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Fabrice Fontaine 288b517193 boost: context needs thread if gcc < 6 Commit `f3a483a81b` added -std=c++11 to boost build if context is selected and gcc is at least 4.7 however it has the side effect that cc-tool fails to find boost_system with the following error if context and system is enabled with a gcc greater than 6: configure:16312: /home/dawncrow/buildroot-test/scripts/instance-0/output/host/bin/x86_64-linux-g++ -o conftest -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I/home/dawncrow/buildroot-test/scripts/instance-0/output/host/x86_64-buildroot-linux-musl/sysroot/usr/include -L/home/dawncrow/buildroot-test/scripts/instance-0/output/host/x86_64-buildroot-linux-musl/sysroot/usr/lib conftest.o -lboost_system -latomic >&5 conftest.o: In function `boost::system::error_category::std_category::equivalent(int, std::error_condition const&) const': conftest.cpp:(.text._ZNK5boost6system14error_category12std_category10equivalentEiRKSt15error_condition[_ZNK5boost6system14error_category12std_category10equivalentEiRKSt15error_condition]+0x37): undefined reference to `boost::system::detail::generic_category_instance' This error is related to the fact that since boost 1.68 and commit `7b6dcf6ac6`, boost system headers are now C++14 "by default" with gcc above 6: - https://github.com/boostorg/system/issues/24 - https://github.com/boostorg/system/issues/26 - https://lists.boost.org/Archives/boost/2018/08/242770.php So when building with gcc > 6, cc-tool thinks that boost has generic_category_instance but because boost was compiled with std=c++11, this function will not be in the library causing a link error Instead of "hacking" even more boost, just remove -std=c++11 from boost.mk and select BOOST_THREAD with gcc lower than 6 Fixes: - http://autobuild.buildroot.org/results/fc8f8a64751c751b2b66301967cc008509bbaa70 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Tested-by: Matt Weber <matthew.weber@rockwellcollins.com> Reviewed-by: Ferdinand van Aartsen <ferdinand@ombud.nl> Tested-by: Ferdinand van Aartsen <ferdinand@ombud.nl> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>		2018-10-26 17:09:51 +02:00
arch	arch: drop BR2_GCC_TARGET_CPU_REVISION option	2018-10-01 14:52:32 +02:00
board	configs/odroidxu4: new defconfig	2018-10-21 11:00:04 +02:00
boot	boot/xloader: remove package	2018-10-26 16:59:05 +02:00
configs	configs/odroidxu4: new defconfig	2018-10-21 11:00:04 +02:00
docs	docs/website: update for 2018.02.7	2018-10-25 21:10:20 +02:00
fs	fs/common: allow custom user table to override package-defined users	2018-10-20 14:33:24 +01:00
linux	linux: add custom linux boot logo option	2018-10-21 18:16:29 +02:00
package	boost: context needs thread if gcc < 6	2018-10-26 17:09:51 +02:00
support	support/testing: test_hardening fix flake8 whitespace	2018-10-20 17:27:28 +02:00
system	system: update Config.in comment about systemd dependencies	2018-09-15 00:05:48 +02:00
toolchain	toolchain: move glibc nsswitch.conf handling to a post-target hook	2018-10-21 01:50:35 +02:00
utils	scancpan: add PERL_FOO_DISTNAME in perl-foo.mk	2018-10-24 00:22:13 +01:00
.defconfig
.flake8	.flake8: ignore utils/diffconfig	2018-03-13 22:37:54 +01:00
.gitignore
.gitlab-ci.yml	.gitlab-ci.yml: do runtime tests only on explicit trigger	2018-10-21 23:34:18 +02:00
.gitlab-ci.yml.in	.gitlab-ci.yml: do runtime tests only on explicit trigger	2018-10-21 23:34:18 +02:00
CHANGES	Update for 2018.02.7	2018-10-25 21:07:23 +02:00
Config.in	core: support host gcc of the future	2018-10-23 11:43:35 +02:00
Config.in.legacy	boot/xloader: remove package	2018-10-26 16:59:05 +02:00
COPYING
DEVELOPERS	bluez5_utils-headers: new package	2018-10-21 16:35:31 +01:00
Makefile	core: support host gcc of the future	2018-10-23 11:43:35 +02:00
Makefile.legacy
README

README

Buildroot is a simple, efficient and easy-to-use tool to generate embedded
Linux systems through cross-compilation.

The documentation can be found in docs/manual. You can generate a text
document with 'make manual-text' and read output/docs/manual/manual.text.
Online documentation can be found at http://buildroot.org/docs.html

To build and use the buildroot stuff, do the following:

1) run 'make menuconfig'
2) select the target architecture and the packages you wish to compile
3) run 'make'
4) wait while it compiles
5) find the kernel, bootloader, root filesystem, etc. in output/images

You do not need to be root to build or run buildroot.  Have fun!

Buildroot comes with a basic configuration for a number of boards. Run
'make list-defconfigs' to view the list of provided configurations.

Please feed suggestions, bug reports, insults, and bribes back to the
buildroot mailing list: buildroot@buildroot.org
You can also find us on #buildroot on Freenode IRC.

If you would like to contribute patches, please read
https://buildroot.org/manual.html#submitting-patches