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Update supported versions of compilers

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Alexander Kazakov 2019-11-21 17:30:36 +03:00 committed by GitHub
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dbms/tests/instructions/developer_instruction_en.md
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@ -109,13 +109,13 @@ However, these libraries are optional and ClickHouse can well be built without t
# C++ Compiler
Compilers GCC starting from version 7 and Clang version 7 or above are supported for building ClickHouse.
Compilers GCC starting from version 9 and Clang version 8 or above are supported for building ClickHouse.
Official Yandex builds currently use GCC because it generates machine code of slightly better performance (yielding a difference of up to several percent according to our benchmarks). And Clang is more convenient for development usually. Though, our continuous integration (CI) platform runs checks for about a dozen of build combinations.
To install GCC on Ubuntu run: `sudo apt install gcc g++`
Check the version of gcc: `gcc --version`. If it is below 7, then follow the instruction here: https://clickhouse.yandex/docs/en/development/build/#install-gcc-7.
Check the version of gcc: `gcc --version`. If it is below 9, then follow the instruction here: https://clickhouse.yandex/docs/en/development/build/#install-gcc-9.
To install GCC on Mac OS X run: `brew install gcc`.
@ -131,9 +131,9 @@ cd build
```
You can have several different directories (build_release, build_debug, etc.) for different types of build.
While inside the `build` directory, configure your build by running CMake. Before the first run you need to define environment variables that specify compiler (version 7 gcc compiler in this example).
While inside the `build` directory, configure your build by running CMake. Before the first run you need to define environment variables that specify compiler (version 9 gcc compiler in this example).
```
export CC=gcc-7 CXX=g++-7
export CC=gcc-9 CXX=g++-9
cmake ..
```
The `CC` variable specifies the compiler for C (short for C Compiler), and `CXX` variable instructs which C++ compiler is to be used for building.
@ -265,4 +265,4 @@ Testing will commence as soon as Yandex employees label your PR with a tag "can
The system will prepare ClickHouse binary builds for your pull request individually. To retrieve these builds click the "Details" link next to "ClickHouse build check" entry in the list of checks. There you will find direct links to the built .deb packages of ClickHouse which you can deploy even on your production servers (if you have no fear).
Most probably some of the builds will fail at first times. This is due to the fact that we check builds both with gcc as well as with clang, with almost all of existing warnings (always with the `-Werror` flag) enabled for clang. On that same page you can find all of the build logs so that you do not have to build ClickHouse in all of the possible ways.
Most probably some of the builds will fail at first times. This is due to the fact that we check builds both with gcc as well as with clang, with almost all of existing warnings (always with the `-Werror` flag) enabled for clang. On that same page you can find all of the build logs so that you do not have to build ClickHouse in all of the possible ways.