***: add various stub functions for binutils

include/fcntl.h

@@ -4,3 +4,5 @@
 
 int open(const char *pathname, int flags, ...);
 int openat(int dfd, const char *pathname, int flags, mode_t mode);
+
+int fcntl(int fd, int cmd, ...);

include/sys/stat.h

@@ -8,6 +8,8 @@ int lstat(const char *restrict path, struct stat *restrict buf);
 int fstat(int fd, struct stat *st);
 int fstatat(int dfd, const char *restrict path, struct stat *restrict buf, int flags);
 
+mode_t umask(mode_t cmask);
+
 int mkdir(const char *path, mode_t mode);
 int mkdirat(int fd, const char *path, mode_t mode);
 int chmod(const char *pathname, mode_t mode);

src/fcntl/fcntl.c

@@ -0,0 +1,9 @@
+#include <assert.h>
+#include <fcntl.h>
+
+int fcntl(int fd, int cmd, ...) {
+    return 0;
+    (void) fd;
+    (void) cmd;
+    assert(0 && "Not implemented yet");
+}

src/stdio/atof.c

@@ -0,0 +1,7 @@
+#include <stdlib.h>
+
+double atof(const char *str) {
+    (void) str;
+    // TODO
+    return 0.0;
+}

src/stdlib/mbstowcs.c

@@ -0,0 +1,9 @@
+#include <stdlib.h>
+#include <assert.h>
+
+size_t mbstowcs(wchar_t *dest, const char *src, size_t n) {
+    (void) dest;
+    (void) src;
+    (void) n;
+    assert(0 && "Not implemented yet\n");
+}

src/sys/stat/umask.c

@@ -0,0 +1,7 @@
+#include <sys/stat.h>
+#include <assert.h>
+
+mode_t umask(mode_t cmask) {
+    (void) cmask;
+    assert(0 && "Not implemented yet");
+}

src/unistd/sysconf.c

@@ -1,7 +1,13 @@
 #include <unistd.h>
-#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
 
 long sysconf(int name) {
-    (void) name;
-    assert(0 && "Not implemented");
+    switch (name) {
+    case _SC_OPEN_MAX:
+        return 16;
+    default:
+        fprintf(stderr, "Unknown sysconf(): %d\n", name);
+        abort();
+    }
 }