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mdbx-doc: add note for Reproducible builds.

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More for https://github.com/erthink/libmdbx/issues/201
This commit is contained in:
Leonid Yuriev 2021-06-02 17:08:40 +03:00
parent f951f246b8
commit 0e83a8e5ef
2 changed files with 17 additions and 1 deletions
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4
ChangeLog.md
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@ -17,6 +17,10 @@ ChangeLog
- Finalize C++ API (few typos and trivia bugs are still likely for now).
- Packages for [Astra Linux](https://astralinux.ru/), [ALT Linux](https://www.altlinux.org/), [ROSA Linux](https://www.rosalinux.ru/), etc.
Acknowledgements:
- [Alex Sharov](https://github.com/AskAlexSharov) for reporting and testing.
New features:
- Allow to predefine/override `MDBX_BUILD_TIMESTAMP` for builds reproducibility (https://github.com/erthink/libmdbx/issues/201).

14
README.md
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@ -387,6 +387,18 @@ So just using CMake or GNU Make in your habitual manner and feel free to
fill an issue or make pull request in the case something will be
unexpected or broken down.
### Common important details
#### Build reproducibility
By default _libmdbx_ track build time via `MDBX_BUILD_TIMESTAMP` build option and macro.
So for a [reproducible builds](https://en.wikipedia.org/wiki/Reproducible_builds) you should predefine/override it to known fixed string value. For instance:
- for reproducible build with make: `make MDBX_BUILD_TIMESTAMP=unknown ` ...
- or during configure by CMake: `cmake -DMDBX_BUILD_TIMESTAMP:STRING=unknown ` ...
Of course, in addition to this, your toolchain must ensure the reproducibility of builds.
For more information please refer to [reproducible-builds.org](https://reproducible-builds.org/).
#### DSO/DLL unloading and destructors of Thread-Local-Storage objects
When building _libmdbx_ as a shared library or use static _libmdbx_ as a
part of another dynamic library, it is advisable to make sure that your
@ -479,7 +491,7 @@ Please refer to the [official guide](https://developer.android.com/studio/projec
### iOS
To build _libmdbx_ for iOS, we recommend using CMake with the
"[toolchain file](https://cmake.org/cmake/help/latest/variable/CMAKE_TOOLCHAIN_FILE.html)"
["toolchain file"](https://cmake.org/cmake/help/latest/variable/CMAKE_TOOLCHAIN_FILE.html)
from the [ios-cmake](https://github.com/leetal/ios-cmake) project.
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