[C++] Regenerate ninja files when symlink was changed

1 files changed, 15 insertions, 2 deletions

diff --git a/ninja.cc b/ninja.cc
index 9c85815..21c935f 100644
--- a/ninja.cc
+++ b/ninja.cc
@@ -931,8 +931,21 @@ bool NeedsRegen(double start_time, const string& orig_args) {
           // directory which affects the results of find command.
           if (s == "" || s == "." || ShouldIgnoreDirty(s))
             continue;
-          double ts = GetTimestamp(s);
-          should_run_command |= (ts < 0 || gen_time < ts);
+
+          struct stat st;
+          if (lstat(s.c_str(), &st) != 0) {
+            should_run_command = true;
+            continue;
+          }
+          double ts = GetTimestampFromStat(st);
+          if (gen_time < ts) {
+            should_run_command = true;
+            continue;
+          }
+          if (S_ISLNK(st.st_mode)) {
+            ts = GetTimestamp(s);
+            should_run_command |= (ts < 0 || gen_time < ts);
+          }
         }
 
         if (!should_run_command) {