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cd901ef1a6
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Yousong Zhou cd901ef1a6 libunwind: disable building with ssp 
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>
(cherry picked from commit f0c37f6ceb)
2017-12-13 16:43:37 +01:00
.github Add Issue submission template (redirect to bugs.lede-project.org) 2016-09-01 09:01:04 -04:00
config config: make CONFIG_ALL_* select other CONIFG_ALL_* options 2017-12-13 16:29:22 +01:00
include build: remove @ as it's causing an error 2017-12-13 16:34:40 +01:00
package libunwind: disable building with ssp 2017-12-13 16:43:37 +01:00
scripts scripts/dowload.pl: use glob to expand target dir 2017-12-13 16:29:22 +01:00
target ar71xx: fix switch port numbering on RB750r2 and RB750UPr2 2017-12-13 16:29:22 +01:00
toolchain build: remove old kernel-headers build directories 2017-12-13 16:00:27 +01:00
tools tools/squashfs: use host cflags 2017-12-13 16:41:40 +01:00
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 2012-05-08 13:30:49 +00:00
.gitignore gitignore: add /overlay 2017-01-15 18:16:29 +01:00
BSDmakefile add missing copyright header 2007-02-26 01:05:09 +00:00
Config.in branding: add LEDE branding 2016-03-24 22:40:13 +01:00
feeds.conf.default LEDE v17.01.4: revert to branch defaults 2017-10-18 11:54:32 +03:00
LICENSE finally move buildroot-ng to trunk 2016-03-20 17:29:15 +01:00
Makefile Makefile: ensure that BIN_DIR exists for diffconfig 2017-01-08 18:50:00 +01:00
README README: Update project README 2016-05-12 03:29:36 +02:00
rules.mk build: Pass -iremap gcc option as a single argument 2017-12-13 14:24:21 +01:00

README 

This is the buildsystem for the LEDE Linux distribution.

Please use "make menuconfig" to choose your preferred
configuration for the toolchain and firmware.

You need to have installed gcc, binutils, bzip2, flex, python, perl, make,
find, grep, diff, unzip, gawk, getopt, subversion, libz-dev and libc headers.

Run "./scripts/feeds update -a" to get all the latest package definitions
defined in feeds.conf / feeds.conf.default respectively
and "./scripts/feeds install -a" to install symlinks of all of them into
package/feeds/.

Use "make menuconfig" to configure your image.

Simply running "make" will build your firmware.
It will download all sources, build the cross-compile toolchain, 
the kernel and all choosen applications.

To build your own firmware you need to have access to a Linux, BSD or MacOSX system
(case-sensitive filesystem required). Cygwin will not be supported because of
the lack of case sensitiveness in the file system.


Sunshine!
	Your LEDE Community
	http://www.lede-project.org