dusser <julien.dusser at free.fr>
AuthorDate: Sun Jan 7 18:47:21 2018 +0100

    build: cleanup SSP_SUPPORT configure option
    
    Configure variable SSP_SUPPORT is ambiguous for packages (tor, openssh,
    avahi, freeswitch). It means 'toolchain supporting SSP', but for toolchain
    and depends it means 'build gcc with libssp'.
    
    Musl no longer uses libssp (1877bc9d8f), it has internal support, so
    SSP_SUPPORT was disabled leading some package to not use SSP.
    
    No information why Glibc and uClibc use libssp, but they may also provide
    their own SSP support. uClibc used it own with commit 933b588e25 but it was
    reverted in f3cacb9e84 without details.
    
    Create an new configure GCC_LIBSSP and automatically enable SSP_SUPPORT
    if either USE_MUSL or GCC_LIBSSP.
    
    Signed-off-by: Julien Dusser <julien.dusser at free.fr>
---
 config/Config-build.in          | 4 ++--
 include/package-defaults.mk     | 2 +-
 package/libs/toolchain/Makefile | 2 +-
 toolchain/Config.in             | 4 ++++
 toolchain/gcc/Config.in         | 4 ++--
 toolchain/gcc/common.mk         | 2 +-
 6 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/config/Config-build.in b/config/Config-build.in
index 660da1c..a082a5e 100644
--- a/config/Config-build.in
+++ b/config/Config-build.in
@@ -210,11 +210,11 @@ menu "Global build settings"
 			bool "None"
 		config PKG_CC_STACKPROTECTOR_REGULAR
 			bool "Regular"
-			select SSP_SUPPORT if !USE_MUSL
+			select GCC_LIBSSP if !USE_MUSL
 			depends on KERNEL_CC_STACKPROTECTOR_REGULAR
 		config PKG_CC_STACKPROTECTOR_STRONG
 			bool "Strong"
-			select SSP_SUPPORT if !USE_MUSL
+			select GCC_LIBSSP if !USE_MUSL
 			depends on !GCC_VERSION_4_8
 			depends on KERNEL_CC_STACKPROTECTOR_STRONG
 	endchoice
diff --git a/include/package-defaults.mk b/include/package-defaults.mk
index 0bca076..6bbfdcc 100644
--- a/include/package-defaults.mk
+++ b/include/package-defaults.mk
@@ -5,7 +5,7 @@
 # See /LICENSE for more information.
 #
 
-PKG_DEFAULT_DEPENDS = +libc +SSP_SUPPORT:libssp +USE_GLIBC:librt +USE_GLIBC:libpthread
+PKG_DEFAULT_DEPENDS = +libc +GCC_LIBSSP:libssp +USE_GLIBC:librt +USE_GLIBC:libpthread
 
 ifneq ($(PKG_NAME),toolchain)
   PKG_FIXUP_DEPENDS = $(if $(filter kmod-%,$(1)),$(2),$(PKG_DEFAULT_DEPENDS) $(filter-out $(PKG_DEFAULT_DEPENDS),$(2)))
diff --git a/package/libs/toolchain/Makefile b/package/libs/toolchain/Makefile
index ce0acd1..febc7c2 100644
--- a/package/libs/toolchain/Makefile
+++ b/package/libs/toolchain/Makefile
@@ -83,7 +83,7 @@ endef
 
 define Package/libssp
 $(call Package/gcc/Default)
-  DEPENDS+=@SSP_SUPPORT
+  DEPENDS+=@GCC_LIBSSP
   TITLE:=GCC support library
 endef
 
diff --git a/toolchain/Config.in b/toolchain/Config.in
index bf7b9c3..3de2b10 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -286,6 +286,10 @@ config USE_MUSL
 	default y if !TOOLCHAINOPTS && !EXTERNAL_TOOLCHAIN && !NATIVE_TOOLCHAIN && !(arc || powerpc64)
 	bool
 
+config SSP_SUPPORT
+	default y if USE_MUSL || GCC_LIBSSP
+	bool
+
 config USE_EXTERNAL_LIBC
 	bool
 	default y if EXTERNAL_TOOLCHAIN || NATIVE_TOOLCHAIN
diff --git a/toolchain/gcc/Config.in b/toolchain/gcc/Config.in
index 0fe0ea2..30ac137 100644
--- a/toolchain/gcc/Config.in
+++ b/toolchain/gcc/Config.in
@@ -52,9 +52,9 @@ config GCC_DEFAULT_SSP
 	help
 	    Use gcc configure option --enable-default-ssp to turn on -fstack-protector-strong by default.
 
-config SSP_SUPPORT
+config GCC_LIBSSP
 	bool
-	prompt "Enable Stack-Smashing Protection support" if TOOLCHAINOPTS
+	prompt "Build gcc libssp" if TOOLCHAINOPTS
 	depends on !USE_MUSL
 	default y if !USE_MUSL
 	help
diff --git a/toolchain/gcc/common.mk b/toolchain/gcc/common.mk
index ece71ef..fafc0c1 100644
--- a/toolchain/gcc/common.mk
+++ b/toolchain/gcc/common.mk
@@ -143,7 +143,7 @@ ifneq ($(CONFIG_GCC_DEFAULT_SSP),)
 		--enable-default-ssp
 endif
 
-ifneq ($(CONFIG_SSP_SUPPORT),)
+ifneq ($(CONFIG_GCC_LIBSSP),)
   GCC_CONFIGURE+= \
 		--enable-libssp
 else