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fanquake 681b25e3cd
Merge bitcoin/bitcoin#23152: build: add --enable-lto configuration option 
68e5aafde3 build: add `--enable-lto` configuration option (fanquake)

Pull request description:

  It's been 5 years since using LTO was first suggested for use when building Bitcoin Core, and it's time to revisit it again. Compilers, and their LTO implementations, have matured, and Bitcoin Core has come a long way in terms of pruning dependencies which may have proved troublesome (i.e Boost previously had issues when using LTO). We'll have even less Boost code after moving to `std::filesystem` (#20744).

  Experimenting with LTO came up on IRC last night:
  > sipa: jamesob: i'm interested in knowing whether "-flto" and/or "-fdata-sections -ffunction-sections -Wl,--gc-sections" are possible/beneficial with our current compiler suite; what would be a good way to have your test infrastructure benchmark things?

  So this PR just adds the bare minimum to make it easier to configure, compile and perform some bench-marking using `-flto`. This PR doesn't do anything depends wise, however if we decide this is what we want to do, I'll expand the changes here.

  I had previously had a PR open (#18605) to perform link time garbage collection (`-ffunction-sections -fdata-sections` & `-Wl,--gc-sections`), however moving straight to using LTO would be preferable.

  Note that our minimum required set of compilers, GCC 8.1 and Clang 7, all support the `-flto` option.

  Related #18579.
  Previous discussion: #10616, #14277.
  Previous related PRs: #10800 (`-flto`), #16791 (ThinLTO).

