41184c21df
Uses a conditional gclient variable "angle_mesa". You must set this to True in your .gclient to download and configure Mesa. After that you must also set angle_build_mesa=true in your GN args. We call through to meson in order to setup and build. Mesa sources and targets are written into an auto-generated GNI file. We must update this file on the same cadence as Mesa rolls. Because the version of libdrm we use in our sysroot is older than Mesa requires, this CL also includes a custom libdrm build. Also in order to run bison and flex on the old sysroot that Chrome infra runs with, this CL includes a new version of flex and bison that run without newer versions of GLIBC. Bug: angleproject:7689 Change-Id: I1aeeda1e6f3cf1d5f878aeab5209afa7e1fb5324 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3933062 Reviewed-by: Cody Northrop <cnorthrop@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org> |
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| .. | ||
| linux | ||
| third_party | ||
| windows | ||
| README.md | ||
| update_flex_bison_binaries.py | ||
README.md
flex and bison binaries
This folder contains the flex and bison binaries. We use these binaries to generate the ANGLE translator's lexer and parser.
Use the script update_flex_bison_binaries.py
to update the versions of these binaries in cloud storage. It must be run on
Linux or Windows. It will update the SHAs for your platform. After running the
script run git commit and then git cl upload to code review using the normal
review process. You will also want to run
scripts/run_code_generation.py to
update the generated files.
Please update both Windows and Linux binaries at the same time. Start with Windows, then merge your work into a single CL that updates both binaries simultaneously. Note that we don't currently support Mac for generating the lexer and parser files. If we do we should add a flex/bison download for Mac as well.
Contact jmadill or syoussefi for any help with updating the binaries.
Updating flex and bison binaries
This is expected to be a rare operation, and is currently done based on the following instructions. Note: get the binaries first on windows, as only a single option is available, then build the binaries for the same version on Linux.
On Windows
Install MSys2 (x86_64) from http://www.msys2.org/ on Windows. flex should
already be installed. Install bison:
$ pacman -S bison
Note the versions of flex and bison, so you can build the exact same versions on Linux. For example:
$ flex --version
flex 2.6.4
$ bison --version
bison (GNU Bison) 3.8.2
The only dependencies outside /Windows/ from MSys2 should be the following:
msys-intl-8.dll
msys-iconv-2.dll
msys-2.0.dll
This can be verified with:
$ ldd /usr/bin/flex
$ ldd /usr/bin/bison
Additionally, we need the binary for m4 at /usr/bin/m4.
Copy all these 5 files to this directory:
$ cd angle/
$ cp /usr/bin/flex.exe \
/usr/bin/bison.exe \
/usr/bin/m4.exe \
/usr/bin/msys-intl-8.dll \
/usr/bin/msys-iconv-2.dll \
/usr/bin/msys-2.0.dll \
tools/flex-bison/windows/
Upload the binaries:
$ cd angle/
$ py tools/flex-bison/update_flex_bison_binaries.py
On Linux
# Get the source of flex
$ git clone https://github.com/westes/flex.git
$ cd flex/
# Checkout the same version as msys2 on windows
$ git checkout v2.6.4
# Build
$ autoreconf -i
$ mkdir build && cd build
$ ../configure CFLAGS="-O2 -D_GNU_SOURCE"
$ make -j
# Get the source of bison
$ curl http://ftp.gnu.org/gnu/bison/bison-3.8.2.tar.xz | tar -xJ
$ cd bison-3.8.2
# Build
$ mkdir build && cd build
$ ../configure CFLAGS="-O2"
$ make -j
Note: Bison's home page lists ftp server and other mirrors. If the above link is broken, replace with a mirror.
Copy the 2 executables to this directory:
$ cd angle/
$ cp /path/to/flex/build/src/flex \
/path/to/bison/build/src/bison \
tools/flex-bison/linux/
Upload the binaries:
$ cd angle/
$ ./tools/flex-bison/update_flex_bison_binaries.py