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build: cleanup SSP_SUPPORT configure option

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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@free.fr>
This commit is contained in:
Julien Dusser 2018-01-07 18:47:21 +01:00 committed by Hauke Mehrtens
parent 55779569eb
commit 241e6dd3e9
6 changed files with 11 additions and 7 deletions
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4
config/Config-build.in
View File

@ -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

2
include/package-defaults.mk
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@ -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)))

2
package/libs/toolchain/Makefile
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@ -83,7 +83,7 @@ endef
define Package/libssp
$(call Package/gcc/Default)
DEPENDS+=@SSP_SUPPORT
DEPENDS+=@GCC_LIBSSP
TITLE:=GCC support library
endef

4
toolchain/Config.in
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@ -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

4
toolchain/gcc/Config.in
View File

@ -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

2
toolchain/gcc/common.mk
View File

@ -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