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Fabrice Fontaine 3d60f6684c utils/genrandconfig: disable libopenssl without atomics 
libopenssl needs atomic or the build will fail (e.g. on sparcv8 without
libatomic):

${LDCMD:-/nvmedata/autobuild/instance-7/output-1/host/bin/sparc-buildroot-linux-uclibc-gcc}  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O0 -g2  -g2  -L.   \
	-o apps/openssl apps/asn1pars.o apps/ca.o apps/ciphers.o apps/cms.o apps/crl.o apps/crl2p7.o apps/dgst.o apps/dhparam.o apps/dsa.o apps/dsaparam.o apps/ec.o apps/ecparam.o apps/enc.o apps/engine.o apps/errstr.o apps/gendsa.o apps/genpkey.o apps/genrsa.o apps/nseq.o apps/ocsp.o apps/openssl.o apps/passwd.o apps/pkcs12.o apps/pkcs7.o apps/pkcs8.o apps/pkey.o apps/pkeyparam.o apps/pkeyutl.o apps/prime.o apps/rand.o apps/rehash.o apps/req.o apps/rsa.o apps/rsautl.o apps/s_client.o apps/s_server.o apps/s_time.o apps/sess_id.o apps/smime.o apps/speed.o apps/spkac.o apps/srp.o apps/storeutl.o apps/ts.o apps/verify.o apps/version.o apps/x509.o \
	 apps/libapps.a -lssl -lcrypto -ldl
/nvmedata/autobuild/instance-7/output-1/host/lib/gcc/sparc-buildroot-linux-uclibc/10.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: ./libssl.so: undefined reference to `__atomic_fetch_sub_4'

It should be noted that openssl3 has added OPENSSL_DEV_NO_ATOMICS but
"this is intended for internal development only, to check the
refcounting is properly coded.  It should never become a configuration
option, hence the name of the macro.":
503d4745a1

Atomics are not available in Buildroot if:
 - architecture is 32 bit and something other than ARM or xtensa, and
 - GCC < 4.8 or no threads or FLAT.

The nothreads case can theoretically happen in many different
situations, but in practice nobody disables threads. So the only
interesting case is the FLAT case. Since ARM and RISC-V 64 both have
atomics intrinsics, that leaves just m68k NOMMU as FLAT. So this is
truly a corner case.

The proper solution would be to patch GCC to also provide libatomic in
those cases.
- For nothreads, atomics are in fact not needed, so libatomic can simply
  be implemented as stubs.
- For FLAT, it's probably just a matter of having a match to uclinux in
  libatomic/configure.tgt.

Again, though, this happens only in such niche cases that it's not worth
working on it.

Fixes:
 - http://autobuild.buildroot.org/results/bce526d538f43a541fdfbc0c9b4a7cecebbbc539

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit af494d92d3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2022-09-29 15:53:46 +02:00
arch arch/xtensa: custom configuration requires an overlay 2022-09-08 11:44:22 +02:00
board board/freescale/common/imx: align u-boot-spl to 4 bytes 2022-08-23 23:29:19 +02:00
boot boot/mv-ddr-marvell: bump to latest commit 2022-09-06 22:12:32 +02:00
configs configs/rockpro64: Use mainline ATF 2022-09-06 22:03:01 +02:00
docs Update for 2022.08 2022-09-10 17:00:09 +02:00
fs fs/tar: add option for zstd compression 2022-07-23 22:40:01 +02:00
linux {linux, linux-headers}: bump 4.{9, 14, 19}.x / 5.{4, 10, 15}.x series 2022-09-09 21:48:51 +02:00
package package/expat: fix CVE-2022-40674 2022-09-29 15:51:10 +02:00
support support/config-fragments/autobuild/bootlin-armv7m-uclibc.config: specify configuration more precisely 2022-09-22 14:32:48 +02:00
system package/systemd: add setting for systemd default.target 2022-05-02 22:58:44 +02:00
toolchain toolchain/Config.in: update gcc bug 90620 2022-09-18 23:15:00 +02:00
utils utils/genrandconfig: disable libopenssl without atomics 2022-09-29 15:53:46 +02:00
.clang-format .clang-format: initial import from Linux 5.15.6 2022-01-01 15:01:13 +01:00
.defconfig arch: remove support for sh64 2016-09-08 22:15:15 +02:00
.flake8 Revert ".flake8: fix check for 80/132 columns" 2021-01-02 17:38:20 +01:00
.gitignore
.gitlab-ci.yml utils/checkpackagelib/lib_sysv: run shellcheck 2022-02-06 18:27:03 +01:00
.shellcheckrc utils/check-package: improve shellcheck reproducibility 2022-07-25 23:52:47 +02:00
CHANGES Update for 2022.08 2022-09-10 17:00:09 +02:00
Config.in Config.in: move toolchain menu before build options 2022-07-27 11:11:19 +02:00
Config.in.legacy Config.in.legacy: add missing select 2022-08-15 11:03:38 +02:00
COPYING
DEVELOPERS DEVELOPERS: Add Yann (at work) for gpsd 2022-09-21 22:37:40 +02:00
Makefile Update for 2022.08 2022-09-10 17:00:09 +02:00
Makefile.legacy Remove BR2_DEPRECATED 2016-10-15 23:14:45 +02:00
README docs: move the IRC channel away from Freenode 2021-05-29 22:16:23 +02:00

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 OFTC IRC.

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