Avoid broken meson version 0.53.0 on Python 3.5.2
Meson 0.53.0 broke compatibility with Python 3.5.2
Error message with meson 0.53.0 in our Ubuntu 16.04/Python 3.5.2 CI
environment:
```
meson -Dtarget=sim-verilator -Dot_version=opentitan-snapshot-20191101-1-434-gb99db7f -Ddev_bin_dir=/home/vsts/work/1/a/build-bin/sw/device/sim-verilator -Dhost_bin_dir=/home/vsts/work/1/a/build-bin/sw/host --cross-file=/tmp/toolchain.dhA3HP.txt /home/vsts/work/1/a/build-out/sw/sim-verilator
Traceback (most recent call last):
File "/usr/local/bin/meson", line 11, in <module>
load_entry_point('meson==0.53.0', 'console_scripts', 'meson')()
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 489, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 2852, in load_entry_point
return ep.load()
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 2443, in load
return self.resolve()
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 2449, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "/usr/local/lib/python3.5/dist-packages/mesonbuild/mesonmain.py", line 25, in <module>
from . import mconf, mdist, minit, minstall, mintro, msetup, mtest, rewriter, msubprojects, munstable_coredata
File "/usr/local/lib/python3.5/dist-packages/mesonbuild/mconf.py", line 16, in <module>
from . import coredata, environment, mesonlib, build, mintro, mlog
File "/usr/local/lib/python3.5/dist-packages/mesonbuild/environment.py", line 32, in <module>
from . import compilers
File "/usr/local/lib/python3.5/dist-packages/mesonbuild/compilers/__init__.py", line 102, in <module>
from .compilers import (
File "/usr/local/lib/python3.5/dist-packages/mesonbuild/compilers/compilers.py", line 389, in <module>
class CompilerArgs(typing.MutableSequence[str]):
File "/usr/local/lib/python3.5/dist-packages/mesonbuild/compilers/compilers.py", line 658, in CompilerArgs
def __eq__(self, other: typing.Any) -> typing.Union[bool, 'NotImplemented']:
"Forward references must evaluate to types.")
File "/usr/lib/python3.5/typing.py", line 312, in _type_check
raise TypeError(msg + " Got %.100r." % (arg,))
TypeError: Forward references must evaluate to types. Got NotImplemented.
```
Works around #1288 for now.
Reported upstream at https://github.com/mesonbuild/meson/issues/6427
Signed-off-by: Philipp Wagner <phw@lowrisc.org>
diff --git a/python-requirements.txt b/python-requirements.txt
index 3d1b52a..9d94f60 100644
--- a/python-requirements.txt
+++ b/python-requirements.txt
@@ -9,7 +9,9 @@
isort
livereload
mako
-meson >= 0.51.0 # Matches version in meson.build
+# Meson 0.53.0 broke compatibility with Python 3.5.2, see
+# https://github.com/lowRISC/opentitan/issues/1288 for details.
+meson >= 0.51.0, < 0.53.0 # minimum matches version in meson.build
mistletoe>=0.7.2
pyftdi
pygments
