fix: distinct fake inodes for directories in stat()

stat() synthesized path-hash inodes for regular files but left st_ino = 0 for directories. GCC's include-path setup deduplicates directories by (st_dev, st_ino), so every directory on MontaukOS compared equal and cc1plus silently dropped all C++ include dirs except the first - <iostream> resolved but the target-specific bits/c++config.h directory was gone. Directories now get the same path-hash inodes as files. (Different spellings of one directory hash differently; the harmless direction - a dir may be searched twice, never dropped.) Native GCC relinked against the fixed libc. Co-Authored-By: Claude Fable 5 <[email protected]>
2026-07-17 10:51:05 +02:00
parent 1c851a3627
commit 6b88db35f2
3 changed files with 11 additions and 1 deletions
@@ -2305,6 +2305,16 @@ int stat(const char *path, struct stat *buf) {
    if (_path_is_directory(path)) {
        buf->st_mode = S_IFDIR;
        buf->st_size = 0;
+        /* Directories need distinct fake inodes too: GCC's include
+           path setup deduplicates directories by (st_dev, st_ino), so
+           leaving 0 here made every directory "the same" and all but
+           one include dir was silently dropped. */
+        unsigned long ino = 5381;
+        for (const char *p = path; *p; p++) {
+            ino = ino * 33 + (unsigned char)*p;
+        }
+        buf->st_ino = ino | 1;
+        buf->st_nlink = 1;
        return 0;
    }