https://llvm.org/bugs/show_bug.cgi?id=27909
Bug ID: 27909
Summary: "--sysroot /" mess up overlaid VFS
Product: clang
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Virtual file system cannot find overlaid file if "--sysroot /" is specified.
Way to reproduce:
$ cat overlay.yml
{
"version": 0,
"use-external-names": false,
"roots": [
{
"type": "file",
"name": "/usr/include/stdio_vfs.h",
"external-contents": "/usr/include/stdio.h"
}
]
}
$ cat foo.c
#include <stdio_vfs.h>
int main() {
printf("foo");
}
$ clang -ivfsoverlay overlay.yml foo.c # NO PROBLEM
$ clang --sysroot / -ivfsoverlay overlay.yml foo.c
foo.c:1:10: fatal error: 'stdio_vfs.h' file not found
#include <stdio_vfs.h>
^
1 error generated.
$
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