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d6e714b10e
Since we don't generate a full dependency graph of headers, we can greatly simplify the script that parses the result of --trace-includes. At the same time, we also unify the mechanism for detecting whether a header is a public/C compat/internal/etc header with the existing mechanism in header_information.py. As a drive-by this fixes the headers_in_modulemap.sh.py test which had been disabled by mistake because it used its own way of determining the list of libc++ headers. By consistently using header_information.py to get that information, problems like this shouldn't happen anymore. This should also unblock #110303, which was blocked because of a brittle implementation of the transitive includes check which broke when the repository was cloned at a path like /path/__something/more.
96 lines
3.1 KiB
Python
96 lines
3.1 KiB
Python
# ===----------------------------------------------------------------------===##
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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# ===----------------------------------------------------------------------===##
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import os.path
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import sys
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from libcxx.header_information import module_c_headers, module_headers, header_restrictions, headers_not_available, libcxx_root
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def write_file(module):
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with open(libcxx_root / "modules" / f"{module}.cppm.in", "w") as module_cpp_in:
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module_cpp_in.write(
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"""\
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// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// WARNING, this entire header is generated by
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// utils/generate_libcxx_cppm_in.py
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// DO NOT MODIFY!
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module;
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#include <__config>
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// The headers of Table 24: C++ library headers [tab:headers.cpp]
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// and the headers of Table 25: C++ headers for C library facilities [tab:headers.cpp.c]
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"""
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)
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for header in sorted(module_headers if module == "std" else module_c_headers):
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if header in header_restrictions:
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module_cpp_in.write(
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f"""\
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#if {header_restrictions[header]}
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# include <{header}>
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#endif
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"""
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)
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else:
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module_cpp_in.write(f"#include <{header}>\n")
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module_cpp_in.write(
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"""
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// *** Headers not yet available ***
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//
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// This validation is mainly to catch when a new header is added but adding the
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// corresponding .inc file is forgotten. However, the check based on __has_include
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// alone doesn't work on Windows because the Windows SDK is on the include path,
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// and that means the MSVC STL headers can be found as well, tricking __has_include
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// into thinking that libc++ provides the header.
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//
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#ifndef _WIN32
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"""
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)
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for header in sorted(headers_not_available):
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module_cpp_in.write(
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f"""\
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# if __has_include(<{header}>)
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# error "please update the header information for <{header}> in headers_not_available in utils/libcxx/header_information.py"
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# endif // __has_include(<{header}>)
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"""
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)
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module_cpp_in.write(
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f"""#endif // _WIN32
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export module {module};
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{'export import std;' if module == 'std.compat' else ''}
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{'@LIBCXX_MODULE_STD_INCLUDE_SOURCES@' if module == 'std' else ''}
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{'@LIBCXX_MODULE_STD_COMPAT_INCLUDE_SOURCES@' if module == 'std.compat' else ''}"""
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)
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if __name__ == "__main__":
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if len(sys.argv) != 2 or (sys.argv[1] != "std" and sys.argv[1] != "std.compat"):
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sys.stderr.write(
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f"""\
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Usage:
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{os.path.basename(__file__)} (std|std.compat)
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"""
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)
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sys.exit(1)
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write_file(sys.argv[1])
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