  Guix build:
  ```bash
  bash-5.1# find guix-build-$(git rev-parse --short=12 HEAD)/output/ -type f -print0 | env LC_ALL=C sort -z | xargs -r0 sha256sum
  1f3a7c5be4169aaa444b481d3e65a7bb72da9007fee6e6c416ded2e70f97374b  guix-build-68e5aafde3e8/output/aarch64-linux-gnu/SHA256SUMS.part
  fa8f4cf223d9aaf0b2c1ef55ce61256a19cd1ad7f42b99d0b98c9a52fe6ad8ba  guix-build-68e5aafde3e8/output/aarch64-linux-gnu/bitcoin-68e5aafde3e8-aarch64-linux-gnu-debug.tar.gz
  9a9967078cd1849b4e85db619e1f55d305c6d44e9e013067c0e8d62c1ba54087  guix-build-68e5aafde3e8/output/aarch64-linux-gnu/bitcoin-68e5aafde3e8-aarch64-linux-gnu.tar.gz
  18c71f30722102baaf3dfda67f7c7aac38723510b142e8df8ee7063c5d499368  guix-build-68e5aafde3e8/output/arm-linux-gnueabihf/SHA256SUMS.part
  0854cc0d17c045a118df2a24e4cf36d727e7e7e2dea37c2492ee21b71cb79b4b  guix-build-68e5aafde3e8/output/arm-linux-gnueabihf/bitcoin-68e5aafde3e8-arm-linux-gnueabihf-debug.tar.gz
  215256897dde4e8412ed60473376c694a80c5479fb08039107fb62435f2816ef  guix-build-68e5aafde3e8/output/arm-linux-gnueabihf/bitcoin-68e5aafde3e8-arm-linux-gnueabihf.tar.gz
  5fad0d9d12bc514ec46ed5d66fd29b7da1376a4a69c3b692936f1ab2356e2f85  guix-build-68e5aafde3e8/output/dist-archive/bitcoin-68e5aafde3e8.tar.gz
  4f32989d4ab1946048ca7caee9a983fa875be262282562f5a3e040f4bf92158e  guix-build-68e5aafde3e8/output/powerpc64-linux-gnu/SHA256SUMS.part
  ae45df309ae8ada52891efac0a369a69fed4ab93847a7bc4150a62230df4c8d7  guix-build-68e5aafde3e8/output/powerpc64-linux-gnu/bitcoin-68e5aafde3e8-powerpc64-linux-gnu-debug.tar.gz
  0ced227de15cb578567131271e2effe80681b4d7a436c92bf1caec735a576fa4  guix-build-68e5aafde3e8/output/powerpc64-linux-gnu/bitcoin-68e5aafde3e8-powerpc64-linux-gnu.tar.gz
  26fc5d2ccc1bc17ee0a146cacada6f4909d90c136ae640c8337332adce414ee0  guix-build-68e5aafde3e8/output/powerpc64le-linux-gnu/SHA256SUMS.part
  9956b544d90a62a8ba9fc9dc6b6b7f0efe193357332ec19e88053a89d4aab37e  guix-build-68e5aafde3e8/output/powerpc64le-linux-gnu/bitcoin-68e5aafde3e8-powerpc64le-linux-gnu-debug.tar.gz
  be8e39ceea1d36086ce5fa93bfb138c68d3bdf0dd6950b192dfa27a65cce3836  guix-build-68e5aafde3e8/output/powerpc64le-linux-gnu/bitcoin-68e5aafde3e8-powerpc64le-linux-gnu.tar.gz
  a7755edc394972885c4c77a7798007e5ba4126b177c4ff6224275c4fb8f3b1c4  guix-build-68e5aafde3e8/output/riscv64-linux-gnu/SHA256SUMS.part
  b6d252993d8aae7582ad6385fe53c61c54c284c68ece6cb2b2d1ac9554e06139  guix-build-68e5aafde3e8/output/riscv64-linux-gnu/bitcoin-68e5aafde3e8-riscv64-linux-gnu-debug.tar.gz
  bb4860f3bbd815f800333124ff901d880741792ab47097f49bda3a6931144da0  guix-build-68e5aafde3e8/output/riscv64-linux-gnu/bitcoin-68e5aafde3e8-riscv64-linux-gnu.tar.gz
  3dd17deed5c5935fb28b62dfc7afca5caab0d67862cdcbf3337edae73e1d0c4c  guix-build-68e5aafde3e8/output/x86_64-apple-darwin19/SHA256SUMS.part
  fa2d68c54fda0816188c81ce2201a77340b82645da2ffe412526f92c297a82df  guix-build-68e5aafde3e8/output/x86_64-apple-darwin19/bitcoin-68e5aafde3e8-osx-unsigned.dmg
  f6e5accdcd201f522b6426e4d8cc9b3643d4d43a57d268fa0e79ea9a34cfac01  guix-build-68e5aafde3e8/output/x86_64-apple-darwin19/bitcoin-68e5aafde3e8-osx-unsigned.tar.gz
  4e5a127df957d1c73b65925d685f6620e7bc5667efcb6dcd98be76effc22fc12  guix-build-68e5aafde3e8/output/x86_64-apple-darwin19/bitcoin-68e5aafde3e8-osx64.tar.gz
  56ccd216a69acafacbdc6bae0bdcc1faa50b6a51be1aebfa7068206c88b3241a  guix-build-68e5aafde3e8/output/x86_64-linux-gnu/SHA256SUMS.part
  77b93dd5fad322636853e5b0244ffafd97cc97f3b4b4ee755d5f830b75d77d13  guix-build-68e5aafde3e8/output/x86_64-linux-gnu/bitcoin-68e5aafde3e8-x86_64-linux-gnu-debug.tar.gz
  1feda932fc127b900316a232432b91e46e57ee12a81e12a7d888fdc3296219c1  guix-build-68e5aafde3e8/output/x86_64-linux-gnu/bitcoin-68e5aafde3e8-x86_64-linux-gnu.tar.gz
  aa7c53ab4164b3736049065c3c24391fc5bd7f26b4bda4aa877c378f0636a125  guix-build-68e5aafde3e8/output/x86_64-w64-mingw32/SHA256SUMS.part
  5e76148e67aef7e91e70074bfadc08e94373449ac3b966f4343b04d230c778fd  guix-build-68e5aafde3e8/output/x86_64-w64-mingw32/bitcoin-68e5aafde3e8-win-unsigned.tar.gz
  34123e3d818beeb70113caeda66945bc7cb9d9e987515d5b149bd17b4b38da90  guix-build-68e5aafde3e8/output/x86_64-w64-mingw32/bitcoin-68e5aafde3e8-win64-debug.zip
  2bba7f40a2b23c6ea3d47c4f564ab54201bf27f7f57103a98cc9bceea4e70c4d  guix-build-68e5aafde3e8/output/x86_64-w64-mingw32/bitcoin-68e5aafde3e8-win64-setup-unsigned.exe
  0e7e124144af4a92a4344cf70a3b7c06fbd2b8782aee7ede7263893afa3a5ef0  guix-build-68e5aafde3e8/output/x86_64-w64-mingw32/bitcoin-68e5aafde3e8-win64.zip
  ```

ACKs for top commit:
  laanwj:
    Code review ACK 68e5aafde3

Tree-SHA512: 5c25249cc178b9d54159e268390c974b739df9458d773e23c14b14d808f87f7afe314058b3c068601a9132042321973b0c9b6f81becb925665eca2738ae9a613
2021-11-25 20:15:00 +08:00
.github doc: Remove label from good first issue template 2020-08-24 09:31:24 +02:00
.tx qt: Bump transifex slug for 22.x 2021-04-21 13:46:41 +02:00
build-aux/m4 build: consistently quote AC_MSG_* arguments 2021-11-12 14:31:59 +08:00
build_msvc doc: Fix typos in endif header comments 2021-11-16 09:56:45 +01:00
ci Merge bitcoin/bitcoin#23504: ci: Replace soon EOL hirsute with jammy 2021-11-16 16:11:13 +08:00
contrib scripts: test for PE control flow instrumentation 2021-11-17 16:12:47 +08:00
depends Revert "doc: Install Rosetta on M1-macOS for qt in depends" 2021-11-25 09:35:25 +02:00
doc Merge bitcoin/bitcoin#23249: util: ParseByteUnits - Parse a string with suffix unit 2021-11-24 10:49:13 +01:00
share test: Enable SC2086 shellcheck rule 2021-11-13 16:54:56 +02:00
src Merge bitcoin/bitcoin#23152: build: add --enable-lto configuration option 2021-11-25 20:15:00 +08:00
test Merge bitcoin/bitcoin#23538: Remove strtol in torcontrol 2021-11-25 11:39:54 +01:00
.cirrus.yml build: don't check for deprecated berkeley-db4 package 2021-11-21 19:34:43 +08:00
.editorconfig ci: Drop AppVeyor CI integration 2021-09-07 06:12:53 +03:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore build: add *~ to .gitignore 2021-05-12 18:10:47 +02:00
.python-version Bump minimum python version to 3.6 2020-11-09 17:53:47 +10:00
.style.yapf test: .style.yapf: Set column_limit=160 2019-03-04 18:28:13 -05:00
autogen.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
configure.ac Merge bitcoin/bitcoin#23152: build: add --enable-lto configuration option 2021-11-25 20:15:00 +08:00
CONTRIBUTING.md Enable TLS in links in documentation 2021-09-16 22:00:20 +00:00
COPYING doc: Update license year range to 2021 2020-12-30 16:24:47 +01:00
INSTALL.md doc: Added hyperlink for doc/build 2021-09-09 19:53:12 +05:30
libbitcoinconsensus.pc.in build: remove libcrypto as internal dependency in libbitcoinconsensus.pc 2019-11-19 15:03:44 +01:00
Makefile.am Add minisketch dependency 2021-10-21 09:38:55 +08:00
README.md doc: Rework internal and external links 2021-02-17 09:18:46 +01:00
REVIEWERS release: remove gitian 2021-08-31 09:37:23 +08:00
SECURITY.md doc: Suggest keys.openpgp.org as keyserver in SECURITY.md 2021-11-08 12:22:04 +01:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

For an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/.

Further information about Bitcoin Core is available in the doc folder.

What is Bitcoin?

Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.

For more information read the original Bitcoin whitepaper.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built (see doc/build-*.md for instructions) and tested, but it is not guaranteed to be completely stable. Tags are created regularly from release branches to indicate new official, stable release versions of Bitcoin Core.

The https://github.com/bitcoin-core/gui repository is used exclusively for the development of the GUI. Its master branch is identical in all monotree repositories. Release branches and tags do not exist, so please do not fork that repository unless it is for development reasons.

The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The CI (Continuous Integration) systems make sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.