[build] Add risc-v support to gitian

ken2812221 commented at 4:08 am on July 15, 2018: contributor

Based on ~#13660~ #13710 , add gitian tarball for RISC-V

fanquake added the label Build system on Jul 15, 2018

fanquake requested review from laanwj on Jul 16, 2018

DrahtBot added the label Needs rebase on Jul 16, 2018

ken2812221 force-pushed on Jul 16, 2018

laanwj commented at 2:26 pm on July 17, 2018: member

ACK but only after we can compile with a compiler that doesn’t produce a broken test_bitcoin. If inlining is broken, who knows what other bugs are introduced. (see #13543 (comment) and following comments) Maybe Ubuntu will provide a newer version of gcc at some point.

DrahtBot removed the label Needs rebase on Jul 17, 2018

ken2812221 force-pushed on Jul 18, 2018

ken2812221 commented at 8:16 pm on July 18, 2018: contributor

@laanwj How about force it to use gcc-8?

laanwj commented at 2:09 pm on July 19, 2018: member

Yes, that was what I meant. But how?

ken2812221 commented at 3:44 pm on July 19, 2018: contributor

Just see what I do in the fourth commit.

laanwj commented at 4:38 pm on July 19, 2018: member

Didn’t know that a package for that was available! Can someone confirm that the resulting test_bitcoin runs without issues?

Edit: interesting; I wonder if this is the only way to get the -8 variant to be used. If there’s no update-alternatives incantation to update the symlinks. This would be more convenient for the build guide.

Edit no, apparently the risc-v compiler packages do not provide alternatives

MarcoFalke added the label Needs gitian build on Jul 19, 2018

laanwj commented at 4:55 pm on July 19, 2018: member

Concept ACK

laanwj requested review from theuni on Jul 19, 2018

ken2812221 force-pushed on Jul 19, 2018

in contrib/gitian-descriptors/gitian-linux.yml:23 in 0b2248cdcf outdated

24+- "g++-riscv64-linux-gnu"
25+- "g++-8-riscv64-linux-gnu"
26+- "gcc-8-riscv64-linux-gnu"
27+- "binutils-riscv64-linux-gnu"
28+- "g++-8-multilib"
29+- "gcc-8-multilib"

theuni commented at 5:49 pm on July 19, 2018:

I suspect that this will cause more glibc back-compat issues. That’s fine, of course, they just need to be accounted for.

ken2812221 commented at 6:16 pm on July 19, 2018:

I’ve tested this. make -C src check-symbol is happy about this in gitian build.

in depends/packages/qt.mk:95 in 0b2248cdcf outdated

91@@ -92,6 +92,8 @@ $(package)_config_opts_linux += -no-opengl
92 $(package)_config_opts_arm_linux += -platform linux-g++ -xplatform bitcoin-linux-g++
93 $(package)_config_opts_i686_linux  = -xplatform linux-g++-32
94 $(package)_config_opts_x86_64_linux = -xplatform linux-g++-64
95+$(package)_config_opts_aarch64_linux = -xplatform linux-aarch64-gnu-g++

theuni commented at 5:51 pm on July 19, 2018:

This shouldn’t be needed after #13696 (comment).

ken2812221 commented at 6:17 pm on July 19, 2018:

This is not my commit, just based on #13696

in src/compat/glibc_compat.cpp:70 in 0b2248cdcf outdated

66@@ -67,6 +67,8 @@ __asm(".symver log2f_old,log2f@GLIBC_2.2.5");
67 __asm(".symver log2f_old,log2f@GLIBC_2.4");
68 #elif defined(__aarch64__)
69 __asm(".symver log2f_old,log2f@GLIBC_2.17");
70+#elif defined(__riscv)

theuni commented at 5:52 pm on July 19, 2018:

Is this necessary? We don’t have to support much back-compat for riscv, as its glibc support is pretty new anyway.

ken2812221 commented at 6:17 pm on July 19, 2018:

This might not be necessary. But we should drop --enable-glibc-back-compat flag when building for RISC-V

laanwj commented at 6:39 pm on July 19, 2018:

I think he did this to appease the symbols check, the alternative would be to do a different symbols check per target platform.

ken2812221 commented at 6:45 pm on July 19, 2018:

I did this so the linker would know what log2f_old is.

theuni commented at 5:55 pm on July 19, 2018: member

Concept ACK, but I don’t think it’s wise for us to be producing supported binaries for a platform that’s still going through teething issues with compilers. Especially since so few people are able to test.

I’m all for it for 0.18, but -1 from me for 0.17.

laanwj added this to the milestone 0.18.0 on Jul 20, 2018

laanwj commented at 10:05 am on July 20, 2018: member

I’m all for it for 0.18, but -1 from me for 0.17.

