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Switch default backend from 'fastcomp' to 'upstream' (#373)

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When users as for 'latest' or just '1.39.0' we now default to the
upstream llvm backend.

For versions before 1.39.0 we continue to default to fastcomp.

Fixes: https://github.com/emscripten-core/emscripten/issues/5488
This commit is contained in:
Sam Clegg
2019-10-21 14:23:29 -07:00
committed by GitHub
parent e047fe4c1e
commit ae5044e779
2 changed files with 41 additions and 22 deletions
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40
emsdk.py
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@@ -1941,7 +1941,7 @@ def find_used_python():
def version_key(ver):
return list(map(int, re.split('[._-]', ver)))
return tuple(map(int, re.split('[._-]', ver)))
# A sort function that is compatible with both Python 2 and Python 3 using a
@@ -2710,14 +2710,29 @@ def main():
releases_info = load_releases_info()['releases']
def report_upstream_by_default():
print('''\
** NOTICE **: The default SDK changed from `fastcomp` to `upstream`.
If you have problems, or wish to revert back to fastcomp for some other reason
you can add `-fastcomp` to explicitly install that fastcomp-based
SDK, .e.g ./emsdk install latest-fastcomp.
''', file=sys.stderr)
# Replace meta-packages with the real package names.
if cmd in ('update', 'install', 'activate'):
for i in range(2, len(sys.argv)):
arg = sys.argv[i]
if arg in ('latest', 'sdk-latest', 'latest-64bit', 'sdk-latest-64bit', 'latest-fastcomp', 'latest-releases-fastcomp'):
if arg in ('latest', 'sdk-latest', 'latest-64bit', 'sdk-latest-64bit'):
# This is effectly the default SDK
report_upstream_by_default()
sys.argv[i] = str(find_latest_releases_sdk('upstream'))
elif arg in ('latest-fastcomp', 'latest-releases-fastcomp'):
sys.argv[i] = str(find_latest_releases_sdk('fastcomp'))
elif arg in ('latest-upstream', 'latest-clang-upstream', 'latest-releases-upstream'):
sys.argv[i] = str(find_latest_releases_sdk('upstream'))
elif arg in ('tot', 'sdk-tot'):
report_upstream_by_default()
sys.argv[i] = str(find_tot_sdk('upstream'))
elif arg == 'tot-upstream':
sys.argv[i] = str(find_tot_sdk('upstream'))
elif arg in ('tot-fastcomp', 'sdk-nightly-latest'):
@@ -2728,17 +2743,23 @@ def main():
# x.y.z[-(upstream|fastcomp_])
# sdk-x.y.z[-(upstream|fastcomp_])-64bit
# TODO: support short notation for old builds too?
upstream = False
backend = None
if '-upstream' in arg:
arg = arg.replace('-upstream', '')
upstream = True
backend = 'upstream'
elif '-fastcomp' in arg:
arg = arg.replace('-fastcomp', '')
upstream = False
backend = 'fastcomp'
arg = arg.replace('sdk-', '').replace('-64bit', '').replace('tag-', '')
release_hash = releases_info.get(arg, None) or releases_info.get('sdk-' + arg + '-64bit')
if release_hash:
sys.argv[i] = 'sdk-releases-%s-%s-64bit' % ('upstream' if upstream else 'fastcomp', release_hash)
if backend is None:
if version_key(arg) >= (1, 39, 0):
report_upstream_by_default()
backend = 'upstream'
else:
backend = 'fastcomp'
sys.argv[i] = 'sdk-releases-%s-%s-64bit' % (backend, release_hash)
if cmd == 'list':
print('')
@@ -2747,12 +2768,12 @@ def main():
print('The *recommended* precompiled SDK download is %s (%s).' % (find_latest_releases_version(), find_latest_releases_hash()))
print()
print('To install/activate it, use one of:')
print(' latest [default (fastcomp) backend]')
print(' latest-upstream [upstream LLVM wasm backend]')
print(' latest [default (llvm) backend]')
print(' latest-fastcomp [legacy (fastcomp) backend]')
print('')
print('Those are equivalent to installing/activating the following:')
print(' %s' % find_latest_releases_version())
print(' %s-upstream' % find_latest_releases_version())
print(' %s-fastcomp' % find_latest_releases_version())
print('')
else:
print('Warning: your platform does not have precompiled SDKs available.')
@@ -2764,7 +2785,6 @@ def main():
releases_versions.reverse()
for ver in releases_versions:
print(' %s' % ver)
print(' %s-upstream' % ver)
print()
# Use array to work around the lack of being able to mutate from enclosing