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54 Commits
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fanquake
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87de9c8f5c |
Merge #17929: build: add linker optimisation flags to gitian & guix (Linux)
f2b5b0a3b48f9241971c14238040048f8b630811 build: add linker optimization flags to guix (fanquake) b8b050a8d642e38c81d1e451750c2c8db92fee5e build: add linker optimization flags to gitian descriptors (fanquake) Pull request description: This PR adds `-Wl,O2` to our gitian and guix LDFLAGS. This makes the linker perform certain optimisations (and is different from LTO). Any -O argument will enable optimizations in GNU ld. We can use -O2 here, as this matches our compile flags. Note that this would also enable additional optimizations if using the lld or gold linkers, when compared to -O0. A nice writeup + diagrams of some of these optimizations is available here: http://lwn.net/Articles/192624/. #### master ```bash # bitcoind Histogram for `.gnu.hash' bucket list length (total of 3 buckets) Length Number % of total Coverage 0 1 ( 33.3%) 0.0% 1 0 ( 0.0%) 0.0% 2 1 ( 33.3%) 40.0% 3 1 ( 33.3%) 100.0% ``` ```bash # bitcoin-qt Histogram for `.gnu.hash' bucket list length (total of 3 buckets) Length Number % of total Coverage 0 0 ( 0.0%) 0.0% 1 1 ( 33.3%) 10.0% 2 0 ( 0.0%) 10.0% 3 0 ( 0.0%) 10.0% 4 1 ( 33.3%) 50.0% 5 1 ( 33.3%) 100.0% ``` #### this PR: ```bash # bitcoind Histogram for `.gnu.hash' bucket list length (total of 8 buckets) Length Number % of total Coverage 0 3 ( 37.5%) 0.0% 1 5 ( 62.5%) 100.0% ``` ```bash # bitcoin-qt Histogram for `.gnu.hash' bucket list length (total of 19 buckets) Length Number % of total Coverage 0 9 ( 47.4%) 0.0% 1 10 ( 52.6%) 100.0% ``` #### GNU ld -O > If level is a numeric values greater than zero ld optimizes the output. This might take significantly longer and therefore probably should only be enabled for the final binary. At the moment this option only affects ELF shared library generation. Future releases of the linker may make more use of this option. Also currently there is no difference in the linker’s behaviour for different non-zero values of this option. Again this may change with future releases. #### lld -O > Optimize output file size ACKs for top commit: dongcarl: ACK f2b5b0a3b48f9241971c14238040048f8b630811 laanwj: ACK f2b5b0a3b48f9241971c14238040048f8b630811 Tree-SHA512: e53f3a4338317dbec65d3a93b57b5a6204aabdf9ac82d99447847a3c8627facc53c58c2cf947376f13edd979fc8129a80f18d9ebeccd191a576c83f1dad5c513 |
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fanquake
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dff599acff |
Merge #17595: guix: Enable building for x86_64-w64-mingw32 target
a35e3235891d35daa167116cc70340140e883f06 guix: Appease travis. (Carl Dong) 0b66d22da5f53640e22f05adf880782c613e6d0f guix: Use gcc-9 for mingw-w64 instead of 8 (Carl Dong) ba0b99bdd613ba7f17c6247ece3001e1b44759a3 guix: Don't set MINGW_HAS_SECURE_API CFLAG in depends (Carl Dong) 93439a71eda49fb69f1e82966a23a946733aa6fa guix: Bump to upstream commit with mingw-w64 changes (Carl Dong) 35a96792dda9e78165b1598aeac7b2ab759e7be5 guix: Check mingw symbols, improve SSP fix docs (Carl Dong) 449d8fe25bbe25daacfc67aa89ca32b0a3254c5a guix: Expand on INT trap message (Carl Dong) 3f1f03c67a8e9edf487f08d272adb18b0a3942c8 guix: Spelling fixes (Carl Dong) ff821dd2a1c600488d11e7d9a20e9179ecc9144b guix: Reinstate make-ssp-fixed-gcc (Carl Dong) 360a9e0ad50a36ec79a1a160dbed3966689fd41c guix: Bump time-machine for mingw-w64 patches (Carl Dong) 93e41b7e3b54c17fd1b4c61ee95fc0dc2827e954 guix: Use gcc-8 for mingw-w64 instead of 7 (Carl Dong) ef4f7e4c45c60a69406134122f091c77c6ef740f guix: Set the well-known timezone env var (Carl Dong) acf4b3b3b5accf60a19441a0298ef27001b78e72 guix: Make x86_64-w64-mingw32 builds reproducible (Carl Dong) c4cce00eac691625b78b92f7dba0b7f57def19e5 guix: Remove dead links from README. (Carl Dong) df953a4c9a6143f45864757b706c88b6fa70545a guix: Appease shellcheck. (Carl Dong) 91897c95e191d293eb27d8af15cbeafc5b8f3895 guix: Improve guix-build.sh documentation (Carl Dong) 570d769c6c59b9f6d1a2b95b2ed60432cb33b3ba guix: Build support for Windows (Carl Dong) Pull request description: ~~Based on: https://github.com/bitcoin/bitcoin/pull/16519~~ Based on: #17933 (Time Machines are... shall we say... superior 😁) This PR allows us to perform Guix builds for the `x86_64-w64-mingw32` target. We do this _without_ splitting up the build script like we do in Gitian by using this newfangled alien technology called `case` statements. (This is WIP and might be changed to `if` statements soon) ACKs for top commit: fanquake: ACK a35e3235891d35daa167116cc70340140e883f06 2/3 Tree-SHA512: c471951c23eb2cda919a71285d8b8f2580cb20f09d5db17b53e13dbd8813e01b3e7a83ea848e4913fd0f2bc12c6c133c5f76b54e65c0d89fed4dfd2e0be19875 |
