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-rw-r--r--mesonbuild/backend/backends.py17
1 files changed, 17 insertions, 0 deletions
diff --git a/mesonbuild/backend/backends.py b/mesonbuild/backend/backends.py
index 2a07058..d75b7a4 100644
--- a/mesonbuild/backend/backends.py
+++ b/mesonbuild/backend/backends.py
@@ -793,8 +793,25 @@ class Backend:
fname = os.path.join(self.environment.get_source_dir(), sp, 'meson_options.txt')
if os.path.isfile(fname):
deps.append(os.path.join(self.build_to_src, sp, 'meson_options.txt'))
+ self.check_clock_skew(deps)
return deps
+ def check_clock_skew(self, file_list):
+ # If a file that leads to reconfiguration has a time
+ # stamp in the future, it will trigger an eternal reconfigure
+ # loop.
+ import time
+ now = time.time()
+ for f in file_list:
+ absf = os.path.join(self.environment.get_build_dir(), f)
+ ftime = os.path.getmtime(absf)
+ delta = ftime - now
+ # On Windows disk time stamps sometimes point
+ # to the future by a minuscule amount, less than
+ # 0.001 seconds. I don't know why.
+ if delta > 0.001:
+ raise MesonException('Clock skew detected. File {} has a time stamp {:.4f}s in the future.'.format(absf, delta))
+
def exe_object_to_cmd_array(self, exe):
if isinstance(exe, build.BuildTarget):
if exe.for_machine is not MachineChoice.BUILD: