mirror of
https://github.com/lucannez64/darling-lol.git
synced 2026-10-26 19:47:42 +00:00
39 lines
2.4 KiB
Python
39 lines
2.4 KiB
Python
#!/usr/bin/env python3
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"""Rebuild libc++abi and libc++ with -O3. The CMake tree has no build type, so the stock objects (and the earlier
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single-file libc++abi rebuild) are -O0: std::type_info::operator==, __dynamic_cast, shared_ptr internals ran 3-5x slower
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than they should (about 2% of the League main thread). Outputs build/riot-opt-libc++abi.dylib / riot-opt-libc++.1.dylib.
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"""
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from concurrent.futures import ThreadPoolExecutor
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from pathlib import Path
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import os, re, shlex, subprocess, sys
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root = Path(__file__).resolve().parent.parent
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resource_dir = subprocess.check_output(['clang', '-print-resource-dir'], text=True).strip()
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def current_clang(values):
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return [re.sub(r'/usr/lib/clang/\d+/include', resource_dir + '/include', v) for v in values]
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def build(lib, objdir, linkdir, output):
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folder = root / 'build/darling-src/build/src/external' / lib
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src = root / 'build/darling-src/src/external' / lib
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flags = {}
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for line in (folder / ('CMakeFiles/%s/flags.make' % objdir)).read_text().splitlines():
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if line.startswith('CXX_') and ' = ' in line:
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k, v = line.split(' = ', 1); flags[k] = current_clang(shlex.split(v))
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link = shlex.split((folder / ('CMakeFiles/%s/link.txt' % linkdir)).read_text())
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jobs = []
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for i, arg in enumerate(link):
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if arg.startswith('CMakeFiles/%s/' % objdir) and arg.endswith('.o'):
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rel = arg[len('CMakeFiles/%s/' % objdir):-2] # e.g. src/algorithm.cpp
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obj = root / ('build/riot-opt-%s-%s.o' % (lib, rel.replace('/', '_')))
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jobs.append((rel, obj)); link[i] = str(obj)
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def compile_one(job):
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rel, obj = job
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subprocess.run(['clang++', *flags['CXX_DEFINES'], *flags['CXX_INCLUDES'], *flags['CXX_FLAGS'], '-O3', '-march=native', '-mtune=native', '-fomit-frame-pointer', '-DNDEBUG',
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'-c', str(src / rel), '-o', str(obj)], check=True)
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with ThreadPoolExecutor(max_workers=os.cpu_count() or 8) as pool:
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list(pool.map(compile_one, jobs))
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link[link.index('-o') + 1] = str(root / 'build' / output)
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subprocess.run(link, cwd=folder, check=True)
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print('built', output, len(jobs), 'objects')
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targets = sys.argv[1:] or ['abi', 'cxx']
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if 'abi' in targets: build('libcxxabi', 'cxxabi_obj.dir', 'cxxabi.dir', 'riot-opt-libc++abi.dylib')
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if 'cxx' in targets: build('libcxx', 'cxx_obj.dir', 'cxx.dir', 'riot-opt-libc++.1.dylib')
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