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fanquake
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9eb0995a88 |
Merge #16810: guix: Remove ssp spec file hack
0065ead5ebdad9f743d89ee2558c93253a597967 contrib: guix: Remove ssp spec file hack (Carl Dong)
0093a5869a30797ccb139d0cb5a0427d3f3c2d94 contrib: guix: More robust search paths, add checks (Carl Dong)
Pull request description:
See commit messages for more details
ACKs for top commit:
fanquake:
ACK 0065ead5ebdad9f743d89ee2558c93253a597967
Tree-SHA512: fde04005fb31cd4b75b80da4936a7c394f63f0b3bdcc33c20c99e05604a63efd9c850a8d097030ff0bf4b4e83f1a9997fc4621ce291ebcecd8397893447600a7
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Wladimir J. van der Laan
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aec7441ac2 |
Merge #15277: contrib: Enable building in Guix containers
751549b52a9a4cd27389d807ae67f02bbb39cd7f contrib: guix: Additional clarifications re: substitutes (Carl Dong) cd3e947f50db7cfe05c05b368c25742193729a62 contrib: guix: Various improvements. (Carl Dong) 8dff3e48a9e03299468ed3b342642f01f70da9db contrib: guix: Clarify SOURCE_DATE_EPOCH. (Carl Dong) 3e80ec3ea9691c7c89173de922a113e643fe976b contrib: Add deterministic Guix builds. (Carl Dong) Pull request description: ~~**This post is kept updated as this project progresses. Use this [latest update link](https://github.com/bitcoin/bitcoin/pull/15277#issuecomment-497303718) to see what's new.**~~ Please read the `README.md`. ----- ### Guix Introduction This PR enables building bitcoin in Guix containers. [Guix](https://www.gnu.org/software/guix/manual/en/html_node/Features.html) is a transactional package manager much like Nix, but unlike Nix, it has more of a focus on [bootstrappability](https://www.gnu.org/software/guix/manual/en/html_node/Bootstrapping.html) and [reproducibility](https://www.gnu.org/software/guix/blog/tags/reproducible-builds/) which are attractive for security-sensitive projects like bitcoin. ### Guix Build Walkthrough Please read the `README.md`. [Old instructions no. 4](https://github.com/bitcoin/bitcoin/pull/15277#issuecomment-497303718) [Old instructions no. 3](https://github.com/bitcoin/bitcoin/pull/15277#issuecomment-493827011) [Old instructions no. 2](https://github.com/bitcoin/bitcoin/pull/15277#issuecomment-471658439) <details> <summary>Old instructions no. 1</summary> In this PR, we define a Guix [manifest](https://www.gnu.org/software/guix/manual/en/html_node/Invoking-guix-package.html#profile_002dmanifest) in `contrib/guix/manifest.scm`, which declares what packages we want in our environment. We can then invoke ``` guix environment --manifest=contrib/guix/manifest.scm --container --pure --no-grafts --no-substitutes ``` To have Guix: 1. Build an environment containing the packages we defined in our `contrib/guix/manifest.scm` manifest from the Guix bootstrap binaries (see [bootstrappability](https://www.gnu.org/software/guix/manual/en/html_node/Bootstrapping.html) for more details). 2. Start a container with that environment that has no network access, and no access to the host's filesystem except to the `pwd` that it was started in. 3. Drop you into a shell in that container. > Note: if you don't want to wait hours for Guix to build the entire world from scratch, you can eliminate the `--no-substitutes` option to have Guix download from available binary sources. Note that this convenience doesn't necessarily compromise your security, as you can check that a package was built correctly after the fact using `guix build --check <packagename>` Therefore, we can perform a build of bitcoin much like in Gitian by invoking the following: ``` make -C depends -j"$(nproc)" download && \ cat contrib/guix/build.sh | guix environment --manifest=contrib/guix/manifest.scm --container --pure --no-grafts --no-substitutes ``` We don't include `make -C depends -j"$(nproc)" download` inside `contrib/guix/build.sh` because `contrib/guix/build.sh` is run inside the container, which has no network access (which is a good thing). </details> ### Rationale I believe that this represents a substantial improvement for the "supply chain security" of bitcoin because: 1. We no longer have to rely on Ubuntu for our build environment for our releases ([oh the horror]( |