https://llvm.org/bugs/show_bug.cgi?id=31408
Bug ID: 31408
Summary: /dev/null is not accepted as output
Product: lld
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedb...@nondot.org
Reporter: d...@golovin.in
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
When detecting compiler features it is common to use '-o /dev/null' option. It
fails with LLD.
Typical test would look like this:
$ echo 'typedef int x;' | clang -x c - -nostdlib -shared -o /dev/null
ld.lld: error: rename failed: Permission denied
So LLD is trying to rename /dev/null. What it is actually trying to do is the
following:
access("/dev/nulltmp4e940395", F_OK) = -1 ENOENT (No such file or
directory)
rename("/dev/null", "/dev/nulltmp4e940395") = -1 EACCES (Permission denied)
I don't know what is the right behavior to implement if /dev/null is an output,
but I think that is not it.
This should also affect NUL on Windows.
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