179504ccb6
530d02addbbuild: pass -fno-ident in Windows gitian descriptor (fanquake) Pull request description: `-fno-ident` prevents compilers from emitting compiler name and version number information that can needlessly bloat binaries. For example, in the `v0.19.0.1` Windows release binaries, there are > 1000 GCC compiler version strings embedded: ```bash # GCC: (GNU) 7.3-posix 20180312... & GCC: (GNU) 6.3.0 20170415....... strings bitcoind.exe | rg GCC | wc -l 1021 ``` They end up collected in the end of the`.rdata` section, and cannot be removed by `strip`. i.e: ```bash objdump --section=.rdata --full-contents bitcoind.exe ... cfcc00 00000000 00000000 00000000 00000000 ................ cfcc10 00000000 00000000 00000000 00000000 ................ cfcc20 4743433a 2028474e 55292036 2e332e30 GCC: (GNU) 6.3.0 cfcc30 20323031 37303431 35000000 00000000 20170415....... cfcc40 4743433a 2028474e 55292037 2e332d70 GCC: (GNU) 7.3-p cfcc50 6f736978 20323031 38303331 32000000 osix 20180312... cfcc60 4743433a 2028474e 55292037 2e332d70 GCC: (GNU) 7.3-p cfcc70 6f736978 20323031 38303331 32000000 osix 20180312... ``` The flag is available for [Clang](https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-qn) and [GCC](https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#index-fno-ident). Relevant code in [GCC](https://github.com/gcc-mirror/gcc/blob/master/gcc/toplev.c#L565-L578): ```c /* Attach a special .ident directive to the end of the file to identify the version of GCC which compiled this code. The format of the .ident string is patterned after the ones produced by native SVR4 compilers. */ if (!flag_no_ident) { const char *pkg_version = "(GNU) "; char *ident_str; if (strcmp ("(GCC) ", pkgversion_string)) pkg_version = pkgversion_string; ident_str = ACONCAT (("GCC: ", pkg_version, version_string, NULL)); targetm.asm_out.output_ident (ident_str); } ``` ACKs for top commit: practicalswift: ACK530d02addblaanwj: ACK530d02addbTree-SHA512: b3b28f43ec483dee28d1df8548fe72425bf00e750701825c256395f6aa7b23256eb27609b51779b86aed108b6eaa3912181a9d8282e23eebf9cee7784f9fabe0
Bitcoin Core integration/staging tree
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, as well as an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/, or read the original 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 and tested, but is not guaranteed to be
completely stable. Tags are created
regularly to indicate new official, stable release versions of Bitcoin Core.
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, that are run automatically on the build server.
These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py
The Travis CI system makes 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.
Translators should also subscribe to the mailing list.