fix: inherit process environment and untrack libc objects

programs/src/tcc/montauk_main.c

@@ -39,6 +39,9 @@ static inline long _sys2(long nr, long a1, long a2) {
 
 #define SYS_GETSIZE 8
 #define SYS_GETARGS 25
+#define SYS_GETENVIRON 171
+
+void __libc_init_environ(const char *blob, unsigned long len);
 
 /* fdopen, strtoll and strtoull used to be defined here; they moved
    into the Montauk libc with the native binutils port. */
@@ -50,6 +53,11 @@ static inline long _sys2(long nr, long a1, long a2) {
 int main(int argc, char **argv);
 
 void _start(void) {
+    static char envbuf[4096];
+    int envlen = (int)_sys2(SYS_GETENVIRON, (long)envbuf, sizeof(envbuf));
+    if (envlen > 0)
+        __libc_init_environ(envbuf, (unsigned long)envlen);
+
     /* Get command-line arguments from kernel */
     char argbuf[256];
     int len = (int)_sys2(SYS_GETARGS, (long)argbuf, sizeof(argbuf));