https://llvm.org/bugs/show_bug.cgi?id=28089
Bug ID: 28089
Summary: Short 8.3 paths make clang++ run in C mode, linking
without C++ libraries
Product: clang
Version: 3.8
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Driver
Assignee: unassignedclangb...@nondot.org
Reporter: jibz-llvmb...@stdip.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Clang decides if it is being invoked as a C or C++ compiler based on its
filename.
When installed as `C:\Program Files\LLVM\bin\clang++.exe` on Windows,
the space in the path results in some build systems invoking it with the
short 8.3 path `C:\PROGRA~1\LLVM\bin\CLANG_~1.EXE`, and failing to link
because clang++ thinks it is clang and does not include the C++ libraries.
One example is CMake: https://gitlab.kitware.com/cmake/cmake/issues/16138
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