Add -Xlinker option

main.c

@@ -40,7 +40,9 @@ static void usage(int status) {
 }
 
 static bool take_arg(char *arg) {
-  char *x[] = {"-o", "-I", "-idirafter", "-include", "-x", "-MF", "-MT"};
+  char *x[] = {
+    "-o", "-I", "-idirafter", "-include", "-x", "-MF", "-MT", "-Xlinker",
+  };
 
   for (int i = 0; i < sizeof(x) / sizeof(*x); i++)
     if (!strcmp(arg, x[i]))
@@ -213,6 +215,11 @@ static void parse_args(int argc, char **argv) {
       continue;
     }
 
+    if (!strcmp(argv[i], "-Xlinker")) {
+      strarray_push(&ld_extra_args, argv[++i]);
+      continue;
+    }
+
     if (!strcmp(argv[i], "-s")) {
       strarray_push(&ld_extra_args, "-s");
       continue;

test/driver.sh

@@ -302,4 +302,11 @@ echo 'int main() {}' | $chibicc -c -o $tmp/baz.o -xc -
 cc -Wl,-z,muldefs,--gc-sections -o $tmp/foo $tmp/foo.o $tmp/bar.o $tmp/baz.o
 check -Wl,
 
+# -Xlinker
+echo 'int foo() {}' | $chibicc -c -o $tmp/foo.o -xc -
+echo 'int foo() {}' | $chibicc -c -o $tmp/bar.o -xc -
+echo 'int main() {}' | $chibicc -c -o $tmp/baz.o -xc -
+cc -Xlinker -z -Xlinker muldefs -Xlinker --gc-sections -o $tmp/foo $tmp/foo.o $tmp/bar.o $tmp/baz.o
+check -Xlinker
+
 echo OK