f0c37f6ceb
If we enable -fstack-protector while building libunwind, function
__stack_chk_fail_local will be referred to for i386 and powerpc32
arches. This will cause link failure because the default gcc build
specs says no link_ssp if -nostdlib is given.
The error message:
OpenWrt-libtool: link: ccache_cc -shared -fPIC -DPIC .libs/os-linux.o mi/.libs/init.o mi/.libs/flush_cache.o mi/.libs/mempool.o mi/.libs/strerror.o x86/.libs/is_fpreg.o x86/.libs/regname.o x86/.libs/Los-linux.o mi/.libs/backtrace.o mi/.libs/dyn-cancel.o mi/.libs/dyn-info-list.o mi/.libs/dyn-register.o mi/.libs/Ldyn-extract.o mi/.libs/Lfind_dynamic_proc_info.o mi/.libs/Lget_accessors.o mi/.libs/Lget_proc_info_by_ip.o mi/.libs/Lget_proc_name.o mi/.libs/Lput_dynamic_unwind_info.o mi/.libs/Ldestroy_addr_space.o mi/.libs/Lget_reg.o mi/.libs/Lset_reg.o mi/.libs/Lget_fpreg.o mi/.libs/Lset_fpreg.o mi/.libs/Lset_caching_policy.o x86/.libs/Lcreate_addr_space.o x86/.libs/Lget_save_loc.o x86/.libs/Lglobal.o x86/.libs/Linit.o x86/.libs/Linit_local.o x86/.libs/Linit_remote.o x86/.libs/Lget_proc_info.o x86/.libs/Lregs.o x86/.libs/Lresume.o x86/.libs/Lstep.o x86/.libs/getcontext-linux.o -Wl,--whole-archive ./.libs/libunwind-dwarf-local.a ./.libs/libunwind-elf32.a -Wl,--no-whole-archive -L/var/lib/bbmnt/buildbot/slaves/dave-builder/i386_i486/build/sdk/staging_dir/target-i386_i486_musl-1.1.16/usr/lib -L/var/lib/bbmnt/buildbot/slaves/dave-builder/i386_i486/build/sdk/staging_dir/target-i386_i486_musl-1.1.16/lib -L/var/lib/bbmnt/buildbot/slaves/dave-builder/i386_i486/build/sdk/staging_dir/toolchain-i386_i486_gcc-5.4.0_musl-1.1.16/usr/lib -L/var/lib/bbmnt/buildbot/slaves/dave-builder/i386_i486/build/sdk/staging_dir/toolchain-i386_i486_gcc-5.4.0_musl-1.1.16/lib -lc -lgcc -Os -march=i486 -fstack-protector -Wl,-z -Wl,now -Wl,-z -Wl,relro -nostartfiles -nostdlib -Wl,-soname -Wl,libunwind.so.8 -o .libs/libunwind.so.8.0.1
.libs/os-linux.o: In function `_Ux86_get_elf_image':
os-linux.c:(.text+0x588): undefined reference to `__stack_chk_fail_local'
x86/.libs/Lregs.o: In function `_ULx86_access_fpreg':
Lregs.c:(.text+0x25b): undefined reference to `__stack_chk_fail_local'
x86/.libs/Lresume.o: In function `_ULx86_resume':
Lresume.c:(.text+0xdc): undefined reference to `__stack_chk_fail_local'
collect2: error: ld returned 1 exit status
Makefile:2249: recipe for target 'libunwind.la' failed
The snippet from gcc -dumpspecs
%{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
58 lines
1.5 KiB
Makefile
58 lines
1.5 KiB
Makefile
#
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# Copyright (C) 2008-2013 OpenWrt.org
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# Copyright (C) 2017 Yousong Zhou <yszhou4tech@gmail.com>
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk
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PKG_NAME:=libunwind
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PKG_VERSION:=1.2.1
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PKG_RELEASE:=2
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PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
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PKG_SOURCE_URL:=@SAVANNAH/$(PKG_NAME)
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PKG_HASH:=3f3ecb90e28cbe53fba7a4a27ccce7aad188d3210bb1964a923a731a27a75acb
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PKG_FIXUP:=autoreconf
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PKG_INSTALL:=1
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PKG_LICENSE:=X11
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PKG_LICENSE_FILES:=LICENSE
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PKG_MAINTAINER:=Yousong Zhou <yszhou4tech@gmail.com>
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PKG_SSP:=0
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include $(INCLUDE_DIR)/package.mk
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define Package/libunwind
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SECTION:=libs
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CATEGORY:=Libraries
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TITLE:=The libunwind project
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URL:=http://www.nongnu.org/libunwind/
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DEPENDS:=@(mips||mipsel||powerpc||i386||x86_64)
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endef
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define Package/libunwind/description
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Libunwind defines a portable and efficient C programming interface (API) to determine the call-chain of a program.
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endef
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CONFIGURE_ARGS += \
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--disable-documentation \
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--enable-minidebuginfo=no \
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define Package/libunwind/install
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$(INSTALL_DIR) $(1)/usr/lib
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$(CP) $(PKG_INSTALL_DIR)/usr/lib/libunwin*.so* $(1)/usr/lib/
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endef
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define Build/InstallDev
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$(INSTALL_DIR) $(1)/usr/include $(1)/usr/lib/pkgconfig
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$(CP) $(PKG_INSTALL_DIR)/usr/include/*.h $(1)/usr/include
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$(CP) $(PKG_INSTALL_DIR)/usr/lib/libunwin*.so* $(1)/usr/lib
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$(CP) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/* $(1)/usr/lib/pkgconfig/
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endef
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$(eval $(call BuildPackage,libunwind))
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