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130 lines
3.0 KiB
130 lines
3.0 KiB
4 months ago
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# flex and bison binaries
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This folder contains the flex and bison binaries. We use these binaries to
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generate the ANGLE translator's lexer and parser.
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Use the script [`update_flex_bison_binaries.py`](update_flex_bison_binaries.py)
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to update the versions of these binaries in cloud storage. It must be run on
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Linux or Windows. It will update the SHAs for your platform. After running the
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script run `git commit` and then `git cl upload` to code review using the normal
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review process. You will also want to run
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[`scripts/run_code_generation.py`](../../scripts/run_code_generation.py) to
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update the generated files.
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Please update both Windows and Linux binaries at the same time. Use two CLs. One
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for each platform. Note that we don't currently support Mac for generating the
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lexer and parser files. If we do we should add a flex/bison download for Mac as
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well.
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Contact jmadill or syoussefi for any help with updating the binaries.
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## Updating flex and bison binaries
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This is expected to be a rare operation, and is currently done based on the
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following instructions. Note: get the binaries first on windows, as only a
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single option is available, then build the binaries for the same version on
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Linux.
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### On Windows
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Install MSys2 (x86_64) from http://www.msys2.org/ on Windows. `flex` should
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already be installed. Install bison:
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```
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$ pacman -S bison
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```
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Note the versions of flex and bison so the same versions can be build on Linux.
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For example:
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```
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$ flex --version
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flex 2.6.4
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$ bison --version
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bison (GNU Bison) 3.3.2
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```
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The only dependencies from MSys2 should be the following:
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```
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msys-intl-8.dll
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msys-iconv-2.dll
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msys-2.0.dll
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```
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This can be verified with:
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```
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$ ldd /usr/bin/flex
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$ ldd /usr/bin/bison
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```
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Additionally, we need the binary for m4 at `/usr/bin/m4`.
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Copy all these 5 files to this directory:
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```
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$ cd angle/
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$ cp /usr/bin/flex.exe \
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/usr/bin/bison.exe \
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/usr/bin/m4.exe \
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/usr/bin/msys-intl-8.dll \
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/usr/bin/msys-iconv-2.dll \
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/usr/bin/msys-2.0.dll \
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tools/flex-bison/windows/
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```
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Upload the binaries:
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```
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$ cd angle/
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$ python tools/flex-bison/update_flex_bison_binaries.py
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```
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### On Linux
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```
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# Get the source of flex
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$ git clone https://github.com/westes/flex.git
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$ cd flex/
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# Checkout the same version as msys2 on windows
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$ git checkout v2.6.4
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# Build
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$ autoreconf -i
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$ mkdir build && cd build
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$ ../configure CFLAGS="-O2 -D_GNU_SOURCE"
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$ make -j
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```
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```
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# Get the source of bison
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$ curl http://ftp.gnu.org/gnu/bison/bison-3.3.2.tar.xz | tar -xJ
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$ cd bison-3.3.2
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# Build
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$ mkdir build && cd build
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$ ../configure CFLAGS="-O2"
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$ make -j
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```
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Note: Bison's [home page][Bison] lists ftp server and other mirrors. If the
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above link is broken, replace with a mirror.
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Copy the 2 executables to this directory:
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```
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$ cd angle/
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$ cp /path/to/flex/build/src/flex \
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/path/to/bison/build/src/bison \
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tools/flex-bison/linux/
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```
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Upload the binaries:
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```
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$ cd angle/
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$ python tools/flex-bison/update_flex_bison_binaries.py
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```
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[Bison]: https://www.gnu.org/software/bison/
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