52aab0e4b4
Previously, we would be passing down -stdlib=libc++ from the Driver to CC1 whenever the default standard library on the platform was libc++, even if -stdlib= had not been passed to the Driver. This meant that we would pass -stdlib=libc++ in nonsensical circumstances, such as when compiling C code. This logic had been added in b534ce46bd40 to make sure that header search paths were set up properly. However, since libc++ is now the default Standard Library on Darwin, passing this explicitly is not required anymore. Indeed, if no -stdlib= is specified, CC1 will end up using libc++ if it queries which standard library to use, without having to be told. Not passing -stdlib= at all to CC1 on Darwin should become possible once CC1 stops relying on it to set up framework search paths. Furthermore, this commit also removes a diagnostic checking whether the deployment target is too old to support libc++. Nowadays, all supported deployment targets use libc++ and compiling with libstdc++ is not supported anymore. The Driver was the wrong place to issue this diagnostic since it doesn't know whether libc++ will actually be linked against (e.g. C vs C++), which would lead to spurious diagnostics. Given that these targets are not supported anymore, we simply drop the diagnostic instead of trying to refactor it into CC1. This is a re-application of 6540f32db09c which had been reverted in 49dd02bd0819 because it broke a compiler-rt test. The test had broken because we were compiling C code and passing -stdlib=libc++, which Clang will now warn about. rdar://103198514 Differential Revision: https://reviews.llvm.org/D139938
113 lines
5.0 KiB
Python
113 lines
5.0 KiB
Python
# -*- Python -*-
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import os
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def get_required_attr(config, attr_name):
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attr_value = getattr(config, attr_name, None)
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if attr_value == None:
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lit_config.fatal(
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"No attribute %r in test configuration! You may need to run "
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"tests from your build directory or add this attribute "
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"to lit.site.cfg.py " % attr_name)
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return attr_value
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# Setup config name.
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config.name = 'Profile-' + config.target_arch
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# Setup source root.
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config.test_source_root = os.path.dirname(__file__)
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# Setup executable root.
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if hasattr(config, 'profile_lit_binary_dir') and \
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config.profile_lit_binary_dir is not None:
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config.test_exec_root = os.path.join(config.profile_lit_binary_dir, config.name)
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if config.host_os in ['Linux']:
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extra_link_flags = ["-ldl"]
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elif config.host_os in ['Windows']:
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# InstrProf is incompatible with incremental linking. Disable it as a
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# workaround.
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extra_link_flags = ["-Wl,-incremental:no"]
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else:
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extra_link_flags = []
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# Test suffixes.
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config.suffixes = ['.c', '.cpp', '.m', '.mm', '.ll', '.test']
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# What to exclude.
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config.excludes = ['Inputs']
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# Clang flags.
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target_cflags=[get_required_attr(config, "target_cflags")]
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clang_cflags = target_cflags + extra_link_flags
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clang_cxxflags = config.cxx_mode_flags + clang_cflags
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# TODO: target_cflags can sometimes contain C++ only flags like -stdlib=<FOO>, which are
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# ignored when compiling as C code. Passing this flag when compiling as C results in
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# warnings that break tests that use -Werror.
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# We remove -stdlib= from the cflags here to avoid problems, but the interaction between
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# CMake and compiler-rt's tests should be reworked so that cflags don't contain C++ only
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# flags.
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clang_cflags = [flag.replace('-stdlib=libc++', '').replace('-stdlib=libstdc++', '') for flag in clang_cflags]
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def build_invocation(compile_flags, with_lto = False):
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lto_flags = []
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if with_lto and config.lto_supported:
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lto_flags += config.lto_flags
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return " " + " ".join([config.clang] + lto_flags + compile_flags) + " "
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def exclude_unsupported_files_for_aix(dirname):
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for filename in os.listdir(dirname):
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source_path = os.path.join( dirname, filename)
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if os.path.isdir(source_path):
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continue
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f = open(source_path, 'r')
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try:
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data = f.read()
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# -fprofile-instr-generate and rpath are not supported on AIX, exclude all tests with them.
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if ("%clang_profgen" in data or "%clangxx_profgen" in data or "-rpath" in data):
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config.excludes += [ filename ]
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finally:
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f.close()
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# Add clang substitutions.
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config.substitutions.append( ("%clang ", build_invocation(clang_cflags)) )
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config.substitutions.append( ("%clangxx ", build_invocation(clang_cxxflags)) )
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config.substitutions.append( ("%clang_profgen ", build_invocation(clang_cflags) + " -fprofile-instr-generate ") )
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config.substitutions.append( ("%clang_profgen=", build_invocation(clang_cflags) + " -fprofile-instr-generate=") )
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config.substitutions.append( ("%clangxx_profgen ", build_invocation(clang_cxxflags) + " -fprofile-instr-generate ") )
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config.substitutions.append( ("%clangxx_profgen=", build_invocation(clang_cxxflags) + " -fprofile-instr-generate=") )
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config.substitutions.append( ("%clang_pgogen ", build_invocation(clang_cflags) + " -fprofile-generate ") )
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config.substitutions.append( ("%clang_pgogen=", build_invocation(clang_cflags) + " -fprofile-generate=") )
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config.substitutions.append( ("%clangxx_pgogen ", build_invocation(clang_cxxflags) + " -fprofile-generate ") )
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config.substitutions.append( ("%clangxx_pgogen=", build_invocation(clang_cxxflags) + " -fprofile-generate=") )
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config.substitutions.append( ("%clang_cspgogen ", build_invocation(clang_cflags) + " -fcs-profile-generate ") )
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config.substitutions.append( ("%clang_cspgogen=", build_invocation(clang_cflags) + " -fcs-profile-generate=") )
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config.substitutions.append( ("%clangxx_cspgogen ", build_invocation(clang_cxxflags) + " -fcs-profile-generate ") )
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config.substitutions.append( ("%clangxx_cspgogen=", build_invocation(clang_cxxflags) + " -fcs-profile-generate=") )
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config.substitutions.append( ("%clang_profuse=", build_invocation(clang_cflags) + " -fprofile-instr-use=") )
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config.substitutions.append( ("%clangxx_profuse=", build_invocation(clang_cxxflags) + " -fprofile-instr-use=") )
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config.substitutions.append( ("%clang_pgouse=", build_invocation(clang_cflags) + " -fprofile-use=") )
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config.substitutions.append( ("%clangxx_profuse=", build_invocation(clang_cxxflags) + " -fprofile-instr-use=") )
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config.substitutions.append( ("%clang_lto_profgen=", build_invocation(clang_cflags, True) + " -fprofile-instr-generate=") )
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if config.host_os not in ['Windows', 'Darwin', 'FreeBSD', 'Linux', 'NetBSD', 'SunOS', 'AIX']:
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config.unsupported = True
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if config.host_os in ['AIX']:
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config.available_features.add('system-aix')
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exclude_unsupported_files_for_aix(config.test_source_root)
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exclude_unsupported_files_for_aix(config.test_source_root + "/Posix")
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if config.target_arch in ['armv7l']:
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config.unsupported = True
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if config.android:
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config.unsupported = True
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