Added appropriate milestone

DrahtBot removed the label Needs gitian build on Jul 21, 2018

DrahtBot commented at 1:32 pm on July 22, 2018: member

#13724 ([contrib] Support ARM and RISC-V symbol check by ken2812221)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

ken2812221 renamed this:
~~[build] Add risc-v support to gitian~~
[WIP][build] Add risc-v support to gitian
on Jul 22, 2018

DrahtBot added the label Needs rebase on Jul 29, 2018

ken2812221 force-pushed on Aug 6, 2018

DrahtBot removed the label Needs rebase on Aug 6, 2018

MarcoFalke deleted a comment on Aug 7, 2018

MarcoFalke added the label Needs gitian build on Aug 7, 2018

DrahtBot removed the label Needs gitian build on Aug 8, 2018

MarcoFalke commented at 4:43 pm on August 8, 2018: member

gitian linux failure:

 0ERROR: Feature 'system-zlib' was enabled, but the pre-condition 'libs.zlib' failed.
 1
 2ERROR: Feature 'openssl-linked' was enabled, but the pre-condition '!features.securetransport && libs.openssl' failed.
 3
 4ERROR: Feature 'xcb' was enabled, but the pre-condition 'libs.xcb' failed.
 5
 6ERROR: Feature 'system-freetype' was enabled, but the pre-condition 'features.freetype && libs.freetype' failed.
 7
 8ERROR: Feature 'fontconfig' was enabled, but the pre-condition '!config.win32 && !config.darwin && features.system-freetype && libs.fontconfig' failed.
 9funcs.mk:242: recipe for target '/home/ubuntu/build/bitcoin/depends/work/build/riscv64-linux-gnu/qt/5.9.6-c69c157d1d9/qtbase/.stamp_configured' failed
10make: *** [/home/ubuntu/build/bitcoin/depends/work/build/riscv64-linux-gnu/qt/5.9.6-c69c157d1d9/qtbase/.stamp_configured] Error 3
11make: Leaving directory '/home/ubuntu/build/bitcoin/depends'

[depends] Add riscv qt depends support for cross compiling bitcoin-qt 96dda8b058

Add risc-v 64-bit to gitian c4aecd1d80

ken2812221 force-pushed on Aug 8, 2018

ken2812221 commented at 7:36 pm on August 8, 2018: contributor

@MarcoFalke Sry, missing one line during rebasing #13710

MarcoFalke deleted a comment on Aug 8, 2018

MarcoFalke added the label Needs gitian build on Aug 8, 2018

DrahtBot removed the label Needs gitian build on Aug 9, 2018

ken2812221 commented at 5:37 am on August 9, 2018: contributor

@MarcoFalke @DrahtBot fetch the wrong commit.

MarcoFalke deleted a comment on Aug 9, 2018

MarcoFalke added the label Needs gitian build on Aug 9, 2018

DrahtBot removed the label Needs gitian build on Aug 10, 2018

laanwj commented at 4:20 pm on August 15, 2018: member

What is the reason this is still WIP? would like to merge this early in the 0.18 cycle if possible. (going to test)

ken2812221 commented at 4:31 pm on August 15, 2018: contributor

@laanwj You can see @DrahtBot ’s binary, it exports so many unnecessary symbols

laanwj commented at 8:50 am on August 16, 2018: member

I’m not sure how worried we should be about exporting unnecessary symbols on RISC-V at this point, from what I gather everything is still extremely experimental, there aren’t even ready-to-use linux distribution images.

The “don’t export unnecessary symbols” check was, at the time, added to avoid collisions between statically-linked and dynamically-linked OpenSSL, back in the day that Qt was still linked dynamically. This is no longer an actual issue. Now it’s only a “nice” sanity and hygiene check, to avoid the overhead of huge unnecessary symbol tables in an executable.

So I don’t think that needs to hold back progress, seems like be something that is improved in a later PR, but I’ll leave it up to you.

ken2812221 renamed this:
~~[WIP][build] Add risc-v support to gitian~~
[build] Add risc-v support to gitian
on Aug 16, 2018

ken2812221 commented at 10:52 am on August 16, 2018: contributor

@laanwj Thanks for clarification. The export symbol things can be done in future PR. At least I can’t solve the problem for now, leave for someone who can work on improving this.

MarcoFalke added the label Needs gitian build on Aug 16, 2018

laanwj commented at 6:32 pm on August 16, 2018: member

ACK c4aecd1d8 gitian build result tested on actual hardware (HiFive Unleashed=U540) w/ Fedora release 29 (Rawhide):

0# ./test_bitcoin 
1Running 303 test cases...
2test/scheduler_tests.cpp(141): info: counter2++
3test/scheduler_tests.cpp(141): info: counter2++
4test/scheduler_tests.cpp(145): info:  == 
5test/scheduler_tests.cpp(145): info: i          
6*** No errors detected

Also synced the beginning of the chain, I’ll keep this node running.

Going to merge this because I want to keep building for RISC-V on the 0.18 branch. If any issues come up we can revert this before the 0.18.0 release.

ken2812221 referenced this in commit 3c8d1ae153 on Aug 16, 2018

laanwj merged this on Aug 16, 2018

laanwj closed this on Aug 16, 2018

ken2812221 deleted the branch on Aug 16, 2018

MarcoFalke removed the label Needs gitian build on Aug 17, 2018

laanwj commented at 5:36 am on August 23, 2018: member

Also synced the beginning of the chain, I’ll keep this node running.

This was successful! Synchronization of the full chain on the HiFive Unleashed board to a nbd partition took about 2-3 days. (had to restart at some point as there were problems with the SD card interface or driver, but there were zero issues with bitcoind)

MarcoFalke deleted a comment on Aug 23, 2018

Munkybooty referenced this in commit ca1010210a on Sep 8, 2021

MarcoFalke locked this on Sep 8, 2021

[build] Add risc-v support to gitian #13665