https://bugs.llvm.org/show_bug.cgi?id=48081
Bug ID: 48081
Summary: always fatal error (no such file or directory) for
mingw (x86_64-w64-mingw32-gcc-8 (GCC) 8.3-win32
20190406)
Product: clang
Version: unspecified
Hardware: PC
OS: Windows 2000
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: i...@ustchcs.com
CC: llvm-bugs@lists.llvm.org, neeil...@live.com,
richard-l...@metafoo.co.uk
HeaderSearch.cpp (getFileAndSuggestModule) compares std::error_code from
different libraries which has portability issues. We observed on mingw
(x86_64-w64-mingw32-gcc-8 (GCC) 8.3-win32 20190406) this comparison is always
true when compiled as shared libraries. The std::error_category is assumed to
be singleton and the comparison relies on the unique address but it does not
always hold.
The possible fix is avoiding this kind of comparison or fallback to value
comparing and error_category's name comparing.
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