https://bugs.llvm.org/show_bug.cgi?id=47622
Bug ID: 47622
Summary: clang does not support long paths
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: federico.kirch...@gmail.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
Hello, clang is inconsistent on how ti handles long paths.
I'm using the cygwin environment for simplicity, but it has nothing to do with
cygwin, as it is only used for calling clang and creating feils/directories.
----
LONG_DIR="D:/1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234/12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890"
mkdir -p "$LONG_DIR"
echo "int main(){}" > "$LONG_DIR/main.cpp"
'/cygdrive/c/Program Files/LLVM/bin/clang++.exe' "$LONG_DIR/main.cpp" -o
"$LONG_DIR/main.exe"
LINK : fatal error LNK1104: cannot open file
'D:\1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234\12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890\123456789012345678901234567890123456789012345
67890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890\main.exe'
----
While following works without issues
----
LONG_DIR="D:/1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234/12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890"
mkdir -p "$LONG_DIR"
echo "int main(){}" > "$LONG_DIR/main.cpp"
'/cygdrive/c/Program Files/LLVM/bin/clang++.exe' "$LONG_DIR/main.cpp"
----
Thus it seems that clang has issues writing, not reading, files in long paths.
If case it is relevant, I've enabled "LongPathsEnabled" on my machine (Windows
10 Version 1909).
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